JP2015183927A - Solar heat storage control device, solar heat storage system and control program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrict running cost of a solar heat storage system even if an energy fee is changed in time basis.SOLUTION: A control device (1) comprises a heat collection prediction part (13) for calculating a predicted solar heat collection amount of a solar heat collector (80); a demand calory prediction part (14) for calculating a predicted demand calory to be supplied to a heat storage material (82a) of a heat storage unit (82); an energy fee monitoring part (15) for monitoring a fee per unit amount of energy required for operating an auxiliary heat source (81); and an auxiliary heat source control part (10) for operating the auxiliary heat source (81) when the fee is less than a prescribed fee in the case that the predicted demand calory exceeds the predicted solar heat collecting calory.

Description

  The present invention relates to a solar heat storage control device.

  In the solar heat storage system, the amount of heat (heat energy) obtained from sunlight is stored in a heat accumulator. The amount of heat stored in the heat accumulator is supplied to a device such as a heating device or a water heater.

  In recent years, various techniques have been developed to reduce the running cost of solar heat storage systems. Patent Document 1 discloses a natural-heat-use hot water bed temperature adjustment device that operates an auxiliary heat source (for example, a heat pump) when the temperature of the heat collection medium in the solar heat collector is lower than a predetermined temperature. .

JP 2002-81761 A (published on March 22, 2002)

  However, Patent Document 1 does not take into consideration temporal fluctuations in energy charges (for example, electricity charges) for operating the auxiliary heat source. For this reason, there exists a problem that the running cost of a solar heat storage system will raise by operating an auxiliary heat source in the time zone when an energy charge is high.

  The present invention has been made in order to solve the above-described problem, and an object of the present invention is to provide a solar heat storage control device capable of suppressing running cost even when the energy fee fluctuates with time. Is to provide.

  In order to solve the above problems, a solar heat storage control device according to an aspect of the present invention includes a solar heat collector, a heat storage device that stores thermal energy collected by the solar heat collector in a heat storage material, and the heat storage device. A solar heat storage control device that controls a solar heat storage system including an auxiliary heat source that adds heat energy to a material, and is a predicted solar heat collection amount that is a predicted value of the amount of heat collected in the solar heat collector by a predetermined time Necessary for operating the auxiliary heat source, the predicted heat amount calculating means for calculating the predicted demand heat amount for calculating the predicted demand heat amount which is the predicted value of the heat amount to be supplied to the heat accumulator by the predetermined time, and the auxiliary heat source Energy charge monitoring means for monitoring a charge per unit amount of energy, and when the predicted demand heat amount exceeds the predicted solar heat collection amount, and the charge is less than a predetermined amount, the auxiliary heat And a, and auxiliary heat source control means for operating.

  According to the solar heat storage control device of one aspect of the present invention, there is an effect that the running cost can be suppressed even when the energy fee fluctuates with time.

It is a functional block diagram which shows the structure of the solar heat storage system which concerns on Embodiment 1 of this invention. It is a figure which shows the schematic structure of the solar heat storage system which concerns on Embodiment 1 of this invention. It is a flowchart which illustrates the flow of the process of heat storage in the solar heat storage system which concerns on Embodiment 1 of this invention. It is a functional block diagram which shows the structure of the solar heat storage system which concerns on Embodiment 2 of this invention. It is a flowchart which illustrates the flow of the process of heat storage in the solar heat storage system which concerns on Embodiment 2 of this invention. It is a functional block diagram which shows the structure of the solar heat storage system which concerns on Embodiment 3 of this invention. It is a figure which shows schematic structure of the solar heat storage system which concerns on Embodiment 3 of this invention. It is a flowchart which illustrates the flow of the process of a thermal storage in the solar thermal storage system which concerns on Embodiment 3 of this invention. It is a functional block diagram which shows the structure of the solar heat storage system which concerns on Embodiment 4 of this invention. It is a flowchart which illustrates the flow of the process of heat storage in the solar heat storage system which concerns on Embodiment 4 of this invention. It is a flowchart which illustrates more specifically the flow of the heat storage process in the solar heat storage system according to the fourth embodiment of the present invention. It is a functional block diagram which shows the structure of the solar heat storage system which concerns on Embodiment 5 of this invention. It is a flowchart which illustrates the flow of the process of heat storage in the solar heat storage system which concerns on Embodiment 5 of this invention. It is a flowchart which illustrates more specifically the flow of the heat storage process in the solar heat storage system according to the fifth embodiment of the present invention.

Embodiment 1
Embodiment 1 of the present invention will be described below with reference to FIGS.

(Solar heat storage system 100)
FIG. 1 is a functional block diagram showing the configuration of the solar heat storage system 100 of the present embodiment.

  The solar heat storage system 100 includes a control device 1 (solar heat storage control device), a solar heat collector 80, an auxiliary heat source 81, a heat storage device 82, a pump 83, and a storage unit 90.

  FIG. 2 is a diagram illustrating a schematic configuration of the solar heat storage system 100 of FIG. 1. Hereinafter, the solar heat collector 80, the auxiliary heat source 81, the heat accumulator 82, and the pump 83 will be described with reference to FIG.

  The solar heat collector 80 is, for example, a heat collector in which a solar panel and a hot water tank are integrally provided. The solar collector 80 has a function of storing (collecting heat) the amount of heat obtained from sunlight.

  For example, water is stored in the solar heat collector 80 as a heat medium. The water stored in the solar collector 80 is warmed by the amount of heat collected.

  Note that the heat medium of the solar heat collector 80 is not necessarily limited to water. The solar collector 80 is a known collector capable of collecting heat from sunlight, such as a flat plate collector, a vacuum tube collector, or a concentrator collector. It's okay.

  In order to enable movement of the heat medium, the solar heat collector 80, the auxiliary heat source 81, and the heat accumulator 82 are fluidly connected by a pipe (not shown).

  The auxiliary heat source 81 has a function of heating the heat source that has flowed from the solar heat collector 80 into the heat accumulator 82 (that is, giving the heat amount to the heat source). The operation of heating the heat source in the auxiliary heat source 81 is controlled by the control device 1. Detailed description of the control will be described later.

  The auxiliary heat source 81 may be a known electric heat source such as an electric heater or a heat pump. On the other hand, the auxiliary heat source 81 may be a known mechanical heat source such as a gas heater or a boiler that generates heat by burning an appropriate fuel (such as gas or kerosene).

  In the solar heat storage system 100, heat storage to the heat storage 82 is performed using both the solar heat collector 80 and the auxiliary heat source 81. For this reason, the auxiliary heat source 81 only needs to supply the heat accumulator 82 with an amount of heat that is insufficient for heat collection using only the solar heat collector 80. Therefore, in the solar heat storage system 100, compared with the heat storage system which does not have the solar heat collector 80, the power consumption required for heat storage is reduced.

  The heat accumulator 82 stores the heat medium supplied from the solar heat collector 80 via the auxiliary heat source 81 in the heat accumulating material 82a provided therein. In other words, the heat accumulator 82 is supplied with the amount of heat from sunlight collected by the solar heat collector 80 and the amount of heat generated in the auxiliary heat source 81, and stores the amount of heat.

  The heat storage device 82 may be, for example, a heat storage tank that stores water as a heat medium. As the heat accumulator 82, for example, a known heat accumulator such as a sensible heat accumulator can be used. The amount of heat stored in the heat accumulator 82 is supplied to a device (not shown) such as a heating device or a water heater.

  In particular, when the amount of heat stored in the heat accumulator 82 is used in a heating device, the heat accumulator 82 may be disposed at the lower floor of a house and used as a heat storage floor heating device.

  In this case, the amount of heat stored in the heat accumulator 82 is naturally released into the house. Therefore, until the heat storage material 82a provided inside the heat storage device 82 has completely released the amount of heat, the heat storage device 82 functions as a heating device that maintains an appropriate room temperature indoors.

  In the present embodiment, the auxiliary heat source 81 and the heat storage device 82 are provided as separate bodies, and a configuration in which heat energy is indirectly applied to the heat storage material 82a through a heat medium is illustrated.

  However, the auxiliary heat source 81 and the heat accumulator 82 may be provided integrally. In this case, for example, the auxiliary heat source 81 provided inside the heat accumulator 82 may directly apply heat energy to the heat storage material 82a.

  That is, the auxiliary heat source 81 only needs to play a role of adding thermal energy to the heat storage material 82a.

  The control device 1 according to the present embodiment supplies the heat storage device 82 to the heat storage device 82 using an auxiliary heat source so that the amount of heat stored in the heat storage device 82 is not insufficient over the unit operation time (for example, 24 hours) of the solar heat storage system 100. The supply of heat is controlled.

  Here, the unit operation time of the solar heat storage system 100 means a period of temporal fluctuation of the energy charge described later. In the following description, the unit operation time is 24 hours. However, the unit operation time is not necessarily limited to 24 hours, and may be a value that is appropriately determined according to the energy charge system.

  The pump 83 moves a part of the heat medium stored in the heat accumulator 82 to the solar heat collector 80. In the solar heat storage system 100, by providing the pump 83, the heat medium can be circulated between the solar heat collector 80 and the heat storage device 82.

(Control device 1)
Hereinafter, a detailed configuration and operation of the control device 1 will be described with reference to FIG.

  The control device 1 comprehensively controls the operation of the solar heat storage system 100. Specifically, the control device 1 includes (i) a solar heat collector 80, (ii) a heat storage device 82 that stores thermal energy collected by the solar heat collector 80 in the heat storage material 82a, and (iii) heat storage. The solar heat storage system 100 including the auxiliary heat source 81 that adds heat energy to the heat storage material 82a of the vessel 82 is controlled.

  In particular, the control device 1 plays a role of controlling the operation of the auxiliary heat source 81. The function of the control device 1 may be realized by a CPU (Central Processing Unit) executing a program stored in the storage unit 90.

  The storage unit 90 is a storage device that stores various programs executed by the control device 1 and data used by the programs. The storage unit 90 stores weather information 91 and energy charge information 92.

  In the present embodiment, the control device 1 includes an auxiliary heat source control unit 10 (auxiliary heat source control unit), a heat collection amount prediction unit 13 (predicted heat collection amount calculation unit), a demand heat amount prediction unit 14 (predicted demand heat amount calculation unit), and energy. It functions as a charge monitoring unit 15 (energy charge monitoring means).

  The auxiliary heat source control unit 10 functions as a supply availability determination unit 11 and a drive availability determination unit 12. In this embodiment, the case where the supply availability determination part 11 and the drive availability determination part 12 are provided separately is illustrated.

  However, in the auxiliary heat source control unit 10, the supply availability determination unit 11 and the drive availability determination unit 12 may be provided integrally. The same applies to the auxiliary heat source control unit of each embodiment described later.

(Heat collection amount prediction unit 13)
The heat collection amount prediction unit 13 calculates a predicted solar heat collection amount as a predicted value of the heat amount collected by the solar heat collector 80. Further, the heat collection amount prediction unit 13 also has a function of causing the storage unit 90 to store the value of the heat amount actually collected by the solar heat collector 80.

  Here, the predicted amount of solar heat collected means a predicted value of the amount of heat collected by the solar heat collector 80 from the present time to a predetermined time.

  In the first embodiment, the calculation of the predicted solar heat collection amount in the heat collection amount prediction unit 13 is performed immediately after the operation of the solar heat storage system 100 is started (for example, at midnight). Further, as the predetermined time, the end time of the unit operation time (for example, 24:00 pm) may be set.

  Therefore, the predicted solar heat collection amount in the first embodiment covers the unit operation time (specifically, from midnight to 24:00 pm) of the solar heat storage system 100 immediately after the start of the operation of the solar heat storage system 100. It means the predicted value of heat collection.

  The predicted solar heat collection amount is a predicted value of change over time of the amount of heat collected by the solar heat collector 80 in the solar heat storage system 100. In order to facilitate confirmation by a consumer, the predicted solar heat collection amount may be displayed as a graph on a display device (not shown), for example.

  The calculation of the predicted solar heat collection amount in the heat collection amount prediction unit 13 is performed based on, for example, a weather forecast.

  In the heat collection amount prediction unit 13, for example, if the weather in the weather forecast is (i) “sunny”, the “sunshine rate is 100%”, and if (ii) “sunny, sometimes cloudy”, the “sunshine rate” The predicted value of the sunshine rate corresponding to the weather forecast is determined as “50%”. Then, the heat collection amount prediction unit 13 calculates a predicted solar heat collection amount from the predicted value of the sunshine rate.

  The weather forecast data used by the heat collection amount prediction unit 13 to determine the predicted value of the sunshine rate is included in the weather information 91 stored in the storage unit 90. Therefore, the heat collection amount prediction unit 13 refers to the weather information 91 and calculates the predicted solar heat collection amount.

  The heat collection amount prediction unit 13 gives the calculated predicted solar heat collection amount value to the supply possibility determination unit 11. In addition, the heat collection amount prediction unit 13 also provides the supply possibility determination unit 11 with the value of the heat amount actually collected by the solar heat collector 80.

  Note that the predicted solar heat collection value may be given a range in consideration of the prediction probability and the degree of influence (or safety factor) on each device provided in the solar heat storage system 100.

  The weather information 91 is acquired from a data center, a cloud center, a control plan base, the Japan Meteorological Agency, or an appropriate website, and is stored in the storage unit 90. The weather information 91 and energy charge information 92 described later may be acquired by the control device 1.

  Further, in order to improve the accuracy of calculation of the predicted solar heat collection amount in the heat collection amount prediction unit 13, in addition to the weather forecast data, a database of weather, temperature, solar light collection amount in the past date, etc. The weather information 91 may be used.

  Thereby, in the heat collection amount prediction unit 13, the predicted solar heat collection amount can be calculated with higher accuracy by comparing the weather forecast of the current day with the past data recorded in the database.

  In addition, in order to improve the accuracy of calculation of the predicted solar heat collection amount in the heat collection amount prediction unit 13, detailed spot weather forecast information for each region may also be used as the weather information 91.

  Further, in order to further improve the accuracy of calculation of the predicted solar heat collection amount in the heat collection amount prediction unit 13, it is conceivable to realize the control device 1 by a high-performance computer system such as a super computer.

  In this case, by using a large-scale calculation resource of the high-performance computer system, the heat collection amount prediction unit 13 can perform calculation for predicting the time transition of the cloud based on the weather information 91. Therefore, the calculation of the predicted solar heat collection amount can be performed with higher accuracy in consideration of the time transition of the clouds.

  Note that the calculation of the predicted solar heat collection amount in the heat collection amount prediction unit 13 may be performed only once within the unit operation time, or a plurality of times (for example, in each designated time zone) within the unit operation time. May be performed once).

  In the present embodiment, the calculation of the predicted solar heat collection amount in the heat collection amount prediction unit 13 is performed only once per unit operation time. In Embodiment 2 described later, the calculation of the predicted solar heat collection amount in the heat collection amount prediction unit 13 is repeated a plurality of times within the unit operation time.

(Demand heat quantity prediction unit 14)
The demand heat quantity prediction unit 14 calculates a predicted demand heat quantity as a predicted value of the heat quantity to be supplied to the heat accumulator 82. The demand heat quantity prediction unit 14 gives the calculated predicted demand heat quantity value to the supply possibility determination unit 11.

  Here, the predicted heat demand amount means a predicted value of the heat amount to be supplied to the heater 82 from the present time to a predetermined time.

  In the first embodiment, the calculation of the predicted demand heat quantity in the demand heat quantity prediction unit 14 is performed immediately after the operation of the solar heat storage system 100 is started. As the predetermined time, the end time of the unit operation time (for example, 24:00 pm) may be set.

  Accordingly, the predicted demand heat quantity in the first embodiment is a regenerator over the unit operation time (specifically, from midnight to 24:00 pm) of the solar heat storage system 100 immediately after the operation of the solar heat storage system 100 is started. This means a predicted value of the amount of heat to be supplied to 82.

  Specifically, the predicted heat demand is a predicted value of a change over time in the amount of heat to be supplied to the heat accumulator 82 in the solar heat storage system 100. In order to facilitate confirmation by a consumer, the predicted demand heat quantity may be displayed as a graph, for example, on a display device (not shown).

  The calculation of the predicted demand heat amount in the demand heat amount prediction unit 14 is performed by referring to the weather information 91 as in the heat collection amount prediction unit 13. The calculation of the predicted demand heat quantity in the demand heat quantity prediction unit 14 is performed based on, for example, a weather forecast.

  Specifically, the calculation of the predicted demand heat quantity in the demand heat quantity prediction unit 14 includes (i) actual values such as past date, weather, and temperature, and (ii) predicted values such as past date, weather, and temperature. (Iii) Actual data of the amount of heat storage used by the customer, (iv) Multiple regression / principal component analysis or memory-based reasoning using the solar heat storage system operation plan during the period when the heat storage 82 is controlled Etc. are performed based on the above method.

  Also, the predicted demand heat quantity may be given a range in consideration of the prediction probability and the degree of influence (or safety factor) on each device provided in the solar heat storage system 100.

  The calculation of the predicted demand heat quantity in the demand heat quantity prediction unit 14 may be performed only once within the unit operation time, or may be performed a plurality of times within the unit operation time.

(Energy fee monitoring unit 15)
The energy charge monitoring unit 15 has a function of monitoring temporal fluctuations in the energy charge. Here, the energy charge means a charge per unit amount of energy necessary for generating heat in the auxiliary heat source 81.

  For example, when the auxiliary heat source 81 is an electric heat source such as an electric heater, the energy charge means an electric charge. In the present embodiment, the description will be made on the assumption that the energy charge is an electricity charge.

  On the other hand, when the auxiliary heat source 81 is a mechanical heat source such as a gas heater, the energy fee may mean a fuel fee (for example, a gas fee).

  The energy fee at each time is included in the energy fee information 92 stored in the storage unit 90. Therefore, the energy charge monitoring unit 15 refers to the energy charge information 92 and monitors temporal changes in the energy charge.

  The energy fee information 92 may be obtained directly from an organization (for example, an electric power company or an electric power retailer) that determines an electric fee of a building where the solar heat storage system 100 is installed.

  The energy fee monitoring unit 15 refers to the energy fee information 92 and detects a time zone (operation permitted time zone) in which the energy fee is equal to or less than the predetermined amount C. In the present embodiment, the energy charge monitoring unit 15 refers to the energy charge information 92 and determines whether or not the current energy charge is equal to or less than the predetermined amount C.

  Then, the energy charge monitoring unit 15 gives the energy charge determination result information indicating the result of determining whether or not the current energy charge is equal to or less than the predetermined amount C to the drive availability determination unit 12.

  In the present embodiment, it is assumed that there are a plurality (at least two or more) of time zones with different energy charges in the unit operation time (24 hours) of the solar heat storage system 100.

  For example, consider a case where there are two time zones with different energy charges. Assuming a general electricity rate structure, the nighttime energy charge is cheaper than the daytime energy charge. On the other hand, it may be assumed that the nighttime energy charge is cheaper than the daytime energy charge.

  In addition, when there are three time zones with different energy charges (for example, midnight, daytime, and nighttime), the order of increasing energy charges is (daytime charge)> (nighttime charge). In the case of> (midnight charge) or (night charge)> (day charge)> (midnight charge), a total of six cases can be assumed. Note that time zones such as midnight, daytime, and nighttime may be expressed as specific time ranges.

  When there are four or more time zones with different energy rates, the energy rates may be different in all time zones, or the energy rates may be the same in non-continuous time zones.

(Supply availability determination unit 11)
The supply possibility determination unit 11 is provided with (i) the predicted solar heat collection amount calculated by the heat collection amount prediction unit 13 and (ii) the predicted demand heat amount calculated by the demand heat amount prediction unit 14.

  The supply possibility determination unit 11 determines whether or not the amount of heat to be supplied to the heat accumulator 82 can be supplied only by the solar heat collector 80 using the predicted amount of solar heat collection and the amount of predicted demand heat.

  For example, the supply possibility determination unit 11 can supply the heat amount to be supplied to the heat accumulator 82 only by the solar heat collector 80 when the value of the predicted solar heat collection amount is equal to or greater than the value of the predicted demand heat amount. You may judge.

  The supply enable / disable determining unit 11 generates supply enable / disable result information indicating a result of determining whether the amount of heat to be supplied to the heat storage device 82 can be supplied only by the solar heat collector 80, and the supply enable / disable result. Information is given to the drive availability determination unit 12.

  The supply possibility determination unit 11 is also given a value of the amount of heat actually collected by the solar heat collector 80 from the heat collection amount prediction unit 13. The supply possibility determination unit 11 determines whether or not the solar heat collector 80 can collect heat using the value of the amount of heat actually collected by the solar heat collector 80.

  For example, when the value per unit time of the amount of heat actually collected by the solar collector 80 is larger than a predetermined value, the supply availability determination unit 11 determines that the solar collector 80 collects heat. Is determined to be possible.

  Moreover, the supply possibility determination part 11 determines whether the thermal storage in the solar heat storage system 100 was completed using the value of the calorie | heat amount which the solar heat collector 80 actually collected heat.

  For example, when the value of the heat amount actually collected by the solar heat collector 80 is larger than the value of the predicted demand heat amount, it is determined whether or not the heat storage in the solar heat storage system 100 is completed.

(Drivability determination unit 12)
The drive availability determination unit 12 controls the operation of the auxiliary heat source 81. More specifically, the drive availability determination unit 12 determines whether to operate the auxiliary heat source 81. Furthermore, when the auxiliary heat source 81 is operated, the drive availability determination unit 12 determines in which time zone the auxiliary heat source 81 is operated.

  The drive availability determination unit 12 is provided with (i) supply availability result information from the supply availability determination unit 11 and (ii) energy rate determination result information from the energy rate monitoring unit 15.

  The drive availability determination unit 12 refers to the supply availability result information, and when the supply availability determination unit 11 determines that the amount of heat to be supplied to the heat accumulator 82 can be supplied only by the solar heat collector 80. Then, a control signal for controlling the auxiliary heat source 81 not to operate is generated.

  Therefore, the auxiliary heat source 81 does not operate when the control signal is given from the drive availability determination unit 12 and the amount of heat to be supplied to the heat accumulator 82 can be supplied only by the solar heat collector 80. Controlled.

  On the other hand, the drive availability determination unit 12 refers to the supply availability result information, and when the supply availability determination unit 11 determines that the amount of heat to be supplied to the heat accumulator 82 cannot be supplied only by the solar heat collector 80. Generates a control signal for controlling the auxiliary heat source 81 to operate.

  In this case, the drive availability determination unit 12 further refers to the energy fee determination result information. Then, when the energy charge determination result information indicates that the current energy charge is equal to or less than the predetermined amount C, the drive availability determination unit 12 performs control to control the auxiliary heat source 81 to operate. Generate a signal.

  On the other hand, when the energy rate determination result information indicates that the current energy rate is not equal to or less than the predetermined amount C, the drive availability determination unit 12 controls the auxiliary heat source 81 not to operate. Is generated.

  Accordingly, when the auxiliary heat source 81 is provided with the control signal from the drive availability determination unit 12 and the amount of heat to be supplied to the heat accumulator 82 cannot be supplied only by the solar heat collector 80, the energy charge is predetermined. It is controlled to operate only during a time period that is cheaper than the amount of money.

  The predetermined amount C may be a value that can be arbitrarily set by the user of the solar heat storage system 100. As an example, when the nighttime energy charge is “8 yen / kWh” and the daytime energy charge is “10 yen / kWh”, the predetermined amount C is set as “9 yen / kWh”. Good.

(Flow of heat storage process in solar heat storage system 100)
FIG. 3 is a flowchart illustrating the heat storage processing flow in the solar heat storage system 100. Hereinafter, the processing S1 to S8 will be described with reference to FIG.

  In addition, process S1-S8 illustrates the process over the unit operation time (24 hours) of the solar heat storage system 100. FIG. Prior to the processing S1, the control device 1 is activated by the user.

  The heat collection amount prediction unit 13 calculates the predicted solar heat collection amount (processing S1), and gives the value of the predicted solar heat collection amount to the supply possibility determination unit 11. The demand heat quantity prediction unit 14 calculates the predicted demand heat quantity (processing S2), and gives the value of the predicted demand heat quantity to the supply possibility determination unit 11.

  Subsequently, the supply possibility determination unit 11 uses the predicted solar heat collection amount and the predicted demand heat amount to determine whether the heat amount to be supplied to the heat accumulator 82 can be supplied only by the solar heat collector 80. Determination is made (processing S3). The supply availability determination unit 11 gives supply availability determination information indicating the determination result to the drive availability determination unit 12.

  When it is determined in the supply possibility determination unit 11 that the amount of heat to be supplied to the heat accumulator 82 can be supplied only by the solar heat collector 80 (YES in the process S3), the drive availability determination unit 12 The heat source 81 is not operated. And it progresses to process S6 mentioned later.

  On the other hand, when the supply possibility determination unit 11 determines that the amount of heat to be supplied to the heat accumulator 82 cannot be supplied only by the solar heat collector 80 (NO in process S3), the drive availability determination part 12 The energy fee determination result information given from the energy fee monitoring unit 15 is further referred to. Then, the drive availability determination unit 12 refers to the energy fee determination result information and confirms whether or not the current energy fee is equal to or less than the predetermined amount C (processing S4).

  When the current energy charge is equal to or less than the predetermined amount C (YES in process S4), the drive availability determination unit 12 operates the auxiliary heat source 81 (process S5).

  On the other hand, if the current energy charge is not equal to or less than the predetermined amount C (NO in process S4), the drive availability determination unit 12 does not operate the auxiliary heat source 81. And it progresses to process S6 mentioned later.

  Subsequently, in the supply possibility determination unit 11, the solar heat collector 80 collects heat using the value of the heat amount actually collected by the solar heat collector 80, which is given from the heat collection amount prediction unit 13. It is determined whether or not it is possible (process S6).

  If supply possibility determination unit 11 determines that solar heat collector 80 can collect heat (YES in process S6), heat collection by sunlight is performed (process S7). On the other hand, when it is determined that solar collector 80 cannot collect heat (NO in process S6), heat collection by sunlight is not performed. And it progresses to process S8 mentioned later.

  The supply possibility determination unit 11 determines whether or not the heat storage in the solar heat storage system 100 is completed using the value of the amount of heat actually collected by the solar heat collector 80 (processing S8).

  When supply possibility determination unit 11 determines that heat storage in solar heat storage system 100 has been completed (YES in process S8), the heat storage process in solar heat storage system 100 ends.

  On the other hand, when supply possibility determination part 11 determines with heat storage in solar heat storage system 100 not being completed (in processing S8 NO), it returns to above-mentioned processing S3. As described above, the heat storage process in the solar heat storage system 100 is performed by the processes S1 to S8.

  In addition, when the process of the heat storage in the solar heat storage system 100 is completed, starting of the control apparatus 1 may be complete | finished. In this case, the control device 1 is restarted at a specified time, and executes the above-described processes S1 to S8 again.

  The specified time at which the control device 1 is restarted may be set to, for example, 24:00 (at the end of the day). However, the specified time is not necessarily limited to 24:00.

  For example, the specified time may be set to 23:00 (at the start of the late night charge). The specified time may be a value that is appropriately set by the user of the solar heat storage system 100.

(Effect of solar heat storage system 100)
According to the solar heat storage system 100 of the present embodiment, in the case where it is predicted that the heat demand cannot be supplied only by collecting heat by the solar heat collector 80, only in the time zone when the energy fee is inexpensive, The heat source 81 can be operated.

  Therefore, for example, even when the weather is cloudy and it is necessary to operate the auxiliary heat source 81, the running cost of the solar heat storage system 100 can be suppressed according to the temporal fluctuation of the energy charge. There is an effect.

  Further, in the solar heat storage system 100, the amount of heat that can be collected by the solar heat collector 80 even when heat collection by the solar heat collector 80 is performed during or after the operation of the auxiliary heat source 81. The heat collection by the solar heat collector 80 can be prioritized.

  In addition, the energy charge is not necessarily common nationwide, and is subject to various conditions such as the area where the solar heat storage system 100 is provided or the energy supply status of facilities that supply energy to the solar heat storage system 100. It is conceivable that it will vary accordingly.

  For example, it can be said that in the current Japanese electricity bill system, the late-night electricity bill is generally cheaper than during the day. However, in recent years, there is a possibility that the system of electricity charges may be changed due to reasons such as the inability to operate a nuclear power plant as a base power source.

  In such a case, it is assumed that the rate of increase in electricity charges at midnight is greater than the rate of increase in electricity charges during the day. Furthermore, in some areas, demonstration experiments have been conducted in which the charge during the daytime hours varies according to the state of power usage within the community. For this reason, it may be assumed in the future that the late-night electricity fund may not be the cheapest.

  According to the solar heat storage system 100, even in such a case, there is an advantage that the running cost of the system can be suppressed according to the temporal fluctuation of the energy charge.

  Moreover, even if the energy rate is a rate other than an electricity rate (for example, a gas rate), if the energy rate varies depending on the time zone, the solar heat storage system 100 can similarly reduce the system running cost. It is.

  Therefore, the solar heat storage system 100 is useful even when the energy fee system other than the electricity fee is changed to a fee structure similar to the electricity fee due to a future change in the fee structure.

[Embodiment 2]
The following will describe another embodiment of the present invention with reference to FIGS. For convenience of explanation, members having the same functions as those described in the embodiment are given the same reference numerals, and descriptions thereof are omitted.

(Solar heat storage system 200)
FIG. 4 is a functional block diagram showing the configuration of the solar heat storage system 200 of the present embodiment.

  The solar heat storage system 200 includes a control device 2 (solar heat storage control device), a solar heat collector 80, an auxiliary heat source 81, a heat storage device 82, a pump 83, and a storage unit 90.

  In the present embodiment, the control device 2 includes an auxiliary heat source control unit 20 (auxiliary heat source control unit), a heat collection amount prediction unit 13, a demand heat amount prediction unit 14, an energy rate monitoring unit 15, and an insufficient heat amount calculation unit 23 (difference calculation unit). ). The auxiliary heat source control unit 20 functions as a supply availability determination unit 21 and a drive availability determination unit 22.

  The control device 2 of the present embodiment is similar to the control device 1 of the first embodiment in that (i) the insufficient heat amount calculation unit 23 is added, and (ii) the supply availability determination unit 11 and the drive availability determination unit 12 are This configuration is realized by replacing the determination unit 21 and the drive availability determination unit 22 respectively.

(Insufficient heat quantity calculation unit 23)
The insufficient heat amount calculation unit 23 is given (i) the predicted solar heat collection amount calculated by the heat collection amount prediction unit 13 and (ii) the predicted demand heat amount calculated by the demand heat amount prediction unit 14.

  The insufficient heat amount calculation unit 23 calculates the insufficient heat amount. Here, the shortage heat amount is a value of a difference between the predicted demand heat amount and the predicted solar heat collection amount. The insufficient heat amount calculation unit 23 gives the calculated insufficient heat amount value to the supply possibility determination unit 21.

  Note that, as shown in FIG. 5 described later, in the solar heat storage system 200, the calculation of the predicted solar heat collection amount in the heat collection amount prediction unit 13 is performed periodically (repetitively) in the unit operation time of the system. Done.

  For example, immediately after the operation of the solar heat storage system 200 starts (processing S11 in FIG. 5), the calculation of the predicted solar heat collection amount in the heat collection amount prediction unit 13 is performed once. The predicted solar heat collection amount in this case means a predicted value of the heat collection amount over the entire unit operation time of the solar heat storage system 200.

  And before heat storage is completed in the solar heat storage system 200 (process S18 of FIG. 5), the calculation of the predicted solar heat collection amount in the heat collection amount prediction unit 13 is performed again. The predicted solar heat collection amount in this case means a predicted value of the heat collection amount over the time from the time (for example, 18:00) until the operation of the solar heat storage system 200 ends.

  For this reason, in the solar heat storage system 200, the calculation of the insufficient heat amount in the insufficient heat amount calculation unit 23 is also periodically performed in the unit operation time of the system according to the number of times of calculation of the predicted solar heat collection amount in the heat collection amount prediction unit 13. Done.

(Supply availability determination unit 21)
The supply availability determination unit 21 of the present embodiment has the same function as the supply availability determination unit 11 of Embodiment 1. The supply possibility determination unit 21 of the present embodiment uses the value of the insufficient heat amount given from the insufficient heat amount calculation unit 23 to determine the amount of heat to be supplied to the heat accumulator 82 in the same manner as the supply possibility determination unit 11 of the first embodiment. It is determined whether or not the solar collector 80 can be supplied only.

  As described above, the calculation of the insufficient heat amount in the insufficient heat amount calculation unit 23 is periodically performed during the unit operation time of the system. For this reason, the determination in the supply availability determination unit 21 is also periodically performed during the unit operation time of the system.

  The supply possibility determination unit 21 of the present embodiment also has a function of determining whether or not the value of the insufficient heat amount given this time is larger than the value of the insufficient heat amount given last time.

  And when the value of the insufficient heat amount given this time is larger than the value of the insufficient heat amount given last time, the supply availability determination unit 21 indicates an increase in the insufficient heat amount indicating the increase in the heat amount to be supplied by the auxiliary heat source 81. Calculate the value. Here, the insufficient heat amount increase value is a value of a difference between (i) the value of the insufficient heat amount given this time and (ii) the value of the insufficient heat amount given last time. The supply availability determination unit 21 gives the calculated insufficient heat amount increase value to the drive availability determination unit 22.

(Drivability determination unit 22)
The drive availability determination unit 22 of the present embodiment has the same function as the drive availability determination unit 12 of the first embodiment.

  The drive availability determination unit 22 of the present embodiment also has a function of controlling the operation of the auxiliary heat source 81 using the insufficient heat amount increase value given from the supply availability determination unit 21.

  The drive availability determination unit 22 refers to the insufficient heat amount increase value, and when the insufficient heat amount increase value is a positive value (that is, the amount of heat to be supplied by the auxiliary heat source 81 is increased), the auxiliary heat source 81 is turned on. A control signal for controlling to operate is generated.

  In this case, the drive availability determination unit 22 further refers to the energy fee determination result information. The drive availability determination unit 22 performs control to operate the auxiliary heat source 81 when the energy charge determination result information indicates that the current energy charge is equal to or less than the predetermined amount C. Generate a signal.

  When the auxiliary heat source 81 is not yet operated, that is, when there is a time zone in which the energy fee is equal to or less than the predetermined amount C after the current time, (i) depending on the originally planned auxiliary heat source 81 The amount of heat storage and (ii) the increase in the amount of heat storage due to the shortage of the amount of heat collected by the solar heat collector 80 (that is, the difference between the predicted amount of solar heat collected calculated this time and the amount of predicted solar heat collected calculated last time) The auxiliary heat source 81 may be controlled so as to be stored in a time zone in which the energy charge is equal to or less than the predetermined amount C.

  In addition, when the time period in which the energy fee is equal to or less than the predetermined amount C exists after the time when the heat demand occurs, or when the energy fee does not change over the unit operation time, You may control to operate the auxiliary | assistant heat source 81 so that the heat storage amount required by the time when a heat demand generate | occur | produces can be ensured in the time slot | zone when an energy charge continues.

(Flow of heat storage process in solar heat storage system 200)
FIG. 5 is a flowchart illustrating the heat storage processing flow in the solar heat storage system 200.

  Note that although steps S11 to S20 are shown in FIG. 5, steps S11 to S17 are the same as steps S1 to S7 in FIG. Further, the process S20 in FIG. 5 is the same process as the process S8 in FIG. Therefore, description of these processes is omitted.

  Hereinafter, with reference to FIG. 5, only the processes S18 and S19 and the processes before and after that will be described.

  After the process S16 or the process S17, the heat collection amount prediction unit 13 calculates a predicted solar heat collection amount (process S18).

  Then, the insufficient heat amount calculation unit 23 calculates the insufficient heat amount using (i) the predicted solar heat collection amount calculated in the process S18 and (ii) the predicted demand heat amount calculated in the process S2 (process S19). ). Subsequently, in process S20, as in process S7, it is determined whether or not heat storage has been completed.

  Process S18 is the same process as process S1. That is, in the solar heat storage system 200 of the present embodiment, the predicted solar heat collection amount is calculated not only immediately after the start of the solar heat storage system but also immediately before the heat storage is completed. In this respect, the solar heat storage system 200 of the present embodiment is different from the solar heat storage system 100 of the first embodiment.

  Therefore, in process S19, the insufficient heat amount is updated using the updated predicted solar heat collection value. Therefore, in the solar heat storage system 200, the operation of the auxiliary heat source 81 can be controlled using the updated value of the insufficient heat amount.

(Effect of solar heat storage system 200)
In the solar heat storage system 200 of the present embodiment, the value of the predicted solar heat collection amount is periodically updated over the unit operation time of the system.

  For this reason, even if the predicted solar heat collection amount calculated immediately after the start of the solar heat storage system 200 is greatly different from the actual predicted solar heat collection amount, the predicted solar heat collection amount is calculated again immediately before the heat storage. By doing so, the accuracy of the predicted solar heat collection amount can be improved.

  Then, in the solar heat storage system 200 of the present embodiment, the value of the insufficient heat quantity is also periodically updated in the same manner as the predicted solar heat collection value. Therefore, it is possible to operate the auxiliary heat source 81 only during a time period when the energy charge is inexpensive, using the latest value of the insufficient heat amount.

  That is, whenever the latest value of the insufficient heat quantity is calculated, the system control of the solar heat storage system 200 can be corrected at any time. For this reason, there exists an effect that the running cost of the solar heat storage system 200 can be more effectively suppressed according to the time fluctuation | variation of an energy rate.

[Embodiment 3]
The following will describe another embodiment of the present invention with reference to FIGS. For convenience of explanation, members having the same functions as those described in the embodiment are given the same reference numerals, and descriptions thereof are omitted.

(Solar heat storage system 300)
FIG. 6 is a functional block diagram showing the configuration of the solar heat storage system 300 of the present embodiment.

  The solar heat storage system 300 includes a control device 3 (solar heat storage control device), a solar heat collector 80, an auxiliary heat source 81, a heat storage device 82, a pump 83, a flow path switching valve 84 (bypass), and a thermometer 89a (first temperature). Meter), a thermometer 89b (second thermometer), and a storage unit 90.

  In the present embodiment, the control device 3 includes an auxiliary heat source control unit 20, a heat collection amount prediction unit 13, a demand heat amount prediction unit 14, an energy charge monitoring unit 15, an insufficient heat amount calculation unit 23, and a flow path switching valve control unit 33 (flow Function as a path switching means). The control apparatus 3 of this embodiment is a structure implement | achieved by adding the flow-path switching valve control part 33 in the control apparatus 2 of Embodiment 2. FIG.

  FIG. 7 is a diagram showing a schematic configuration of the solar heat storage system 300 of FIG. Hereinafter, the flow path switching valve 84, the thermometer 89a, and the thermometer 89b will be described with reference to FIG.

  As described in the first embodiment, the solar heat collector 80, the auxiliary heat source 81, and the heat accumulator 82 are fluidly connected by a pipe (not shown) provided as a heat medium flow path. In the solar heat storage system 300 of the present embodiment, a flow path switching valve 84 that switches the flow of the heat medium is further provided in the pipe.

  The flow path switching valve 84 has a function of mechanically switching the flow path of the heat medium. Specifically, in the flow path switching valve 84, the flow path is formed so that the heat medium does not flow into the heat accumulator 82 when the valve provided inside is closed. In this case, the heat medium flows through the flow path of the solar collector 80 → the auxiliary heat source 81 → the pump 83.

  On the other hand, in the flow path switching valve 84, the flow path is formed so that the heat medium flows into the heat accumulator 82 when the valve provided therein is opened. That is, the same flow path as the solar heat storage systems 100 and 200 of Embodiments 1 and 2 described above is formed. Accordingly, the heat medium flows through the flow path of the solar heat collector 80 → the auxiliary heat source 81 → the heat accumulator 82 → the pump 83.

  That is, it can be said that the flow path switching valve 84 is a bypass for returning the heat medium heated by the solar heat collector 80 to the solar heat collector 80 without circulating it to the heat accumulator 82. The flow path switching operation in the flow path switching valve 84 is controlled by the flow path switching valve control unit 33. Details of the control by the flow path switching valve control unit 33 will be described later.

  The solar heat storage system 300 is further provided with a thermometer 89a that measures the temperature T1 of the heat medium flowing inside the solar heat collector 80. The thermometer 89a may be provided, for example, at the outlet of the heat medium that flows inside the solar heat collector 80. The temperature T1 measured by the thermometer 89a is given to the flow path switching valve control unit 33.

  In the present embodiment, only one thermometer 89a is provided as a thermometer for measuring the temperature T1. However, two or more thermometers may be provided to measure the temperature T1.

  In this case, two or more thermometers may be collectively referred to as a thermometer 89a. A value obtained as a result of performing appropriate statistical processing on the plurality of temperature data measured by the plurality of thermometers 89a may be set as the value of the temperature T1.

  For example, an average value (or mode value) of the temperature of the heat medium measured by the plurality of thermometers 89a may be set as the value of the temperature T1. The maximum value (or minimum value) of the temperature of the heat medium measured by the plurality of thermometers 89a may be set as the value of the temperature T1.

  The solar heat storage system 300 is further provided with a thermometer 89b that measures the temperature T2 of the heat storage material 82a provided inside the heat storage device 82. The temperature T2 measured by the thermometer 89b is given to the flow path switching valve control unit 33.

  In the present embodiment, only one thermometer 89b is provided as a thermometer for measuring the temperature T2. However, two or more thermometers may be provided to measure the temperature T2.

  In this case, two or more thermometers may be collectively referred to as the thermometer 89b. As in the case of the thermometer 89a, a value obtained as a result of performing an appropriate statistical process on the plurality of temperature data measured by the plurality of thermometers 89b may be set as the value of the temperature T2. .

(Flow path switching valve controller 33)
The flow path switching valve control unit 33 is given (i) the value of the temperature T1 measured by the thermometer 89a and (ii) the value of the temperature T2 measured by the thermometer 89b. The flow path switching valve control unit 33 compares the value of the temperature T1 with the value of the temperature T2.

  When it is determined that the value of the temperature T1 is equal to or higher than the value of the temperature T2, the flow path switching valve control unit 33 gives a control signal that instructs the flow path switching valve 84 to open the valve.

  Therefore, when the value of the temperature T1 is equal to or higher than the value of the temperature T2, the flow path switching valve 84 forms a flow path so that the heat medium flows into the heat accumulator 82. In this case, the heat medium flowing into the heat accumulator 82 is heated according to the operation of the heat accumulator 82.

  On the other hand, when it is determined that the value of the temperature T1 is smaller than the value of the temperature T2, the flow path switching valve control unit 33 gives a control signal that instructs the flow path switching valve 84 to close the valve.

  Therefore, when the value of the temperature T1 is smaller than the value of the temperature T2, the flow path switching valve 84 forms a flow path so that the heat medium does not flow into the heat accumulator 82. In this case, the heat medium is circulated again to the solar heat collector 80 via the pump 83 and is heated by the amount of heat collected in the solar heat collector 80.

  In other words, the flow path switching valve controller 33 bypasses the flow path switching valve 84 only when the temperature T1 of the heat medium in the solar heat collector 80 is equal to or higher than the temperature T2 of the heat medium in the heat accumulator 82. ).

(Flow of heat storage process in solar heat storage system 300)
FIG. 8 is a flowchart illustrating the heat storage processing flow in the solar heat storage system 300.

  8 shows processes S31 to S43, but the processes S31 to S36 are the same processes as the processes S11 to S16 of FIG. Further, the processes S40 to S43 in FIG. 8 are the same processes as the processes S17 to S20 in FIG. Therefore, description of these processes is omitted.

  Hereinafter, with reference to FIG. 8, only the processes S37 to S39 and the processes before and after that will be described.

  After it is determined in process S36 that heat collection by the solar heat collector 80 is possible (YES in process S36), the flow path switching valve control unit 33 determines that the value of the temperature T1 measured by the thermometer 89a is the temperature. It is determined whether or not the temperature is equal to or higher than the value of the temperature T2 measured in the total 89b (processing S37).

  And when it determines with the value of temperature T1 being more than the value of temperature T2 (in process S37 YES), the flow-path switching valve control part 33 makes the flow-path switching valve 84 open a valve, A heat medium is caused to flow into the heat accumulator 82 (processing S38). And after process S38, it progresses to process S40.

  On the other hand, when it is determined that the value of temperature T1 is smaller than the value of temperature T2 (NO in process S37), the flow medium switching valve 84 is closed to prevent the heat medium from flowing into the heat accumulator 82. (Processing S39). And after process S39, it progresses to process S40.

(Effect of solar heat storage system 300)
The solar heat storage system 300 of this embodiment stores heat only when the temperature T1 of the heat medium flowing inside the solar heat collector 80 is equal to or higher than the temperature T2 of the heat storage material 82a provided inside the heat storage 82. The heating medium is configured to flow into the vessel 82.

  For this reason, when the temperature T1 of the heat medium flowing inside the solar heat collector 80 is lower than the temperature T2 of the heat storage material 82a, the heat medium is prevented from flowing into the heat storage 82. . Therefore, the amount of heat stored in the heat accumulator 82 can be prevented from being taken away by the heat medium having a temperature lower than the temperature T2 of the heat storage material 82a.

  Therefore, a decrease in the amount of heat stored in the heat accumulator 82 can be suppressed, and the heat storage efficiency of the heat accumulator 82 can be improved.

  According to the solar heat storage system 300 of the present embodiment, it is possible to prevent the heat medium from flowing into the heat accumulator 82 immediately after the start of sunshine (sunrise) when the solar heat collector 80 can collect heat. For this reason, in the solar heat collector 80, the heat medium can flow into the heat accumulator 82 after the temperature T1 of the heat medium rises to the temperature T2 or more of the heat accumulator 82a.

  Therefore, the heat storage efficiency of the heat storage device 82 can be improved by flowing a heat medium having a temperature higher than the temperature T2 of the heat storage material 82a into the heat storage device 82.

  Further, in the solar heat storage system 300 of the present embodiment, the sun is hidden in the clouds while the solar heat collector 80 is collecting heat, or the solar heat collector 80 is shaded by an obstacle or the like. Even when the heat collection is temporarily disabled by being hidden, it can be suitably used.

  In the solar heat storage system 300 of the present embodiment, even if heat collection by the solar heat collector 80 is temporarily disabled, if the temperature T1 of the heat medium is higher than the temperature T2 of the heat storage material 82a, The medium flows into the heat accumulator 82.

  For this reason, the heat storage of 82 by the inflow of the heat medium becomes possible until the time immediately before the temperature T1 of the heat medium falls below the temperature T2 of the heat storage material 82a. Therefore, the heat storage efficiency of the heat accumulator 82 can be improved.

[Embodiment 4]
The following will describe another embodiment of the present invention with reference to FIGS. For convenience of explanation, members having the same functions as those described in the embodiment are given the same reference numerals, and descriptions thereof are omitted.

(Solar heat storage system 400)
FIG. 9 is a functional block diagram showing the configuration of the solar heat storage system 400 of the present embodiment.

  The solar heat storage system 400 includes a control device 4 (solar heat storage control device), a solar heat collector 80, an auxiliary heat source 81, a heat storage device 82, a pump 83, and a storage unit 90.

  In the present embodiment, the control device 4 includes an auxiliary heat source control unit 40 (auxiliary heat source control unit), a heat collection amount prediction unit 43 (predicted heat collection amount calculation unit), a demand heat amount prediction unit 14, an energy charge monitoring unit 15, and an insufficient heat amount. It functions as the calculation unit 23. Further, the auxiliary heat source control unit 40 functions as a supply availability determination unit 21 and a drive availability determination unit 42.

  The control device 4 of the present embodiment is similar to the control device 2 of the second embodiment in that (i) the heat collection amount prediction unit 13 is replaced with a heat collection amount prediction unit 43, and (ii) the drive availability determination unit 22 is a drive availability determination unit. This is a configuration realized by replacing with 42.

(Heat collection amount prediction unit 43)
The heat collection amount prediction unit 43 calculates the sunlight shortage heat amount and gives the value of the sunlight shortage heat amount to the drive availability determination unit 42. Only in this respect, the heat collection amount prediction unit 43 of the present embodiment is different from the heat collection amount prediction unit 13 of the first to third embodiments.

  Here, the solar shortage heat amount is a value of a difference between (i) the predicted solar heat collection amount and (ii) the value of the heat amount actually collected by the solar heat collector 80.

(Drivability determination unit 42)
The drive availability determination unit 42 according to the present embodiment has the same function as the drive availability determination unit 22 according to the second embodiment.

  The drive availability determination unit 42 of the present embodiment also has a function of controlling the operation of the auxiliary heat source 81 using the sunlight deficient heat amount given from the supply availability determination unit 21.

  The drive availability determination unit 42 refers to the sunlight shortage heat amount and determines whether the sunlight shortage heat amount is a negative value (that is, the predicted solar heat collection amount is actually collected by the solar heat collector 80). It is determined whether or not the value is below the value of heat.

  Subsequently, similarly to the drive availability determination unit 22, the drive availability determination unit 42 determines whether the predicted demand heat amount can be supplied only by the solar heat collector 80.

  When it is determined that the sunlight deficient heat amount is a negative value, the drive availability determination unit 42 determines whether the predicted demand heat amount can be supplied using the predicted solar heat collection amount. Then, the same operation as that of the drive availability determination unit 22 is performed. That is, the drive availability determination unit 42 can operate the auxiliary heat source 81 so as to compensate for the sunlight deficient heat amount.

  In addition, when the drivability determining unit 42 determines that the solar shortage heat amount is a positive value, the predicted demand heat amount can be supplied using the value of the heat amount actually collected by the solar heat collector 80. It is determined whether or not. Then, the same operation as that of the drive availability determination unit 22 is performed.

  When it is determined that the predicted demand heat quantity can be supplied, the drive availability determination unit 42 controls the auxiliary heat source 81 not to operate.

  On the other hand, when it is determined that the predicted demand heat quantity cannot be supplied, the drive availability determination unit 42 assists so as to reduce the amount of heat to be supplied by the auxiliary heat source 81 by the amount of sunlight shortage heat quantity. The heat source 81 is controlled. That is, the drive availability determination unit 42 performs control so as to shorten the operation time of the auxiliary heat source 81.

(Flow of heat storage process in solar heat storage system 400)
FIG. 10 is a flowchart illustrating the heat storage processing flow in the solar heat storage system 400.

  10 shows processes S51 to S66, but the processes other than the processes S54 to S58 and the process S66 are the same as the processes S11 to S20 of FIG. Hereinafter, with reference to FIG. 10, only the processes S54 to S58, the process S66, and the processes before and after that will be described.

  In the process S53, when it is determined that the predicted demand heat amount can be supplied only by the solar heat collector 80 (YES in the process S53), the drive availability determination unit 42 has a positive value for the solar shortage heat quantity. It is determined whether or not there is (process S54).

  If it is determined that the amount of sunlight deficient heat is a positive value (YES in process S54), the process proceeds to process S60.

  On the other hand, if it is determined that the amount of sunlight deficient heat is not a positive value (NO in process S54), the drivability determination unit 42 determines whether or not the predicted demand heat amount can be supplied only by the solar collector 80. Is determined (step S55). In the determination in step S55, the value of the amount of heat actually collected by the solar heat collector 80 is used.

  When it is determined that the predicted demand heat quantity can be supplied only by the solar heat collector 80 (YES in process S55), the process proceeds to process S61. When it is determined that the predicted demand heat quantity cannot be supplied only by the solar heat collector 80 (NO in process S55), the process proceeds to process S59 (see symbol (A) in FIG. 10).

  On the other hand, in the process S53, when it is determined that the predicted demand heat quantity cannot be supplied only by the solar heat collector 80 (NO in the process S53), the drive availability determination unit 42 has a negative value of the solar shortage heat quantity. It is determined whether or not (processing S56).

  When it is determined that the amount of sunlight deficient heat is a negative value (NO in process S54), the process proceeds to process S59.

  On the other hand, when it is determined that the solar shortage heat amount is not a negative value (YES in process S54), the drive availability determination unit 42 can supply the predicted demand heat amount only by the solar heat collector 80. Is determined (step S57). In the determination in step S57, the predicted solar heat collection amount is used.

  When it is determined that the predicted demand heat quantity can be supplied only by the solar heat collector 80 (YES in process S57), the process proceeds to process S61.

  On the other hand, when it is determined that the predicted demand heat quantity cannot be supplied only by the solar heat collector 80 (NO in process S57), the drive availability determination unit 42 determines the auxiliary heat source according to the value of the solar shortage heat quantity. Control is performed so as to shorten the operation time 81 (step S58). Then, the process proceeds to process S59.

  If it is determined in step S65 that heat storage has not been completed (NO in step S65), the heat collection amount prediction unit 43 reads the value of the amount of heat actually collected by the solar heat collector 80 again. (S66). Then, the heat collection amount prediction unit 43 updates the value of the sunlight deficient heat amount.

(More specific processing flow of heat storage in the solar heat storage system 400)
FIG. 11 is a flowchart illustrating more specifically the detailed flow of heat storage processing shown in FIG. 10. FIG. 11 shows a case where it is determined whether or not to operate the auxiliary heat source 81 at three timings before sunshine (before sunrise), during sunshine, and after sunshine (after sunset).

  11 shows the processes S71 to S101, the process of FIG. 11 is the same as that of FIG. 10 except that there are a plurality of timings for determining whether or not to operate the auxiliary heat source 81. It is the same as the processing.

  Processes S71 to S82 are processes of the solar heat storage system 400 before sunshine. Prior to sunshine, in steps S73 to S75, steps S77 to S78, and steps S79 to S81, it is determined whether or not the auxiliary heat source 81 is to be operated.

  Processes S83 to S97 and process S99 are processes of the solar heat storage system 400 during sunshine. During the sunshine, it is determined in steps S84 to S86 and steps S90 to S92 whether or not the auxiliary heat source 81 is to be operated.

  Process S98 and processes S100 to S101 are processes of the solar heat storage system 400 after sunshine. After sunshine, in process S98 process S100, it is determined whether or not the auxiliary heat source 81 is to be operated.

(Effect of solar heat storage system 400)
The solar heat storage system 400 of the present embodiment also uses the amount of sunlight deficient heat as a criterion for determining whether to operate the auxiliary heat source 81.

  Therefore, when the predicted solar heat collection amount is significantly different from the value of the heat amount actually collected by the solar collector 80 (that is, when the accuracy of prediction of the heat collection amount is not good), Moreover, there exists an effect that the running cost of the solar heat storage system 400 can be suppressed effectively.

  In particular, as shown in FIG. 11, there is an opportunity to adjust the operation of the auxiliary heat source 81 by providing the timing for determining whether or not to operate the auxiliary heat source 81 a plurality of times during the unit operation time. To increase. For this reason, the running cost of the solar heat storage system 400 can be suppressed more effectively.

[Embodiment 5]
The following will describe another embodiment of the present invention with reference to FIGS. For convenience of explanation, members having the same functions as those described in the embodiment are given the same reference numerals, and descriptions thereof are omitted.

(Solar heat storage system 500)
FIG. 12 is a functional block diagram showing the configuration of the solar heat storage system 500 of the present embodiment.

  The solar heat storage system 500 includes a control device 5 (solar heat storage control device), a solar heat collector 80, an auxiliary heat source 81, a heat storage device 82, a pump 83, a flow path switching valve 84, a thermometer 89a, a thermometer 89b, and a memory. Part 90 is provided.

  In the present embodiment, the control device 5 functions as the auxiliary heat source control unit 40, the heat collection amount prediction unit 43, the demand heat amount prediction unit 14, the energy rate monitoring unit 15, the insufficient heat amount calculation unit 23, and the flow path switching valve control unit 33. To do.

  The solar heat storage system 500 of this embodiment adds the flow path switching valve 84, the thermometer 89a, the thermometer 89b, and the flow path switching valve control unit 33 of the third embodiment to the solar heat storage system 400 of the fourth embodiment. It is the structure realized by.

  FIG. 13 is a flowchart illustrating the heat storage processing flow in the solar heat storage system 500. FIG. 13 shows processing S111 to S129.

  In FIG. 13, processes S122 to S124 are the same as the processes S37 to S39 of FIG. In FIG. 13, processes other than the processes S122 to S124 are the same as the processes S51 to S66 of FIG.

  That is, the processes S111 to S129 in FIG. 13 are realized by adding the processes S37 to S39 in FIG. 8 to the processes S51 to S66 in FIG. For this reason, a detailed description of the processing of FIG. 13 is omitted.

FIG. 14 is a flowchart illustrating more specifically the detailed flow of heat storage shown in FIG. 13. FIG. 13 shows processing S131 to S167.
FIG. 14 also shows determinations at three timings similar to those in FIG.

  14, processes S144 to S146 and processes S153 to S155 are the same processes as processes S122 to S124 of FIG. In FIG. 13, processes other than the processes S144 to S146 and the processes S153 to S155 are the same as the processes S71 to S101 of FIG. Therefore, a detailed description of the processing in FIG. 14 is also omitted.

(Effect of solar heat storage system 500)
The solar heat storage system 500 of the present embodiment is a combination of the solar heat storage system 300 of the third embodiment and the solar heat storage system 400 of the fourth embodiment.

  Therefore, according to the solar heat storage system 500 of the present embodiment, the effect of the solar heat storage system 300 of the third embodiment (improvement of heat storage efficiency) and the effect of the solar heat storage system 400 of the fourth embodiment (running cost characteristics) Has both effects.

[Modification]
In the solar heat storage systems 100 to 500, detailed weather forecast or solar radiation amount prediction information may be used for the calculation of the predicted solar heat collection amount in the heat collection amount prediction unit 13 or 43. Further, detailed weather forecast or solar radiation amount prediction information may be used in the same manner for calculating the predicted demand heat amount in the demand heat amount prediction unit 14.

  In addition, the said weather forecast or solar radiation amount prediction information may be acquired by the control apparatuses 1-5. The solar radiation amount prediction information may be calculated based on simple weather information (rough information such as whether the weather throughout the day is clear, cloudy, rainy, or snowy).

  On the other hand, when the solar radiation amount prediction information is calculated in detail, more detailed weather information (for example, a solar radiation rate for each hour or a solar radiation amount from a cloud movement at a certain point) is used. Good.

  As described above, using the detailed weather forecast or solar radiation amount prediction information, calculating the predicted solar heat collection amount in the heat collection amount prediction unit 13 or 43 and calculating the predicted demand heat amount in the demand heat amount prediction unit 14 respectively. Thus, the accuracy of the predicted solar heat collection amount and the predicted demand heat amount is further improved.

  For this reason, control of operation | movement of the auxiliary | assistant heat source 81 by the control apparatuses 1-5 can be performed with higher precision, and suppression of the running cost of the solar heat storage systems 100-500 is brought about.

In the solar heat storage systems 100 to 500, the calculation of the predicted solar heat collection amount in the heat collection amount prediction unit 13 or 43 and the calculation of the predicted demand heat amount in the demand heat amount prediction unit 14 include:
(I) Simple weather forecast details, or
(Ii) detailed weather forecast or solar radiation forecast information,
As well as any of the information
(Iii) Expected temperature, or
(Iv) Detailed demand heat quantity prediction information (necessary heat quantity),
Either piece of information may be used in combination.

  The demand heat quantity prediction information may be acquired from the outside of the solar heat storage systems 100 to 500, or may be selected from a pre-dataized list stored in the storage unit 90. The demand heat quantity prediction information is, for example, past performance data of the demand heat quantity.

  When selecting the demand heat quantity prediction information from the list, for example, when the heat demand is heating and the weather on the use day is sunny, the date (use date) and the weather information (sunny) are selected from the existing list. ) To select the amount of heat required for heating.

  In particular, when the predicted demand heat quantity is used as the demand heat quantity prediction information, the temperature information may be used for the calculation in the demand heat quantity prediction unit 14.

  The temperature information may be, for example, the predicted average temperature of the day as long as it is simple. Further, the temperature information is not limited to the predicted average temperature of the day, but may be information such as a predicted average temperature for every fixed time or a detailed temperature change prediction.

  In addition, when there is no information such as predicted average temperature for every fixed time or detailed temperature change prediction, the average of the same day (or the same month or the same time) for several years Temperature or the like may be used.

  As a result, the accuracy of the predicted solar heat collection amount and the predicted demand heat amount can be further improved, and the running cost of the solar heat storage systems 100 to 500 is further suppressed.

  Further, control information (such as a control plan) determined by an external information device or the like based on the above-described weather forecast or solar radiation amount prediction information may be given to the control devices 1 to 5. In this case, the control devices 1 to 5 may control the operations of the solar heat storage systems 100 to 500 according to the control information.

  Further, in the solar heat storage systems 100 to 500, the energy charge information 92 is an apartment (for example, an organization that is entrusted with determining an electric charge based on the power consumption in a condominium or a certain area where the solar heat storage system is installed). , Apartment management company), data center, cloud center, control plan base, or power management server.

  Further, in the solar heat storage systems 100 to 500, the weather information 91 and the energy by the home electric appliance (for example, TV, DVD, or BD (Blu-ray (registered trademark) Disc) recorder) in which the solar heat storage system is installed. The fee information 92 may be acquired.

  Note that a smart home appliance (for example, a refrigerator, an air conditioner, a rice cooker, or a microwave oven) having an information communication function may be used as the home appliance. The weather information 91 and the energy fee information 92 may be acquired by an information device (for example, a PC, a smartphone, a tablet terminal, or a game machine) that can communicate with the solar heat storage system.

  As the weather information 91, wind direction prediction information and wind speed prediction information may also be used. In order to improve the accuracy of calculation of the predicted demand heat quantity in the demand heat quantity prediction unit 14, it is preferable that the weather information 91 includes the outside air temperature prediction information.

  Further, in the solar heat storage systems 100 to 500, when the heat demand is heating, in addition to the weather information 91, the calculation of the predicted demand heat quantity in the demand heat quantity prediction unit 14 is performed for the building where the solar heat storage system is installed. It is preferable that heat insulation performance information indicating the heat insulation performance is also used.

This is because when the heat demand is heating, the following (A) to (C), that is,
(A) If the area where the solar heat storage system is installed is different, the standard value of the thermal insulation performance of the building may be different.
(B) Even if the area is the same, depending on the designer (or resident) of the building, the thermal insulation performance of the building may differ.
(C) Thermal insulation performance can vary depending on the size of the building,
This is because the possibility is assumed.

  As described above, by performing the calculation using the heat insulation performance information of the building, the accuracy of the predicted demand heat quantity can be further improved, and the running cost of the solar heat storage systems 100 to 500 is suppressed.

  The heat insulation performance information of the building may be a Q value indicating the standard heat insulation performance of the installation area, for example, as simple information. In addition, when more detailed data is required as the heat insulation performance information of a building, the heat insulation performance information may be calculated using, for example, the heat insulation characteristics (thermal resistance value) of a building member.

  When the detailed total floor area of the building is already known, the demand heat quantity prediction unit 14 may calculate the predicted demand heat quantity using the value of the total floor area.

  When the detailed total floor area of the building is not known (for example, before the detailed design of the building is started), the demand heat quantity prediction unit 14 uses the average total floor area of the building. Calculation of the predicted demand heat quantity in may be performed.

  Moreover, in the solar heat storage systems 100-500, the heat storage device 82 may be arrange | positioned in the tank which improved heat insulation. In this case, according to the heating demand, the amount of heat stored in the heat accumulator 82 may be supplied to the heating usage location as needed.

  In addition, the heat storage material 82 a provided inside the heat storage device 82 is preferably a material having high heat insulation properties in order to suppress the release of the amount of heat stored in the heat storage device 82. For example, the heat storage material 82a may be any of a sensible heat material, a latent heat material, or a chemical heat storage material.

  In particular, by using a heat storage material as the heat storage material 82a, heat storage by the heat storage material 82a is possible so that a certain temperature required when using heat is maintained.

  Moreover, under a constant temperature condition, the latent heat material generally has a larger amount of heat that can be stored than the sensible heat material. Further, since the latent heat material has a relatively high heat storage density, there is also an advantage that the arrangement space for the heat storage material 82a can be reduced.

  Furthermore, although the latent heat material has a smaller heat storage amount than the chemical heat storage material, it is more suitable for heating applications in that it can store heat so that a constant temperature is maintained.

  Further, the latent heat material generally has an advantage of high safety. For this reason, the latent heat material is easier to apply to, for example, a regenerator 82 provided in a solar heat storage system for a house than a chemical heat storage material that requires safety due to chemical changes during heat dissipation. I can say that.

  Some latent heat materials are designated as “non-toxic non-combustible materials”. Some latent heat materials are designated as “non-hazardous materials and designated combustible materials” even if they are combustible materials, and can be handled in the same manner as wood. Also in this respect, it can be said that the latent heat material is easier to apply to the heat accumulator 82.

[Example of software implementation]
The control blocks (particularly, the control devices 1 to 5) of the solar heat storage systems 100 to 500 may be realized by a logic circuit (hardware) formed in an integrated circuit (IC chip) or the like, or software using a CPU. It may be realized by.

  In the latter case, the solar heat storage systems 100 to 500 include a CPU that executes instructions of a program that is software that realizes each function, and a ROM (Read Only) in which the program and various data are recorded so as to be readable by the computer (or CPU). Memory) or a storage device (these are referred to as “recording media”), a RAM (Random Access Memory) for expanding the program, and the like. And the objective of this invention is achieved when a computer (or CPU) reads the said program from the said recording medium and runs it. As the recording medium, a “non-temporary tangible medium” such as a tape, a disk, a card, a semiconductor memory, a programmable logic circuit, or the like can be used. The program may be supplied to the computer via an arbitrary transmission medium (such as a communication network or a broadcast wave) that can transmit the program. The present invention can also be realized in the form of a data signal embedded in a carrier wave in which the program is embodied by electronic transmission.

[Summary]
A solar heat storage control device (control device 1) according to aspect 1 of the present invention includes a solar heat collector (80), a heat storage device (82a) that stores heat energy collected by the solar heat collector in a heat storage material (82a). ), And a solar heat storage control device that controls a solar heat storage system including an auxiliary heat source (81) that adds thermal energy to the heat storage material, and predicts the amount of heat collected in the solar heat collector by a predetermined time Predicted heat collection amount calculation means (heat collection amount prediction unit 13) for calculating a predicted solar heat collection amount that is a value, and prediction for calculating a predicted demand heat amount that is a predicted value of the amount of heat to be supplied to the heat accumulator by the predetermined time Demand heat quantity calculation means (demand heat quantity prediction section 14), energy charge monitoring means (energy charge monitoring section 15) for monitoring a charge per unit quantity of energy necessary for operating the auxiliary heat source, and the above If measuring demand heat exceeds the predicted solar collector heat, when the fee is below the predetermined amount, and a supplementary heat source control means for operating the auxiliary heat source (auxiliary heat source control unit 10), the.

  According to the above configuration, in the case where it is predicted that the amount of heat demand cannot be supplied only by the heat collection by the solar heat collector, the auxiliary heat source is only in the time zone (for example, at night) when the energy fee is low. Can be operated.

  Therefore, even if it is a case where an energy rate fluctuates temporally, there exists an effect that the running cost of a solar heat storage system provided with a solar heat collector, a regenerator, and an auxiliary heat source can be controlled.

  Further, in the solar heat storage control device according to aspect 2 of the present invention, in the aspect 1, the predicted heat collection amount calculation means periodically calculates the predicted solar heat collection amount, and the predicted solar heat collection amount and the prediction are calculated. It further includes a difference calculation means (deficient heat amount calculation unit 23) that periodically calculates a difference from the demand heat quantity, and the auxiliary heat source control means uses the latest difference calculated by the difference calculation means to change the auxiliary heat source. It is preferable to operate.

  According to said structure, whenever the newest difference is calculated, it becomes possible to correct | amend the system control of a solar thermal storage system at any time. In particular, when the difference increases, the increase can be compensated by operating the auxiliary heat source during the operation permission time zone.

  For this reason, there exists an effect that the running cost of a solar heat storage system can be controlled more effectively.

Moreover, the solar heat storage control apparatus which concerns on aspect 3 of this invention is the said aspect 1 or 2,
The solar heat storage system is provided with a bypass (flow path switching valve 84) for returning the heat medium heated by the solar heat collector to the solar heat collector without circulating it to the heat accumulator. And
When the temperature (T1) of the heat medium in the solar heat collector is lower than the temperature (T2) of the heat storage material, the flow path switching means (flow path switching valve control unit) causes the heat medium to flow into the bypass. 33).

  According to said structure, it can prevent that the calorie | heat amount stored in the thermal accumulator is taken away with the heat medium lower temperature than the temperature of a thermal storage material. For this reason, there exists an effect that the thermal storage efficiency of the thermal storage device in a solar thermal storage system can be improved.

  Moreover, the solar heat storage control apparatus which concerns on aspect 4 of this invention is any one of the said aspects 1-3. WHEREIN: The said auxiliary | assistant heat source control means is the said sunlight by the said estimated solar heat collecting amount and the said predetermined time. It is preferable to calculate the difference from the amount of heat collected by the heat collector, and to operate the auxiliary heat source so as to compensate for the difference when the predicted solar heat collection amount is smaller than the heat amount.

  According to the above configuration, when the predicted solar heat collection amount is significantly smaller than the value of the heat amount actually collected in the solar collector (that is, when the accuracy of the heat collection amount prediction is not good). Even so, the running cost of the solar heat storage system can be effectively suppressed.

  Moreover, the solar heat storage control apparatus according to aspect 5 of the present invention is the solar heat storage control device according to any one of the aspects 1 to 4, wherein the predicted heat collection amount calculation means includes: a weather forecast, a solar radiation amount prediction information, an estimated temperature, and a demand heat amount. It is preferable to calculate the predicted solar heat collection amount using at least one of past performance data.

  According to said structure, there exists an effect that the precision of estimated solar heat collection amount can be improved further, and the running cost of a solar heat storage system can further be suppressed.

  Moreover, the solar heat storage control apparatus which concerns on aspect 6 of this invention WHEREIN: In any one of the said aspects 1-5, the said predicted demand heat amount calculation means is a weather forecast, solar radiation amount prediction information, predicted temperature, and a demand heat amount. It is preferable to calculate the predicted demand heat quantity using at least one of past performance data.

  According to said structure, there exists an effect that the precision of prediction demand calorie | heat amount can be improved further and the running cost of a solar heat storage system can further be suppressed.

  Moreover, the solar heat storage control apparatus which concerns on aspect 7 of this invention is the said predicted demand heat amount using the information which shows the heat insulation performance of a building in any one of the said aspects 1 to 6, the said predicted demand heat amount calculation means. Is preferably calculated.

  According to said structure, there exists an effect that the precision of prediction demand calorie | heat amount can be improved further and the running cost of a solar heat storage system can further be suppressed.

  In the solar heat storage control device according to aspect 8 of the present invention, in any one of the above aspects 1 to 7, the heat storage material is preferably a latent heat material.

  According to said structure, there exists an effect that the thermal storage material especially suitable for a heating use can be implement | achieved.

  Moreover, the solar heat storage control apparatus which concerns on aspect 9 of this invention WHEREIN: In any one of the said aspects 1-8, it is preferable that the said charge is an electricity charge.

  According to said structure, there exists an effect that the running cost of a solar heat storage system can further be suppressed according to the fluctuation | variation of the electricity bill for every various time slot | zones (for example, midnight, daytime, and night).

  Moreover, the solar heat storage system which concerns on aspect 10 of this invention is the thermal energy which the solar thermal storage control apparatus which concerns on any one of the said aspects 1-9, a solar collector, and the said solar collector collected. A heat accumulator for storing heat in the heat storage material, an auxiliary heat source for adding heat energy to the heat storage material, and a pump for sending the heat medium heated by the solar heat collector to the heat storage device Is preferred.

  According to said structure, there exists an effect that the solar heat storage system which can suppress running cost is realizable.

  Moreover, the solar heat storage system which concerns on aspect 11 of this invention is for returning to the said solar heat collector, without circulating the heat medium heated by the said solar heat collector in the said aspect 10, to the said heat storage. A bypass, a first thermometer (thermometer 89a) for measuring the temperature of the heating medium flowing through the solar collector, and a second thermometer (thermometer 89b) for measuring the temperature of the heat storage material; Are preferably further provided.

  According to said structure, in addition to suppression of running cost, there exists an effect that the solar heat storage system which can also improve heat storage efficiency is realizable.

  In addition, the solar heat storage control device according to each aspect of the present invention may be realized by a computer. In this case, the solar heat storage system control device is operated by operating the computer as each unit included in the solar heat storage control device. A control program for a solar heat storage control device that realizes the above in a computer and a computer-readable recording medium that records the control program also fall within the scope of the present invention.

[Additional Notes]
The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention. Furthermore, a new technical feature can be formed by combining the technical means disclosed in each embodiment.

  The present invention can also be expressed as follows.

That is, the solar heat storage system controller according to one aspect of the present invention is a solar heat storage system controller that controls a solar heat storage supply system including a solar heat collector, a heat storage, and an auxiliary heat source, and the solar heat collector A heat collection heat storage unit for storing the amount of solar heat collected by
An expected demand heat amount calculation unit for calculating an expected demand heat amount to be supplied to the regenerator from weather data, an energy rate storage unit for monitoring fluctuations in energy rate, and an auxiliary heat source control unit for controlling the operation of the auxiliary heat source; The auxiliary heat source control unit obtains the solar heat collection heat amount from the heat collection heat amount storage unit, the predicted demand heat amount from the predicted demand heat amount calculation unit, and the energy rate information from the energy rate monitoring unit. When it is determined whether it is possible to supply the amount of heat to be supplied to the regenerator only by solar heat, and when it is determined that supply is possible, control is performed not to operate the auxiliary heat source, and when it is determined that supply is not possible Operates the auxiliary heat source only during a time period when the energy fee is lower than a predetermined amount.

  Moreover, the solar heat storage system controller which concerns on 1 aspect of this invention is provided with the insufficient heat amount calculating part which calculates the said insufficient heat amount of the said heat collection amount with respect to the said estimated demand heat amount.

  Moreover, the solar heat storage system controller which concerns on 1 aspect of this invention WHEREIN: The said solar heat storage system is provided with the pipe which flows a heat medium to the said solar heat collector, the said heat collector, and the said auxiliary heat source, The said solar heat collection system The storage device includes a first thermometer that measures the temperature of the heat medium flowing through the solar collector, and the heat storage device includes a second thermometer that measures the temperature of the heat storage material included in the heat storage device. The pipe includes a flow path switching valve for switching the flow of the heat medium, and the solar heat storage system controller includes a temperature T1 measured by the first thermometer and a temperature T2 measured by the second thermometer. When T1 is lower than T2, a flow path switching valve control unit that performs control not to transport the heat medium to the heat accumulator is provided.

  Moreover, the solar heat storage system which concerns on 1 aspect of this invention was arrange | positioned between the controller which concerns on the above-mentioned 1 aspect, a solar heat collector, a heat storage device, the said solar heat collector, and the said heat storage device. An auxiliary heat source, a heat medium that collects solar heat and transfers the heat to the heat accumulator, and a pump that circulates the heat medium, and the controller determines an insufficient amount of solar heat collection relative to the heat demand. However, the auxiliary heat source is operated during an inexpensive time period to store heat in the heat accumulator.

  Moreover, the solar heat storage system which concerns on 1 aspect of this invention was arrange | positioned between the controller which concerns on the above-mentioned 1 aspect, a solar heat collector, a thermal storage device, the solar thermal collector, and the said thermal storage device. An auxiliary heat source, a heat medium that collects solar heat and transfers the heat to the regenerator, a pump that circulates the heat medium, and at least one first heat medium temperature that measures the heat medium temperature at the outlet of the solar heat collector A thermometer, at least one second thermometer that measures the temperature of the heat storage material of the heat storage device, a flow path switching valve that is disposed in front of the heat storage device and controls the inflow of the heat medium to the heat storage device, The controller stores the shortage of the solar heat collection amount with respect to the heat demand by operating the auxiliary heat source in a time zone where the energy fee is low and storing the heat in the heat accumulator, and the controller stores the heat medium temperature and the heat medium temperature. When the heat storage material temperature is compared and the heat medium temperature is higher than the heat storage material temperature, The medium is transported to a heat accumulator, and when the heat medium temperature is lower than the heat accumulator temperature, the flow path of the heat medium is switched so that the heat medium is heated by solar heat without being transported to the heat accumulator. Perform such control.

  The present invention can be used for a solar heat storage control device and a solar heat storage system.

1, 2, 3, 4, 5 Control device (solar heat storage control device)
10, 20, 30, 40 Auxiliary heat source control unit (auxiliary heat source control means)
13, 43 Heat collection amount prediction unit (predicted heat collection amount calculation means)
14 Demand heat quantity prediction part (Predicted demand heat quantity calculation means)
15 Energy rate monitoring unit (energy rate monitoring means)
23 Insufficient heat quantity calculation unit (difference calculation means)
33 Channel switching valve controller (channel switching means)
80 Solar collector 81 Auxiliary heat source 82 Heat storage device 82a Heat storage material 84 Channel switching valve (bypass)
89a Thermometer (first thermometer)
89b Thermometer (second thermometer)
100, 200, 300, 400, 500 Solar heat storage system T1 Temperature of heat medium T2 Temperature of heat storage material

Claims (5)

A solar heat storage control device that controls a solar heat storage system including a solar heat collector, a heat storage that stores heat energy collected by the solar heat collector in a heat storage material, and an auxiliary heat source that adds heat energy to the heat storage material. There,
A predicted heat collection amount calculating means for calculating a predicted solar heat collection amount that is a predicted value of the heat amount collected in the solar heat collector by a predetermined time;
A predicted demand heat amount calculating means for calculating a predicted demand heat amount that is a predicted value of the heat amount to be supplied to the regenerator by the predetermined time;
Energy charge monitoring means for monitoring a charge per unit amount of energy required to operate the auxiliary heat source;
An auxiliary heat source control means for operating the auxiliary heat source when the estimated amount of heat demand exceeds the estimated amount of solar heat collected, and the charge is equal to or less than a predetermined amount; . The predicted heat collection amount calculation means periodically calculates the predicted solar heat collection amount,
A difference calculating means for periodically calculating a difference between the predicted solar heat collection amount and the predicted demand heat amount;
The solar heat storage control device according to claim 1, wherein the auxiliary heat source control means operates the auxiliary heat source by using the latest difference calculated by the difference calculation means. The solar heat storage system is provided with a bypass for returning the heat medium heated by the solar heat collector to the solar heat collector without circulating it to the heat storage device,
The flow path switching means for allowing the heat medium to flow into the bypass is provided when the temperature of the heat medium in the solar heat collector is lower than the temperature of the heat storage material. 2. The solar heat storage control device according to 2. The solar heat storage control device according to any one of claims 1 to 3,
A solar collector,
A heat accumulator for storing the thermal energy collected by the solar heat collector in a heat storage material;
An auxiliary heat source for adding thermal energy to the heat storage material;
A solar heat storage system comprising: a pump for sending the heat medium heated by the solar heat collector to the heat accumulator.   A control program for causing a computer to function as the solar heat storage control device according to any one of claims 1 to 3, wherein the control program causes the computer to function as each of the above means.

Images