JP4933983B2 - Thermal storage and heat dissipation system - Google Patents

Description

  The present invention relates to a heat storage tank that stores heat storage water, a heat storage water circulation means that circulates the heat storage water taken out from the heat storage tank in a circulation path and returns the heat storage water to the heat storage tank, and an exhaust heat transport that transports the exhaust heat of the heat supply device Heat storage heat dissipation provided with an exhaust heat exchanger that heats the heat storage water flowing through the circulation path with a fluid, and a heat dissipation heat exchanger that dissipates the heat storage water after passing through the exhaust heat exchanger About the system.

  In the heat storage heat dissipation system as described above, the heat storage water is heated by heat exchange between the heat storage water and the exhaust heat carrier fluid in the exhaust heat exchanger, and the heated heat storage water is returned to the heat storage tank to return the heat storage device. The waste heat is stored in the heat storage tank. Heat storage water in a heat storage tank or heat storage water heated by an exhaust heat exchanger is supplied to a heat dissipation heat exchanger to dissipate the heat storage water, and the released heat is used for hot water supply or heating. Thus, when performing hot water supply, heating, etc., the energy efficiency is improved by utilizing the exhaust heat of the heat supply device.

  When supplying the heat storage water to the heat dissipation heat exchanger, it is required to supply the heat storage water at the temperature required by the heat dissipation heat exchanger in order to properly perform heat dissipation in the heat dissipation heat exchanger. It is done. However, there are cases where the heat storage water in the heat storage tank does not reach the required temperature, or even if it is heated by the exhaust heat exchanger, it does not reach the required temperature. Therefore, in the conventional heat storage and heat dissipation system, an auxiliary heating device for heating the heat storage water after passing through the exhaust heat exchanger is provided, and the heat storage water circulation means discharges the entire amount of the heat storage water taken out from the heat storage tank to the circulation path. A heat heat exchanger, an auxiliary heating device, and a heat dissipation heat exchanger are sequentially supplied. The auxiliary heating device heats the heat storage water to a temperature required by the heat dissipation heat exchanger, and supplies the heated heat storage water to the heat dissipation heat exchanger (see, for example, Patent Document 1). .

JP 2004-264011 A

  In the heat storage and heat dissipation system as described above, various devices such as a waste heat exchanger, heat dissipation heat exchanger, auxiliary heating device, and heat storage water circulation means are stored in a storage body, and usually the storage body is installed outdoors. is doing. Therefore, for example, in the winter season and the like, the amount of heat radiation in each device increases and the heat radiation loss increases, so it is required to suppress this heat radiation loss.

  In order to suppress heat dissipation loss, by storing each device in a heat insulating space covered with a heat insulating material, etc., all devices are stored in a heat insulating space that suppresses heat dissipation with a heat insulating material. It is conceivable to provide. However, storing each of all the devices in the heat insulation space increases the burden on the work surface and the cost. In addition, for example, when a combustion type that heats stored water by combustion of a gas burner is applied as an auxiliary heating device, the auxiliary heating device is insulated while enabling intake of combustion air and exhaust of combustion gas. It is necessary to store in the space, and it is difficult to provide the auxiliary heating device in a heat insulating state.

Therefore, it is conceivable that the auxiliary heating device is provided in a non-insulated state that allows heat dissipation, and other devices are accommodated in a heat-insulating space and provided in a heat-insulated state, but the following problems occur.
In the above conventional heat storage and heat dissipation system, even when the heat storage water is not heated by the auxiliary heating device, the heat storage water circulation means removes the total amount of the heat storage water taken out from the heat storage tank into the circulation path, the exhaust heat exchanger, the auxiliary heating device And sequentially supply to the heat exchanger for heat dissipation. Therefore, even when the waste heat from the heat supply device is stored in the heat storage tank or when the heat storage water is radiated by the heat exchanger for heat dissipation, the heat storage water dissipates in the auxiliary heating device and the heat dissipation loss increases. .

  By the way, in the heat storage and heat dissipation system described in Patent Document 1, based on the actual heat load of how much heat load was used in what time zone of the past day, how much in what time zone of the future day The heat load is stored in the heat storage tank so as to satisfy the predicted heat load. In this way, by storing only the amount of heat predicted to be necessary in the heat storage tank, it is possible to prevent the heat storage tank from storing more heat than necessary, and to reduce heat dissipation loss. However, since the time zone in which hot water supply or heating is used or the amount of heat required for hot water supply or heating changes every day, the predicted heat load may be insufficient or conversely excessive with respect to the required amount of heat. When the predicted heat load is insufficient, the auxiliary heating device is operated to heat the heat storage water, so that the exhaust heat of the heat supply device cannot be used effectively, and the energy efficiency may be reduced. When the predicted heat load becomes excessive, an excessive amount of heat is stored in the heat storage tank, and the heat is dissipated wastefully, which may reduce energy efficiency.

  The present invention has been made paying attention to such points, and its purpose is to provide a heat storage and heat dissipation system capable of suppressing heat dissipation loss while reducing the work surface and the cost when heat insulating each device. There is in point to do.

  In order to achieve this object, the characteristic configuration of the heat storage and heat dissipation system according to the present invention includes a heat storage tank that stores the heat storage water, and a heat storage tank that circulates the heat storage water extracted from the heat storage tank and returns it to the heat storage tank. Water circulation means, a waste heat heat exchanger that heats the heat storage water flowing through the circulation path with a waste heat carrier fluid that conveys waste heat of the heat supply device, and heat storage after passing through the waste heat heat exchanger A heat storage and heat dissipation system provided with a heat dissipation heat exchanger for radiating water, wherein the heat storage water taken out from the heat storage tank to the circulation path is bypassed by the exhaust heat exchanger and the heat dissipation heat exchanger An exhaust heat heat exchanger bypass path to be supplied to the exhaust heat exchanger, a supply state switching means switchable between a supply state in which the heat storage water is supplied to the exhaust heat exchanger bypass path and a non-supply state in which the heat storage water is not supplied, For heating the heat storage water flowing through the bypass path The auxiliary heating device is provided with a heating device and an operation control means for controlling the circulation state of the heat storage water by switching the supply state switching means between the supply state and the non-supply state, and controlling the operation of the auxiliary heating device. Is provided in a non-adiabatic state that allows heat dissipation, and the heat storage tank, the circulation path, the heat storage water circulation means, the exhaust heat exchanger, and the heat dissipation heat exchanger are radiated by a heat insulating material. It is in the point provided in the heat insulation state accommodated in the heat insulation space which suppresses.

According to this configuration, the heat storage tank, the circulation path, the heat storage water circulation means, the exhaust heat exchanger, and the heat dissipation heat exchanger are housed in the heat insulation space and provided in a heat insulation state, but the auxiliary heating device is in a non-heat insulation state. Therefore, it is not necessary to house all the devices in the heat insulating space and provide them in a heat insulating state, and the burden on the work surface and the cost can be reduced. In addition, since the auxiliary heating device is provided in a non-adiabatic state, for example, even when a combustion type is used as the auxiliary heating device, the auxiliary heating device can perform intake of combustion air and exhaust of combustion gas. Is not required to be stored in the heat insulating space, and the burden on the work surface and the cost can be effectively reduced. Moreover, since it can be accommodated and insulated in the heat insulation space including the piping etc. which connect each apparatus, a heat dissipation loss can be suppressed markedly conventionally.
By switching the supply state switching means to the non-supply state, the operation control means sequentially supplies the heat storage water taken out from the heat storage tank to the exhaust heat exchanger and the heat dissipation heat exchanger without supplying it to the auxiliary heating device. be able to. Therefore, when the waste heat from the heat supply device is stored in the heat storage tank or when heat storage water is radiated by the heat dissipation heat exchanger, the heat storage water is not supplied to the non-insulated auxiliary heating device, and the heat dissipation loss Can be suppressed.
In this way, it is possible to realize a reduction in heat dissipation while reducing the work surface and the cost when heat insulating each device.

  The heat storage radiating system according to the present invention is further characterized in that the heat storage tank is open to the atmosphere and formed in a rectangular shape in plan view, and the heat insulating space is a rectangular short side of the heat storage tank. The heat insulating material is provided in a state of covering the outer peripheral portion of the heat storage tank and the heat insulating space.

  According to this configuration, the heat storage tank is not an airtight type that requires strong strength, but is an air release type with the upper part being open to the atmosphere. The shape can be simplified as a rectangular shape in plan view. When installing the heat storage tank, the circulation path, the heat storage water circulation means, the exhaust heat exchanger, and the heat exchanger for heat radiation in a heat-insulated state, both the heat storage tank and the heat insulating space have a simple rectangular shape in plan view. Only a simple work of covering the outer periphery of the heat storage tank and the heat insulation space with the heat insulating material is required, and the burden on the work surface can be effectively reduced. And since the heat insulation space is provided in the side part corresponding to the rectangular short side of a heat storage tank, rather than providing in the side part corresponding to the rectangular long side of a heat storage tank, a heat storage tank and heat insulation space are The opposing area can be reduced, and heat dissipation loss between the heat storage tank and the heat insulation space can be reduced.

  According to a further feature of the heat storage and heat dissipation system according to the present invention, the auxiliary heating device and the heat insulating space are arranged in a state of being vertically aligned in a side surface corresponding to a rectangular short side of the heat storage tank. In the point.

  According to this configuration, the auxiliary heating device and the heat insulating space can be arranged vertically and compactly while effectively utilizing the space in the side surface corresponding to the rectangular short side of the heat storage tank. Therefore, the installation space can be made compact as a heat storage and heat dissipation system.

  According to a further feature of the heat storage and heat dissipation system according to the present invention, the heat storage tank is configured such that the area of the interface portion between the stored heat storage water and the atmosphere is smaller than the cross-sectional area of the portion other than the interface portion. There is in point.

  According to this configuration, in the heat storage tank, the evaporation of the heat storage water can be suppressed by reducing the area of the interface portion between the heat storage water and the atmosphere. Therefore, the heat dissipation loss due to the evaporation of the heat storage water in the heat storage tank can be suppressed.

  A further characteristic configuration of the heat storage and heat dissipation system according to the present invention is such that the heat storage water circulation means is configured to take out the heat storage water from the upper part of the heat storage tank and return the heat storage water to the lower part of the heat storage tank, and The control means switches the supply state switching means to a non-supply state and stores the exhaust heat of the heat supply device in the heat storage tank to store the heat in the heat storage tank, and sets the supply state switch means to a supply state or a non-supply state. It is the point which is comprised so that it may switch and may perform the thermal radiation operation which thermally radiates thermal storage water with the said heat exchanger for thermal radiation.

According to this configuration, when the operation control means performs the exhaust heat storage operation, the heat storage water taken out from the upper part of the heat storage tank is heated by the exhaust heat exchanger, and the heated high-temperature heat storage water is converted into the lower part of the heat storage tank. By returning to, the heat storage water stored in the heat storage tank can be stored while raising the temperature as a whole. Therefore, when managing the amount of heat stored in the heat storage tank, it is not necessary to provide temperature sensors at each of a plurality of locations (for example, five locations) on the side surface of the heat storage tank. The amount can be easily and easily managed. Moreover, in the exhaust heat storage operation, the operation control means switches the supply state switching means to the non-supply state, so heat storage water is not supplied to the auxiliary heating device, and heat storage in the heat storage tank can be performed while suppressing heat dissipation loss. it can.
In heat radiation operation, when the heat storage water is not heated by the auxiliary heating device, the operation control means switches the supply state switching means to the supply state when the heat storage water at the temperature required by the heat dissipation heat exchanger cannot be supplied. Thereby, the heat storage water can be heated by the auxiliary heating device, and the heat storage water at the temperature required by the heat exchanger for heat radiation can be supplied. Conversely, when the heat storage water at the temperature required by the heat radiating heat exchanger can be supplied without heating the heat storage water by the auxiliary heating device, the operation control means switches the supply state switching means to the non-supply state. Thus, heat storage loss can be suppressed without supplying heat storage water to the auxiliary heating device.

  According to a further feature of the heat storage and heat dissipation system according to the present invention, the operation control means switches the supply state when the heat storage water taken out from the heat storage tank to the circulation path is below the auxiliary heating start temperature in the heat dissipation operation. The means is switched to the supply state, the operation of the auxiliary heating device is started, and the supply state switching means is switched to the non-supply state when the heat storage water taken out from the heat storage tank to the circulation path becomes equal to or higher than the auxiliary heating stop temperature. At the same time, the operation of the auxiliary heating device is stopped.

  For example, when the temperature of the heat storage water taken out from the heat storage tank to the circulation path is low, the heat storage water at the temperature required by the heat exchanger for heat radiation cannot be supplied unless the heat storage water is heated by the auxiliary heating device. On the contrary, when the temperature of the heat storage water taken out from the heat storage tank to the circulation path is high, the heat storage water at the temperature required by the heat exchanger for heat radiation can be supplied without heating the heat storage water with the auxiliary heating device. . In this way, whether or not the heat storage water should be heated by the auxiliary heating device in order to supply the heat storage water at the temperature required by the heat exchanger for heat radiation depends on the temperature of the heat storage water taken out from the heat storage tank to the circulation path. I can decide. Utilizing this, the condition for starting the operation at the rated output of the auxiliary heating device by switching the supply state switching means to the supply state is such that the heat storage water taken out from the heat storage tank to the circulation path is below the auxiliary heating start temperature. As a condition for switching the supply state switching means to the non-supply state and stopping the operation of the auxiliary heating device, the heat storage water taken out from the heat storage tank to the circulation path is equal to or higher than the auxiliary heating stop temperature. Accordingly, when the heat storage water is to be heated by the auxiliary heating device, the heat storage water is heated by the auxiliary heating device, and when it is not necessary to heat the heat storage water by the auxiliary heating device, the heat storage water is not supplied to the auxiliary heating device. Heat dissipation loss can be suppressed.

  A further characteristic configuration of the heat storage and heat dissipation system according to the present invention is provided with a low-output operation prevention function that prevents the auxiliary heating device from operating at a low output by operating the auxiliary heating device at an output higher than a predetermined output. It is in the point letting you.

  In operating the auxiliary heating device, for example, in the combustion type, if the operation is performed at a low output, the air becomes excessive and the thermal efficiency of the auxiliary heating device itself is lowered. Therefore, in the present invention, by providing the auxiliary heating device with a low output operation prevention function, the flow rate of the heat storage water flowing to the auxiliary heating device side is secured, and the auxiliary heating device is operated at an output of a predetermined output or more. Thus, it is possible to suppress a decrease in the thermal efficiency of the auxiliary heating device itself and to improve the energy efficiency. Moreover, the heat storage water heated by the auxiliary heating device with an output equal to or higher than a predetermined output is supplied to the heat exchanger for heat dissipation and then returned to the heat storage tank. Therefore, the heat generated by the auxiliary heating device can be used not only for heating such as hot water supply or heating in the heat-dissipating heat exchanger, but can also be stored in the heat storage tank. As a result, not only the exhaust heat of the heat supply device but also the heat generated by the auxiliary heating device can be used effectively while accumulating heat, heating, etc., and further improving energy efficiency Can do. Moreover, not only the exhaust heat of the heat supply device but also the heat generated by the auxiliary heating device can be stored in the heat storage tank, and the heat stored in the heat storage tank can be increased to a greater amount of heat because the heat release can be suppressed. Can keep. Therefore, for example, when the hot water supply or heating is performed, the heat storage amount necessary for that can be stored in the heat storage tank, and it is necessary to store the heat in the heat storage tank before the time of hot water supply or heating. Disappear.

  According to a further characteristic configuration of the heat storage and heat dissipation system according to the present invention, the operation control unit manages time-series power load, and the heat storage water taken out from the heat storage tank to the circulation path in a time zone when the power load increases. When the exhaust heat storage start temperature or lower, the exhaust heat storage operation is performed, and when the power load decreases during the exhaust heat storage operation, the heat storage is performed in order to increase the flow rate of the heat storage water supplied to the exhaust heat exchanger. The water circulating means is configured to operate.

  For example, when a heat and power cogeneration device that generates heat and electric power is used as the heat supply device, the heat storage water that the operation control means takes out from the heat storage tank to the circulation path in the time zone when the power load increases is the waste heat heat storage. When exhaust heat storage operation is performed by lowering the start temperature or less, the heat generated by the combined heat and power supply device can be stored in the heat storage tank while the power generated by the combined heat and power supply device can be applied to the power load. Efficiency can be improved. Furthermore, according to this configuration, the operation control means not only performs the exhaust heat storage operation, but also reduces the flow rate of the stored heat water supplied to the exhaust heat exchanger when the power load decreases during the exhaust heat storage operation. The heat storage water circulation means is operated so as to increase. Thus, by increasing the flow rate of the heat storage water supplied to the exhaust heat exchanger, the speed at which heat is stored in the heat storage tank can be increased, and the heat storage in the heat storage tank can be terminated early. Moreover, since the heat storage water circulation means can be operated so as to increase the flow rate of the heat storage water supplied to the exhaust heat exchanger by using the surplus power due to the decrease in the power load, a combined heat and power supply device is generated. Electric power can be used more effectively.

  The further characteristic structure of the thermal storage heat dissipation system which concerns on this invention is comprised so that the said operation control means may perform the said waste heat thermal storage operation so that the thermal storage amount of the said thermal storage tank may be maintained more than predetermined | prescribed thermal storage amount. In the point.

  According to this configuration, the heat storage amount of the heat storage tank can be maintained at a predetermined heat storage amount or more, so when performing hot water supply, heating, etc., the heat for heat radiation can be obtained without heating the heat storage water with the auxiliary heating device. Heat storage water at a temperature required by the exchanger can be supplied. Therefore, if the heat storage water is not heated by the auxiliary heating device, it is possible to avoid as much as possible that the heat storage water having the temperature required by the heat radiating heat exchanger cannot be supplied. Therefore, without operating the auxiliary heating device as much as possible, hot water supply or heating can be performed while utilizing the exhaust heat of the heat supply device, and energy efficiency can be effectively improved.

An embodiment of a heat storage and heat dissipation system according to the present invention will be described with reference to the drawings.
As shown in FIGS. 1, 3, and 4, this heat storage and heat dissipation system circulates in a circulation path 2 through a heat storage tank 1 that stores water as the heat storage water A <b> 1 and the heat storage water A <b> 1 extracted from the heat storage tank 1. Heat storage water circulation means 3 is provided for returning to the heat storage tank 1. In the circulation path 2, an exhaust heat exchanger 5 that heats the heat storage water A <b> 1 that flows through the circulation path 2 using an exhaust heat transfer fluid that transfers the exhaust heat of the heat supply device 4, and the exhaust heat exchanger thereof The heat-dissipating heat exchanger 6 that dissipates the heat storage water A <b> 1 after passing through 5 is provided.
In FIG. 1, FIG. 3 and FIG. 4, the flow state of the fluid is indicated by thick lines and arrows. 1, FIG. 3 and FIG. 4 show the same configuration with respect to other configurations except that the portion through which the fluid flows is different.

The heat supply device 4 is, for example, a combined heat and power supply device including a gas engine that uses city gas as a fuel and a fuel cell, and the heat source water A2 as the exhaust heat carrier fluid recovers exhaust heat from the gas engine and the fuel cell. It is configured as follows. A heat source water circulation path 7 for circulating the heat source water A2 is provided between the exhaust heat exchanger 5 and the heat supply device 4, and a heat source water expansion tank 8 and a heat source water circulation pump 9 are provided in the heat source water circulation path 7.
The heat source water circulation path 7 includes a heat source water flow rate sensor 11 that detects the flow rate of the heat source water A2 that is supplied from the heat supply device 4 to the exhaust heat exchanger 5, and a heat source that is supplied from the heat supply device 4 to the exhaust heat exchanger 5. A heat source water return temperature sensor 10 that detects the temperature of the water A2 and a heat source water return temperature sensor 12 that detects the temperature of the heat source water A2 returned from the exhaust heat exchanger 5 to the heat supply device 4 are provided.

  The heat storage tank 1 has an opening leading to the atmosphere at a position higher than the upper surface of the stored heat storage water A1, and the upper part is opened to the atmosphere. The heat storage tank 1 is composed of a rectangular cylindrical lower portion 1a and a rectangular cylindrical upper portion 1b, and is formed in a rectangular shape in plan view. The heat storage tank 1 is configured such that the cross-sectional area of the upper portion 1b, which is the interface portion between the stored heat storage water A1 and the atmosphere, is smaller than the cross-sectional area of the lower portion 1a other than the upper portion 1b. In this way, the heat dissipation loss is reduced by suppressing evaporation of the heat storage water A1.

  In order to replenish water as the heat storage water A1 and the heat source water A2 to the heat storage tank 1 and the heat source water expansion tank 8, a supply path 13 and supply valves 14a and 14b are provided. The heat storage tank 1 and the heat source water expansion tank 8 are provided with a pair of water level sensors 15a and 15b for detecting a lower limit water level and an upper limit water level. In the heat storage tank 1 and the heat source water expansion tank 8, when the water level sensors 15a and 15b detect that the water level is lower than the lower limit water level, the replenishing valves 14a and 14b are opened and water is replenished in the replenishment path 13. When the water level sensors 15a and 15b detect that the water level has reached the upper limit water level, the replenishing valves 14a and 14b are closed to stop the replenishment of water through the replenishment path 13. Thus, in the heat storage tank 1 and the heat source water expansion tank 8, the water levels of the heat storage water A1 and the heat source water A2 are maintained between the lower limit water level and the upper limit water level.

  The circulation path 2 is connected to the upper and lower parts of the heat storage tank 1, and the heat storage water circulation means 3 is configured to take out the heat storage water A 1 from the upper part of the heat storage tank 1 and return the heat storage water A 1 to the lower part of the heat storage tank 1. is doing. An exhaust heat exchanger bypass path 16 is provided for supplying the stored heat water A1 taken out from the heat storage tank 1 to the circulation path 2 to the heat exchanger 6 for heat dissipation by bypassing the exhaust heat exchanger 5. This exhaust heat exchanger bypass passage 16 is provided with a bypass passage adjustment valve 17 capable of adjusting whether or not the heat storage water A1 is supplied to the exhaust heat exchanger bypass passage 16 and its flow rate.

  The bypass path adjusting valve 17 corresponds to a supply state switching unit. The bypass passage adjusting valve 17 is in a valve opening state to supply heat storage water A1 to the exhaust heat exchanger bypass passage 16 (for example, a thick line portion in FIG. 4), and in a valve closing state, exhaust heat is discharged. The heat exchanger bypass passage 16 is configured to be switchable to a non-supply state (for example, a thick line portion in FIGS. 1 and 3) in which the heat storage water A1 is not supplied.

  The exhaust heat exchanger bypass 16 is provided with an auxiliary heating device 19 that heats the stored heat storage water A1 and an auxiliary heating temperature sensor 20 that detects the temperature of the heat storage water A1 that has passed through the auxiliary heating device 19. The auxiliary heating device 19 is configured to supply a fuel gas such as city gas to the gas burner 21 through the fuel gas supply passage 22 to burn the gas burner 21 and to heat the heat storage water A1 at a rated output. In this way, the auxiliary heating device 19 is provided with a low output operation prevention function that prevents the low heating operation by operating the auxiliary heating device 19 with an output of a predetermined output or more. When the auxiliary heating device 19 is operated, for example, if the operation is performed at a low output, the air becomes excessive and the thermal efficiency of the auxiliary heating device 19 itself is lowered. Then, the fall of the thermal efficiency of auxiliary heating device 19 itself can be suppressed by ensuring the flow volume of the thermal storage water A1 which flows into the auxiliary heating device 19 side, and operating the auxiliary heating device 19 with the rated output with favorable thermal efficiency. Further, since the auxiliary heating device 19 is simply configured to operate at the rated output, a configuration for adjusting the output is not required, and the auxiliary heating device 19 can have a simple configuration.

  In the circulation path 2, a heat storage tank bypass path 23 that connects a return portion 2 a that returns the heat storage water A 1 to the lower portion of the heat storage tank 1 and an extraction portion 2 b that extracts the heat storage water A 1 from the upper portion of the heat storage tank 1 is provided. In the circulation path 2, a heat storage tank return temperature sensor 24 that detects the temperature of the heat storage water A <b> 1 that returns to the lower part of the heat storage tank 1 is provided at a branch point of the heat storage tank bypass path 23. The heat storage tank bypass path 23 is provided with a bypass flow rate sensor 25 that detects the flow rate of the heat storage water A1 flowing therethrough.

  In the circulation path 2, the first heat storage water temperature sensor 26 that detects the temperature of the heat storage water A <b> 1 taken out from the heat storage tank 1 from the upstream side in the flow direction of the heat storage water A <b> 1, the heat storage water A <b> 1 of the circulation path 2 and the heat storage tank bypass A mixing control valve 27 capable of adjusting the mixing ratio with the heat storage water A1 in the passage 23, a heat storage water circulation pump 18 as the heat storage water circulation means 3, a second heat storage water temperature sensor 28 for detecting the temperature of the circulating heat storage water A1, an exhaust The first heat storage water flow rate adjustment valve 29 that can adjust the flow rate of the heat storage water A1 flowing through the heat heat exchanger 5, the exhaust heat exchanger 5, and the third heat storage water temperature that detects the temperature of the heat storage water A1 flowing through. A sensor 30, a hot water supply heat exchanger 31 as the heat dissipation heat exchanger 6, a second heat storage water flow rate adjustment valve 32 that detects the flow rate of the heat storage water A1 that passes through the hot water supply heat exchanger 31, and a heat storage water return temperature sensor 24. The flow rate of the heat storage water A1 returned to the bottom of the heat storage tank 1 is detected The flow sensor 53 is provided back heat storage water that.

The hot water supply heat exchanger 31 is configured such that the hot water supply water A3 supplied from the water supply path 33 and supplied to the hot water supply path 34 is a heat dissipation target of the heat storage water A1. The water supply path 33 is provided with a water supply temperature sensor 35 that detects the temperature of the water supplied to the hot water supply heat exchanger 21. An outlet temperature sensor 36 for detecting the temperature of the hot water supply water A3 after passing through the hot water supply heat exchanger 31 from the upstream side in the flow direction of the hot water supply water A3, There are provided a hot water supply amount sensor 37 for detecting the amount of hot water supplied, a hot water supply temperature sensor 38 for detecting the temperature of hot water supplied through the hot water supply passage 34, and a hot water supply adjustment valve 39 for adjusting whether or not to supply hot water through the hot water supply passage 34. Yes.
There is provided a hot water supply bypass passage 40 for supplying hot water supply water A3 from the water supply passage 33 to the hot water supply passage 34 by bypassing the hot water supply heat exchanger 31. In the hot water supply passage 34, a hot water supply in which the mixing ratio of the hot water supply water A 3 that has passed through the hot water supply heat exchanger 31 and the hot water supply water A 3 in the hot water supply bypass passage 40 can be adjusted is provided at the junction of the hot water supply bypass passage 40. A mixing adjustment valve 41 is provided.

In addition to the hot water supply heat exchanger 31, a heat exchanger 42 for bathing that uses the bathtub water A4 circulated between the bath tub Y and the heat storage water A1 as a heat radiation target is provided as the heat exchanger 6 for heat dissipation. Yes. The bath heat exchanger 42 is disposed in the branch flow path portion 2 c branched from the circulation path 2, and is provided in parallel with the hot water supply heat exchanger 31 in the circulation path 2. The branch flow path portion 2c is provided with a heat storage water adjusting valve 44 for adjusting whether or not the heat storage water A1 is supplied to the bath heat exchanger. Although the detailed illustration of the bath heat exchanger 42 is omitted, one of the bathtub water circulation path 43 that circulates the bathtub water A4 and the branch flow path portion 2c of the circulation path 2 that flows the heat storage water A1 is set inside, and It is composed of a double tube heat exchanger with the other outside. The bathtub water circulation path 43 is connected to the bathtub Y, and a bathtub water circulation sensor 45 and a bathtub water temperature sensor 46 that detects the temperature of the bathtub water A4 are provided.
A hot water supply passage 47 for supplying hot water to the bathtub Y is branched and connected to the hot water supply passage 34. The hot water passage 47 is connected to the bathtub water circulation path 43 and supplies hot water to the bathtub Y using the bathtub water circulation path 43. The hot water filling passage 47 is provided with a hot water flow rate sensor 48 for detecting the flow rate of hot water supplied to the bathtub Y, a hot water filling valve 49 for intermittently supplying hot water to the bathtub Y, and a bath check valve 50.

  The circulation path 2 is branched from a disposition location of the third heat storage water temperature sensor 30 and connected to a heat dissipation forward path 51 for supplying the heat storage water A1 to the heating radiator D. The heating radiator D A heat dissipation return path 52 is connected to return the heat storage water A1 supplied to the hot water supply heat exchanger 31 and the bath heat exchanger 42 to the downstream side. The heating radiator D corresponds to the heat dissipation heat exchanger 6 and is, for example, a floor heating panel that dissipates the heat storage water A <b> 1 supplied through the heat dissipation outbound path 51. Moreover, the radiator D for heating can also apply a bathroom heating apparatus etc. besides a floor heating panel. The return path 52 for heat dissipation is provided with a heat release return flow sensor 54 for detecting the flow rate of the stored heat storage water A1, a heat release check valve 55, and a heat release return temperature sensor 56 for detecting the temperature of the stored heat storage water A1. Yes.

  As shown in FIG. 2, this heat storage and heat dissipation system is normally installed outdoors while being stored in a storage body 57. The storage body 57 is formed in a rectangular shape by combining a rectangular first storage portion 57a, a rectangular second storage portion 57b, and a rectangular third storage portion 57c. The first storage unit 57 a stores the heat storage tank 1 and the heat source water expansion tank 8. The second storage portion 57b includes the circulation path 2, the heat storage water circulation means 3, the exhaust heat exchanger 5, the heat dissipation heat exchanger 6 and the like as a unit, and stores the unit. The 3rd accommodating part 57c accommodates the operation control apparatus 62 which controls the driving | operation of the auxiliary | assistant heating apparatus 19 and a thermal storage heat radiation system. The operation control device 62 corresponds to operation control means.

  In the 1st accommodating part 57a, the heat-source water expansion tank 8 is arrange | positioned above the lower part 1a of the thermal storage tank 1, and the side part corresponding to the rectangular short side of the upper part 1b of the thermal storage tank 1. FIG. The heat insulating material 58 is provided on each of the side surface portion and the upper surface portion of the first storage portion 57 a, and the heat insulating material 58 is provided so as to cover the outer peripheral portion of the heat storage tank 1. The heat storage tank 1 and the heat source water expansion tank 8 are provided in a heat insulating state in which the heat insulating material 58 suppresses heat radiation of the heat storage water A1.

  The second storage portion 57b is disposed on a side surface portion corresponding to the rectangular short side of the first storage portion 57a, and is formed to be lower in height than the first storage portion 57a. A heat insulating material 58 is provided on each of the side surface portion and the upper surface portion of the second storage portion 57b, the internal space of the second storage portion 57b is defined as a heat insulating space 59, and this heat insulating space 59 corresponds to the rectangular short side of the heat storage tank 1. Provided on the side surface. The unit comprising the circulation path 2, the heat storage water circulation means 3, the exhaust heat exchanger 5, the heat exchanger 6 for heat dissipation, etc., radiates heat of the heat storage water A1 in the heat insulating space 59 whose outer periphery is covered with the heat insulating material 58. Is provided in a heat-insulating state.

  The third storage portion 57c is disposed above the second storage portion 57b in the side surface portion corresponding to the rectangular short side of the first storage portion 57a. The third storage portion 57c is not provided with the heat insulating material 58, and the auxiliary heating device 19 and the operation control device 62 are provided in a non-insulated state that allows heat dissipation. In the side surface portion of the third storage portion 57c, an intake port 60 for the auxiliary heating device 19 to intake combustion air and an exhaust port 61 for exhausting the combustion exhaust gas of the auxiliary heating device 19 are provided.

  Thus, while effectively utilizing the space in the side surface corresponding to the rectangular short side of the heat storage tank 1, the circulation path 2, the heat storage water circulation means 3, the exhaust heat exchanger 5, and the heat exchanger for heat radiation The heat insulating space 59 and the auxiliary heating device 19 in which 6 etc. are arranged are arranged vertically and arranged compactly. In addition, since the storage body 57 itself that stores the heat storage and heat dissipation system is also thin and formed in a rectangular shape in plan view, the installation space of the heat storage and heat dissipation system can be made compact. Moreover, only by providing the heat insulating material 58 in each of the side surface part and the upper surface part of the first storage part 57a and the second storage part 57b, other than the auxiliary heating device 19 and the operation control device 62, the heat storage tank 1, the circulation path 2, Each device such as the heat storage water circulation means 3, the exhaust heat exchanger 5, and the heat exchanger 6 for heat radiation can be provided in a heat-insulated state, and the burden on the work surface and the cost can be reduced.

Hereinafter, the operation of the heat storage and heat dissipation system will be described based on FIGS. 1, 3, and 4.
The operation control device 62 is an exhaust heat storage operation for storing the exhaust heat of the heat supply device 4 conveyed by the heat source water A2 in the heat storage tank 1, and a heat dissipation that dissipates the heat storage water A1 by the heat exchanger 6 for heat dissipation. It is configured to drive.

(Exhaust heat storage operation)
As the exhaust heat storage operation, the first exhaust heat storage operation for storing the exhaust heat of the heat supply device 4 in the heat storage tank 1 so as to maintain the heat storage amount of the heat storage tank 1 at a predetermined heat storage amount or more, and the exhaust heat storage start condition Is satisfied, there is a second waste heat storage operation that starts storing heat in the heat storage tank 1 of the exhaust heat of the heat supply device 4 and stops heat storage in the heat storage tank 1 when the exhaust heat storage stop condition is satisfied.

The first exhaust heat storage operation will be described.
The operation control device 62 sequentially obtains the current heat storage amount. When the obtained heat storage amount becomes equal to or less than the set lower limit heat storage amount (for example, 2/3 of the full heat storage amount), the first exhaust heat storage operation is started. When the exhaust heat storage operation continuation time (for example, 1 to 2 hours) elapses from the start of the operation, the first exhaust heat storage operation is stopped.
For the current heat storage amount, for example, the operation control device 62 subtracts the discharged hot water output C2 from the previous heat storage completion and the heat release amount C3 of the heat storage tank 1 from the initial heat storage remaining amount C1, thereby obtaining the current heat storage amount. Can be requested. Here, the discharged hot water output C <b> 2 is an output of hot water discharged from the heat storage tank 1. The initial heat storage remaining amount C1 can be obtained using, for example, the following [Equation 1], and the dispensed hot water output C2 can be obtained, for example, using the following [Equation 2]. About calorie | heat amount C3, it can obtain | require, for example using following [Formula 3].

[Equation 1]
C1 = (T1-T2min) × V / 860
However, C1 is the initial heat storage remaining amount (kWh), T1 is the temperature detected by the first heat storage water temperature sensor when the previous exhaust heat storage operation is completed, and T2min is the heat storage in a limited period (for example, the past 5 days). The minimum detection temperature of the tank return temperature sensor 24, V is the effective heat storage water capacity of the heat storage tank 1.

[Equation 2]
C2 = (T1-T2) × F × 60/860
However, C2 is a discharge warm water output (kW), T1 is a detection temperature of the first heat storage water temperature sensor, T2 is a detection temperature of the heat storage tank return temperature sensor 24, and F is a heat storage water return flow rate sensor 53. This is the detected flow rate.

[Equation 3]
C3 = δTloss × V / 860
However, C3 is the heat dissipation amount (kW) of the heat storage tank 1, δTloss is the heat dissipation amount of the heat storage tank 1 per unit capacity, and V is the effective heat storage water capacity of the heat storage tank 1.

  Incidentally, although not described in detail, the operation control device 62 determines the heat load in the exhaust heat exchanger 5, the heat load in the auxiliary heating device 19, and the hot water supply heat based on the detection information of each temperature sensor and each flow sensor. Each heat load such as a heat load in the exchanger 31 can also be obtained.

  As shown in FIG. 1, the operation control device 62 is configured to operate the heat supply device 4 and the heat source water circulation pump 9 to supply the heat source water A <b> 2 to the exhaust heat exchanger 5. The operation control device 62 opens the first heat storage water flow rate adjustment valve 29 and the second heat storage water flow rate adjustment valve 32 to operate the heat storage water circulation pump 18, and the bypass path adjustment valve 17 is closed and is not supplied. And the heat storage water A1 taken out from the upper part of the heat storage tank 1 is supplied to the exhaust heat exchanger 5. Here, the operation control device 62 determines the opening degree of the first heat storage water flow rate adjustment valve 29 and the heat storage water circulation so that the temperature detected by the heat source water return temperature sensor 12 falls within a predetermined temperature range (for example, 70 ° C. ± set temperature). The heat storage water supply amount control for adjusting the flow rate of the heat storage water A1 that is supplied to the exhaust heat exchanger 5 by adjusting the rotation speed of the pump 18 is configured.

The second exhaust heat storage operation will be described.
The operation control device 62 manages the time-series power load, and the temperature detected by the first heat storage water temperature sensor 26 (from the heat storage tank 1 to the circulation path 2) in a time zone during which the power load increases (for example, early morning or evening). If the exhaust heat storage start condition is satisfied, the second exhaust heat storage operation is started, and the detected temperature of the first heat storage water temperature sensor 26 is When the exhaust heat storage stop temperature is reached, the second exhaust heat storage operation is stopped assuming that the exhaust heat storage stop condition is satisfied. The exhaust heat storage start temperature can be set to 63 ° C. in the winter, 58 ° C. in the intermediate season, and 55 ° C. in the summer, for example. The exhaust heat storage stop temperature can be set to, for example, 70 ° C. in the winter, 65 ° C. in the intermediate season, and 60 ° C. in the summer.

  The operation control device 62, for example, based on the power load for each time zone (every hour) that is actually used, the power load for each time zone (every hour) that is already stored. The time series power load is managed in a state where the power load is divided into power loads for each time zone (every hour) of the day. As for the power load, for example, the operation control device 62 is connected to the output value of an inverter that outputs the power of the cogeneration device as the heat supply device 4 and the power load of a television, a refrigerator, a washing machine, or the like. Based on the measurement information of the power measuring means provided in the power supply line, the actually used power load can be obtained.

  The flow state of the heat storage water A1 and the heat source water A2 in the second heat storage exhaust heat operation is the same as that in the first heat storage exhaust heat operation described above, and is the state shown in FIG. For example, the operation control device 62 sets the opening degree of the first heat storage water flow rate adjustment valve 29 to a predetermined opening degree and adjusts the rotation speed of the heat storage water circulation pump 18 to a predetermined rotation speed instead of the heat storage water supply amount control. It is composed. Then, when the current power load decreases during the second heat storage and exhaust heat operation, the operation control device 62 stores heat as the heat storage water circulation means 3 in order to increase the flow rate of the heat storage water A1 supplied to the exhaust heat exchanger 5. The water circulation pump 18 is activated. That is, the operation control device 62 is configured to increase the flow rate of the heat storage water A1 supplied to the exhaust heat exchanger 5, for example, by adjusting the rotation speed of the heat storage water circulation pump 18 to the maximum rotation speed. By increasing the rotational speed of the heat storage water circulation pump 18, the speed at which heat is stored in the heat storage tank 1 can be increased, and the heat storage in the heat storage tank 1 can be terminated early. When the current power load decreases, the power output from the combined heat and power supply device as the heat supply device 4 becomes redundant with respect to the power load. Therefore, the rotational speed of the heat storage water circulation pump 18 can be increased using the surplus power. Therefore, the speed at which heat is stored in the heat storage tank 1 can be increased while effectively using surplus power.

(Heat dissipation operation)
The operation control device 62 is configured to perform a hot water supply operation in which the heat storage water A1 is radiated by the hot water supply heat exchanger 31 as a heat dissipation operation.
When the temperature detected by the first heat storage water temperature sensor 26 is higher than the auxiliary heating start temperature (for example, 55 ° C.), the operation control device 62 does not heat the heat storage water A1 by the auxiliary heating device 19 in the heat dissipation operation. The heat storage water A1 is supplied to the hot water supply heat exchanger 31.

As shown in FIG. 3, the operation control device 62 opens the first heat storage water flow rate adjustment valve 29 and the second heat storage water flow rate adjustment valve 32 to operate the heat storage water circulation pump 18, and sets the bypass passage adjustment valve 17. It switches to a non-supply state as a valve-closed state, and is comprised so that the thermal storage water A1 taken out from the upper part of the thermal storage tank 1 may be supplied to the heat exchanger 31 for hot water supply. Further, the operation control device 52 adjusts the opening degree of the second heat storage water flow rate adjustment valve 32 so that the detection temperature of the outlet temperature sensor 36 becomes the hot water supply set temperature + α with the hot water supply adjustment valve 39 opened. The mixing ratio in the hot water supply mixing adjustment valve 41 is adjusted so that the detected flow rate of the hot water supply amount sensor 37 becomes the required hot water supply amount and the detected temperature of the hot water supply temperature sensor 38 becomes the hot water supply set temperature.
In this case, the operation control device 62 may operate the heat supply device 4 and operate the heat source water circulation pump 9 to supply the heat source water A2 to the exhaust heat exchanger 5 (see the thick line portion in FIG. 1). ). At this time, the heat storage water A1 taken out from the upper part of the heat storage tank 1 is heated by the exhaust heat exchanger 5 and then supplied to the hot water supply heat exchanger 31.

  When the heat storage water taken out from the heat storage tank 1 to the circulation path 2 is equal to or lower than the auxiliary heating start temperature (for example, 55 ° C.) in the heat radiation operation, the operation control device 62 opens the bypass path adjustment valve 17 to the supply state. At the same time as switching, when the operation of the auxiliary heating device 19 is started and the heat storage water taken out from the heat storage tank 1 to the circulation path 2 reaches the auxiliary heating stop temperature (for example, 58 ° C.) or higher, the bypass path adjustment valve 17 is closed. While switching to a supply state, it is comprised so that the driving | operation of the auxiliary heating apparatus 19 may be stopped.

  That is, when the temperature detected by the first heat storage water temperature sensor 26 is equal to or lower than the auxiliary heating start temperature (for example, 55 ° C.), the operation control device 62 sets the first heat storage water flow rate adjustment valve 29 as shown in FIG. The valve is closed and the bypass passage adjusting valve 17 is opened to switch to the supply state, and the heat storage water A1 taken out from the upper part of the heat storage tank 1 is supplied to the auxiliary heating device 19. The operation control device 62 starts supplying fuel gas to the gas burner 21 through the fuel gas supply path 22 and starts operation at the rated output of the auxiliary heating device 19. Thus, the heat storage water A1 taken out from the upper part of the heat storage tank 1 is heated by the auxiliary heating device 19, and the heated heat storage water A1 is supplied to the hot water supply heat exchanger 31. The flow state of the hot water supply water A3 in the water supply path 33 and the hot water supply path 34 at this time is the same as that shown in FIG.

  The heat storage water A1 heated by the auxiliary heating device 19 with an output of a predetermined output or higher is supplied to the hot water supply heat exchanger 31 and then returned to the lower part of the heat storage tank 1. Therefore, the heat generated by the auxiliary heating device 19 can be stored not only in the hot water supply but also in the heat storage tank 1. As a result, not only the exhaust heat of the heat supply device 4 but also the heat generated by the auxiliary heating device 19 can be effectively utilized while accumulating, and hot water supply, heating, etc. can be performed, further improving energy efficiency. Can be planned. Moreover, since the heat dissipation of the heat stored in the heat storage tank 1 can be suppressed, the heat storage amount of the heat storage tank 1 can be kept at a larger amount of heat, and the heat storage amount necessary for that is stored in the heat storage tank 1 at the time of performing the heat dissipation operation. Heat can be stored, and it is no longer necessary to store heat in the heat storage tank 1 before the time when the heat radiation operation is performed.

  When the temperature detected by the first heat storage water temperature sensor 26 is equal to or higher than the auxiliary heating stop temperature (for example, 58 ° C.), the operation control device 62 opens the first heat storage water flow rate adjustment valve 29 and sets the bypass passage adjustment valve 17. In addition to switching to the non-supply state as the closed valve state, the supply of the fuel gas to the gas burner 21 through the fuel gas supply path 22 is stopped to stop the operation of the auxiliary heating device 19, and the flow state is switched to that shown in FIG.

  In the flow state shown in FIG. 4, the operation control device 62 mixes to supply a part of the heat storage water A1 that passes through the hot water heat exchanger 31 and returns to the lower part of the heat storage tank 1 to the heat storage tank bypass 23. The mixing ratio in the adjusting valve 27 is adjusted. In this way, the temperature of the heat storage water A1 supplied to the auxiliary heating device 19 is increased by mixing the high temperature heat storage water A1 of the heat storage tank bypass passage 23 with the low temperature heat storage water A1 taken out from the upper part of the heat storage tank 1. I try to let them. At this time, the operation control device 62 is configured to adjust the mixing ratio in the mixing adjustment valve 27 so that the temperature of the heat storage water A1 supplied to the auxiliary heating device 19 is within a predetermined range.

  Even in the flow state shown in FIG. 4, the operation control device 62 opens the first heat storage water flow rate adjustment valve 29, operates the heat supply device 4 and operates the heat source water circulation pump 9, and exhaust heat heat The heat source water A2 may be supplied to the exchanger 5. At this time, the operation control device 62 adjusts the opening degree of the bypass passage adjustment valve 17 and the first heat storage water flow rate adjustment valve 29 so that the heat storage water A1 supplied to the hot water supply heat exchanger 31 is in a predetermined temperature range. It is configured as follows.

In addition to hot water supply operation, the operation control device 62 performs a reheating operation that heats the stored water A1 to the bath water A4 that is circulated between the bath Y and the bath heat exchanger 42, and for heating. It is comprised so that each of the heating operation which radiates the thermal storage water A1 with the heat radiator D may be performed.
In the chasing operation, the operation control device 62 operates the bathtub water circulation pump 45 to circulate the bathtub water A4 between the bathtub Y and the heat exchanger 42 for bath. Regarding the flow state of the heat storage water A1, the operation control device 62 closes the second heat storage water flow rate adjustment valve 32 and opens the heat storage water adjustment valve 44, and the hot water supply heat exchanger 31 has the heat storage water. The storage water A1 is supplied to the bath heat exchanger 42 without supplying A1. In this way, the bathtub water A4 is heated by the heat storage water A1 in the bath heat exchanger 42, and the heated bathtub water A is supplied to the bathtub Y, whereby the bathtub water A4 is re chased.
In the heating operation, the operation control device 62 closes the second heat storage water flow rate adjustment valve 32 and the heat storage water adjustment valve 44, and supplies the heat storage water A1 to the hot water supply heat exchanger 31 and the bath heat exchanger 42. Without, it is comprised so that the thermal storage water A1 may be supplied to the radiator D for heating. As described above, the heat storage water A1 is supplied to the heating radiator D to radiate heat.

  The operation control device 62 not only performs a hot water supply operation, a reheating operation, and a heating operation alone, but also performs, for example, a hot water supply operation, a reheating operation, and a heating operation. One and all can be done simultaneously.

[Another embodiment]
(1) In the said embodiment, how to arrange | position each apparatus, such as the thermal storage tank 1, the auxiliary | assistant heating apparatus 19, the waste heat exchanger 5, etc., and to accommodate in the accommodating body 57 can be changed suitably.

(2) In the said embodiment, what kind of shape it makes about the shape of the thermal storage tank 1 can be changed suitably.

(3) In the said embodiment, although the 1st thermal storage water temperature sensor 26 is provided in the circulation path 2, it is also possible to install directly in the upper part of the thermal storage tank 1, for example.

(4) In the above-described embodiment, as the heat-dissipating heat exchanger 6, there are provided the heat exchanger 31 for hot water supply, the heat exchanger 42 for bath, and the radiator D for heating. The number of vessels 6 can be changed as appropriate.

(5) In the above embodiment, the hot water supply heat exchanger 31 and the bath heat exchanger 42 are provided in parallel, but the hot water supply heat exchanger 31 and the bath heat exchanger 42 are provided in series. You can also

  The present invention relates to heat storage water circulating means that circulates heat storage water taken out from the heat storage tank and returns it to the heat storage tank, and heat storage that flows through the circulation path using exhaust heat transfer fluid that conveys exhaust heat of the heat supply device. Waste heat heat exchanger that heats water and heat dissipation heat exchanger that dissipates heat storage water after passing through the waste heat heat exchanger are provided to reduce work and costs when insulating each device It is possible to adapt to various heat storage and heat dissipation systems that can suppress heat dissipation loss.

The figure which shows the state of the thermal storage thermal radiation system in exhaust heat thermal storage operation The perspective view which shows the installation state of a thermal storage thermal radiation system The figure which shows the state of the thermal storage thermal radiation system in thermal radiation operation The figure which shows the state of the thermal storage thermal radiation system in thermal radiation operation

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat storage tank 2 Circulation path 3 Thermal storage water circulation means 4 Heat supply device 5 Waste heat exchanger 6 Heat radiation heat exchanger 16 Waste heat exchanger bypass path 17 Supply state switching means (bypass path adjustment valve)
19 Auxiliary heating device 58 Heat insulation material 59 Heat insulation space 62 Operation control means (operation control device)
A1 Heat storage water A2 Waste heat transfer fluid (heat source water)

Claims (9)

The heat storage tank for storing the heat storage water, the heat storage water circulating means for circulating the heat storage water taken out from the heat storage tank and returning it to the heat storage tank, and the exhaust heat transport fluid for transporting the exhaust heat of the heat supply device A heat storage and heat dissipation system provided with an exhaust heat exchanger that heats the heat storage water flowing through the circulation path, and a heat dissipation heat exchanger that dissipates the heat storage water after passing through the exhaust heat exchanger. ,
The heat storage water taken out from the heat storage tank to the circulation path bypasses the exhaust heat exchanger and supplies the heat dissipation heat exchanger to the exhaust heat exchanger bypass, and the exhaust heat exchanger bypass Supply state switching means capable of switching between a supply state for supplying heat storage water and a non-supply state for not supplying, an auxiliary heating device for heating the heat storage water flowing through the exhaust heat exchanger bypass, and the supply state switching Switching the means between a supply state and a non-supply state to control the circulation state of the heat storage water, and providing operation control means for controlling the operation of the auxiliary heating device,
The auxiliary heating device is provided in a non-insulated state allowing heat dissipation,
The heat storage tank, the circulation path, the heat storage water circulation means, the exhaust heat exchanger, and the heat dissipation heat exchanger are housed in a heat insulating space that suppresses heat dissipation by a heat insulating material and provided in a heat insulating state. Thermal storage heat dissipation system. The heat storage tank is open to the atmosphere and formed in a rectangular shape in plan view,
The heat insulation space is provided on a side surface corresponding to a rectangular short side of the heat storage tank,
The heat storage and heat dissipation system according to claim 1, wherein the heat insulating material is provided in a state of covering an outer peripheral portion of the heat storage tank and the heat insulating space.   The heat storage / radiation system according to claim 2, wherein the auxiliary heating device and the heat insulation space are arranged in a state of being arranged in a vertical direction on a side surface corresponding to a rectangular short side of the heat storage tank.   The heat storage heat dissipation system according to claim 2 or 3, wherein the heat storage tank is configured to make a cross-sectional area of an interface portion between the stored heat storage water and the atmosphere smaller than a cross-sectional area of a portion other than the interface portion. The heat storage water circulation means is configured to take out the heat storage water from the upper part of the heat storage tank and return the heat storage water to the lower part of the heat storage tank,
The operation control means switches the supply state switching means to a non-supply state and stores the exhaust heat of the heat supply device in the heat storage tank, and stores the supply state switch means in a supply state or non-supply state. The heat storage and heat dissipation system according to any one of claims 1 to 4, wherein the heat storage and heat dissipation system is configured to perform a heat radiation operation in which the heat storage water is radiated by the heat exchanger for heat radiation by switching to a state.   In the heat radiation operation, the operation control means switches the supply state switching means to a supply state when the heat storage water taken out from the heat storage tank to the circulation path is equal to or lower than the auxiliary heating start temperature, and operates the auxiliary heating device. And when the heat storage water taken out from the heat storage tank to the circulation path becomes equal to or higher than the auxiliary heating stop temperature, the supply state switching means is switched to the non-supply state and the operation of the auxiliary heating device is stopped. The heat storage and heat radiation system according to claim 5.   The heat storage and heat radiation system according to claim 5 or 6, wherein the auxiliary heating device is provided with a low output operation prevention function for preventing the operation at a low output by operating the auxiliary heating device at an output higher than a predetermined output. .   The operation control means manages the time-series power load, and when the heat storage water taken out from the heat storage tank to the circulation path becomes less than or equal to the exhaust heat storage start temperature in the time zone when the power load increases, the exhaust heat storage operation And when the electric power load decreases during the exhaust heat storage operation, the heat storage water circulation means is operated to increase the flow rate of the heat storage water supplied to the exhaust heat exchanger. The heat storage and heat radiation system of any one of? 7.   The heat storage device according to any one of claims 5 to 8, wherein the operation control means is configured to perform the exhaust heat storage operation so as to maintain a heat storage amount of the heat storage tank at or above a predetermined heat storage amount. Heat dissipation system.

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