JP4684119B2 - Installation number estimation system and cogeneration system controller - Google Patents

Description

  The present invention relates to a cogeneration system including a generator unit that generates power using fuel supplied from the outside, and an exhaust heat recovery device that recovers exhaust heat discharged from the generator unit and supplies it as thermal energy. System for estimating the number of installed units in a housing complex of a system by computer processing, and control of a cogeneration system in a housing complex with a cogeneration system of the number of units estimated by the number of installed units estimation system Relates to the device.

  Conventionally, in a cogeneration system capable of cogeneration that can use electric power and thermal energy generated by a generator unit, in general, operation control for operating the generator unit at a constant output only at the time of high power load or high heat load, Or the operation control which makes the output of a generator unit track the fluctuation | variation of an electric power load or a heat load is performed. By the way, when the generator unit is equipped with a prime mover such as a gas engine and a generator, generally, heat energy is generated more than electric power. Operation control is performed, for example, at a rated operation at a predetermined output of the engine speed (referred to as heat main operation).

  In such a cogeneration system capable of cogeneration, when the generator unit is operated at a constant output based on the heat load without following the power load, the power required for the individual power load of the dwelling unit is generated by the generator. It may be lower than the unit's generated power. Here, it is necessary to control the operation of the cogeneration system on the condition that the reverse power flow is not allowed due to a power supply contract etc. in a detached house etc. For example, there is a cogeneration system that prevents reverse power flow to the system power supply side by consuming surplus power obtained by subtracting the power supplied from the generated power to the door-to-door power load with an electric heater and using it as heat (for example, patents) Reference 1 and Patent Document 2).

  In addition, when installing a cogeneration system with a cogeneration system capable of cogeneration that can use the electric power and thermal energy generated by the generator unit, and making a power contract with the power supply source in a collective housing as a whole rather than in units of units Can reverse the power flow generated by the cogeneration system in the apartment house, and can use the power in the entire apartment house to reduce the amount of power received. Since the energy efficiency of the cogeneration system with respect to the primary energy is higher than that of the power supply from the power supplier, the more cogeneration systems are installed, the higher the number of operating cogeneration systems, the higher the energy efficiency with respect to the primary energy. Become.

  Furthermore, in collective housing, when a power contract is concluded with the power supply source in a collective housing as a whole rather than in units of dwelling units, at present, the basic charge for electricity is based on the amount of power received at the peak of the entire collective housing. Is set. In addition, when the amount of power received in the entire apartment is at a peak, it is small throughout the year. Therefore, if the amount of power received during the peak in the entire apartment can be reduced, the basic charge can be reduced and it is economically useful. It is.

JP 2000-320401 A JP 2003-153449 A

  However, if there are a large number of cogeneration systems installed in the entire apartment complex, the cogeneration system is forced to suppress the peak amount of electricity received in the entire apartment complex by operating the cogeneration system. When it is operated, there is a possibility that the thermal energy is excessively supplied with respect to the heat demand, and on the contrary, the energy efficiency is lowered. Furthermore, when the amount of reduction in the basic charge due to the reduction in the amount of power received at the peak is distributed to the dwelling unit where the cogeneration system is installed, the reduction effect of the basic charge is the operating cost of the cogeneration system due to the excessive supply of thermal energy. May be damaged by an increase in the energy consumption, the economic effect will be diminished, and the energy saving effect will also be reduced. Conversely, when the number of cogeneration systems installed in the entire housing complex is small, the energy saving effect on the primary energy of the entire housing complex is small, and the peak power supply source by operating the cogeneration system The amount of power received from the power supply cannot be sufficiently reduced, and the effect of reducing the basic charge in the power supply contract cannot be obtained sufficiently.

  The present invention has been made in view of the above problems, and its purpose is to provide a system for estimating the number of installed cogeneration systems that can determine the optimal number of installed cogeneration systems when contracting power collectively for the entire apartment house. The point is to provide. Moreover, the control apparatus which controls the cogeneration system in the apartment house in which the cogeneration system of the number set using the installation number estimation system was installed is provided.

  In order to achieve the above object, an installed number estimation system according to the present invention includes a generator unit that generates electric power using fuel supplied from the outside, and recovers heat generated by exhaust heat discharged from the generator unit. An installed number estimation system for estimating the optimum number of units installed in an apartment house for each dwelling unit of a cogeneration system provided with an exhaust heat recovery device to be supplied as energy by computer calculation processing, wherein the set in a predetermined evaluation period First reference power calculation means for obtaining the amount of power received at the peak of the house as first reference power, and the cogeneration system in the apartment house when an arbitrary number of cogeneration systems are operated from the first reference power. A second reference power calculating means for obtaining a second reference power obtained by subtracting the total generated power of the generation system; When the cogeneration system covers power demand exceeding the second reference power in the time zone exceeding the second reference power, the cogeneration system has excessive thermal energy supply with respect to the heat demand in the time zone. First index value calculating means for obtaining an index value of energy loss due to the above, and a number calculating means for obtaining the number of cogeneration systems when the index value satisfies a certain condition, To do.

  According to the installation number estimation system with the above characteristics, an index value of energy loss is obtained, and the optimum number of cogeneration systems installed in the apartment is calculated from the index value of energy loss. The optimal number of installed systems can be obtained. In the present application, “demand” is defined as an energy consumption amount obtained by dividing the load by the device efficiency.

  In order to achieve the above object, an installed number estimation system according to the present invention includes a generator unit that generates electric power using fuel supplied from the outside, and recovers heat generated by exhaust heat discharged from the generator unit. An installed number estimation system for estimating the optimum number of units installed in an apartment house for each dwelling unit of a cogeneration system provided with an exhaust heat recovery device to be supplied as energy by computer calculation processing, wherein the set in a predetermined evaluation period First reference power calculation means for obtaining the amount of power received at the peak of the house as first reference power, and the cogeneration system in the apartment house when an arbitrary number of cogeneration systems are operated from the first reference power. A second reference power calculating means for obtaining a second reference power obtained by subtracting the total generated power of the generation system; When the cogeneration system covers power demand exceeding the second reference power in the time zone exceeding the second reference power, the cogeneration system has excessive thermal energy supply with respect to the heat demand in the time zone. First index value calculating means for obtaining an index value of energy loss, second index value calculating means for calculating a second index value from the index value of energy loss, and the second index value satisfying a certain condition It is a 2nd characteristic to provide the number calculation means which calculates | requires the number of the said cogeneration system at the time.

  According to the installation number estimation system having the above characteristics, the second index value is obtained from the index value of energy loss, and the optimum number of cogeneration systems installed in the apartment is calculated from the second index value. The optimum number of cogeneration systems can be determined in consideration of other properties.

  The installed number estimation system of the above feature is characterized in that the second index is determined when a basic charge in a power supply contract when the collective housing receives power supply from a power supply source is determined based on the second reference power. The value is calculated by subtracting a value obtained by multiplying the energy loss index value by the energy consumption amount of the cogeneration system from the basic charge reduction amount based on the difference between the first reference power and the second reference power. This is the third feature.

  According to the installed number estimation system having the above characteristics, the cogeneration system is configured such that the second index value is changed from the basic charge reduction amount in a time zone in which the amount of received power exceeds the second reference power to the index value of the energy loss. It is calculated by subtracting the value multiplied by the energy consumption of, and the optimal number of cogeneration systems to be installed in the apartment is calculated from the second index value. Can do.

  In the installed number estimating system of any of the above features, the first reference power calculating means calculates the average power demand per unit at the peak time considering the characteristics (number of units, area, facilities, etc.) of the housing complex. A power demand input unit for inputting the power demand of the common unit, and a value obtained by adding the power demand of the common unit to a value obtained by multiplying the average power demand by the total number of houses of the apartment, the first reference power This is a fourth feature.

  According to the installed number estimating system having any of the above features, a specific embodiment of the first reference power calculating means can be obtained. In addition, the electricity demand for common areas is added to the value obtained by multiplying the average number of electricity per household at peak time by the total number according to the characteristics of the housing complex (number of units, area, facilities, etc.). Can be determined appropriately.

  In order to achieve the above object, a control device for a cogeneration system according to the present invention is a collective housing provided with the number of cogeneration systems estimated by the installed number estimating system having any one of the above characteristics. The first feature is that the cogeneration system is forcibly operated according to a predetermined ordering rule when the amount exceeds the second reference power set in advance based on the estimated number of units. .

  According to the control device of the cogeneration system having the above characteristics, the cogeneration system is forcibly operated when the power demand in the apartment exceeds the second reference power set in advance. The basic charge can be automatically reduced when the peak of no exceeds the second reference power and a power contract is collectively made for the entire apartment house.

  The control device of the cogeneration system having the above characteristics has a second characteristic that the predetermined ordering rule designates the cogeneration system having a large thermal load or a predicted thermal load value at the time of control.

  According to the control device for a cogeneration system having the above characteristics, a heat generation at the time of control or a cogeneration system having a large predicted heat load value is designated, so that energy loss of heat energy can be reduced.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a control device for an installed number estimation system and a cogeneration system according to the present invention (hereinafter referred to as “the present invention system” and “the present invention device” as appropriate) will be described below with reference to the drawings.

  First, the configuration of the present invention device and cogeneration system in an apartment house will be described. Here, FIG. 1 shows a schematic configuration of an apartment house in which a cogeneration system 1 controlled using the device 2 of the present invention is installed. The apartment house here has an electric power supply contract for receiving electric power supply from the electric power supply source collectively in the entire apartment house. Moreover, the cogeneration system 1 of the number set by this invention system is installed in each dwelling unit 3 in the apartment house, and the cogeneration system 1 is not installed from the cogeneration system 1 of each dwelling unit 3. It is configured to allow reverse power flow with respect to the power load of other dwelling units and common areas. Here, it is assumed that the basic charge in the power contract is determined by the amount of power received (demand value) at the peak of an apartment house, for example, during the year (predetermined evaluation period).

  In the apartment house provided with the number of cogeneration systems 1 estimated by the system of the present invention, which will be described later, the present invention device 2 normally responds to the heat demand of each dwelling unit 3 with respect to the cogeneration system 1 of each dwelling unit 3. When the main heat operation for operating the cogeneration system 1 (control mode for operating the cogeneration system 1 according to the heat demand) is performed, and the amount of power received by the housing complex exceeds the preset second reference power, Control is made so that the number of cogeneration systems 1 corresponding to the excess power is selected according to a predetermined ordering rule and is forcibly operated. Here, the predetermined ordering rule is set so as to designate the heat load at the time of control or the cogeneration system 1 having a large heat load prediction value. Since the demand value is reduced to the second reference power by the forced operation of the cogeneration system 1, the forced operation is hereinafter referred to as demand cut operation.

  In addition, the cogeneration system 1 is forced to perform a demand cut operation by the control of the device 2 of the present invention, and the cogeneration system has the effect of reducing the basic charge by suppressing the amount of power received at peak time (demand value) in the entire apartment house. Return to each dwelling unit 3 where 1 is installed. Specifically, for the dwelling unit 3 where the cogeneration system 1 is installed, the electricity rate is set to [basic rate x (demand value per unit-rated power generation amount) + metered rate], and the cogeneration system 1 is installed. For dwelling units that are not used, [basic charge × demand value per unit + metered charge].

  The cogeneration system 1 is configured to receive a control signal from the device 2 of the present invention, and the cogeneration system 1 is connected to a system power supply via a power sale / power purchase meter and a distribution board. Here, FIG. 2 is a schematic configuration diagram showing the configuration of the cogeneration system 1 used in the device 2 of the present invention. Here, the cogeneration system 1 normally performs the heat main operation, and when the heat energy is excessively supplied during the demand cut operation and the heat energy is excessively supplied, if there is a hot water storage tank, the hot water storage is performed. When heat is stored in the tank and thermal energy is excessively supplied, the generated thermal energy is not used effectively, and only electric power is used.

  As shown in FIG. 2, the cogeneration system 1 includes an engine 4 a such as a gas engine or a micro gas turbine that generates rotational energy by burning city gas (corresponding to fuel supplied from the outside), and rotation of the engine 4 a. A generator unit 4 including a generator 4b that generates first AC power from energy, an inverter 5 that converts the first AC power generated by the generator 4b into second AC power having a predetermined voltage and frequency, The exhaust heat recovery device 6 that recovers exhaust heat exhausted from the engine 4a and supplies thermal energy to the heat load 22, and consumes a part of the electric power output from the inverter 5 and supplies the heat energy to the exhaust heat recovery device 6. The net electric power P1 output from the electric heater 7 and the inverter 5 to the outside is controlled according to the interconnection state between the power load 21 and the system power supply 30 and the like. The output control means 8 for determining the control value, the first operation control unit 12a for controlling the output of the inverter 5, the second operation control unit 12b for controlling the number of revolutions of the engine 4a, and the electric heater 7 for controlling the operation. The operation control means 12 which consists of 3 operation control parts 12c is provided and comprised.

  The inverter 5 includes an AC / DC converter that converts the first AC power generated by the generator 4b into DC power, and the DC power converted by the AC / DC converter at the same voltage and frequency as the system power supply 30. A DC / AC conversion unit that converts the AC power into two AC powers, and an interconnection relay that interconnects the second AC power converted by the DC / AC conversion unit and the AC power of the system power supply 30. The Since the inverter 5 is realized with a known circuit configuration, a detailed description is omitted.

  The exhaust heat recovery device 6 includes a heat exchanger that recovers exhaust heat exhausted from the engine 4a by heat exchange by heat exchange, a hot water tank, an auxiliary heat source machine such as a gas boiler, and the like. 1 It is possible to supply heat energy using hot water as a medium to the heat load 22 such as hot water supply to the bathtub, bathroom, kitchen, etc. in each dwelling unit 3 installed, and circulating hot water for heating of each room. It is configured.

  The output control means 8 determines the connection state between the power load 21 and the system power supply 30 of the entire apartment based on the measured values of an ammeter and a voltmeter (not shown) installed inside and outside the inverter 5. At the same time, the control value of the output power P1 output to the outside of the cogeneration system 1 is determined.

  Each control part 12a-12c of the operation control means 12 performs the operation control mentioned later based on the control value of the output electric power P1 which the output control means 8 determined. The output control means 8 and the operation control means 12 are realized by executing respective processes as software, and the whole is configured by applying a stored program type computer system such as a microcomputer.

  The operation control means 12 of the cogeneration system 1 causes the generator unit 4 to perform a rated operation. Specifically, the second operation control unit 12b is rated in a predetermined time zone immediately before the demand occurs according to the demand prediction of the thermal load 22 in the house where the cogeneration system 1 is installed. The engine 4a is controlled to operate (heat main operation) so that the operation is stopped in other cases. The third operation control unit 12 c controls the electric heater 7 in order to adjust the output voltage P <b> 1 output to the outside of the cogeneration system 1. Here, the case where the power consumption of the electric heater 7 is configured to change following the supplied power will be described. However, the electric heater 7 may be configured to be switchable in stages. Alternatively, it may be fixed to a constant value. Further, the first operation control unit 12a controls the operation so as to reduce the output of the inverter 5 when the surplus power generated during the rated output operation of the generator unit 4 is larger than the maximum power consumption of the electric heater 7, for example. You may comprise so that it may do.

<First Embodiment>
A first embodiment of the system of the present invention will be described with reference to FIGS. The system 100 of the present invention estimates the optimum number of cogeneration systems installed in a housing complex for each dwelling unit by computer arithmetic processing, and is configured in software using a general-purpose computer such as a commercially available personal computer.

  As shown in FIG. 3, the system 100 of the present invention includes a first reference power calculation unit 101 that obtains a power reception amount (demand value) at a peak of an apartment house during a predetermined evaluation period as a first reference power, and a first reference A second reference power calculation means 102 for obtaining a second reference power obtained by subtracting the total generated power of the cogeneration system in the apartment house when an arbitrary number of cogeneration systems are operated from the power; When the cogeneration system covers power demand that exceeds the second reference power in a time zone that exceeds the reference power (during demand cut operation), the cogeneration system has an excessive supply of thermal energy with respect to the heat demand during the demand cut operation. The first index value calculating means 103 for obtaining the index value of the energy loss caused by By changing the number of the cogeneration system, and a number calculating means 104 for determining the number of cogeneration system when the index value satisfies a predetermined condition.

  The setting of the optimum number by the system 100 of the present invention will be described with reference to FIG. First, the first reference power calculation unit 101 calculates the first reference power D1 [kW] based on the power reception amount of the apartment house at the peak time. Specifically, the power demand input unit 101a takes into account the characteristics (number of units, area, facilities, etc.) of the housing complex in advance and statistically determined the average power demand per household Da [kW per peak. / Door] and common area power demand Db [kW] are received, average door-to-door power demand Da [kW / door], number of dwelling units in the apartment house [door], common area power demand Db [kW] Based on the above, it is calculated from Equation 1 (# 101).

[Equation 1]
D1 [kW] = Da [kW / door] × n [door] + Db [kW]

  In Equation 1, all the dwelling units in the housing complex are assumed to be uniform dwelling units, and are calculated under the same conditions. However, if there are mixed dwelling units with different characteristics, each unit has different numerical values in consideration of the characteristics of each dwelling unit. You may make a trial calculation using.

  Subsequently, the system 100 of the present invention provisionally sets the number of installed cogeneration systems m [doors] (# 102). In the present embodiment, the installed number m is temporarily set with the maximum number of cogeneration systems that can be installed in the apartment house as an initial value. Here, FIG. 5 shows that the cogeneration system has an excessive supply of thermal energy with respect to the heat demand during the demand cut operation when the demand generation operation supplies the power demand exceeding the second reference power with the cogeneration system. This shows the relationship between the index value α of the energy loss due to and the output value of the cogeneration system. In the graph of FIG. 5, the energy loss index value α decreases as the number of installed units decreases, but the energy efficiency of the cogeneration system with respect to the primary energy when the thermal energy is effectively used by the main heat operation is the power supply. Since it is higher than the energy efficiency with respect to the primary energy in the power supply from the source, the energy efficiency during normal operation becomes higher as the number of cogeneration systems installed is larger. Therefore, the number m of cogeneration systems installed is gradually reduced from the initial value as the maximum number that can be installed in the apartment house, so that the relationship between the energy efficiency during normal operation and the index value α of energy loss during demand cut operation. It can be said that the optimum value can be obtained from

  Subsequently, when the cogeneration system covers the power demand exceeding the second reference power in the time zone when the amount of power received exceeds the second reference power, the maximum power output value Ex [kW / house] per cogeneration system is set. Set (# 103).

  Subsequently, the second reference power calculation means 102 subtracts the total generated power of the cogeneration system in the apartment house when the temporarily set number m of cogeneration systems are operated from the first reference power. The power D2 is calculated from Equation 2 (# 104).

[Equation 2]
D2 [kW] = D1 [kW] −Ex [kW] × m [door]

  Subsequently, the date and time of the demand cut operation, the operation time (y day, z time), and the electric energy w [kWh] required for the demand cut operation are predicted. Here, for example, the table shown in FIG. 6 is prepared in advance and the date and time of the demand cut operation, the operation time (y day, z time), and the electric energy w [kWh] are prepared (# 105). ).

  Subsequently, from the power amount Wi [kWh] required for the demand cut operation at a predetermined date and time (yi day, zi time) when the demand cut operation is performed, the cogeneration power generation power Pi [kWh] and the cogeneration generated heat amount Qai of each cogeneration system 1 [kJ], cogeneration energy consumption Fi [kJ] is calculated, and the heat demand Qbi [kJ] of each dwelling unit is separately estimated (# 106).

  If there is a hot water storage tank, the amount of heat Qci [kJ] that can be stored from the hot water storage capacity and the tap water temperature is calculated from Equation 3 using the hot water temperature Tci, the tap water temperature Twi, and the hot water storage capacity Z of the hot water storage tank (# 107). ).

[Equation 3]
Qci [kJ] = (Tci−Twi) × Z

  Subsequently, the heat quantity Qdi [kJ] that cannot be used during the demand cut operation is calculated from Equation 4 (# 108).

[Equation 4]
Qdi [kJ] = Qai [kJ] −Qbi [kJ] −Qci [kJ]

  Furthermore, steps # 106 to # 108 are repeated for all dates and times (yi day, zi time) (i = 1,..., L) for performing the demand cut operation (# 109).

  Subsequently, the first index value calculation unit 103 obtains an index value α of energy loss due to excessive heat energy supply in the cogeneration system 1 with respect to the heat demand during the demand cut operation. Specifically, the heat quantity Qdi [kJ] and the cogeneration energy consumption Fi [kJ] that cannot be used during the demand cut operation, which are obtained in steps # 106 to # 108, are obtained from Equation 5 (# 110).

[Equation 5]
α = (ΣQdi [kJ], i = 1, L) ÷ (ΣFi [kJ], i = 1, L)

  Subsequently, the number calculation means 104 determines an index value α of energy loss. In the present embodiment, the energy loss index value α is compared with a predetermined set value (# 111). If the index value α of energy loss exceeds a preset value, for example, the energy efficiency of the cogeneration system can be reduced by supplying power from the outside for normal operation (thermal main operation). It is a case where the energy loss of thermal energy due to forced operation of the cogeneration system during demand cut operation is larger than the decrease, and in this case, the number m of installed cogeneration systems is reduced by one (# 102), Steps # 103 to # 110 are executed again. If the energy loss index value α is equal to or less than a predetermined set value, the temporarily set number m of installations at this time is set as the optimum number, and the process is terminated.

Second Embodiment
A second embodiment of the system of the present invention will be described with reference to FIGS. As shown in FIG. 7, the inventive system 100 of the present embodiment is in addition to the first reference power calculation means 101, the second reference power calculation means 102, and the first index value calculation means 103 of the first embodiment. The second index value calculating means 105 for calculating the second index value from the index value of energy loss is provided, and the number calculating means 104 changes the number of cogeneration systems to be operated so that the second index value satisfies a certain condition. It is configured to obtain the number of cogeneration systems when satisfied.

  Specifically, the second index value calculation means 105 of the present embodiment is used when the basic charge in the power supply contract when the apartment house receives power supply from the outside collectively is determined based on the second reference power. The second index value is calculated by subtracting a value obtained by multiplying the index value of the energy loss by the energy consumption amount of the cogeneration system from the reduction amount of the basic charge in the time zone in which the received power amount exceeds the second reference power.

  Next, setting of the optimum number by the system 100 of the present invention in the present embodiment will be described based on FIG. The processing from step # 101 to step # 109 is the same as that in the first embodiment, and the description thereof is omitted in this embodiment.

  After the execution of step # 109, the second index value calculation means 105 uses the second index value C [yen / year] as a basic charge by reducing the amount of power received at the peak of the entire apartment house by performing demand cut operation. (6) using the reduction effect A [yen / year], the energy loss index value α, and the cost B [yen / year] of the cogeneration consumed energy amount Fi [kJ] (# 110).

[Equation 6]
C [yen / year] = A [yen / year] −α × B [yen / year]

  The number calculation means 104 determines the second index value C [yen / year]. In the present embodiment, the second index value C [yen / year] is compared with a predetermined set value (# 111). If the second index value C [yen / year] exceeds a predetermined set value, the number m of installed cogeneration systems is reduced by one (# 102), and steps # 103 to # 110 are executed again. To do. When the second index value C [yen / year] is less than or equal to a predetermined set value, the process is terminated with the temporarily set number m of installations being the optimum number.

  In each of the above embodiments, the case where the cogeneration system is rated-operated has been described. However, when the output of the cogeneration system is configured to be variable, in step # 103 in FIGS. 4 and 8, the cogeneration system You may comprise so that the electric power generation output value Ex per unit may be lowered | hung (route | route shown with the broken line which returns to step # 103 from step # 111 in FIG.4 and FIG.8).

  Moreover, although the initial value at the time of setting the number m of installations in step # 102 of each embodiment was made into the total number of apartment houses, when it is estimated that the number of installations will be in the general range with respect to the total number of houses. The upper limit of the range may be used.

The schematic block diagram which shows the structure of the control apparatus of the cogeneration system which concerns on this invention, and its peripheral device The block diagram which shows schematic structure of the cogeneration system used with the control apparatus of the cogeneration system which concerns on this invention Schematic configuration diagram showing a schematic configuration in the first embodiment of the installed number estimation system according to the present invention. The flowchart which shows the operation | movement in 1st Embodiment of the installation number estimation system which concerns on this invention. Graph showing the relationship between the index value of energy loss and the value obtained by multiplying the number of installed cogeneration systems and the maximum power output value Table showing the number of days generated during demand cut operation, operation time, and operation output The schematic block diagram which shows schematic structure in 2nd Embodiment of the installation number estimation system which concerns on this invention The flowchart which shows the operation | movement in 2nd Embodiment of the installation number estimation system which concerns on this invention.

Explanation of symbols

1: Cogeneration system 2: Cogeneration system control device 3 according to the present invention: Dwelling unit 4: Generator unit 4a: Engine 4b: Generator 5: Inverter 6: Waste heat recovery device 7: Electric heater 8: Output control means 12: Operation control means 12a: 1st operation control part 12b: 2nd operation control part 12c: 3rd operation control part 21: Electric power load 22: Thermal load 30: System power supply 100: Installed number estimation system 101 concerning this invention: First reference power calculation unit 101a: power demand input unit 102: second reference power calculation unit 103: first index value calculation unit 104: number of units calculation unit 105: second index value calculation unit

Claims (6)

A cogeneration system comprising a generator unit that generates electric power using fuel supplied from the outside, and an exhaust heat recovery device that recovers exhaust heat discharged from the generator unit and supplies it as thermal energy, An installation number estimation system for estimating the optimum number of units to be installed in a housing complex by computer processing,
First reference power calculation means for obtaining a power reception amount at the peak of the apartment house during a predetermined evaluation period as a first reference power;
A second reference power calculating means for obtaining a second reference power obtained by subtracting the total generated power of the cogeneration system in the apartment house when an arbitrary number of cogeneration systems are operated from the first reference power;
In the time zone in which the amount of received power exceeds the second reference power, when the cogeneration system covers the power demand exceeding the second reference power, the cogeneration system is adapted to the thermal energy for the heat demand in the time zone. A first index value calculating means for obtaining an index value of energy loss due to excessive supply;
A number-of-installation-units estimation system, comprising: a unit number calculating means for determining the number of the cogeneration systems when the index value satisfies a certain condition. A cogeneration system comprising a generator unit that generates electric power using fuel supplied from the outside, and an exhaust heat recovery device that recovers exhaust heat discharged from the generator unit and supplies it as thermal energy, An installation number estimation system for estimating the optimum number of units to be installed in a housing complex by computer processing,
First reference power calculation means for obtaining a power reception amount at the peak of the apartment house during a predetermined evaluation period as a first reference power;
A second reference power calculating means for obtaining a second reference power obtained by subtracting the total generated power of the cogeneration system in the apartment house when an arbitrary number of cogeneration systems are operated from the first reference power;
In the time zone in which the amount of received power exceeds the second reference power, when the cogeneration system covers the power demand exceeding the second reference power, the cogeneration system is adapted to the thermal energy for the heat demand in the time zone. A first index value calculating means for obtaining an index value of energy loss due to excessive supply;
Second index value calculating means for calculating a second index value from the index value of the energy loss;
A number-of-installation-units estimation system, comprising: a unit number calculating unit for determining the number of the cogeneration systems when the second index value satisfies a certain condition.   When the basic charge in the power supply contract when the collective housing receives power supply from the power supply source is determined based on the second reference power, the second index value is the first reference power and The calculation is performed by subtracting a value obtained by multiplying the energy loss index value by the energy consumption amount of the cogeneration system from the reduction amount of the basic charge based on the difference of the second reference power. The system for estimating the number of installed units as described in.   The first reference power calculation means includes a power demand input unit that inputs the average power demand per unit at the peak time and the power demand of the common part in consideration of the characteristics of the apartment house, The installation according to any one of claims 1 to 3, wherein a value obtained by multiplying a value obtained by multiplying the total number of houses of the collective housing by a power demand of the shared unit is the first reference power. Number estimation system.   In the apartment house provided with the number of the cogeneration systems estimated by the installed number estimation system according to any one of claims 1 to 4, the power reception amount of the apartment house is preliminarily determined based on the estimated number. A cogeneration system control device for forcibly operating the cogeneration system according to a predetermined ordering rule when the set second reference power is exceeded. The cogeneration system control device according to claim 5, wherein the predetermined ordering rule specifies the cogeneration system having a large thermal load or a predicted thermal load value at the time of control.