JP2020166845A - Distributed power generation system and energy charge display method capable of displaying energy charge - Google Patents

Abstract

To provide criteria for selecting whether users perform repair procedures when power generators break down.SOLUTION: A distributed power generation system includes a distributed power generator, a controller for controlling operation of the distributed power generator, and a heat source machine. The controller includes: a failure detection unit that detects the presence or absence of a failure in the distributed power generator; and a display control unit that controls the distributed power generator to stop and a display unit to display a first energy charge which is prediction of expenses for a consumption amount of energy including at least any of gas and electricity at the time of using the heat source machine alone when a failure occurs in the distributed power generator.SELECTED DRAWING: Figure 9

Description

The present invention relates to a distributed power generation system capable of displaying an energy charge and an energy charge display method.

Patent Document 1 discloses a technique in which a host device remotely monitors a power generation device such as a cogeneration system to perform failure diagnosis, maintenance, inspection, maintenance, and the like. In Patent Document 1, terminal devices are provided corresponding to each of the plurality of power generation devices, and each terminal device transmits the operating status of each power generation device to the host device. The host device determines the state of each cogeneration system based on the operating status transmitted from each terminal device. As a result, it is possible to appropriately and economically determine the failure of each power generation device.

Japanese Unexamined Patent Publication No. 2003-131730

In Patent Document 1, although a failure of each power generation device can be detected by a host device, a method of dealing with the user when a failure occurs has not been studied.
For example, when a failure occurs in a power generation device, a serviceman visits the user's house where the power generation device is installed and diagnoses the power generation device as the first procedure. In this case, a visit fee is incurred according to the visit by the service person and the diagnosis of the faulty part and the condition. Furthermore, as a result of the diagnosis, if repair is necessary, the repair fee will be presented by the serviceman. When the power generation device breaks down in this way, the serviceman is not given the criteria for selecting whether or not to carry out the repair procedure, and regardless of whether or not the power generation device is repaired. You have to pay the visit fee according to your visit. Furthermore, the repair fee cannot be ascertained without going through the procedure of visiting the serviceman. Therefore, there is an aspect that the convenience of the user is not considered.

Further, the management side of the power generation device is also complicated because the serviceman visits the power generation device and diagnoses the faulty part and the state regardless of whether or not the user repairs the power generation device.

Therefore, the present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a standard for a user to select whether or not to perform a procedure for repair in the event of a failure of a power generation device.

The present invention is a distributed power generation system including a distributed power generation device, a control device for controlling the operation of the distributed power generation device, and a heat source machine.
The control device
A failure detection unit that detects the presence or absence of a failure in the distributed power generation device, and
When a failure occurs in the distributed power generation device, the cost for energy consumption including at least one of gas and electricity when the distributed power generation device is stopped and the heat source device is used alone is the first prediction. 1 It has a display control unit that controls the energy charge to be displayed on the display unit.

According to the above-mentioned feature configuration, when a failure occurs in the distributed power generation device, the user can stop the distributed power generation device and grasp the first energy charge when the heat source device is used independently. Therefore, the user can obtain the first energy charge as a criterion for selecting whether or not to perform the procedure associated with the repair, which improves the convenience of the user.

In addition, regardless of whether the user wants or does not want to repair the failure of the distributed power generation device, a visit by a serviceman and a visit fee are incurred depending on the diagnosis of the failure location and condition. According to the above configuration, the user can check the energy charge without paying the visit fee.
The first energy charge is a predicted energy charge including at least one of gas and electricity in the facility when the heat source unit is used alone in the distributed power generation system.

When the heat source unit is used alone, the power generated by the distributed power generation device is used in the facility, and the profits enjoyed by not purchasing the grid power, the profits obtained by reversing the generated power, and the distributed power generation By using the equipment, the profit that the price of electricity purchased from the grid power was cheaper, and by using the distributed power generation equipment, the profit that the price of the gas charge purchased from the gas company was cheaper can be obtained. It disappears. In consideration of these points and the like, the user can determine whether or not to perform the repair by referring to the first energy charge. Further, the first energy charge may be used as a criterion for whether or not at least one of the distributed power generation device and the heat source device is replaced with a new one.

For example, if the user does not repair, the first energy fee will be paid, but by paying the repair fee and repairing, the above-mentioned various benefits can be obtained, and whether or not the repair fee can be recovered, etc. Can be judged.
Further, the side managing the distributed power generation device can also perform the work based on the user's judgment as to whether or not to perform the repair. Therefore, when it is unclear whether or not to repair, it is possible to reduce complicated work such as visiting a facility where a distributed power generation device in which a failure has occurred is installed and diagnosing a failure location.

Further characteristic configurations of the distributed power generation system according to the present invention are:
The first energy charge is based on a first energy charge table different from the second energy charge table.
The first energy price list is a price list of energy including at least one of gas and electricity when the distributed power generation device is stopped and the heat source machine is used alone.
The second energy price list is a price list of energy including at least one of gas and electricity when the distributed power generation device is operated and the heat source machine uses heat from the distributed power generation device. There is a certain point.

The energy price list may differ depending on whether the distributed power generation device is operated to operate the heat source unit or the distributed power generation device is stopped and the heat source unit is used independently. According to the above feature configuration, the first energy charge is calculated more accurately because it is based on the first energy charge table when the distributed power generation device is stopped and the heat source unit is operated.

Further characteristic configurations of the distributed power generation system according to the present invention are:
The display control unit is communicably connected to the control device, receives the first energy charge from a system server that manages the operating state of the distributed power generation device, and displays the first energy charge on the display unit. It is in the point of controlling to do so.

According to the above-mentioned feature configuration, the first energy charge when the distributed power generation device is stopped and the heat source unit is used independently can be acquired from the system server and displayed. The system server holds, for example, a first energy charge table, and calculates the first energy charge based on the first energy charge table. Alternatively, the system server obtains the first energy charge table from the energy company server of the energy company that sells energy including gas and electricity, and calculates the first energy charge.

Further characteristic configurations of the distributed power generation system according to the present invention are:
The display control unit is provided in an energy company that supplies energy to a facility including the heat source unit, acquires the first energy charge from an energy company server communicably connected to the control device, and obtains the first energy charge. The point is to control the charge to be displayed on the display unit.

According to the above feature configuration, the display control unit can acquire the first energy charge from the energy company server and display it. The energy company server has, for example, a first energy charge table in which the first energy charge is associated with each energy usage amount, and calculates the first energy charge based on the first energy charge table.

Further characteristic configurations of the distributed power generation system according to the present invention are:
The control device
An energy charge table storage unit that stores a first energy charge table which is an energy charge table including at least one of gas and electricity when the distributed power generation device is stopped and the heat source unit is used independently.
Based on the first energy charge table, it has an energy charge acquisition unit that acquires the first energy charge according to the energy consumption.
The display control unit acquires the first energy charge from the energy charge acquisition unit and controls the display to display the first energy charge on the display unit.

According to the above-mentioned feature configuration, since the control device has the first energy charge table, the first energy charge can be easily acquired and displayed.

Further characteristic configurations of the distributed power generation system according to the present invention are:
When the display control unit repairs the distributed power generation device in which the failure has occurred, the repaired distributed power generation device is operated, and the heat source machine uses the heat from the repaired distributed power generation device. A second energy charge, which is a cost for energy consumption including at least one of gas and electricity, is controlled to be displayed on the display unit.

According to the above feature configuration, the user repairs not only the first energy charge when the heat source unit is used alone without repairing the distributed power generation device in which the failure has occurred, but also the distributed power generation device in which the failure has occurred. , The repaired distributed power generation device is operated, and the second energy charge when the heat source machine uses the heat generated by the power generation operation of the repaired distributed power generation device can be grasped. Therefore, the user either repairs and reuses the distributed power generation device by weighing the first energy charge and the second energy charge, or stops the distributed power generation device and uses the heat source unit independently. It is possible to judge whether it is, and the convenience of the user is improved.

Further, by displaying the first and second energy charges, the user can select whether or not to perform the procedure associated with the repair by weighing the first energy charge and the second energy charge. That is, it can be seen that the user pays the first energy fee if the repair is not performed, and pays the repair fee and the second energy fee if the repair is performed. Since the second energy charge is generally cheaper than the first energy charge, it is possible to judge whether or not the repair charge can be recovered even if the repair is performed by paying the repair charge.
Further, the second energy charge may be used as a criterion for whether or not at least one of the distributed power generation device and the heat source device is replaced with a new one.

Further characteristic configurations of the distributed power generation system according to the present invention are:
The display control unit is communicably connected to the control device, receives a front second energy charge from a system server that manages the operating state of the distributed power generation device, and displays the second energy charge on the display unit. It is in the point of controlling to do so.

According to the above feature configuration, the second energy charge can be acquired from the system server and displayed.
The system server holds, for example, a second energy charge table, and calculates the second energy charge based on the second energy charge table. Alternatively, the system server obtains a second energy charge from, for example, an energy company server of an energy company that sells energy including gas and electricity.

Further characteristic configurations of the distributed power generation system according to the present invention are:
The display control unit is provided in an energy company that supplies energy to a facility including the heat source unit, acquires the second energy charge from an energy company server communicably connected to the control device, and obtains the second energy charge. The point is to control the charge to be displayed on the display unit.

According to the above feature configuration, the display control unit can acquire the second energy charge from the energy company server and display it. The energy company server has, for example, a second energy charge table in which energy charges are associated with each energy usage amount, and calculates the second energy charge based on the second energy charge table.

Further characteristic configurations of the distributed power generation system according to the present invention are:
The control device
An energy price list that stores a second energy price list, which is a price list of energy including gas and electricity when the distributed power generation device is operated and the heat source machine uses heat from the distributed power generation device. Memory and
Based on the second energy charge table, it has an energy charge acquisition unit that acquires a second energy charge according to the amount of energy consumed.
The display control unit acquires the second energy charge from the energy charge acquisition unit and controls the display to display the second energy charge on the display unit.

According to the above-mentioned feature configuration, since the control device has the second energy charge table, the second energy charge can be easily acquired and displayed.

Further characteristic configurations of the distributed power generation system according to the present invention are:
The second energy charge is predicted based on the past record of energy utilization including at least one of gas and electricity in the facility where the distributed power generation system is installed.

According to the above characteristic configuration, the second energy charge is predicted based on the past energy usage record, and therefore is a value more suitable for the future actual condition of the facility.

Further characteristic configurations of the distributed power generation system according to the present invention are
When the distributed power generation device in which a failure has occurred is replaced with a new distributed power generation device, the display control unit operates the new distributed power generation device, and the existing heat source unit is released from the new distributed power generation device. Operate a new distributed power generation device when heat is used, or when a failed distributed power generation device or an existing heat source device is replaced with a new distributed power generation device or a new heat source device. The third energy charge, which is the cost for the energy consumption including at least one of gas and electricity, when the new heat source machine uses the heat from the new distributed power generator, is displayed above. The point is to control so that it is displayed on the unit.

According to the above-mentioned feature configuration, the user operates the new distributed power generation device when the user replaces the new distributed power generation device with a new distributed power generation device or a new distributed power generation device and a new heat source device. It is possible to grasp the third energy charge when the heat is used by the existing heat source machine or the new heat source machine. In general, the new distributed power generation device has good power generation efficiency, and the new heat source machine has good energy efficiency, so that the amount of gas and electricity used can be suppressed. Therefore, the third energy charge is lower than the energy charge when the distributed power generation device and the heat source machine that have deteriorated over time are used. Therefore, the user can grasp how much the energy charge will be cheaper than before by the exchange by presenting the third energy charge.
In addition, when the heat source machine uses the first energy charge when the heat source machine is used alone, and the heat generated by the power generation operation of the repaired distributed power generation device after repairing and operating the failed distributed power generation device. When the second energy charge of the above, the third energy charge when replaced with a new distributed power generation device and the heat source unit is presented to the user, the user can weigh the first to third energy charges. As a result, the distributed power generation device can be repaired and reused, the distributed power generation device can be stopped and the heat source unit can be used independently, the new distributed power generation device can be replaced, or a new distributed power generation device can be used. It is possible to determine whether to replace the device and the heat source machine, which improves user convenience. If the repair fee is presented to the user, the convenience of the user can be further improved.

Further characteristic configurations of the distributed power generation system according to the present invention are
The display control unit is the cost of replacing the failed distributed power generation device with a new distributed power generation device, or the new distributed power generation device from the failed distributed power generation device and the existing heat source device. The point is that the replacement fee, which is the cost when the machine is replaced with a new heat source machine, is controlled to be displayed on the display unit.

According to the above-mentioned feature configuration, the user can grasp the replacement fee when the replacement is made with a new distributed power generation device or when the replacement is made with a new distributed power generation device and a new heat source device.
When the first to third energy charges and exchange charges are presented to the user, the user can weigh the first to third energy charges and exchange charges. This makes it possible to determine whether to repair and reuse the distributed power generator, stop the distributed power generator and use the heat source unit alone, or replace it with a new distributed power generator and heat source unit. User convenience is improved. If the repair fee is presented to the user, the convenience of the user can be further improved.

The present invention is an energy charge display method in a distributed power generation system including a distributed power generation device, a control device for controlling the operation of the distributed power generation device, and a heat source machine, and the characteristic configuration thereof is as follows.
The control device
A step of detecting the presence or absence of a failure in the distributed power generation device, and
When a failure occurs in the distributed power generation device, the cost for energy consumption including at least one of gas and electricity when the distributed power generation device is stopped and the heat source device is used alone is the first prediction. 1 It has a step of controlling the energy charge to be displayed on the display unit.

This is the overall configuration of the distributed power generation system. This is an example of an energy price list. This is an example of an energy price list. This is an example of an energy price list. This is an example of an energy price list. This is an example of energy usage history. It is a block diagram of a distributed power generation device and a heat source machine. It is a block diagram of a control device. This is a display example on the display unit. It is a flowchart which shows the flow of the energy charge display method. It is another block diagram of the control device. This is a display example on the display unit. This is an example of the price of a distributed power generator. This is an example of the price of a heat source machine. This is an example of a price list for calculating the replacement cost.

[Embodiment]
The distributed power generation system according to the embodiment of the present invention will be described below. When a failure occurs in the distributed power generation device provided in the distributed power generation system according to the present embodiment, the energy required by the heat source machine and various devices when the distributed power generation device is continuously used or stopped is generated. The energy charge is displayed on the display. By displaying the energy charge, the user can obtain a criterion for selecting whether or not to carry out the procedure associated with the repair, which improves the convenience of the user. The user can also use the energy charge as a criterion for replacing at least one of the distributed power generator and the heat source unit with a new one.

(1) Configuration of Distributed Power Generation System As shown in FIG. 1, the distributed power generation system 1 has a plurality of facilities 3 (3a, 3b) each having distributed power generation devices 20 (20a, 20b ...) described later. ...), A system server 5 that manages the operating state of the distributed power generation device 20 of each facility 3, and an energy company 9 that supplies energy such as gas and electricity to each facility 3.

The control device 10 (10a, 10b ...) Of the distributed power generation device 20 (20a, 20b ...), The system server 5, and the energy company server 90 of the energy company 9 can communicate with each other via the network 8. It is connected to the.
Hereinafter, the facilities 3a, 3b ... Are collectively referred to as facility 3. When the control device 10, the distributed power generation device 20, the heat source machine 30, and various devices 40, which will be described later, are included in the facility 3a, a subscript a is added to the code number, and the code of these configurations is the code of each facility 3. It is attached in the same way.

(A) Facility Facility 3 includes a distributed power generation device 20 that generates power by receiving fuel gas, air, and the like, a heat source machine 30, various devices 40 such as home appliances, a distributed power generation device 20, and a heat source machine. It has a control device 10 for operating the 30 and various devices 40 and grasping the operating status. The control device 10, the distributed power generation device 20, the heat source machine 30, and various devices 40 will be described later.

(B) Energy company The energy company 9 is connected to each facility 3 via a supply line 92 such as a gas pipe and an electric wire, and supplies power such as grid power and energy including gas such as city gas to each facility. To do. The energy company 9 has an energy company server 90 that manages various data in the energy company 9, communication with the outside, and the like. The energy company server 90 stores the energy charge table DB90b (energy charge) in which the energy company control unit 90a and the energy charge table in which the energy amount of gas and electricity supplied by the energy company 9 and the energy charge are associated with each other are stored. (Table storage unit) (here, DB means a database. The same shall apply hereinafter). When the energy charge is requested from the outside, the energy company control unit 90a reads the energy charge for the request from the energy charge table DB 90b and transmits the energy charge to the outside.

The energy charge table DB 90b stores a gas charge table (energy charge table) which is a relationship between the amount of gas used and the charge shown in FIGS. 2 and 3. FIG. 2 is a first energy charge table showing the relationship between the amount of gas used and the first gas charge (first energy charge) when the heat source machine 30 is used alone. In the first energy charge table of FIG. 2, the gas usage amount is associated with the first gas charge including the basic charge and the unit charge.
On the other hand, FIG. 3 shows the relationship between the amount of gas used and the second gas charge (second energy charge) when the distributed power generation device 20 is operated and the heat source unit 30 uses the heat from the distributed power generation device 20. It is a second energy price list which shows. In the second energy charge table of FIG. 3, the gas usage amount is associated with the second gas charge including the basic charge and the unit charge.

When the amount of gas used is from 0 m ³ to 20 m ³ , the basic charge for the first gas charge is 750 yen and the unit charge is 190 yen per 1 m ³ in the first energy charge table in FIG. On the other hand, in the second energy charge table of FIG. 3, when the gas usage amount is from 0 m ³ to 20 m ³ , the basic charge of the second gas charge is 700 yen and the unit charge is 150 yen per 1 m ³ . Therefore, the first energy charge when gas is used as energy and the heat source machine 30 is used alone is higher than the second energy charge when the heat source machine 30 uses the heat from the distributed power generation device 20. ..

Further, the energy charge table DB 90b stores an electricity charge table (energy charge table) which is a relationship between the amount of electricity used and the charge shown in FIGS. 4 and 5. FIG. 4 is a first energy charge table showing the relationship between the amount of electricity used and the first electricity charge (first energy charge) when the heat source machine 30 is used alone. On the other hand, FIG. 5 shows the relationship between the amount of electricity used and the second electricity charge (second energy charge) when the distributed power generation device 20 is operated and the heat source unit 30 uses the heat from the distributed power generation device 20. It is a second energy price list which shows.

When the amount of electricity used is 0 to 15 kWh, the first electricity charge is 280 yen in the first energy charge table of FIG. 4, while the amount of electricity used is up to 0 to 15 kWh in the second energy charge table of FIG. The second electricity charge is 250 yen. Therefore, the first energy charge when electricity is used as energy and the heat source machine 30 is used alone is higher than the second energy charge when the heat source machine 30 uses the heat from the distributed power generation device 20. ..

(C) System server The system server 5 manages various operating states such as the amount of power generated by each distributed power generation device 20 and the presence or absence of failure, and manages energy charges and the like. Further, the system server 5 has an energy charge acquisition unit 5b and an energy usage history DB 5c.
As shown in FIG. 6, the energy usage history DB 5c stores the past energy usage history in a certain facility 3, and as an example, the annual energy usage of gas and electricity is stored for each year. There is. The energy usage history DB 5c stores the same energy usage history for each of the plurality of facilities 3.

The energy charge acquisition unit 5b acquires at least one of the first energy charge and the second energy charge as the predicted energy charge according to the energy usage history and the energy charge table in the energy usage history DB 5c.
As described above, the first energy charge is an energy charge when the heat source machine 30 is used independently, and includes a first gas charge, a first electricity charge, and the like. Further, the second energy charge is generally an energy charge when the distributed power generation device 20 is operated and the heat source unit 30 uses the heat from the distributed power generation device 20, and is the second gas charge and the second energy charge. 2 Includes electricity charges, etc.

Further explaining, when the failure detection unit 11 identifies the failure location of the distributed power generation device 20, the energy charge acquisition unit 5b uses the energy usage history of the facility provided with the distributed power generation device 20 having the failure location. Read from the history DB 5c. Examples of the energy usage history DB5c to be read include the energy usage history for the previous year, the average value of the energy usage history for a plurality of years, and the like. Then, the energy charge acquisition unit 5b transmits the energy usage history to the energy company control unit 90a, and requests a predicted energy charge according to the energy usage history.

The energy company control unit 90a calculates the first and second energy charges of the prediction based on the energy usage history based on the first and second energy charge tables of the energy charge table DB 90b, respectively, and causes the energy charge acquisition unit 5b to calculate the first and second energy charges. Send. The energy charge acquisition unit 5b acquires the first and second energy charges based on the energy usage history from the energy company control unit 90a and transmits them to the display control unit 13 described later. The display control unit 13 receives the first and second energy charges from the energy charge acquisition unit 5b and displays them on the display unit 21.

Specifically, the first and second energy charges are calculated as follows.
For example, in FIG. 6, the annual amount of gas used in 2018 is 470 m ³ (monthly average of about 39 m ³ ), and the annual amount of electricity used is 4000 kWh (monthly average of about 333 kWh).
First gas rates of 2, up to 50 m ³ exceed 20 m ³ is the basic charge 1400 yen, since it is 95 yen fee, annual is (1400 (Yen) +95 ^{(yen) × 39 (m 3))} × 12 (Month) ≈ 61260 yen. Since the first electricity charge in FIG. 4 is 25 yen up to 350 kWh over 120 kWh, the annual amount is 25 (yen) x 333 (kWh) x 12 (months) ≈99900 yen. Therefore, for example, the first energy charge for the annual forecast for 2019 is obtained from the sum of these first gas charges and the first electricity charges.

On the other hand, the second gas rates in Figure 3, until the 50 m ³ exceed 20 m ³ basic charge 1200 yen, since it is 80 yen fee, annual is (1200 (Yen) +80 (yen) × 39 ^(m 3)) × 12 (months) ≈ 51840 yen. Since the second electricity charge in FIG. 5 is 20 yen up to 350 kWh over 120 kWh, the annual amount is 20 (yen) x 333 (kWh) x 12 (months) ≈ 79920 yen. Therefore, for example, the second energy charge for the annual forecast for 2019 is obtained from the sum of these second gas charges and the second electricity charge.
As described above, each of the first and second energy charges is calculated based on the first and second energy charge tables prepared corresponding to each, and thus is calculated more accurately.

The configuration of each part of the facility 3 will be further described.
(1-2) Distributed Power Generation Device First, the distributed power generation device 20 will be described. As shown in FIG. 7, the distributed power generation device 20 includes a power generation unit 130a, a hot water storage tank 130b, and a power conversion device 120.

The electric power generation unit 130a basically generates heat by reacting fuel gas obtained by reforming raw fuel (for example, city gas 13A) with oxygen gas to generate heat, and heat of combustion exhaust gas discharged from the fuel cell 50. A heat exchanger 60 that recovers the fuel, a water purifier 75 that recovers and purifies the condensed water from the combustion exhaust gas after heat recovery by the heat exchanger 60, and a modification that recovers the condensed water purified by the water purifier 75. The quality water tank 80, the water supply unit 86 capable of supplying water to the reformed water tank 80 independently of the condensed water, and the ventilation fan 66a and the ventilation fan for lowering the housing temperature of the distributed power generation device 20. It includes a ventilator 66 including a detector 111 that measures the actual number of revolutions of 66a.

The fuel cell 50 is generated by the reformer 52 that steam reforms the raw fuel supplied through the raw material and fuel flow path 51 to generate fuel gas, and the reformer 52 via the fuel gas flow path 53. It has an anode 55 to which the fuel gas is supplied, a cathode 56 to which air (an example of oxygen gas) is supplied via the air flow path 54, and an electrolyte 57 interposed between the anode 55 and the cathode 56. The fuel gas and air supplied are reacted to generate electricity. The anode 55, the cathode 56, and the electrolyte 57 form one fuel cell 50a, and the plurality of fuel cell cells 50a form a cell stack.

The fuel cell 50 includes a combustion unit 58 to which the fuel gas and air discharged after being used for the power generation reaction from the anode 55 and the cathode 56, respectively, are supplied, and the combustion unit 58 remains in the fuel gas. The fuel component is burned to generate combustion exhaust gas.

As will be described later, water is supplied to the reformer 52 from the reforming water tank 80 via the water supply path 82, and the reformer 52 is supplied from the reforming water tank 80. Water is used for steam reforming of raw materials and fuels.

Further, the raw material / fuel flow path 51 is provided with a raw material fuel pump 41 for supplying a predetermined amount of raw material fuel to the reformer 52, and the detector 101 measures the supply amount of the raw material fuel pump 41. ..
The air flow path 54 is provided with an air blower 43 for supplying a predetermined amount of air to the cathode 56, and the detector 103 measures the amount of air supplied by the air blower 43.

The combustion exhaust gas discharged from the fuel cell 50 is supplied to the heat exchanger 60 via the exhaust gas supply path 61, and the combustion exhaust gas after heat recovery is exhausted through the exhaust gas discharge path 62. Then, the heat exchanger 60 is supplied with hot water from the hot water storage tank 130b via a circulation path 63 for circulating hot water between the hot water storage tank 130b for storing hot water and the heat exchanger 60. The heat exchanger 60 is adapted to exchange heat between the combustion exhaust gas discharged from the fuel cell 50 and hot water. The circulation path 63 includes a circulation pump 64 that supplies hot water from the hot water storage tank 130b to the heat exchanger 60, and a radiator 65 that includes a heat radiating fan 65a and a detector 107 that measures the actual rotation speed of the heat radiating fan 65a. , A temperature sensor (not shown) is provided. Further, the hot water storage tank 130b is provided with a hot water outlet 131 for discharging the hot water in the hot water storage tank 130b and a water supply channel 132 for supplying water to the hot water storage tank 130b according to the hot water discharge. The detector 105 measures the amount of hot water supplied by the circulation pump 64.

The reforming water tank 80 recovers condensed water from the combustion exhaust gas after heat recovery by the heat exchanger 60. Further, in the present embodiment, the condensed water supplied to the reforming water tank 80 is purified by the water purifier 75. Specifically, the condensed water recovery path from the combustion exhaust gas flowing through the exhaust gas discharge path 62. The condensed water is collected in the water purifier 75 via the water purifier 75, and the condensed water purified by the water purifier 75 is collected in the reformed water tank 80 via the condensed water recovery path 81. The reforming water tank 80 and the reformer 52 are connected by a water supply path 82 and a water supply path 85, and a reforming water pump provided between the water supply path 82 and the water supply path 85. By the operation of 83, the condensed water (and the water supplied from the water supply unit 86) stored in the reforming water tank 80 can be supplied to the reformer 52. The reforming water tank 80 is provided with a water level detector 84 so that the water level in the reforming water tank 80 can be detected.
Further, water can be supplied to the reforming water tank 80 from the water supply unit 86 independently of the condensed water.

Further, the distributed power generation device 20 includes a power conversion device 120. The power conversion device 120 uses the DC voltage of the DC power generated by the distributed power generation device 20 as the commercial power of the commercial power system so that the distributed power generation device 20 and the commercial power system can be connected to each other. Converts to AC voltage (system power). Further, the power conversion device 120 is provided with a detector 121 that detects the conversion efficiency from the DC voltage to the AC voltage.

As described above, in order to detect the failure location of the distributed power generation device 20, for example, detectors such as detectors 101, 103, 105, 107, 111 and a water level detector 84 are provided. The failure detection unit 11, which will be described later, detects the failure location of the distributed power generation device 20 based on the detection results from these detectors. However, these detectors are merely examples, and detectors can be arranged in other parts so as to be able to detect failures in all parts of the distributed power generation device 20.

(1-3) Heat source machine As shown in FIG. 1, the hot water supply passage 131 for discharging hot water from the hot water storage tank 130b is connected to the hot water supply passage 133 via a water supply switching three-way valve 31. The heat source machine 30 is provided in the hot water supply passage 133, and receives hot water from the hot water storage tank 130b via the water supply switching three-way valve 31. The water supply switching three-way valve 31 is a valve capable of adjusting the flow rate of hot water from the hot water storage tank 130b and the amount of water supplied from the water supply channel 132.
The heat source machine 30 has a heat exchanger h that heats hot water flowing through the hot water supply passage 133, a burner b that heats the heat exchanger h, and a fan f that supplies combustion air to the burner b.
The hot water outlet 131 is provided with a hot water storage outlet temperature sensor (not shown) that detects the temperature of hot water that is discharged from the hot water storage tank 130b and flows through the hot water channel 131. Further, the hot water supply passage 133 is provided with a hot water supply temperature sensor (not shown) that detects the temperature of hot water flowing out of the heat source machine 130 and flowing through the hot water supply passage 133.

The heat source machine 130 is controlled by the operation control unit 22 of the control device 10 described later based on the temperature of the hot water flowing through the hot water supply passage 131 and the temperature of the hot water flowing through the hot water supply passage 133, and is desired from the hot water supply passage 133. Supply hot water at the temperature of.
For example, the operation unit (not shown) of the control device 10 receives a desired temperature of hot water supplied from the hot water supply path 133 from the user. When the temperature of the hot water supplied from the hot water storage tank 130b via the hot water outlet 131 is lower than the desired temperature, the operation control unit 22 operates the heat exchanger h, the burner b, the fan f, etc. to obtain the hot water. Heat to the temperature of. In this case, the operation control unit 22 can control the water supply switching three-way valve 31 so as not to accept the water supply from the water supply channel 132 and to supply the hot water from the hot water storage tank 130b to the heat source machine 30.

Further, the operation control unit 22 stops the operation of the heat exchanger h, the burner b, the fan f, etc. when the temperature of the hot water supplied from the hot water storage tank 130b via the hot water outlet 131 is higher than the desired temperature. Further, the operation control unit 22 controls the water supply switching three-way valve 31 so that the temperature of the hot water supplied from the water supply channel 132 becomes a desired temperature. That is, the operation control unit 22 can adjust the amount of water supplied from the water supply channel 132 added to the hot water from the hot water storage tank 130b to lower the hot water to a desired temperature.
When the temperature of the hot water supplied from the hot water storage tank 130b via the hot water outlet 131 is a desired temperature, the operation control unit 22 supplies the hot water from the hot water storage tank 130b as it is from the hot water supply channel 133. In this case, the operation control unit 22 stops the operation of the heat exchanger h, the burner b, the fan f, and the like. Further, the operation control unit 22 can control the water supply switching three-way valve 31 so that the water supply from the water supply channel 132 is not received and the hot water from the hot water storage tank 130b is supplied to the heat source machine 30.

(1-4) Control device As shown in FIG. 8, the control device 10 includes a failure detection unit 11, a display control unit 13, a selection reception unit 15, a mode switching unit 17, a display unit 21, and an operation control unit. It has 22 and. Further, the control device 10 has an operation unit (not shown), and receives various inputs from the user such as operation and stop of the distributed power generation device 20 and the temperature of hot water supply from the hot water supply path 133. The control device 10 of the present embodiment is composed of, for example, a remote controller or the like that can accept various inputs from the user.

The operation control unit 22 operates and stops the distributed power generation device 20 and the like, supplies and discharges water to the hot water storage tank 130b, supplies hot water to the heat source machine 30 via the hot water passage 131, and supplies water to the heat source machine 30. It controls the supply of hot water through the hot water, the heating of hot water in the heat source machine 30, and the like.

If the detection results from the detectors 101, 103, 105, 107, 111, the water level detector 84, etc. indicate an abnormal value, the failure detection unit 11 is provided with a detector in which the abnormal value is detected. Is specified as a failure location of the distributed power generation device 20. The faulty part is represented as, for example, an error coat.
The failure detection unit 11 transmits the failure location of the distributed power generation device 20 to the energy charge acquisition unit 5b of the system server 5. The energy charge acquisition unit 5b acquires the energy charge based on the failure location and transmits it to the display control unit 13. The display control unit 13 receives energy charges (first energy charge and second energy charge) from the energy charge acquisition unit 5b. Then, as shown in FIG. 10, the display control unit 13 causes the display unit 21 to display the energy charge (first energy charge, second energy charge) according to the failure location detected by the failure detection unit 11. Control.

Further, the display control unit 13 displays on the display unit 21 the first selection of stopping the distributed power generation device 20 and using the heat source unit 30 independently and the second selection of repairing the failure of the distributed power generation device 20. To control. As shown in FIG. 9, the display unit 21 has a heat source machine independent use icon 203 (icon for first selection) in which the distributed power generation device 20 is stopped and the heat source machine 30 is used independently, and the distributed power generation device 20. A repair icon 201 (an icon for the second selection) for selecting to repair the failure of the above is displayed.

The first selection is a selection when the heat source machine 30 is operated independently and the heat source machine 30 is operated by receiving energy such as gas and electricity outside the distributed power generation system 1. The second option is a selection in which the distributed power generation device 20 is repaired and operated, and the heat source machine 30 uses the heat generated by the power generation operation of the distributed power generation device 20.

The heat source machine single use icon 203 and the repair icon 201 constitute the selection reception unit 15. When the user presses either the heat source machine independent use icon 203 (the icon for the first selection) or the repair icon 201 (the icon for the second selection), the selection reception unit 15 is selected from the first selection and the second selection. The one with the pressed icon is accepted as selected.

Further explanation will be given to the display of energy charges.
Assuming that the repair icon 201 shown in FIG. 9 is selected, that is, the failure of the distributed power generation device 20 is repaired and operated, and the heat generated by the power generation operation of the distributed power generation device 20 after the repair is used for the heat source machine 30 and various types. Approximately 140,000 yen is displayed as the predicted second energy charge when the device 40 is assumed to be used. Here, the heat source machine 30 and various devices 40 utilize energy such as heat generated by the power generation operation of the distributed power generation device 20, and the shortage is supplied with energy such as gas and electricity from the energy company 9.

Further, assuming that the heat source unit single use icon 203 is selected, that is, assuming that the distributed power generation device 20 is stopped without repair and the heat source unit 30 is used independently, as the first energy charge for prediction. About 250,000 yen is displayed. Here, since the heat source machine 30 and the various devices 40 cannot receive heat from the distributed power generation device 20, they receive energy such as gas and electricity from the energy company 9.

As described above, by displaying the first energy charge on the display unit 21, the user can grasp the first energy charge when the distributed power generation device 20 is stopped and the heat source unit 30 is used independently. it can. Therefore, the user can obtain the first energy charge as a criterion for selecting whether or not to perform the procedure associated with the repair, which improves the convenience of the user.

In addition, various procedures associated with repair include, for example, detailed failure diagnosis of the failure location and condition, estimation of the actual actual repair fee based on the result of the failure diagnosis, purchase of a new distributed power generation device, purchase of a new heat source machine, etc. included.
In addition, the failure includes not only the case where at least a part of the power generation device cannot generate power due to the failure, but also the case where the power generation device and its components operate but do not meet the expected operation. Is done.

When the heat source unit 30 was used alone, the power generated by the distributed power generation device 20 was used in the facility 3, and the profits enjoyed by not purchasing the grid power and the generated power were obtained by reversing the tide. Profit, the price of the power purchased from the grid power of the electric power company (energy company 9) was cheaper by using the distributed power generation device 20. Profit, the gas company (energy) by using the distributed power generation device 20 It will not be possible to obtain profits, etc., where the price of gas purchased from company 9) has been reduced. In consideration of these points and the like, the user can determine whether or not to perform the repair by referring to the first energy charge. The user can also use the first energy charge as a criterion for replacing at least one of the distributed power generation device 20 and the heat source machine 30 with a new one.

Further, by displaying the first energy charge, for example, the user pays for the first energy charge if the repair is not performed, but by paying the repair charge and repairing the distributed power generation device 20. It is possible to obtain the above-mentioned various benefits and determine whether or not the repair fee can be recovered.
For example, if the first energy charge is high, the user may choose to repair and reuse the distributed generator 20. On the other hand, for example, when the first energy charge is low, the user can choose to stop the distributed power generation device 20 without repairing it and use the heat source machine 30 independently.
If the user desires repair even when the first energy charge is low, the user can choose to repair and reuse the distributed power generation device 20. Further, even when the first energy charge is high, the user can choose to stop the distributed power generation device 20 and use the heat source machine 30 independently.

In addition, regardless of whether the user desires or does not want to repair the failure of the distributed power generation device 20, a visit fee is incurred according to the visit by the serviceman and the diagnosis of the failure location and state. However, according to the above configuration, the user can check the energy charge without paying the visit fee.

Further, when the second energy charge is displayed on the display unit 21, the user repairs and operates the distributed power generation device 20, and the heat source machine 30 uses the heat generated by the power generation operation of the repaired distributed power generation device 20. It is possible to grasp the second energy charge when the power is generated. Therefore, as in the case of the first energy charge described above, the user can obtain the second energy charge as a criterion for selecting whether or not to perform the procedure associated with the repair, which improves the convenience of the user. The user can also use the second energy charge as a criterion for whether or not at least one of the distributed power generation device 20 and the heat source machine 30 is replaced with a new one.

In particular, in the above embodiment, since both the first energy charge and the second energy charge are displayed on the display unit 21, the user repairs the distributed power generation device 20 by weighing the first energy charge and the second energy charge. It is possible to determine whether to reuse the energy source unit 30 or to stop the distributed power generation device 20 and use the heat source unit 30 independently, which improves the convenience of the user.

For example, the user can see that if the distributed power generation device 20 is not repaired, the first energy charge is paid, and if the distributed power generation device 20 is repaired, the repair charge and the second energy charge are paid. Since the second energy charge is generally cheaper than the first energy charge, it is possible to judge whether or not the repair charge can be recovered even if the repair is performed by paying the repair charge.
As shown in FIG. 9, a repair fee of, for example, about 30,000 yen may be displayed on the display unit 21.

Further, the side managing the distributed power generation device 20 can also perform the work based on the user's judgment as to whether or not to perform the repair. Therefore, when it is unclear whether or not to repair, it is possible to reduce complicated work such as visiting the facility 3 in which the distributed power generation device 20 in which the failure has occurred is installed and diagnosing the failure location.

When the selection reception unit 15 accepts the input of the heat source machine independent use icon 203, that is, when the mode switching unit 17 receives the selection to stop the distributed power generation device 20 and use the heat source machine 30 independently, the mode switching unit 17 causes the heat source machine 30 to be used. Switch to a mode that can be used independently. The mode switching unit 17 stops the distributed power generation device 20 without repairing the mode switching unit, and makes the heat source machine 30 available independently.
The mode switching unit 17 stops the power generation in the distributed power generation device 20 and stops the supply of electric power from the power conversion device 120 to the heat source machine 30 when the heat source machine 30 is used independently. Further, the mode switching unit 17 completely stops the operation of each part of the distributed power generation device 20, such as the circulation pump 64 and the radiator 65, or controls so that the operation of each part is minimized.

Since the mode switching unit 17 stops the supply of energy from the distributed power generation device 20 to the heat source machine 30, it is possible to omit the work of the serviceman visiting the site and setting to switch to the mode in which the heat source machine is used independently.

On the other hand, when the selection reception unit 15 accepts the input of the repair icon 201, the selection reception unit 15 transmits a repair request to the system server 5. When the system server 5 sends a repair request to the system of a repair company (not shown), the repair company dispatches a repair person to the facility 3 where the distributed power generation device 20 in which the failure has occurred is installed, and the repair work is performed. Will be done.

In the above, the control device 10 includes a failure detection unit 11, a display control unit 13, a selection reception unit 15, a mode switching unit 17, a display unit 21, and an operation control unit 22. However, the control device 10 may have, for example, any of these functional units. For example, the control device 10 has a failure detection unit 11 and a display control unit 13, and the display unit 21 may be provided in a device separate from the control device 10.

(1-5) Various devices The facility 3 is equipped with various devices 40 such as a television, a refrigerator, an air conditioner, a gas stove, and a gas stove. The electric power generated by the distributed power generation device 20, the system power from the outside of the distributed power generation system 1, gas, and the like are supplied to the various devices 40. The various devices 40 may be able to communicate with the control device 10, and the display control unit 13 may display the energy charge on the display unit 21 instead of or together with the energy on the screen (display unit) of the television, for example. It may be controlled to display the charge.
Further, the various devices 40 may include a mobile device having a display unit such as a mobile phone such as a smartphone. The display control unit 13 of the control device 10 controls to display the repair charge on the screen (display unit) instead of displaying the energy charge on the display unit 21 or by communicating with the mobile device. You may.

(2) Energy charge display method in a distributed power generation system Next, an energy charge display method will be described with reference to FIG.
Step S11: When the detection results from the detectors 101, 103, 105, 107, 111, the water level detector 84, etc. indicate an abnormal value, the failure detection unit 11 is provided with a detector in which the abnormal value is detected. The location is specified as a failure location of the distributed power generation device 20. Then, the failure detection unit 11 proceeds to step S12 on the assumption that there is a failure location (Yes in step S11). If not (No in step S11), the failure detection unit 11 continues the process of step S11.

Step S12: When the failure detection unit 11 identifies the failure location of the distributed power generation device 20, the energy charge acquisition unit 5b transmits the energy usage history in the energy usage history DB 5c to the energy company control unit 90a and records the energy usage history. Demand estimated energy charges accordingly.
The energy company control unit 90a calculates the first and second energy charges of the prediction based on the energy usage history based on the first and second energy charge tables of the energy charge table DB 90b, respectively, and causes the energy charge acquisition unit 5b to calculate the first and second energy charges. Send. The energy charge acquisition unit 5b acquires the first and second energy charges and transmits them to the display control unit 13.
Step S13: The display control unit 13 receives the first and second energy charges from the energy charge acquisition unit 5b, and displays the first and second energy charges, the repair icon 201, and the heat source unit independent use icon 203 on the display unit 21. Control to do.
Step S14: The selection reception unit 15 accepts one of the selections via the repair icon 201 (the icon for the second selection) and the heat source machine independent use icon 203 (the icon for the first selection).

Steps S15, S16: When the selection reception unit 15 receives the input of the heat source machine independent use icon 203 (Yes in step S15), the mode switching unit 17 stops the operation of the distributed power generation device 20 and separates the heat source machine 30. The mode is switched to the mode (S16).

Step S17: When the selection reception unit 15 receives the input of the repair icon 201 (No in step S15), the selection reception unit 15 transmits a repair request to the system server 5. As a result, the distributed power generation device 20 in which the failure has occurred is repaired.

[Other Embodiments]
The configurations disclosed in the above-described embodiments (including modifications, the same shall apply hereinafter) can be applied in combination with the configurations disclosed in the embodiments as long as there is no contradiction. The embodiment disclosed in the above is an example, and the embodiment of the present invention is not limited to this, and can be appropriately modified without departing from the object of the present invention.
(1) In the above embodiment, the energy charge acquisition unit 5b requests the energy company control unit 90a for a predicted energy charge according to the energy usage history. The energy charge acquisition unit 5b causes the display control unit 13 to control the display of the energy charge acquired by the energy company control unit 90a based on the energy usage history and the energy charge table.

However, the method of obtaining the first and second energy charges is not limited to this.
(A) For example, the energy company control unit 90a may transmit the energy charge table of FIGS. 2 to 5 to the energy charge acquisition unit 5b in response to the request of the energy charge acquisition unit 5b. In this case, the energy charge acquisition unit 5b may acquire the energy charge by referring to the energy usage history in the energy usage history DB 5c and the energy charge table. Here, the energy price list includes at least one of the first energy price list and the second energy price list.

In addition, the system server 5 has an energy charge table DB similar to the energy charge table DB 90b, and may have the energy charge table of FIGS. 2 to 5 in advance. In this case, when the selection reception unit 15 accepts the selection of either the heat source machine independent use icon 203 or the repair icon 201, the system server 5 refers to the energy usage history in the energy usage history DB 5c. Further, the system server 5 refers to the energy charge held by the system server 5 and acquires the energy charge corresponding to the energy usage history. In this case, from the acquisition of the energy usage history, the acquisition of the energy charge corresponding to the energy usage history can be completed in the system server 5. The system server 5 may access the energy company server 90 and update the energy price list at any time.

Further, the energy charge table stored in the energy charge table DB 90b does not have to be a correspondence table in which the unit price of energy changes stepwise according to the amount of energy as shown in FIGS. 2 to 5. For example, one or more flat-rate energy rate plans may be stored.

(B) Further, as described above, the display control unit 13 of the control device 10 acquires the energy charge via the energy charge acquisition unit 5b of the system server 5. However, unlike this, the control device 10 itself may acquire the energy charge. In this case, the control device 10 shown in FIG. 11 includes an energy charge acquisition unit 16 and an energy charge in addition to the failure detection unit 11, the display control unit 13, the selection reception unit 15, and the mode switching unit 17 of the control device 10 of FIG. A table DB (energy charge table storage unit of the control device) 18 is provided.

The energy charge table in the energy charge table DB18 is the same as the energy charge table of FIGS. 2 to 5 above. When the selection reception unit 15 receives the selection of either the heat source machine independent use icon 203 or the repair icon 201, the energy charge acquisition unit 16 acquires the energy usage history from the energy usage history DB 5c. Further, the energy charge acquisition unit 16 refers to the energy usage history and the energy charge table in the energy charge table DB18, and acquires the energy charge corresponding to the energy usage history. In this case, from the acquisition of the energy usage history, the acquisition of the energy charge corresponding to the energy usage history can be almost completed in the control device 10.
The energy charge table of the energy charge table DB 18 may be updated at any time according to the energy charge table DB 90b of the energy company server 90.
Further, the control device 10 does not acquire the energy usage history from the energy usage history DB 5c of the system server 5, but the control device 10 itself may have the energy usage history DB 5c.

Further, although the control device 10 includes the energy charge acquisition unit 16, the control device 10 does not have to include the energy charge table DB 18. In this case, the energy charge acquisition unit 16 may request the energy charge from the energy company control unit 90a of the energy company server 90 and acquire the energy charge corresponding to the energy usage history in the energy charge table DB 90b.

When the control device 10 itself acquires the energy charge as described above, the system server 5 does not need to be provided with the energy charge acquisition unit 5b. Further, it is not necessary that the energy company server 90 is provided with the energy charge table DB 90b. In this case, in the distributed power generation system 1 shown in FIG. 1, at least one of the system server 5 and the energy company 9 may be omitted.

(C) Further, in the above embodiment, the system server 5 and the energy company server 90 are connected to each other via the network 8. Then, the energy charge acquisition unit 5b of the system server 5 communicates with the energy company server 90 via the network 8 to acquire the energy charge. However, the system server 5 and the energy company server 90 may be provided in one device. Communication via the network 8 is not required between the servers in one device, and the energy charge can be acquired without going through the network 8.

(2) In the above embodiment, the energy charge acquisition unit 5b acquires the energy charge based on the past energy usage history. However, the energy charge acquisition unit 5b may acquire the average energy charge of a general facility and output it to the display control unit 13.

(3) In the above embodiment, the first energy charge (energy charge when the distributed power generation device 20 is operated and the option to use the heat source unit 30 independently is accepted) and the second energy charge (distributed power generation device 20). Both (energy charges when the heat source machine 30 accepts the option of using the heat generated by the power generation operation of the distributed power generation device 20 after the repair) after repairing the failure and operating the device are displayed on the display unit 21. However, at least one of the first energy charge and the second energy charge may be displayed on the display unit 21.

(4) In the above embodiment, the acquisition of the energy charge is performed when the failure detection unit 11 identifies the failure location of the distributed power generation device 20. However, the energy charge may be acquired by the time the energy charge is displayed on the display unit 21. For example, in the energy charge acquisition by the energy charge acquisition unit 5b, after the failure detection unit 11 identifies the failure location of the distributed power generation device 20, the selection reception unit 15 uses either the heat source unit single use icon 203 or the repair icon 201. It may be started when the selection of is accepted.

(5) The energy charge may be displayed not only on the display unit 21, but also on the display unit of various devices 40 and the screen of a portable device such as a smartphone.

(6) In the above embodiment, the failure detection unit 11 detects the failure location of the distributed power generation device 20. However, the failure detection unit 11 may only identify, for example, whether or not the distributed power generation device 20 has a failure. Then, when the distributed power generation device 20 has a failure, the energy charge acquisition unit 5b acquires, for example, an energy charge based on a fixed repair plan. The display control unit 13 acquires the energy charge according to the fixed repair plan from the energy charge acquisition unit 5b and displays it on the display unit 21.

(7) In the above embodiment, the display unit 21 displays the repair icon 201 and the heat source machine independent use icon 203 in addition to the energy charge. Then, the selection reception unit 15 accepts one of the selections. However, the display unit 21 may not display the repair icon 201 and the heat source unit single use icon 203, but may display only the energy charge.

(8) In the above embodiment, the distributed power generation system 1 includes a system server 5, a repair company server 70, and an energy company server 90 in addition to the facility 3. However, the distributed power generation system 1 may be composed of only the control device 10, the distributed power generation device 20, and the heat source device 30 in the facility 3. That is, the distributed power generation system 1 does not include the system server 5, the repair company server 70, and the energy company server 90. Further, the distributed power generation system 1 may not include at least one of the system server 5, the repair company server 70, and the energy company server 90.
The exchange of various data is the same as described above, except that what is included in the distributed power generation system 1 is different.

(9) In the above embodiment, the distributed power generation device 20 includes a hot water storage tank 130b and a heat exchanger 60 as shown in FIG. However, the distributed power generation device 20 may be configured without the hot water storage tank 130b and the heat exchanger 60.

(10) In the above embodiment, as shown in FIG. 9, the display unit 21 displays the repair fee, the repair icon 201, and the heat source machine independent use icon 203. The following forms can also be mentioned as the icon for selection. As shown in FIG. 12, the display unit 21 is controlled by the display control unit 13 in addition to the repair icon 201 (icon for the second selection) and the heat source unit single use icon 203 (icon for the first selection). The exchange icons (icons for the third selection) 204 and 205 may be displayed. The third option is to replace the failed distributed power generation device 20 with a new distributed power generation device 20, or to replace the failed distributed power generation device 20 and the existing heat source device 30 with a new distributed power generation device. This is an option when replacing the device 20 with a new heat source machine 30. Among the replacement icons 204 and 205, the icon for replacing the failed distributed power generation device 20 with a new distributed power generation device 20 is the distributed power generation device new purchase icon 204. In addition, the icon for replacing the failed distributed power generation device 20 and the existing heat source machine 30 with the new distributed power generation device 20 and the new heat source machine 30 is the distributed power generation device & heat source machine new purchase icon 205. is there.

The repair icon 201, the heat source machine independent use icon 203, and the replacement icons 204 and 205 constitute the selection reception unit 15. The user can use the heat source unit single use icon 203 (first selection icon), repair icon 201 (second selection icon), distributed power generation device new purchase icon 204 (third selection icon), and distributed power generation. When any one of the device & heat source machine new purchase icon 205 (icon for third selection) is pressed, the selection reception unit 15 accepts selection from any of the icons. As a result, the user can select either replacement with a new distributed power generation device 20, replacement with a new distributed power generation device 20, or replacement with a new heat source device 30 in consideration of the displayed repair fee. Is. In addition, the user refers to the repair fee, whether or not to carry out the procedure associated with the repair, whether or not to replace with a new distributed power generation device 20, and replace with a new distributed power generation device 20 and a new heat source machine 30. It can also be used as a criterion for whether or not to do so. Therefore, the convenience of the user is improved.

It should be noted that the display unit 21 does not display all of the repair icon 201, the heat source machine independent use icon 203, the distributed power generation device new purchase icon 204, and the distributed power generation device & heat source machine new purchase icon 205. At least one of the icons may be displayed.

Further, in FIG. 9 of the above embodiment, as the energy charge, the first energy charge when the heat source unit 30 is used alone, and the distributed power generation device which has been repaired and operated by repairing the failed distributed power generation device 20 are used. The second energy charge when the heat source unit 30 is using the heat generated by the power generation operation of 20 is displayed on the display unit 21. However, the energy charge displayed on the display unit 21 is not limited to the first energy charge and the second energy charge, and as shown in FIG. 12, the third energy charge (when the exchange icons 204 and 205 are selected) described later is selected. Energy charges) may be included. Further, as shown in FIG. 12, in addition to the repair fee and the first to third energy charges, the replacement fee when replacing with a new distributed power generation device 20, and the replacement with a new distributed power generation device 20 and heat source machine 30. The exchange fee may be displayed on the display unit 21.

In FIG. 12, it is assumed that the repair icon 201 is selected, that is, the failure of the distributed power generation device 20 is repaired and operated, and the heat generated by the power generation operation is used by the heat source machine 30 and various devices 40. As the second energy charge for the forecast, about 140,000 yen is displayed. Further, assuming that the heat source unit single use icon 203 is selected, that is, assuming that the distributed power generation device 20 is stopped without repair and the heat source unit 30 is used independently, as the first energy charge for prediction. About 250,000 yen is displayed.

Further, in FIG. 12, it is assumed that the distributed power generation device new purchase icon 204 is selected, that is, it is assumed that the distributed power generation device 20 in which the failure has occurred is replaced with a new distributed power generation device 20. About 300,000 yen and about 110,000 yen are displayed as the exchange fee and the predicted third energy fee, respectively. Further, assuming that the distributed power generation device & heat source machine new purchase icon 205 is selected, that is, a new distributed power generation device 20 and a new heat source from the distributed power generation device 20 and the existing heat source machine 30 in which a failure has occurred. Assuming that the machine is replaced with the machine 30, about 400,000 yen and about 100,000 yen are displayed as the replacement fee and the predicted third energy fee, respectively.

The method of calculating the exchange fee and the third energy fee is, for example, as follows. First, the method of calculating the exchange fee will be described.
The energy charge table DB 90b of the energy company server 90 of FIG. 1 includes a replacement charge table in addition to the energy charge table. The exchange fee table includes FIGS. 13 to 15. In FIG. 13, prices are associated with each model of the new distributed power generation device 20. In FIG. 14, prices are associated with each model of the new heat source machine 30. In FIG. 15, the basic charge and excess of the cost of removing the failed distributed power generation device 20 or the existing heat source machine 30, the installation cost of the new distributed power generation device 20 or the new heat source machine 30, and the wages such as estimates. There is an hourly rate.

The energy charge acquisition unit 5b of the system server 5 in FIG. 1 sets the replacement charge when the distributed power generation device new purchase icon 204 or the distributed power generation device & heat source machine new purchase icon 205 is selected, and sets the energy of the energy company server 90. Request to the company control unit 90a. The energy company control unit 90a calculates the replacement charge based on the replacement charge table of the energy charge table DB 90b and transmits it to the repair charge acquisition unit 5a. The energy charge acquisition unit 5b acquires the replacement charge from the energy company control unit 90a and transmits it to the display control unit 13. The display control unit 13 receives the replacement charge from the energy charge acquisition unit 5b and displays it on the display unit 21 of the control device 10.

For example, it is assumed that the distributed power generation device new purchase icon 204 is selected and the distributed power generation device 20 of model B in FIG. 13 is newly purchased. In addition, the removal cost of the existing distributed power generation device 20 has an excess time of 1 hour in addition to the basic charge, and the installation cost of the new distributed power generation device 20 is the basic charge, and the basic charge may be incurred as wages. Think. In this case, based on FIGS. 13 and 15, the price of the distributed power generator of model B (250,000 yen) + the basic charge for the removal cost (20,000 yen) + the excess charge for 1 hour in the removal (5,000 yen) + A total of 300,000 yen, which is the basic installation cost (20,000 yen) + wages (5,000 yen), is the replacement fee for replacing the failed distributed power generator 20 with a new distributed power generator 20. It is calculated.

Further, for example, it is assumed that the distributed power generation device & heat source machine new purchase icon 205 is selected. It is assumed that the replacement fee for the new distributed power generation device 20 is calculated in the same manner as described above, for example, 300,000 yen. Further, it is assumed that the heat source machine 30 of the model α shown in FIG. 14 is newly purchased. Also, in relation to the new heat source machine 30, the removal cost of the existing heat source machine 30 is the basic charge, and the installation cost of the new heat source machine 30 has an overtime of 1 hour in addition to the basic charge, which is the basic wage. Consider the case where charges are incurred. In this case, based on FIGS. 14 and 15, the price of the heat source machine of model α (50,000 yen) + basic charge for removal cost (20,000 yen) + basic charge for installation cost (20,000 yen) + 1h in installation A total of 100,000 yen, which is the excess charge (5,000 yen) + wages (5,000 yen), is calculated as the replacement charge for the heat source machine 30. Therefore, a total of 400,000 yen of 300,000 yen + 100,000 yen will be replaced when the distributed power generation device 20 and the existing heat source machine 30 that have failed are replaced with a new distributed power generation device 20 and a new heat source machine 30. Calculated as a charge.

According to the above configuration, the user can grasp the replacement fee when the new distributed power generation device 20 is replaced or the new distributed power generation device 20 and the new heat source device 30 are replaced.

Next, a method of calculating the third energy charge will be described.
The third energy charge is when the new purchase icon 204 of the distributed power generation device is selected, that is, the new distributed power generation device 20 is operated, and the existing heat source machine 30 uses the heat from the distributed power generation device 20. The energy charge for the case. In addition, the third energy charge is when the distributed power generation device & heat source machine new purchase icon 205 is selected, that is, the new distributed power generation device 20 is operated, and the new heat source machine 30 is the new distributed power generation device. It is an energy charge when using the heat from 20.

As described above, the energy company 9 stores the energy charge tables shown in FIGS. 3 and 5 in the energy charge table DB 90b. FIG. 3 shows the relationship between the amount of gas used and the second gas charge (second energy charge) when the distributed power generation device 20 is operated and the heat source unit 30 uses the heat from the distributed power generation device 20. This is the second energy price list. FIG. 5 shows the relationship between the amount of electricity used and the second electricity charge (second energy charge) when the distributed power generation device 20 is operated and the heat source unit 30 uses the heat from the distributed power generation device 20. This is the second energy price list.

The energy charge acquisition unit 5b uses the energy usage history in the energy usage history DB 5c and the second energy charge table of FIGS. 3 and 5 to acquire the third energy charge as the predicted energy charge. Since the calculation method of the third energy charge is the same calculation method as the second energy charge, the description thereof will be omitted. The second energy charge table is a charge table when the distributed power generation device 20 is operated and the heat source machine 30 uses the heat from the distributed power generation device 20, and can be diverted in the calculation of the third energy charge. ..

According to the above configuration, the user can grasp the third energy charge when the new distributed power generation device 20 is replaced or the new distributed power generation device 20 and the new heat source device 30 are replaced. Can be done. In general, the new distributed power generation device 20 has good power generation efficiency, and the new heat source machine 30 has good energy efficiency, so that the amount of gas and electricity used can be suppressed. Therefore, the third energy charge is lower than the energy charge when the distributed power generation device 20 and the heat source unit 30 that have deteriorated over time are used. Therefore, the user can grasp how much the energy charge will be cheaper than before by the exchange by presenting the third energy charge.

In addition, the repair fee, the first energy charge when the heat source machine 30 is used independently, and the heat generated by the power generation operation of the repaired distributed power generation device 20 by repairing and operating the failed distributed power generation device 20 are used as the heat source machine. If the user is presented with a second energy charge when 30 is in use, a third energy charge when the new distributed power generator 20 and the heat source unit 30 are replaced, and a replacement charge, the user repairs the power. The charges and the first to third energy charges can be weighed. As a result, the distributed power generation device 20 is repaired and reused, the distributed power generation device 20 is stopped and the heat source machine 30 is used alone, the distributed power generation device 20 is replaced with a new distributed power generation device 20, or a new one. It is possible to determine whether to replace the distributed power generation device 20 and the heat source machine 30, which improves user convenience.

The method of acquiring the exchange charge is not limited to this, but the energy charge acquisition unit 5b of the system server 5 may request the energy company control unit 90a of the energy company server 90, and the energy charge acquisition unit 5b may request the energy. The exchange charge table may be obtained from the company control unit 90a to calculate the exchange charge, or the system server 5 may have the energy charge table DB 90b in which the exchange charge table is stored in advance, as shown in FIG. The energy charge acquisition unit 6 of the configured control device 10 may calculate the exchange charge based on the exchange charge table in the energy charge table DB 18.

Further, the method of acquiring the third energy charge is not limited to this, but the energy charge acquisition unit 5b of the system server 5 may request the energy company control unit 90a of the energy company server 90, or the energy charge acquisition unit 5b. May obtain an energy charge table from the energy company control unit 90a and calculate a third energy charge, or the system server 5 may have an energy charge table DB 90b in which the energy charge table is stored in advance. The energy charge acquisition unit 5b of the control device 10 configured as shown in 11 may calculate the third energy charge based on the energy charge table in the energy charge table DB 90b.

The display unit 21 does not display all of the first to third energy charges and the exchange charge, but at least one of them may be displayed.
Further, in the above, the exchange fee is acquired by the energy charge acquisition unit 5b of the system server 5. However, the system server 5 has a separate exchange charge acquisition unit (not shown), and this exchange charge acquisition unit may acquire the exchange charge.

1: Distributed power generation system 5: System server 5b: Energy charge acquisition unit 9: Energy company 10: Control device 11: Failure detection unit 13: Display control unit 15: Selection reception unit 16: Energy charge acquisition unit 17: Mode switching unit 20: Distributed power generation device 21: Display unit 30: Heat source machine 90: Energy company server 90a: Energy company control unit 201: Repair icon 203: Heat source unit independent use icon 18: Energy price list DB
5c: Energy usage history DB
90b: Energy price list DB

Claims (13)

A distributed power generation system including a distributed power generation device, a control device for controlling the operation of the distributed power generation device, and a heat source device.
The control device
A failure detection unit that detects the presence or absence of a failure in the distributed power generation device,
When a failure occurs in the distributed power generation device, the cost for energy consumption including at least one of gas and electricity when the distributed power generation device is stopped and the heat source device is used alone is the first prediction. 1 A distributed power generation system having a display control unit that controls the energy charge to be displayed on the display unit. The first energy charge is based on a first energy charge table different from the second energy charge table.
The first energy price list is a price list of energy including at least one of gas and electricity when the distributed power generation device is stopped and the heat source machine is used alone.
The second energy price list is a price list of energy including at least one of gas and electricity when the distributed power generation device is operated and the heat source machine uses heat from the distributed power generation device. The distributed power generation system according to claim 1. The display control unit is communicably connected to the control device, receives the first energy charge from a system server that manages the operating state of the distributed power generation device, and displays the first energy charge on the display unit. The distributed power generation system according to claim 1 or 2, wherein the distributed power generation system is controlled so as to be used. The display control unit is provided in an energy company that supplies energy to a facility including the heat source unit, acquires the first energy charge from an energy company server communicably connected to the control device, and obtains the first energy charge. The distributed power generation system according to claim 1 or 2, wherein the charge is controlled to be displayed on the display unit. The control device
An energy charge table storage unit that stores a first energy charge table which is an energy charge table including at least one of gas and electricity when the distributed power generation device is stopped and the heat source unit is used independently.
Based on the first energy charge table, it has an energy charge acquisition unit that acquires the first energy charge according to the energy consumption.
The distributed power generation system according to claim 1 or 2, wherein the display control unit acquires the first energy charge from the energy charge acquisition unit and controls the first energy charge to be displayed on the display unit. .. When the display control unit repairs the distributed power generation device in which the failure has occurred, the repaired distributed power generation device is operated, and the heat source machine uses the heat from the repaired distributed power generation device. The dispersion according to any one of claims 1 to 5, which controls to display the predicted second energy charge, which is the cost for the consumption of energy including at least one of gas and electricity, on the display unit. Type power generation system. The display control unit is communicably connected to the control device, receives the second energy charge from the system server that manages the operating state of the distributed power generation device, and displays the second energy charge on the display unit. The distributed power generation system according to claim 6, wherein the distributed power generation system is controlled so as to be used. The display control unit is provided in an energy company that supplies energy to a facility including the heat source unit, acquires the second energy charge from an energy company server communicably connected to the control device, and obtains the second energy charge. The distributed power generation system according to claim 6, wherein the charge is controlled to be displayed on the display unit. The control device
An energy price list that stores a second energy price list, which is a price list of energy including gas and electricity when the distributed power generation device is operated and the heat source machine uses heat from the distributed power generation device. Memory and
Based on the second energy charge table, it has an energy charge acquisition unit that acquires a second energy charge according to the amount of energy consumed.
The distributed power generation system according to claim 6, wherein the display control unit acquires the second energy charge from the energy charge acquisition unit and controls the display to display the second energy charge on the display unit. The second energy charge is predicted based on the past record of energy utilization including at least one of gas and electricity in the facility where the distributed power generation system is installed, whichever of claims 6 to 9. The distributed power generation system according to item 1. When the distributed power generation device in which a failure has occurred is replaced with a new distributed power generation device, the display control unit operates the new distributed power generation device, and the existing heat source unit is released from the new distributed power generation device. Operate a new distributed power generation device when heat is used, or when a failed distributed power generation device or an existing heat source device is replaced with a new distributed power generation device or a new heat source device. The third energy charge, which is the cost for the consumption of energy including at least one of gas and electricity, when the new heat source machine uses the heat from the new distributed power generator, is displayed above. The distributed power generation system according to any one of claims 1 to 10, which is controlled so as to be displayed on the unit. The display control unit is the cost when replacing the distributed power generation device in which the failure has occurred with a new distributed power generation device, or the distributed power generation device in which the failure has occurred and the new distributed power generation device from the existing heat source device. The distributed power generation system according to any one of claims 1 to 11, wherein the replacement fee, which is the cost when the device is replaced with a new heat source device, is controlled to be displayed on the display unit. It is an energy charge display method in a distributed power generation system including a distributed power generation device, a control device for controlling the operation of the distributed power generation device, and a heat source device.
The control device
A step of detecting the presence or absence of a failure in the distributed power generation device, and
When a failure occurs in the distributed power generation device, the cost for energy consumption including at least one of gas and electricity when the distributed power generation device is stopped and the heat source machine is used alone is the first of the predictions. (1) An energy charge display method including a step of controlling the energy charge to be displayed on the display unit.

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