JP2012132355A - Stationary cogeneration system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stationary cogeneration system capable of appropriately supplying electric power and heat as necessary by changing thermoelectric ratio continuously.SOLUTION: A motive power is provided by operating an engine 2, the motive power is distributed to a power generator 4 and a compressor 6 for a heat pump by a planetary gear 3, and the power generator 4 and the compressor 6 for a heat pump are driven by the distributed motive power. When the motive power provided by the engine 2 is distributed to the power generator 4 and the compressor 6 for a heat pump by the planetary gear 3, a load of the power generator 4 and a load of the compressor 6 for a heat pump are adjusted by an ECU 14, thereby, the motive power distributed to the power generator 4 and the motive power distributed to the compressor 6 for a heat pump are changed continuously, and the amount of electric power provided by the power generator 4 and the heat amount provided by a heat pump are changed continuously.

Description

  The present invention relates to a stationary cogeneration system.

2. Description of the Related Art Conventionally, there is known a cogeneration system (cogeneration system) that obtains electric power by driving a generator with an engine that uses liquid fuel or city gas as fuel, and that collects exhaust heat from the engine and uses it as a heat source. . In recent years, this cogeneration system has attracted attention from the viewpoint of CO ₂ reduction and energy saving. For example, an engine cogeneration system described in Patent Document 1 below includes a plurality of engine generators composed of a combination of an engine and a generator, a power load composed of household appliances such as lighting equipment, and heat for recovering engine cooling heat. It is equipped with an exchanger, a heat exchanger for recovering engine exhaust gas heat, and a heat load such as hot water supply equipment and air conditioning equipment in the home, and each engine is rotated to drive each generator. The electric power obtained by the above is supplied to the electric power load, and the exhaust heat recovered by each heat exchanger is supplied to the heat load. Then, by rotating each engine in a plurality of operation modes with different power generation efficiency and exhaust heat amount, the thermoelectric ratio, which is the ratio between the power output and the heat output of this engine cogeneration system, is controlled to control the power demand and the heat demand. It is said that an efficient engine cogeneration system can be obtained.

JP 2005-163624 A

  However, in the above-mentioned engine cogeneration system, the thermoelectric ratio is changed only by the control in a plurality of operation modes, and the change of the thermoelectric ratio becomes stepwise only by such control. As a result, the amount of power supply or heat supply is increased compared to the demand for power or heat, and energy that is not utilized but is wasted can be generated.

  The present invention has been made to solve such problems, and provides a stationary combined heat and power supply system capable of appropriately supplying power and heat according to demand by continuously changing the thermoelectric ratio. For the purpose.

  The stationary combined heat and power supply system of the present invention includes an engine, a generator driven by power obtained by the engine, a heat pump compressor driven by power obtained by the engine, and power obtained by the engine for the generator and heat pump. Power distribution means for distributing to the compressor and capable of continuously changing the power distributed to the generator and the power distributed to the heat pump compressor is provided.

  In the present invention, power is obtained by operating the engine, and this power is distributed to the generator and the heat pump compressor by the power distribution means, and the generator and the heat pump compressor are driven by the distributed power. When the power obtained by the engine is distributed to the generator and the heat pump compressor by the power distribution means, the power distributed to the generator and the power distributed to the heat pump compressor are continuously changed. Therefore, the amount of electric power obtained by the generator and the amount of heat obtained by the heat pump can be continuously changed. Therefore, the thermoelectric ratio, which is the ratio between the amount of power obtained by the generator and the amount of heat obtained by the heat pump, can be continuously changed, and power and heat can be appropriately supplied according to demand.

  Here, the power distribution means may include a power distribution mechanism that distributes the power obtained by the engine to the generator and the heat pump compressor, and an adjustment means that adjusts the load on the generator and the heat pump compressor. preferable. If it carries out like this, a power distribution means can be set as a simple structure.

  Moreover, it is preferable to provide the compressor drive means which drives the compressor for heat pumps using external electric power. In this case, it is cheaper to obtain heat by driving the heat pump compressor using external power such as commercial power to obtain heat, rather than driving the engine and driving the heat pump compressor. In addition, the engine can be stopped and the heat pump compressor can be driven using external electric power, so that the operating cost can be reduced.

  Moreover, it is preferable to provide a compressor stop means for stopping the drive of the heat pump compressor and distributing all the power obtained by the engine to the generator. In this way, when there is no heat demand and only electric power demand, etc., it becomes possible to use all the power obtained by the engine for power generation by the generator, and to efficiently generate power.

  Also, compressor driving means for driving the heat pump compressor using external power, compressor stopping means for stopping the driving of the heat pump compressor, and distributing all the power obtained by the engine to the generator, and necessary An operation mode setting means for setting the operation mode based on the amount of heat and the private power generation cost, and the operation mode setting means distributes at least the power obtained by the engine to the generator and the heat pump compressor. And a second operation mode in which the driving of the compressor for the heat pump is stopped by the compressor stopping means, and all the power obtained by the engine is distributed to the generator, and only the heat pump compressor uses external power by the compressor driving means. It is preferable that it is possible to set the third operation mode for driving. In this way, it is possible to appropriately set the operation mode based on the user needs and costs.

  ADVANTAGE OF THE INVENTION According to this invention, the stationary type combined heat and power supply system which can supply electric power and heat appropriately according to a demand by changing a thermoelectric ratio continuously can be provided.

It is a block diagram which shows the stationary type combined heat and power supply system which concerns on 1st Embodiment of this invention. It is a schematic sectional drawing which shows the planetary gear in the stationary type cogeneration system shown in FIG. It is a flowchart which shows operation | movement of the stationary type combined heat and power system shown in FIG. It is a schematic block diagram which shows operation | movement of the principal part when the stationary type cogeneration system shown in FIG. 1 is drive | operating by the 1st operation mode. It is a schematic block diagram which shows operation | movement of the principal part when the stationary type cogeneration system shown in FIG. 1 is drive | operating by 2nd operation mode. It is a schematic block diagram which shows operation | movement of the principal part when the stationary type cogeneration system shown in FIG. 1 is drive | operating by 3rd operation mode. It is a block diagram which shows the stationary type combined heat and power supply system which concerns on 2nd Embodiment of this invention. It is a schematic block diagram which shows operation | movement of the principal part when the stationary type cogeneration system shown in FIG. 7 is drive | operating by the 1st operation mode. It is a schematic block diagram which shows operation | movement of the principal part when the stationary type cogeneration system shown in FIG. 7 is drive | operating by 2nd operation mode. It is a schematic block diagram which shows operation | movement of the principal part when the stationary type cogeneration system shown in FIG. 7 is drive | operating by 3rd operation mode.

  DESCRIPTION OF EMBODIMENTS Hereinafter, a preferred embodiment of a stationary combined heat and power supply system of the present invention will be described in detail with reference to the drawings. In addition, the same code | symbol is attached | subjected to the same element and the overlapping description is abbreviate | omitted.

  FIG. 1 is a block diagram showing a stationary combined heat and power system according to a first embodiment of the present invention.

  The stationary cogeneration system 1A is a system that is installed in an office, a house, or the like, and supplies electric power and heat to the office, the house, or the like by operating an engine that uses liquid fuel, city gas, or the like as fuel. This stationary cogeneration system 1A includes an engine 2, a planetary gear (power distribution mechanism) 3, a generator 4, a motor (compressor drive means) 5, a heat pump compressor 6, a power conversion mechanism 7, a power distributor 8, A condenser 9, a hot water supply device 10, an expansion valve 11, an evaporator 12, a cooling device 13, an ECU 14, and a user cost calculation unit 15 are provided.

  The engine 2 is for obtaining power by burning liquid fuel or city gas. The engine 2 may be a single cylinder or a multi-cylinder.

  The planetary gear 3 is for distributing the power obtained by the engine 2 to the generator 4 and the heat pump compressor 6.

  FIG. 2 is a schematic cross-sectional view showing a planetary gear in the stationary cogeneration system shown in FIG.

  The planetary gear 3 includes a ring gear 31, a planetary carrier 32, and a sun gear 33. The ring gear 31 is connected to the heat pump compressor 6 via the motor 5 (see FIG. 1), the planetary carrier 32 is connected to the engine 2, and the sun gear 33 is connected to the generator 4. Then, the planetary carrier 32 is rotated by the power obtained by the engine 2, and the ring gear 31 and the sun gear 33 are rotated by this rotation, so that the power obtained by the engine 2 is distributed to the generator 4 and the heat pump compressor 6. Is done.

  Returning to FIG. 1, the generator 4 is for generating power by driving with the power obtained by the engine 2, and supplies the generated power to the power conversion mechanism 7.

  The power conversion mechanism 7 is an AC / DC converter, an inverter, or the like for converting the power generated by the generator 4 into household AC power, and supplies the converted power to the power distributor 8.

  The power distributor 8 is for distributing the power generated by the generator 4 to the commercial power line L1 and the household power line L2. The electric power distributed to the commercial power line L1 is supplied to an electric power company and sold, and the electric power distributed to the household electric power line L2 is an electric device such as an office or a house where the stationary heat and power supply system 1A is installed. To be supplied. Further, the power distributor 8 can take in commercial power (external power) from the commercial power line L <b> 1 and supplies the fetched commercial power to the power conversion mechanism 7.

  The motor 5 is for driving the heat pump compressor 6 using commercial power, and is driven by the commercial power supplied from the power conversion mechanism 7. The drive of the heat pump compressor 6 by the motor 5 is transmitted, for example, to the shaft 51 connecting the planetary gear 3 and the heat pump compressor 6 by a gear mechanism (not shown) by the gear mechanism (not shown). The compressor 6 for heat pump may be driven by rotating 51, and for example, the compressor 51 for heat pump is driven by rotating the shaft 51 by directly using the shaft 51 as a rotor of the motor 5. May be.

  The heat pump compressor 6 constitutes a heat pump together with the condenser 9, the expansion valve 11 and the evaporator 12, and is driven by the power obtained by the engine 2 or the power obtained by driving the motor 5, and the refrigerant flowing through the heat pump is supplied. Compress.

  The condenser 9 exchanges heat between the refrigerant that has been compressed by the heat pump compressor 6 into a high-temperature gas and the water stored in the hot water supply device 10, and heats the water stored in the hot water supply device 10. To do. Moreover, the hot water supply apparatus 10 supplies the stored water to the engine 2 as cooling water, collects exhaust heat from the engine 2, and heats the stored water by the exhaust heat. As described above, the hot water supply device 10 functions as a heat storage unit that stores heat obtained by driving the heat pump compressor 6 and exhaust heat from the engine 2.

  The expansion valve 11 expands the refrigerant that has released heat in the condenser 9 and has become a medium-temperature liquid. The evaporator 12 performs heat exchange between the refrigerant that has been expanded by the expansion valve 11 to become a low-temperature liquid and the air taken into the cooling device 11, and cools the air taken into the cooling device 11.

  The ECU 14 is for performing control of the entire stationary cogeneration system 1A, and is configured mainly by a computer including a CPU, a ROM, and a RAM, for example. The ECU 14 includes an engine 2, a generator 4, a motor 5, a heat pump compressor 6, a power conversion mechanism 7, a power distributor 8, a condenser 9, a hot water supply device 10, an expansion valve 11, an evaporator 12, a cooling device 13, and the like. Connected with.

  The ECU 14 adjusts the load of the generator 4 and the load of the heat pump compressor 6 to thereby distribute the power distributed from the planetary gear 3 to the generator 4 and the power distributed from the planetary gear 3 to the heat pump compressor 6. It is possible to change continuously. As a method for adjusting the load of the generator 4 and the load of the heat pump compressor 6, for example, based on a signal from the ECU 14, the power conversion mechanism 7 changes the electric resistance of the generator 4 and the motor 5 to generate power. A part of the electric power generated by the machine 4 is supplied to the motor 5 to drive the motor 5, and the power generated by this driving assists the rotation of the compressor 6 directly connected to the motor 5. And the load of the heat pump compressor 6 are adjusted. In this manner, the ECU 14 functions as an adjusting unit that adjusts the load of the generator 4 and the load of the heat pump compressor 6. Then, the planetary gear 3 and the ECU 14 distribute the power obtained by the engine 2 to the generator 4 and the heat pump compressor 6, and the power distributed to the generator 4 and the power distributed to the heat pump compressor 6. It functions as a power distribution means that continuously changes.

  Further, the ECU 14 adjusts the load of the motor 5 or the load of the heat pump compressor 6 (increasing the load of the motor 5 or the load of the heat pump compressor 6), so that the motor 5 is driven by the power from the planetary gear 3. In addition, the heat pump compressor 6 can be prevented from rotating. In this manner, the ECU 14 functions as a compressor stop unit that stops driving the heat pump compressor 6 and distributes all the power obtained by the engine 2 to the generator 4.

Further, ECU 14 is capable to load the stationary cogeneration system power amount required for the 1A (power _{demand) E in} and heat (temperature _{required) T in.} The power request E _in and the temperature request T _in are provided with an input means for the user to input them, and the user may directly input them, or the past and present in the stationary cogeneration system 1A. Calculation means for calculating the power demand E _in and the temperature demand T _in from the power supply amount, the heat supply amount, and the like may be provided and automatically calculated by this calculation means. Then, the ECU 14 can calculate the required power generation amount x and the required heat amount y based on the power request E _in and the temperature request T _in , and further calculate the thermoelectric ratio x / y based on these. .

As described above, in the stationary combined heat and power supply system 1 </ b> A, the water stored in the hot water supply apparatus 10 can be heated by driving the heat pump compressor 6 and recovering exhaust heat from the engine 2. Here, when the required heat quantity y is small, there are cases where it is more cost-effective to supply heat only by recovering exhaust heat from the engine 2 without driving the compressor 6 for heat pump. Therefore, the ECU 14 determines the engine drive determination heat amount y _E for determining whether or not to drive the engine 2 and the heat pump drive determination heat amount y _H for determining whether or not to drive the heat pump compressor 6. I remember it. Then, ECU 14 may need heat y, a drive determination heat _{y E} and the heat pump drive determining heat _{y H,} based on the commercial power cost _{A out} and private power cost _{A in} later, the operation mode of the stationary cogeneration system 1A It functions as an operation mode setting means for setting. As the operation mode, for example, the first operation mode in which the power obtained by the engine 2 is distributed to the generator 4 and the heat pump compressor 6, and the drive of the heat pump compressor 6 is stopped by the ECU 14 and obtained by the engine 2. It is possible to set a second operation mode in which all power is distributed to the generator 4 and a third operation mode in which only the heat pump compressor 6 is driven using commercial power by the motor 5.

The user cost calculation unit 15 functions as a user cost calculation unit that calculates the private power generation cost A _in that the user bears in operating the stationary cogeneration system 1A. The user cost calculation unit 15 reads external environmental conditions such as the outside air temperature T _out , the price of the fuel combusted by the engine 2, the commercial power cost A _out according to the time zone for each season, and the power sales price to the power company. It is possible. Then, the user cost calculation unit 15 calculates the private power generation cost A _in based on the outside air temperature _Tout , the fuel charge, and the like.

  Next, the operation of the stationary cogeneration system 1A will be described.

  FIG. 3 is a flowchart showing the operation of the stationary cogeneration system shown in FIG.

  First, the operation of the stationary combined heat and power system 1A starts when the ECU 14 determines whether or not the stationary combined heat and power system 1A operates normally (step S10).

When it is determined in step S10 that the stationary combined heat and power system 1A operates normally, the user cost calculation unit 15 determines the external environmental conditions such as the outside air temperature T _out , the fuel fee, the commercial power cost A _out and the power selling fee. Loading calculating private power generation cost _{a in,} and transmits the private power generation cost _{a in} ECU 14 in conjunction with the external environmental conditions (step S12).

Next, the ECU 14 reads the power request E _in and the temperature request T _in (step S14).

Next, the ECU 14 calculates the required power generation amount x and the required heat amount y based on the read power request E _in and temperature request T _in (step S16).

  Next, the ECU 14 calculates a thermoelectric ratio x / y based on the calculated required power generation amount x and required heat amount y (step S18). The power distributed to the generator 4 and the power distributed to the heat pump compressor 6 are determined by the thermoelectric ratio x / y.

  Next, the ECU 14 sets the operation mode of the stationary operation system 1A (step S20). Set the operation mode according to the following procedure.

When the necessary heat amount y satisfies the following equation (1) and the private power generation cost A _in satisfies the following equation (2), the ECU 14 sets the operation mode to the first operation mode. That is, the first operation mode is greater than the sum of the required heat quantity y is the engine drive determination heat y _E and the heat pump drive determining heat y _H, and, for private power generation cost A _in cheaper than commercial power cost A _out, the engine 2 is driven to drive the generator 4 and the heat pump compressor 6 to generate power and to supply heat by driving the heat pump compressor 6 and recovering exhaust heat from the engine 2.
y> y _E + y _H (1)
A _out > A _in (2)

When the necessary heat amount y satisfies the following formula (3) and the following formula (4) and the private power generation cost A _in satisfies the above formula (2), the ECU 14 sets the operation mode to the second operation mode. That is, the second operation mode is greater than it needs heat y is smaller than the sum of the engine-driven determination heat y _E and the heat pump drive determining heat y _H engine drive determination heat y _E, and private power cost A _in commercial Since it is cheaper than the power cost _Aout , the engine 2 is driven and only the generator 4 is driven to generate power, and heat is supplied only by recovering exhaust heat from the engine 2.
y <y _E + y _H (3)
y> y _E (4)

When the necessary heat amount y satisfies the following equation (5) and the private power generation cost A _in satisfies the following equation (6), the ECU 14 sets the operation mode to the third operation mode. That is, the third operation mode, there is a need heat y, and since the commercial power cost A _out is cheaper than private power cost A _in, without generation by the generator 4 to stop the engine 2, the commercial power Is used to drive the heat pump compressor 6 to supply heat.
y> 0 (5)
A _out <A _in (6)

When the necessary heat amount y satisfies the following equation (7) and the private power generation cost A _in satisfies the above equation (6), the ECU 14 sets the operation mode to the fourth operation mode. That is, the fourth operation mode, there is no need heat y, and since the commercial power cost A _out is cheaper than private power cost A _in, the engine 2, to stop all of the generator 4 and the heat pump compressor 6 It is.
y = 0 ... (7)

  Next, the ECU 14 determines whether or not the operation mode set in step S20 corresponds to one of the first to third operation modes (step S22).

  When it is determined in step S22 that the operation mode corresponds to one of the first to third operation modes, the ECU 14 transmits a signal to each element, and the stationary cogeneration system 1A operates in the operation mode set in step S20. An operation process corresponding to the above is executed (step S24).

Here, FIGS. 4 to 6 are schematic block diagrams showing the operation of the main part when the stationary combined heat and power supply system shown in FIG. 1 is operating in the first to third operation modes, respectively. Table 1 shows the operation status of the main part in each operation mode.

  As shown in FIG. 4 and Table 1, in the first operation mode, the engine 2 is driven, and the power obtained by the engine 2 is distributed to the generator 4 and the heat pump compressor 6 by the planetary gear 3, and these distributions are performed. The generator 4 and the heat pump compressor 6 are driven by the generated power.

At this time, the load (electric resistance) of the generator 4 and the motor 5 is adjusted by the ECU 14 in accordance with the thermoelectric ratio x / y determined in step S18. A part of the power generated by the generator 4 is supplied to the motor 5 and the rest is supplied to the power distributor 8 via the power conversion mechanism 7, and a part of the power supplied to the power distributor 8 is a power request. is supplied to the domestic power line L2 in response to E _in, the remaining power is supplied to the commercial power line L1.

  As shown in FIG. 5 and Table 1, in the second operation mode, the engine 2 is driven, the power obtained by the engine 2 is transmitted to the generator 4 by the planetary gear 3, and the generator 4 is driven by this power. .

At this time, the load of the motor 5 or the heat pump compressor 6 is increased by the ECU 14 so that the motor 5 and the heat pump compressor 6 do not rotate, whereby the heat pump compressor 6 is stopped and the engine 2 All the obtained power is distributed to the generator 4. The electric power generated by the generator 4 is supplied to the power divider 8 via a power conversion mechanism 7, a part of the power is supplied to the domestic power line L2 in response to the power request E _in, the remaining Electric power is supplied to the commercial power line L1.

  As shown in FIG. 6 and Table 1, in the third operation mode, the engine 2 is stopped, the motor 5 is driven by commercial power, and the heat pump compressor 6 is driven.

  At this time, the generator 4 is configured so that the load is adjusted by the ECU 14 and the engine 4 is idling, so that the engine 2 is not rotated.

  And a series of operation | movement of 1 A of stationary type cogeneration systems is complete | finished.

  Returning to FIG. 3, if it is determined in step S10 that the stationary combined heat and power system 1A does not operate normally, that is, if there is an abnormality or failure in the stationary combined heat and power supply system 1A, the ECU 14 performs the countermeasure. (Step S26). The response is executed by displaying the contents of the abnormality or failure on the monitor.

  Next, the ECU 14 determines whether or not there is a stop input of the stationary cogeneration system 1A from the user (step S28).

  When it is determined in step S28 that there is a stop input from the user, the ECU 14 transmits a signal to each element, and stops the stationary heat and power supply system 1A (step S30). Similarly, if it is determined in step S22 that the operation mode does not correspond to any of the first to third operation modes, that is, if the operation mode corresponds to the fourth operation mode, the ECU 14 performs step S30. Execute. And a series of operation | movement of 1 A of stationary type cogeneration systems is complete | finished.

  If it is determined in step S28 that there is no stop input from the user, the series of operations of the stationary combined heat and power system 1A ends.

  Thus, in the stationary combined heat and power supply system 1A, power is obtained by operating the engine 2, and this power is distributed to the generator 4 and the heat pump compressor 6 by the planetary gear 3, and the distributed power is used. The generator 4 and the heat pump compressor 6 are driven. When the power obtained by the engine 2 is distributed to the generator 4 and the heat pump compressor 6 by the planetary gear 3, the ECU 14 adjusts the load of the generator 4 and the load of the heat pump compressor 6, thereby generating the generator. 4 and the power distributed to the heat pump compressor 6 can be continuously changed, so that the amount of power obtained by the generator 4, the heat pump compressor 6, the condenser 9, The amount of heat obtained by the heat pump including the expansion valve 11 and the evaporator 12 can be continuously changed. Therefore, by continuously changing the thermoelectric ratio, which is the ratio of the amount of power obtained by the generator 4 and the amount of heat obtained by the heat pump, it is possible to appropriately supply power and heat according to demand.

  In the stationary cogeneration system 1A, the power distribution means includes the planetary gear 3 that distributes the power obtained by the engine 2 to the generator 4 and the heat pump compressor 6, the load of the generator 4, and the heat pump compressor 6. Therefore, the power distribution means can have a simple configuration.

  Moreover, since the stationary cogeneration system 1A includes the motor 5 that drives the heat pump compressor 6 using commercial power, the engine 2 is operated to drive the heat pump compressor 6 to obtain heat. However, when it is cheaper to drive the heat pump compressor 6 using commercial power and obtain heat, the engine 2 is stopped and the heat pump compressor 6 is driven using commercial power. Therefore, the operation cost can be reduced.

  Further, the stationary combined heat and power system 1A adjusts the load of the motor 5 or the load of the heat pump compressor 6 to stop the driving of the heat pump compressor 6, and all the power obtained by the engine 2 is supplied to the generator 4. Since the ECU 14 for distribution is provided, there is no necessary heat amount y and there is only a necessary power generation amount x, or when the necessary heat amount y can be supplied only by recovering exhaust heat from the engine 2 by the hot water supply device 10, etc. All of the obtained power can be used for power generation by the generator 4, and power generation can be performed efficiently.

Further, stationary cogeneration system 1A includes a user cost calculating unit 15 for calculating a private power generation cost A _in reads the external environmental conditions, necessary heat quantity y, driving determination heat y _E, heat pump drive determining heat y _H, commercial power Since the ECU 14 sets the operation mode of the stationary cogeneration system 1A based on the cost A _out and the private power generation cost A _in , the cost borne by the user according to the external environment, user needs and overall efficiency is reduced. It is possible to calculate and set the operation mode appropriately.

  Next, a stationary combined heat and power system according to a second embodiment of the present invention will be described.

  FIG. 7 is a block diagram showing a stationary cogeneration system according to the second embodiment of the present invention.

  The stationary combined heat and power system 1B differs from the stationary combined heat and power system 1A according to the first embodiment shown in FIG. 1 in that the motor 5 is not provided and the clutch mechanism 16 is provided between the engine 2 and the planetary gear 3. It is a point equipped with.

  The clutch mechanism 16 is for connecting and disconnecting the engine 2 and the planetary gear 3. When the clutch mechanism 16 is connected, power obtained by the engine 2 is transmitted to the planetary gear 3, and when the clutch mechanism 16 is disconnected, power transmission between the engine 2 and the planetary gear 3 is interrupted. The connection and disconnection of the clutch mechanism 16 are controlled by the ECU 14.

  Here, in the stationary cogeneration system 1 </ b> B, the generator 4 is driven as a motor when commercial power is supplied from the power conversion mechanism 7. Then, the generator 4 is driven as a motor by commercial power, and the clutch mechanism 16 is disconnected, so that the power generated by the drive of the generator 4 is transmitted only to the heat pump compressor 6 and the heat pump compressor 6 is driven. It is possible to do. Thus, the generator 4 and the clutch mechanism 16 function as compressor driving means for driving the heat pump compressor 6 using commercial power.

  Such a stationary combined heat and power system 1B operates according to the flowchart of FIG. 3 in the same manner as the stationary combined heat and power system 1A according to the first embodiment.

  Here, the case where the stationary cogeneration system 1B executes the operation process according to the operation mode of step S24 will be described.

FIGS. 8-10 is a schematic block diagram which shows the operation | movement of the principal part when the stationary type cogeneration system shown in FIG. 7 is drive | operating by the 1st-3rd operation mode, respectively. Table 2 shows the operation status of the main part in each operation mode.

  As shown in FIG. 8 and Table 2, in the first operation mode, the engine 2 is driven, and the power obtained by the engine 2 is transmitted to the planetary gear 3 via the coupled clutch mechanism 16. This power is distributed to the generator 4 and the heat pump compressor 6 by the planetary gear 3, and the generator 4 and the heat pump compressor 6 are driven by the distributed power.

At this time, the load of the generator 4 and the load of the heat pump compressor 6 are adjusted by the ECU 14 in accordance with the thermoelectric ratio x / y determined in step S18. The electric power generated by the generator 4 is supplied to the power divider 8 via a power conversion mechanism 7, a part of the power is supplied to the domestic power line L2 in response to the power request E _in, the remaining Electric power is supplied to the commercial power line L1.

  As shown in FIG. 9 and Table 2, in the second operation mode, the engine 2 is driven, and the power obtained by the engine 2 is transmitted to the planetary gear 3 via the coupled clutch mechanism 16. This power is transmitted to the generator 4 by the planetary gear 3, and the generator 4 is driven by this power.

At this time, the load of the heat pump compressor 6 is increased by the ECU 14 so that the heat pump compressor 6 does not rotate, whereby the heat pump compressor 6 is stopped and all the power obtained by the engine 2 is generated by the generator 4. Distributed to. The electric power generated by the generator 4 is supplied to the power divider 8 via a power conversion mechanism 7, a part of the power is supplied to the domestic power line L2 in response to the power request E _in, the remaining Electric power is supplied to the commercial power line L1.

  As shown in FIG. 10 and Table 2, in the third operation mode, the engine 2 is stopped, and the generator 4 is driven as a motor by commercial power. The power by this drive is transmitted to the heat pump compressor 6 by the planetary gear 3, and the heat pump compressor 6 is driven by this power.

  At this time, the clutch mechanism 16 is disconnected, thereby preventing the engine 2 from rotating.

  It goes without saying that such a stationary cogeneration system 1B has the same effects as the stationary cogeneration system 1A according to the first embodiment.

  The present invention is not limited to the above embodiment. For example, in the above-described embodiment, the planetary gear 3 is used as the power distribution mechanism, but instead, a mechanism for distributing the power obtained by the engine 2 to two axes is provided, and the two axes are respectively CVT (Continuously). The power distribution mechanism may be connected to a variable transmission), and the two CVTs may be controlled by the ECU 14 as power distribution means.

  Moreover, in the said embodiment, although the condenser 9 is connected to the hot-water supply apparatus 10, and the evaporator 12 is connected to the cooling device 13, it replaces with this and the condenser 9 is connected to a heating apparatus, and the evaporator 12 is connected. May be connected to the outdoor unit of the heating device.

Moreover, in the said embodiment, the solar heat absorption means which absorbs the heat | fever of sunlight is provided, it connects to the hot water supply apparatus 10, and the water stored by the hot water supply apparatus 10 can be heated with the heat absorbed by this solar heat absorption means. Anyway. In this way, it becomes possible to reduce the fuel combustion in the engine 2, it is possible to reduce the emissions of CO _2.

Moreover, in the said embodiment, a solar power generation device, an electrical storage apparatus, etc. may be provided and connected to the power conversion mechanism 7, and the electric power supplied from this solar power generation device, an electrical storage apparatus, etc. may be utilized as external power. In this way, it becomes possible to reduce the fuel combustion in the engine 2, it is possible to reduce the emissions of CO _2, the power obtained by the solar generator can be sold to the power company. Moreover, the electric power obtained with the generator 4 or the solar power generation device can be stored in the power storage device.

  DESCRIPTION OF SYMBOLS 1A, 1B ... Stationary combined heat and power supply system, 2 ... Engine, 3 ... Planetary gear, 4 ... Generator, 5 ... Motor, 6 ... Heat pump compressor, 14 ... ECU, 16 ... Clutch mechanism.

Claims (5)

Engine,
A generator driven by the power obtained by the engine;
A heat pump compressor driven by the power obtained by the engine;
The power obtained by the engine is distributed to the generator and the heat pump compressor, and the power distributed to the generator and the power distributed to the heat pump compressor can be continuously changed. Power distribution means,
Stationary combined heat and power system. The power distribution means includes
A power distribution mechanism that distributes power obtained by the engine to the generator and the compressor for the heat pump;
Adjusting means for adjusting the load of the generator and the load of the compressor for the heat pump,
The stationary combined heat and power system according to claim 1. Compressor driving means for driving the compressor for heat pump using external power,
The stationary cogeneration system according to claim 1 or 2. Compressor stopping means for stopping driving of the heat pump compressor and distributing all the power obtained by the engine to the generator;
The stationary combined heat and power system according to any one of claims 1 to 3. Compressor driving means for driving the heat pump compressor using external power;
Compressor stopping means for stopping driving of the compressor for the heat pump and distributing all the power obtained by the engine to the generator;
An operation mode setting means for setting the operation mode based on the necessary heat amount and the private power generation cost,
The operation mode setting means stops driving of the heat pump compressor by at least a first operation mode in which power obtained by the engine is distributed to the generator and the heat pump compressor, and the compressor stop means. A second operation mode in which all the power obtained by the engine is distributed to the generator, and a third operation mode in which only the heat pump compressor is driven by using external power by a compressor driving means. Is possible,
The stationary cogeneration system according to claim 1 or 2.

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