JPH01230962A - Operation device in heat and electricity supplying plant - Google Patents

Abstract

PURPOSE:To make it possible to provide an economical operation for air conditioners by providing a sequence circuit for starting and stopping the air conditioners which starts progressively the air conditioners by selecting one by one from them by its lower operation cost during the load to the air conditioners is increasing and stops progressively the air conditioners by selecting one by one from them by its higher operation cost during the air conditioning load is decreasing. CONSTITUTION:When, in the flow of cold water in room cooling cycle, the temperature of the cold water in a cold-water go header 16 is taken as TL and the temperature of the cold water in the cold-water return header 18 as TH and the total amount of circulating cold water as WCT t/H, the load of room cooling, QCMCal/H is given by an equation: QC=WCT (TH-TL). The total amount of circulating cold water, WCT, is determined by the capabilities of cold water pumps which are attached respectively to room cooling machines 12a, 12b and 12c in operation. If the temperature TL of the cold water in the header 16 is over 7 deg.C, a new room cooling machine in the order of inexpensive operation cost is added for operation and a room cooling machine of a low operation cost carries an allowable maximum load. On the other hand, if the room cooling loads 17a, 17b, 17c in the header 16 decrease and the temperature of the cold water is lower than 7 deg.C, a room machine of a high operation cost is first stopped and progressively a machine of next higher operation cost is stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an operating device for a combined heat and power generation plant (hereinafter referred to as a cogeneration plant).

[Conventional technology]

The Konoene plant is a plant that mainly supplies electricity, hot and cold water for air conditioning, and hot water. FIG. 3 is a diagram showing an example of a cogeneration plant.

In FIG. 3, a diesel engine or gas engine 1 drives a generator 2 to supply electric power.

The heat i given to the cooling water 3 of the engine 1 is heat-exchanged by the jacket heat exchanger 4 and is transferred to the low-temperature circulating water 5 by -1. Further, the amount of heat in the exhaust gas 6 of the engine 1 is heat-exchanged in an exhaust gas heat exchanger 7 and is provided to the low-temperature circulating water 5. The coolant 3 of the engine 1 and the low-temperature circulating water 5 given the heat recovered from the exhaust gas 6 have a temperature increase and are stored in the high-temperature water tank 8 .

High-temperature circulating water 9 is supplied to hot water supply equipment 1 by high-temperature water supply pump 10.
The water is applied to the cooling equipment 12 and the heating equipment 13, and returns to the low-temperature water tank 14 after its temperature drops. The low-temperature circulating water 5 is sent from the low-temperature water tank 14 to the jacket heat exchanger 4 via a low-temperature water supply bomb fJ5.

The air conditioning equipment shown in Figure 3 uses high-temperature circulating water 9 that has been given the heat recovered from the engine as a heat source, but the air conditioning equipment that can be used with cogeneration grants is of the following types depending on what is used as the heat source or power source. is possible.

(1) An absorption refrigerator that produces cold water using hot water or steam as a heat source.

An electric target refrigerator that uses (2) as a power source to produce cold water.

(3) An oil (gas) prohibited heating machine that uses fuel oil or gas as a heat source to produce cold or hot water.

(4) A heating heat exchanger that produces hot water by exchanging heat with hot water or steam.

(5) Hot water produced using fuel oil or fuel gas as a heat source? Ira.

Incidentally, the operating costs of the above-mentioned air conditioning equipment used in a cogeneration plant vary depending on the model. Furthermore, the size of the heating and cooling load varies considerably depending on the season. For example, in Japan, the following can generally be said:

(1) Air conditioning is required in May, June, and October, but the load is not large.

(2) Air conditioning is required in July, August, and September, and the cooling load at this time is large.

(3) During the height of summer, a very large cooling load may be required for several days.

(4) Heating is required from November to March.

As mentioned above, despite differences in the operating costs of air conditioning equipment and monthly fluctuations in heating and cooling loads, conventionally the capacity of air conditioning equipment was selected by combining appropriate models based on the assumption of the maximum heating and cooling load. The air conditioners are installed so as to meet the maximum load, and the air conditioners are operated by appropriately dividing the load between them to meet the heating and cooling load at that time.

[Problem to be solved by the invention]

The operating costs of air conditioning equipment operated in cogeneration plants vary greatly depending on the model. Therefore, the conventional operating method in which the air conditioning equipment of the KonoEne plant is simply divided into appropriate loads to meet the heating and cooling load does not necessarily result in economical operation that reduces operating costs.

An object of the present invention is to provide an operating device for a cogeneration plan K that can solve the above-mentioned conventional problems.

[Means to solve the problem]

The operating device for a cogeneration plant according to the present invention recovers waste heat from an engine that drives a generator, and includes a plurality of air conditioners with different operating costs, including an air conditioner that uses the recovered heat as a heat source. In a cogeneration plant configured to operate the plurality of air conditioners appropriately according to the load, when the air conditioning load increases, the air conditioner with the lowest operating cost among the plurality of air conditioners is started sequentially, and the air conditioning It is characterized by being equipped with an air conditioner start/stop sequence circuit that sequentially shuts down air conditioners, starting with the one with the highest operating costs, when the load decreases.

[For production]

First, we will compare the operating costs of each air conditioner for the cooling load in a cogeneration plant.

(1) Absorption refrigerator that uses hot water or steam as a heat source.

Since hot water or steam produced by recovering engine cooling water and exhaust gas heat through a jacket heat exchanger and an exhaust gas heat exchanger is used as a heat source, the operating cost as an air conditioner can be considered to be O.

(2) A refrigerator is an electric motor powered by electricity.

The electric motor that uses the electricity generated by the cogeneration grant to generate chilled water estimates the operating costs of the chiller. The following assumptions are made for the estimation calculation.

(,) The power generation equipment is a diesel engine (hereinafter abbreviated as D7) generator.

(b) The fuel oil price is 40 yen/l.

(e) The fuel consumption rate of the DA generator is 0.28117'kw
Let it be h.

(d) The amount of lubricating oil in D/ is converted into the cost per unit of power generation and included in the unit of power generation. Here, the amount of lubricant is 0.
It is assumed to be 3 yen/kwh.

(・) Periodic maintenance costs for i are also converted into costs per unit power output and included in the unit power generation price. Here, the maintenance cost is 2.34 yen/
Let it be kwh.

(f) The coefficient of performance (the ratio of the amount of heat removed from the chilled water of the refrigerator to the heat input tK) of the electric target refrigerator is 4.0.

Based on the above assumptions, calculate the operating cost per cooling load I Mcat (the amount of heat removed by the chilled water and chiller).

do.

Calculate the power generation cost determined from the fuel consumption rate of the trench DA generator. Based on assumptions (b) and (e), the generation ηt cost determined from the fuel consumption rate -0,28117'kwh x 40
Yen A - 11.24 yen/kwh0 Assumption (d), (11) The power generation cost of the D/1 generator, including the amount of lubricating oil and maintenance cost, is as follows.

Meiji generator power generation cost -11,24+ 0.3 +
2.34-13.88 yen Awh.

On the other hand, when a heat input of 1 kWh is given to the TrL dynamic target refrigerator as the drive energy of the electric motor, the amount of heat that can be removed from the cold water is as follows based on assumption (f).

Amount of heat carried away by cold water -1kwhX4-0.86X4-
3.44 Meal/1 kwh human energy.

Therefore, the operating cost required to remove IMcal of heat from the cold water is given by the following equation.

Operating cost of electric tarp refrigerator - 13,88 yen/'kvrb/3.44 Mca7/1<
wh = 4.03 yen/MCd.

(Consideration D: If commercial electricity is used to drive the electric centrifugal chiller, the operating cost will be 21.90 yen/k in the summer.
The wh is as follows.

21.90 yen/kwh/3.44 Meat/kwh 6
．． 37 yen/McLt) (3) Oil-fired air conditioner/heater that uses fuel oil as its heat source.

Estimate the operating cost of an oil-fired air conditioner/heater that uses fuel oil as a heat source to produce cold water. At this time, we make the following assumptions.

(&) The fuel oil price is assumed to be 40 yen/l.

(b) The calorific value of fuel oil is 10.2 M cLt/kg
shall be. .

(c) The specific weight of fuel oil is 0.84 kg/l.

(d) The coefficient of performance of an oil-fired air conditioner/heater (when cooling) is 1.0.
5.

Based on the above assumptions, calculate the operating cost for each cooling load IMeat. First, assume that 11 fuel oils are poured into an oil-fired air conditioner. The amount of heat input to the air conditioner at this time is assumed (b),
(e) The result is 9th order.

10.2 Meat/klilX 0.84 to 9/l
-8,568Mcd/1 At this time, the amount of heat removed from the cold water by the oil-fired air conditioner/heater is based on assumption (d): 8.568 x 1.05 = 8.996M cal
/1 Therefore, the operating cost required to remove the heat of I Meat from the cold water is given by the following equation.

Operating cost of oil-fired air conditioner/heater = 40 yen/l/8.996 Mcal/l-4,45 yen/
The operating costs of cooling equipment are arranged in descending order of operating costs from Mcaj as follows.

On the other hand, although cooling is generally required during the period from May to October, FIG. 4 shows an example of changes and main turns in cooling load for each month. The characteristics of the cooling load can be summarized as follows.

(1) Cooling load in May, June, and October (part ■ in Figure 4)
is not very large.

(2) The cooling load from July to September (part ■ in Figure 4) is large (3) During the height of summer, the cooling load is very large for several days in a row (
Part ◎ in Figure 4) may be required.

Based on the above-mentioned differences in operating costs for each type of cooling equipment and characteristics of cooling loads, by adopting the following capacity selection and operating method for cooling equipment, operating costs for cooling equipment in cogeneration plants can be reduced compared to conventional methods. It is thought that the size can be made smaller.

(1) The capacity of the absorption chiller is preferably as large as possible since the operating cost is 0, but in reality, since the high temperature circulating water 9 is used as the heat source, the jacket heat exchanger 4 and the exhaust gas heat exchanger 7
It is determined by the amount of heat that can be recovered.

The amount of recovered heat is determined by the maximum amount of power supplied by the generator. Furthermore, if a portion of this recovered heat is used in the hot water supply equipment 11, the capacity of the absorption refrigerator will be reduced by that amount. Generally, the capacity of an absorption refrigerator, which is subject to such restrictions, cannot alone bear the cooling load (■+■ portion in FIG. 4) shown in FIG. 4 during the height of summer.

If the capacity of the absorption chiller is larger than the cooling load required in May, June, and October (the part shown in Figure 4),
It operates constantly during the cooling period, at partial load in March and October, and at maximum load from July to September. When the capacity of the absorption refrigerating machine is smaller than the cooling load shown in the section ■ in Figure 4, the absorption refrigerating machine is constantly operated at the maximum load during the cooling period.

(2) Electric motor? The capacity of the refrigerator should be determined to be large enough to share with the absorption refrigerator the large cooling load (part ■ in Figure 4) that is further required from July to September, and it should be used constantly during the high summer period from July to September. do. Note that the use of an electric centrifugal chiller not only increases the amount of power generated by the v, lz generator, but also has the secondary effect of increasing the amount of heat available to the absorption chiller.

(3) The capacity of the oil-fired air conditioner/heater is determined to be slightly larger than the peak cooling load that lasts for several days during midsummer (section ◎ in Figure 4). And oil-fired air conditioners are absorption refrigerators and electric motors? It handles peak cooling loads by sharing the cooling load with the refrigerator. In addition, oil-fired air conditioners will be introduced to also serve as heating loads.

Based on the above, it is conceivable to operate cooling equipment that shares the load according to the size of the cooling load during the cooling period as follows.

FIG. 5 shows the flow of cold water in the cooling cycle.

As cooling equipment, absorption refrigerator 12a, electric motor? Freezer 1
2b, low-temperature cold water sent out from the oil-fired air conditioner 12e (
(usually set at 7°C) enters the cold water header 16. The low-temperature cold water is distributed from the ladder 16 to a large number of cooling loads 17a, 17b+17c. The cold water that has passed through many cooling loads increases in temperature and enters the cold water return header 18.

The cold water is supplied from the cold water return header 18 to the cooling equipment 12a.

Return to 12b and 12c.

Let the cold water temperature in the cold water outgoing header 16 be TL, and the cold water temperature in the cold water return header 18 be TH. The total amount of cold water circulated
Assuming that cTt,A, the cooling load QcMeatA is given by the following equation.

Qe = W(7(TH-TL)) The total circulating amount of chilled water Wc↑ is determined by the capacity of the chilled water pump attached to the cooling equipment in operation.Normally, the cooling capacity of the cooling equipment is determined by the amount of chilled water determined by the chilled water dump capacity. It is expressed as the ability to lower the temperature by 5 degrees Celsius (normally the inlet chilled water temperature is 12 degrees Celsius and the outlet chilled water temperature is 7 degrees Celsius). Therefore, when a certain cooling equipment is operated, the temperature of the chilled water at the cooling load side increases by 5 degrees Celsius or more. If the chilled water temperature at the outlet of the cooling equipment is 7°C or higher, the cooling load is considered to exceed the cooling capacity of the cooling equipment. When the cooling load is controlled to the set value, it is considered that the cooling load is within the cooling capacity of the cooling equipment.

From this, when the chilled water temperature TL in the chilled water header 16 becomes 7° C. or higher, new cooling equipment is additionally operated in order of lowest operating cost. The increase in cooling load will be handled by newly added cooling equipment, and cooling equipment with low operating costs will share the maximum allowable load.

On the other hand, when the cooling load decreases and the chilled water temperature TL in the chilled water temperature TL in the chilled water header 16 is controlled to the set value of 7°C, and the chilled water temperature TL becomes 7°C or less, the operation starts. The operation of cooling equipment, which is expensive, will be stopped in sequence.

By adopting such an operating procedure, it is possible to always operate at low operating costs even when the cooling load fluctuates.

Next, we will compare the operating costs of each heating device against the heating load.

(1) The hot water type is a heating heat exchanger that uses steam as a heat source and produces hot water through heat exchange.

D. Since hot water or steam produced by recovering the heat of the cooling water and exhaust gas of AE is used as a heat source, the operating cost as a heating device is O.

(2) Oil-fired air conditioner/heater that uses fuel oil as its heat source.

Using the following assumptions, estimate the operating costs of an oil-fired air conditioner that produces hot water.

(,) The fuel oil price is assumed to be 40 yen/l.

(b) The calorific value of fuel oil is 10.2 McatAg.

(c) The specific weight of fuel oil is 0.84 kg/l.

(d) The coefficient of performance of an oil-fired air conditioner (during heating) is 1.0.
Set to 0.

Calculate the operating costs for the heating load IMcLt. Assumed (
b) , (c) It becomes as follows.

10.2 Meat/9 x 0.84X? /J =
8.568 Mcd/1 The amount of heat given to hot water by an oil-fired air conditioner/heater is 8.568 x 1.0 = 8 based on assumption (d)
．． 568 Mcml/1 Therefore, 1 Mcml in hot water
The operating cost required to provide the amount of heat is given by the following equation:

Operating cost of oil-fired air conditioner/heater - 40 yen/l/8.568 Mcd/l! = 4.673 yen/Meal (3) A hot water boiler that uses fuel oil as a heat source to produce hot water.

The following assumptions are made to estimate the operating costs of hot water digi.

(Breathe) The fuel oil price will be 40 yen/liter.

(b) The calorific value of fuel oil is 10.2 Mcajlkg.

(c) The fuel oil ratio Jifk is set to 0.84 to 9/l.

(d) Boiler effectiveness * is 0.9.

Based on the above assumption, the amount of heat given to hot water when the hot water boiler pours 11 fuel oils is as follows.

10.2 McatAX 0.84 kg/l
, 9= 7.711 Mcal/1 Therefore, the operating cost required to provide IMeLt of heat to hot water is determined by the following equation.

Hot water? Ira's operating expenses = 40 yen 11/7.711 Mcat/l = 5.
Low operating costs for heating equipment from 19 yen/MeLt or more1
Arranged in order, it looks like this:

Next, the following rules apply regarding the capacity of the above-mentioned heating equipment.

(1) The capacity of the heating heat exchanger is preferably larger since the operating cost is O, but in reality it is determined by the amount of heat recovered as high-temperature circulating water in the jacket heat exchanger and exhaust gas heat exchanger. The amount of recovered heat is determined by the maximum amount of power that can be supplied by D or the generator. In the winter when heating operation is required, a portion of the recovered heat is often used to heat hot water, so the heating heat exchanger alone cannot share the entire heating load.

(2) As mentioned above, oil-fired air conditioners are usually installed to handle peak cooling loads, so the capacity of oil-fired air conditioners is determined to satisfy the heating load that is insufficient in the heating heat exchanger. It doesn't mean you can't do it.

Therefore, if the heating load is satisfied by the heating heat exchanger and the oil-fired air conditioner/heater, there is no problem, but if there is a shortage, the hot water gailer will supply the insufficient heating water.

Figure 6 shows the flow of hot water in the heating cycle. As a heating device, high-temperature hot water (normally 55°C
) enters the hot water outgoing header 19. High-temperature hot water is supplied to a larger number of heating loads 20a than the hot water header 19.
, 20b, 20c. The hot water that has passed through a large number of heating loads decreases in temperature and enters the hot water return header 21. Hot water is supplied from heating equipment 15hg15b+ from hot water return header 2.
Come back to 5c.

The hot water temperature in the hot water outgoing header 19 is assumed to be TH, and the hot water temperature in the hot water return header 21 is assumed to be TL. The total circulation amount of hot water is W
Assuming HTtA, the heating load QHMcaJy'H is given by the following equation.

QH=WH↑(Tll-TL) The total circulating amount of hot water, wH, is determined by the capacity of the hot water pump attached to the heating device in operation. Usually, the heating capacity of a heating device is expressed as the ability to raise the amount of hot water determined by the capacity of the hot water pump by 5°C (normally, the inlet hot water temperature is 50°C and the outlet hot water temperature is 55°C). Therefore, if the temperature of the hot water drops by 5℃ or more on the heating load side while a certain heating device is in operation, and the hot water temperature at the outlet of the heating device becomes 55℃ or less, the heating load will be reduced by the heating capacity of that heating device. It is thought that it exceeds the The hot water temperature at the heating equipment outlet is 55
When the heating load is controlled to the set value of °C, the heating load is considered to be within the heating capacity of the heating equipment.

From this, when the hot water temperature TH in the hot water outgoing header 19 becomes 55° C. or lower, new heating devices are additionally operated in descending order of operating cost. In response to an increase in heating load,
The newly added heating equipment will be used to handle the load, and the heating equipment with lower operating costs will share the maximum allowable load.

On the other hand, when the heating load decreases while the hot water temperature TH in the hot water header 19 is controlled to the set value of 55°C, the heating equipment with higher operating costs responds, and the hot water temperature TH finally reaches 55°C. If the temperature exceeds that level, stop the operation of the heating equipment. By employing such a driver's control, it is possible to always operate at low operating costs even when the heating load fluctuates.

〔Example〕

FIG. 1 is a block diagram showing the configuration of an operating system when a hot water absorption refrigerator, an electric target refrigerator, and an oil-fired air conditioner/heater are used as cooling equipment for a cogeneration plant according to an embodiment of the present invention.

In FIG. 1, a driver gives a cooling operation start command to a cooling operation command device 110. The cooling operation command device 110 outputs a signal of 1 when a cooling operation start command is issued, and a signal of 0 otherwise.
Outputs the signal. The function generator 111 uses the cold water temperature in the cold water header 16 as an input signal to generate a function having the characteristics shown in FIG. The function generator 111 outputs a signal of 1 when the chilled water temperature in the chilled water header 16 is higher than the chilled water temperature setting value of 7 degrees Celsius by 9211 degrees Celsius or more, and otherwise outputs a signal of 0.

The output signal of the cooling operation command device 110 and the output signal of the function generator 111 are input to an AND circuit 112.

The circuit 112 outputs a signal obtained by ANDing a plurality of input signals. The output of the AND circuit 112 is input to a first self-holding circuit 113 with a forced reset function. When the output of the AND circuit 112 is 1, the first self-holding circuit 113
outputs a signal of 1, and when the output of the melon circuit 112 is O, the output of the first self-holding circuit 113 is held at the value at that time.

The output signal of the first self-holding circuit 113 is input to an absorption refrigerator start/stop sequence circuit 114. When the output signal of the first self-holding circuit 113 is 1, the absorption refrigerator is started, and when it is O, the absorption refrigerator is stopped.

The output signal of the first self-holding circuit 113 is the output signal of the first timer 1.
15 is input. The first timer 115 outputs the output signal of the first self-holding circuit 113 with a certain predetermined time delay. The output signal of the function generator 111 and the output signal of the first timer 115 are input to an AND circuit 116. The output signal of the AND circuit 116 is input to a second self-holding circuit 117 with a forced reset function. When the output of the AND circuit 116 is 1, the second self-holding circuit 117
outputs a signal of 1, and when the output of the AND circuit 116 is O, the output of the second self-holding circuit 117 is held at its current value.

The output signal of the second self-holding circuit 117 is input to the electric motor and refrigerator start/stop sequence circuit 118. Second
When the output of the self-holding circuit 117 is 1, the electric target refrigerator is started, and when it is 0, the electric target refrigerator is stopped.

The output signal of the second self-holding circuit 117 is
19 is input. The second timer 119 outputs the output signal of the second self-holding circuit 117 with a certain predetermined time delay. The output signal of the function generator 111 and the output signal of the second timer 119 are input to the melon circuit 120. A
The output signal of the ND circuit 120 is input to a third self-holding circuit 121 with a forced reset function. AND circuit 12
When the output of 0 is 1, the third self-holding circuit 121 is 1
When the output of the AND circuit 120 is O, the output of the third self-holding circuit 121 is held at its current value. The output signal of the third self-holding circuit 121 is input to the start/stop sequence circuit 122 of the oil-fired air conditioner/heater. When the output of the third self-holding circuit 121 is 1, the oil-fired air conditioner/heater is activated, and when the output is 0, the oil-fired air conditioner/heater is stopped.

The output signal of the third self-holding circuit 12 is the output signal of the third timer 1.
23. The third timer 123 outputs the output signal of the third self-holding circuit 121 with a certain predetermined time delay. The output signal of the first self-holding circuit 113 and the output signal of the second self-holding circuit 117 are input to the tuyere path 124.

The output signal of the tuyere passage 124 instructs selection of whether to perform maximum load operation as the operation mode of the absorption chiller. When the output of the tuyere passage 124 is 1, the absorption refrigerator operates at the maximum allowable load, and when the output is 0, it does not operate at the maximum load.

The output signal of the second self-holding circuit 117 is
5 is input. When the NOT circuit 125 receives an input signal of 1, it outputs an output signal of O, and when it receives an input signal of 0, it outputs an output signal of 1.
output signal.

Output signal of first self-holding circuit 113 and NOT circuit 12
The output signal of No. 5 is input to the AND circuit 126. AND
The output signal of the circuit 126 instructs selection of whether or not to perform load following operation as the operation mode of the absorption refrigerator. When the output of the AND circuit 126 is 1, the absorption chiller controls the temperature of cold water coming out of the absorption chiller to a predetermined temperature (usually 7°C) by adjusting the amount of hot water according to the cooling load. When the value is 0, load following operation is performed.When the value is 0, load following operation is not performed.

The output signal of the second self-holding circuit 117 and the output signal of the third self-holding circuit 121 are input to an AND circuit 127. The output signal of the AND circuit 127 instructs selection of whether or not the electric motor performs maximum load operation as the operating mode of the refrigerator. When the output of the tuyere passage 122 is 1, the electric motor operates the refrigerator at the maximum allowable load, and when the output is 0, the maximum load operation is not performed.

The output signal of the third self-holding circuit 121 is the NOT circuit 12
8 is input.

Output signal of second self-holding circuit 117 and NOT circuit 12
The output signal of 8 is input to an AND circuit 129. AND
The output signal of the circuit 129 instructs selection of whether or not to perform load following operation as the operation mode of the electric term refrigerator. A
When the output of the ND circuit 129 is 1, the electric centrifugal chiller changes the valve opening of the slide valve that adjusts the amount of refrigerant circulation according to the cooling load to keep the temperature of the chilled water coming out of the turbo chiller at a predetermined temperature of 7°C. Load following operation is performed to control the load so that the value becomes 0.
In this case, load following operation is not performed.

The function generator 130 uses the temperature of the cold water in the lug 16 as an input signal and generates a function having the characteristics shown in FIG.

The function generator 130 calculates that the temperature of the cold water in the cold water header 16 is ΔT! 1 when the temperature drops by more than ℃
outputs a signal of O, and otherwise outputs a signal of O. The output signal of the function generator 130 is input as a forced reset signal to the third self-holding circuit 12. When the forced reset signal is 1, the output of the third self-holding circuit 12 is an O signal, and when the forced reset signal is O,
The output of the third self-holding circuit 12 remains at its current value.

The output signal of the second timer 119 is input to the NOT circuit 131.

The output signal of the function generator 130 and the output signal of the NOT circuit 13 are input to a tuyere path 132. The output signal of the AND circuit 132 is input as a forced reset signal to the first self-holding circuit 113. The output of the first self-holding circuit 113 is a 0 signal when the forced reset signal is 1, and remains unchanged when the forced reset signal is O.

The output signal of the third timer 123 is input to the NOT circuit 133.

The output signal of the function generator 130 and the output signal of the NOT circuit 133 are input to an AND circuit 134. The output signal of the tuyere path 134 is input as a forced reset signal to the second self-holding circuit 117. The output of the second self-holding circuit 117 is an O signal when the forced reset signal is 1, and remains unchanged when the forced reset signal is O.

The signal flow has been explained above, and the operation will be described next.

When the driver issues a cooling operation start command to the cooling operation command device 110, the temperature of the chilled water in the chilled water flow header 16 becomes (7+Δ
T! )° C. or above, it is considered that there is a sufficient cooling load, so a signal of 1 is output from the AND circuit 112 and the absorption refrigerating machine is started by the absorption refrigerating machine start/stop sequence circuit 114. At this time, if the temperature of the chilled water in the chilled water header 16 is below (7+ΔTl)°C, the cooling load is considered to be small, so the O signal is output from the circuit 112 and the absorption chiller is not started. do not have.

When only the absorption refrigerator is operating, AND circuit 1
Since the output signal of 26 becomes 1, the absorption refrigerator enters the load following operation mode and the chilled water temperature is controlled to 7°C. At this time, the output of the function generator 111 becomes 0. However, when the cooling load increases, the absorption chiller also increases the amount of hot water it receives from high-temperature circulating water to keep up with the load in order to maintain the chilled water temperature at 7°C. The temperature of the cold water inside Rada 16 is finally (7+Δ'ri)℃
That's all. At this time, the output of the function generator 111 becomes 1.

On the other hand, when the output #'i of the first timer 115 and the output #'i of the first self-holding circuit 113 become 1 and a certain set time elapses, a signal of 1 is output. Therefore, the time from when the absorption refrigerator is started until the cooling load increases and the output of the function generator 111 becomes IK again is determined by the first timer 115.
If the above-mentioned set time is greater than the above-mentioned set time, when the output of the function generator 111 becomes 1, the output of the KAND circuit 116 becomes 1. Therefore, the output of the second self-holding circuit 117 is also 1
Start/stop sequence circuit 11 of Tona Shimi motor for refrigerator
At 1 Jt/C, the stain movement target refrigerator is started. The role of the first timer 115 is that when the output of the first self-holding circuit 113 becomes 1, if the first timer 115 does not exist, the absorption refrigerator is started and at the same time the electric motor starts the refrigerator. This is to prevent it from being activated. Therefore, the set time of the first timer 115 needs to be set to about the settling time for the chilled water temperature of the activated absorption refrigerator. When both the absorption refrigerator and the tarp refrigerator are started, the output of the AND circuit 124 becomes 1) The absorption refrigerator stops load following operation (the output of the AND circuit 126 becomes O
(K), the maximum allowable load operation is maintained.

This is to share as much of the cooling load as possible with the absorption chiller, which has the lowest operating cost.

On the other hand, since the oil-fired air conditioner is not in operation, AND circuit 1
The output of No. 29 is 1, the Shitarpo refrigerator is in the load following operation mode, and the chilled water temperature is controlled at 7°C. At this time, the output of the function generator 111 becomes 0.

However, if the cooling load increases further, the chilled water temperature will be reduced to 7°C.
The tarp refrigerator increases the amount of refrigerant circulation to keep up with the load, but if the cooling load shared by the turbo refrigerator increases beyond the maximum cooling capacity of the turbo refrigerator, the temperature of the chilled water in the chilled water flow header 16 will eventually drop. (7+ΔT1)℃ or higher. At this time, the output of the function generator 111 becomes 1.

On the other hand, the output signal of the 20th timer 119 outputs a signal of 1 when a certain set time elapses after the output of the second self-holding circuit 117 becomes 1. Therefore, after the tarp refrigerator is started, the cooling load increases and the function generator 1
The time until the output of 11 becomes IK again is the second timer 1.
If the above setting time of 19 is also larger, the function generator 11
When the output of the AND circuit 120 becomes 1, the output of the AND circuit 120 becomes 1. Therefore, the output of the third self-holding circuit 121 is also 1.Start-stop sequence circuit 1 of oil-fired air conditioner/heater
At 22, the oil-fired air conditioner/heater is started.

The role of the second timer 119 is to
When the output of 2 becomes IK, if the second timer 119
This is to avoid the possibility that the oil-fired air conditioner/heater would be started at the same time as the chiller was started if there was no such thing. Therefore, the set time of the second timer 119 needs to be set to approximately the time required for the activated engine to settle to the chilled water temperature of the refrigerator.

When both the refrigerator and the oil-fired air conditioner/heater are started, the output of the AND circuit 122 becomes 1, and the target refrigerator stops load following operation (the output of the AND circuit 129 becomes 0). Load operation is continued.This is because the chiller, which has the lowest operating cost next to the absorption chiller, shares as much of the cooling load as possible with the chiller.

The oil-fired air conditioner/heater is always in load following operation mode after startup, the chilled water temperature is controlled at 7℃, and the output of function generator 11 is O.
Totoru.

In this state, the absorption chiller and centrifugal chiller operate at maximum load, and the oil-fired air conditioner/heater operates at load following.

From this state, when the cooling load decreases and the temperature of the chilled water in the chilled water header 16 drops by 372 degrees centigrade or more from the set value of 7 degrees centigrade, the output of the function generator 130 becomes 1.

Since the output 1 of the function generator 130 is input as a forced reset signal to the third self-holding circuit 12, the output of the third self-holding circuit 121 becomes 0, and the output is set to 0 by the start/stop sequence circuit 122 of the oil-fired air conditioner/heater. υOil-fired air conditioners and heaters will be shut down.

When the output of the third self-holding circuit 12 becomes 0, the output of the AND circuit 127 becomes 0) The tarp refrigerator stops operating at the maximum allowable load, and the output signal of the AND circuit 129 becomes 1, so that the load is followed. When the operation starts, the temperature of the cold water in the cold water header 16 rises and the function generator 130 reaches the set temperature of 7°C.
The output signal of becomes O.

The third timer 123 outputs the output signal O of the third self-holding circuit 121 after a certain set time has elapsed.

The setting time of the third timer 123 is evening.-? If we take the settling time for the chilled water temperature of the refrigerator, when the chilled water temperature reaches 7°C and the output of the function generator 130 becomes O, the input signal of the NOT circuit 133 becomes 0 and the output signal of the NOT circuit 133. becomes 1. In this state, the output signal of the AND circuit w1134 is 0. The role of the third timer 123 is to
This is to avoid that when the output of the self-holding circuit 12 becomes O, if the third timer 123 is not provided, the oil-fired air conditioner and heater will be stopped and the refrigerating machine will also be stopped at the same time. .

However, the cooling load further decreased and the chilled water header 16
When the temperature of the cold water in the chamber drops by 7°C or more ΔTz°C, the output signal of the function generator 130 becomes 1.AND circuit 1
The output of 34 is 1. Since the forced reset signal of the second self-holding circuit 117 becomes 1, the second self-holding circuit 11
The output of No. 7 is 0, and the Shitade refrigerator is stopped by the Shitame refrigerator start/lock sequence circuit 118. At this time, the output of the AND circuit 124 becomes O, so the absorption refrigerator stops operating at the maximum allowable load, and the output of the AND circuit 126 becomes 1, so it shifts to load following operation. Due to the load following operation of the absorption refrigerator, the temperature of the chilled water in the chilled water header 16 rises to the set temperature of 7° C., and the output of the function generator 130 becomes O.

The second timer 119 outputs an output of 0 from the second self-holding circuit 117 after the set time has elapsed. If the setting time of the second timer 119 is set to about the settling time for the chilled water temperature of the absorption chiller, the input signal to the NOT circuit 13 will be around the time when the chilled water temperature reaches 7°C and the output of the function generator 130 becomes O. is OK
Therefore, the output of the NOT circuit 131 becomes 1. It was recommended that the setting time of the second timer 119 be set to about the settling time for the chilled water temperature of the tarp refrigerator when the tarp refrigerator is started. Of the settling time for the chilled water temperature of the refrigerator,
The larger value should be used.

In this state, the output of the palm circuit 132 is 0.

The role of the second timer 119 here is that when the output of the second self-holding circuit 117 becomes 0, if the second timer 119 is not present, the absorption refrigerating machine will stop at the same time. This is to prevent the aircraft from being stopped as well.

By the way, as the cooling load further decreases, the cold water supply header 16
When the temperature of the cold water inside the tank falls by more than 7° C. ΔTz'C, the output of the function generator 130 becomes 1, and the output of the ANi) circuit 132 becomes 1. Since the forced reset signal of the first self-holding circuit 13 becomes 1, the output of the first self-holding circuit 113 becomes 0, and the absorption chiller start/stop sequence circuit 11
4, the absorption refrigerator is stopped.

As mentioned above, when the cooling load increases, absorption chillers, thermal chillers, and oil-fired air conditioners are started in the order of lowest operating cost, and during operation, the cooling/heating equipment with the highest operating cost is activated. Cooling equipment that performs load-following operation and has low operating costs performs low-cost operation by operating at the maximum allowable load. Also, when the cooling load decreases,
Shutdown is performed in the order of highest operating cost: oil-fired air conditioners, then turbo chillers, then absorption chillers.

Next, an example for a heating load will be described.

FIG. 2 is a block diagram showing the configuration of an operating system when a heating heat exchanger, an oil-fired air conditioner, and a hot water boiler are used as heating equipment in a cogeneration grant according to another embodiment of the present invention. Same as Figure 1.

In FIG. 2, a driver gives a heating operation start command to a heating operation command device 210. The heating operation command device 210 outputs a signal of 1 when receiving a heating operation start command, and outputs a signal of 0 otherwise.

The function generator 211 uses the hot water temperature in the hot water header 19 as an input signal to generate a function having the characteristics shown in FIG. The function generator 211 outputs a signal of 1 when the hot water temperature in the hot water header 19 is lower than the hot water set temperature of the heating device by ΔT1°C or more, and outputs a signal of O otherwise. do.

The output signal of the heating operation command device 210 and the output signal of the function generator 211 are input to an AND circuit 212.

The output signal of the AND circuit 212 is input to a fourth self-holding circuit 213 with a forced reset function.

The output signal of the AND circuit 212 and the fourth self-holding circuit 21
The relationship between the output signals of No. 3 and 3 is the same as the relationship between the output signal of the AND circuit 112 and the output signal of the first self-holding circuit 113. The output signal of the fourth self-holding circuit 213 is input to a start/stop sequence circuit 214 of a hot water pump that supplies hot water for heating to a heat exchanger for heating. Fourth self-holding circuit 21
When the output signal □ of No. 3 is 1, the hot water pump is started, and when it is 0, it is stopped.

The output signal of the fourth self-holding circuit 213 is transmitted to the fourth timer 2.
15 is input. The function of the fourth timer 215 is the same as that of the first timer 115.

The output signal of the function generator 21 and the output signal of the fourth timer 2"15 are input to the tail circuit 216.

The output signal of the AND circuit 216 is transmitted to the fifth self-holding circuit 21
7 is input.

The output signal of the fifth self-holding circuit 217 is input to the start/stop sequence circuit 2.18 of the oil-fired air conditioner/heater. The output signal of the fifth self-holding circuit 217 is input to the fifth timer 219.

The output signal of the function generator 21 and the output signal of the fifth timer 219 are input to an AND circuit 220.

The output signal of the AND circuit 220 is sent to the sixth self-holding circuit 22.
1 is input.

The output signal of the sixth self-holding circuit 221 is input to a hot water boiler start/stop sequence circuit 222. The start/stop sequence circuit 222 starts and stops the hot water pump that supplies hot water for heating to the hot water timer, and ignites and extinguishes the burner of the hot water timer.

The output signal of the sixth self-holding circuit 221 is the output signal of the sixth timer 2.
23.

The output signal of the fourth self-holding circuit 213 and the output signal of the fifth self-holding circuit 217 are input to an AND circuit 224 . The output signal of the AND circuit 224 instructs selection of whether to perform maximum load operation as the operation mode of the heating heat exchanger. The load on the heating heat exchanger is adjusted by passing a portion of the heating hot water supplied by the hot water pump through the heating heat exchanger through a three-way valve. The maximum load operation of a heating heat exchanger is to pass all of the heating hot water through the heat exchanger.

The output signal of the fifth self-holding circuit 217 is the NOT circuit 22
5 is input.

Output signal of fourth self-holding circuit 213 and NOT circuit 22
The output signal of No. 5 is input to the AND circuit 226. AND
The output signal of the circuit 226 instructs selection of whether or not to perform load following operation as the operation mode of the heating heat exchanger. In the load following operation, the hot water temperature at the outlet of the heating heat exchanger is controlled to a predetermined value of 55° C. by adjusting the amount of hot water passing through the three-way valve according to the heating load.

The output signal of the fifth self-holding circuit 217 and the output signal of the sixth self-holding circuit 221 are input to an AND circuit 227. The output signal of the AND circuit 227 instructs selection of whether or not to perform maximum load operation as the operating mode of the oil-fired air conditioner/heater.

The output signal of the sixth self-holding circuit 22 is the NOT circuit 22.
8 is input.

The output signal of the fifth self-holding circuit 217 and the NOT circuit 22
The output signal of 8 is input to the AND circuit 224. AND
The output signal of the circuit 229 instructs selection of whether or not to perform load following operation as the operation mode of the oil-fired air conditioner/heater. In the load following operation, the combustion amount is adjusted according to the heating load, and the temperature of the hot water discharged from the oil-fired air conditioner/heater is controlled to a predetermined value of 55°C.

The function generator 230 uses the hot water temperature in the hot water header 19 as an input signal to generate a function having the characteristics shown in FIG. The function generator 230 sends hot water to the hot water.The temperature of the hot water in the ladder 19 is ΔT from the set temperature of 55°C! When the temperature rises by ℃ or more, a signal of 1 is output; otherwise, a signal of 0 is output.

The output signal of the function generator 230 is transmitted to the sixth self-holding circuit 22
It is input as a forced reset signal of 1.

Output signal of function generator 230 and sixth self-holding circuit 22
The relationship between the first output signal and the third self-holding circuit 121 is the same as the relationship between the output signal of the function generator 130 and the third self-holding circuit 121.

The output signal of the fifth timer 219 is input to the NOT circuit 23.

The output signal of the function generator 230 and the output signal of the NOT circuit 23 are input to an AND circuit 232. AND circuit 23
The output signal No. 2 is input as a forced reset signal to the fourth self-holding circuit 213. The relationship between the output signal of the AND circuit 232 and the output signal of the fourth self-holding circuit 213 is as described above.
Output signal of ND circuit 132 and first self-holding circuit 113
The relationship between the output signals is the same as that of .

The output signal of the sixth timer 223 is input to the NOT circuit 233.

The output signal of the function generator 230 and the output signal of the NOT circuit 233 are input to an AND circuit 234. AND circuit 23
The output signal No. 4 is inputted as a forced reset signal of the fifth self-holding circuit 217. The output signal of the AND circuit 234 is input as a forced reset signal to the fifth self-holding circuit 217. The relationship between the output signal of the AND circuit 234 and the output signal of the fifth self-holding circuit 217 is the same as that of the AND circuit 13.
This is the same as the relationship between the output signal of No. 4 and the output signal of the second self-holding circuit 117.

The signal flow has been explained above, and the operation will be described next.

When the driver gives a heating operation command to the heating operation command device 210, the hot water temperature in the hot water sending header 19 becomes (55-Δ'r
+)" If it is less than c, it is considered that there is a heating load, so a signal of 1 is output from the AND circuit 212, and the hot water pump is automatically started by the hot water pump start/stop sequence circuit 214 of the heating heat exchanger. If hot water header 1
If the hot water temperature in the hot water pump 9 is higher than (55-ΔT'1)0C, it is considered that the heating load is small, so the AND circuit 212 outputs an O signal and the hot water pump is not started.

When only the heating heat exchanger is operating, the output of the ANT) circuit 226 is 1, so the load following operation mode is entered and the hot water temperature is controlled at 55°C. At this time, the output of the function generator 211 becomes O. However, when the heating load increases, the amount of hot water passing through the heating heat exchanger increases to keep the hot water temperature at 55℃ to keep up with the load, but the heating load exceeds the maximum load of the heating heat exchanger. When increases, hot water header 1
The temperature of the hot water in 9 is below K(55-ΔTl)"c)
It becomes. The output of the function generator 211 at this time becomes 1.

On the other hand, the output of the fourth timer 215 outputs a signal of 1 if a certain set time elapses after the output of the fourth self-holding circuit 213 becomes 1. Therefore, after the heating heat exchanger is activated, the heating load increases and the function generator 21
The time until the output of 1 becomes IK again is determined by the fourth timer 2.
15), the output of the AND circuit 116 will be 1 to 4.

Therefore, the output of the fifth self-holding circuit 217 is also 1, and the oil-fired air conditioner/heater is activated by the oil-fired air conditioner/heater start/stop sequence circuit 218. The role of the fourth timer 215 is that when the output of the fourth self-holding circuit T#213 becomes 1, if the fourth timer 215 is not present, the heating heat exchanger will operate and at the same time the oil-fired air conditioner will also operate. This is to prevent it from being activated. Therefore, the fourth timer 215
It is necessary to set the setting time to about the settling time for the hot water temperature of the heating heat exchanger.

When both the heating heat exchanger and the oil-fired air conditioner are started, the output signal of the AND circuit 224 becomes 1, and the heating heat exchanger stops load following operation (the output of the AND circuit 226 becomes 0). (for this reason) the maximum allowable load operation will be maintained. This is to allow the heating heat exchanger, which has the lowest operating cost, to share as much of the heating load as possible.

On the other hand, since the hot water boiler is not operating, the output of the AND circuit 229 is 1, and the oil-fired air conditioner is in the load following operation mode, and the hot water temperature is controlled to 55°C. At this time, the output of the function generator 211 becomes O. However, when the heating load increases further, the oil-fired air conditioner increases the amount of combustion to keep up with the load in order to maintain the hot water temperature at 55℃, but the heating load shared by the oil-fired air conditioner exceeds the maximum heating capacity of the oil-fired air conditioner. As the temperature increases, the hot water temperature in the hot water outgoing header 19 finally reaches (55
−ΔTl)℃ or below. At this time, the function generator 211
The output of is 1.

On the other hand, the output signal of the fifth timer 219 outputs a signal of 1 after a certain set time elapses after the output signal of the fifth self-holding circuit 217 becomes 1.

Therefore, if the time from when the oil-fired air conditioner is started until the heating load increases and the output of the function generator 21 becomes l again is longer than the settling time of the fifth timer 219, then the function is generated. When the output of device 21 becomes 1', A
The output of the ND circuit 220 becomes 1. Therefore, the output of the sixth self-holding circuit 221 also becomes 1. Is there hot water in the start/stop sequence circuit 222? Ira's hot water pump is activated and the burner is ignited. Fifth timer 21
The role of 9 is to avoid that when the output of the fifth self-holding circuit 217 becomes 1, if the fifth timer 219 is not present, the hot water boiler will also be started at the same time as the oil-fired air conditioner is started. It's for a reason. Therefore, the set time of the fifth timer 219 needs to be set to about the settling time for the hot water temperature of the oil-fired air conditioner.

When the oil-fired air conditioner and hot water are both started, AN
The output of the D circuit 227 becomes 1, and the oil-fired air conditioner/heater stops the load following operation (because the output of the AND circuit 229 becomes O) and continues operating with the maximum allowable load. This is to share as much of the heating load as possible with the oil-fired air conditioner, which has the lowest operating cost next to the heating heat exchanger.

After the hot water generator is started, it is always in the load following operation mode, the hot water temperature is controlled to 55° C., and the output of the function generator 211 is O.

In this state, the heating heat exchanger and oil-fired air conditioner/heater are operating at maximum load, and the hot water boiler is operating at load following.

From this state, when the heating load decreases and the hot water temperature in the hot water sending header 19 rises from the set value of 55° C. to 9712° C. or more, the output of the function generator 230 becomes 1. Function generator 23
Since the output 1 of 0 is input as a forced reset signal to the sixth self-holding circuit 221, the output signal of the sixth self-holding circuit 221 is not 0, and is input to the start/stop sequence circuit 222 of the hot water deiner. Hot water? Ira is suspended.

When the output of the sixth self-holding circuit 221 becomes 0, the output of the AND circuit 227 becomes O. The oil-fired air conditioner stops operating at the maximum allowable load, and the output of the AND circuit 229 becomes 1, so it starts load following operation. The temperature of the hot water in the hot water header 19 drops to the set temperature of 55°C.The function generator 230
The output signal of becomes O.

The sixth timer 223 outputs the output signal 0 of the sixth self-holding circuit 22 after a certain set time has elapsed. If the setting time of the sixth timer 223 is about the settling time for the hot water temperature of the oil-fired air conditioner/heater, then when the hot water temperature reaches 55°C and the output of the function generator 230 becomes O, the K NOT circuit 23
The input signal of 3 becomes 0, and the output signal of NOT circuit 133 becomes 1.

In this state, the output of the melon circuit 234 is 0.

The role of the sixth timer 223 is that the sixth self-holding circuit 22
If the output of the sixth timer 223 becomes O,
This is to prevent the oil-fired air conditioner/heater from being stopped at the same time as the hot water boiler is stopped if there is no.

Furthermore, when the heating load decreases and the hot water temperature in the ladder 19 rises from 55°C by ΔTa'C or more, the output of the function generator 230 becomes 1, and the output of the AND circuit 234 becomes 1.
becomes. Since the forced reset signal of the fifth self-holding circuit 217 becomes 1, the output of the fifth self-holding circuit 217 becomes O
The oil-fired air conditioner/heater is stopped by the start/stop sequence circuit 218 for the oil-fired air conditioner/heater.

At this time, the output signal of the AND circuit 224 becomes O, so the heating heat exchanger stops operating at the maximum allowable load, and the output of the AND circuit 226 becomes 1, so it shifts to load following operation. Due to the load following operation of the heating heat exchanger, the temperature of the hot water in the hot water header J9 decreases to the set temperature of 55° C. and the output of the multiple function generator 230 becomes O.

The fifth timer 219 outputs the output O of the fifth self-holding circuit 217 after the set time has elapsed. Fifth timer 219
If the setting time is about the same as the settling time for the hot water temperature of the heating heat exchanger, the hot water temperature will reach 55°C and the function generator 2
When the output of the NOT circuit 23 becomes O, the input signal of the NOT circuit 23 becomes O, and the output of the NOT circuit 231 becomes 1.

When starting the oil-fired air conditioner/heater, it was recommended that the set time of the fifth timer 219 be set to about the settling time for the hot water temperature of the oil-fired air conditioner/heater. It is sufficient to adopt the larger value of the settling time for the hot water temperature of the exchanger or the oil-fired air conditioner/heater. In this state, the output signal of the circuit 232 is 0. The role of the fifth timer 219 here is that when the output signal of the fifth self-holding circuit 217 becomes O, if the fifth timer 219 is not present, the oil-fired air conditioner and heater will be stopped and at the same time the heating This is to avoid the heat exchanger also stopping its operation.

Furthermore, when the heating load decreases and the hot water temperature in the ladder 19 rises from 55°C to ΔT2°C or more, the output of the function generator 230 becomes 1, and the output of the AND circuit 232 becomes 1.
becomes. Since the forced reset signal of the fourth self-holding circuit 2-3 becomes 1, the output signal of the fourth self-holding circuit 213 becomes O.) Starting/stopping sequence circuit 2 of heating heat exchanger
14, the hot water pump of the heating heat exchanger is stopped.

As mentioned above, when the heating load increases, the heating heat exchanger → oil-fired air conditioner → hot water goira are operated in the order of lowest operating cost; Heating equipment performs load-following operation, and heating equipment with low operating costs operates at the maximum allowable load to perform heating operations with low operating costs.

In each of the above embodiments, an example in which three air conditioning devices such as a cooling device and a heating device are used is explained, but the model of the air conditioning device is the above-mentioned machine 71 K 1'Ji.
Of course, the number of units used may be two or four or more, for example.

〔Effect of the invention〕

According to the present invention, in the cooling (heating) operation at the KonoEne plant, when the cooling (heating load increases L2), the electric motor is operated in order of lowest operating cost: absorption refrigerator (heating heat exchanger) → cooling Start-up is performed in the order of oil-fired air conditioner (oil-fired air conditioner) → oil-fired air conditioner (hot water boiler), and during operation, the air conditioner with the highest operating cost performs load-following operation, and the air conditioner with the lowest operating cost performs load-following operation. By performing load operation, operating costs for air conditioning equipment in a cogeneration plant can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an operating system for cooling equipment in a KonoEne plant according to an embodiment of the present invention, and Fig. 2 shows an operating system for heating equipment in a KonoEne brand according to another embodiment of the invention. A block diagram, FIG. 3 is a block diagram showing an example of the configuration of a cogeneration plant, FIG. 4 is a diagram showing an example of changes in cooling load during the cooling period, FIG. 5 is a diagram showing the flow of cold water in cooling boiler A, Fig. 6 shows the flow of hot water in the heating cycle, Fig. 7 shows the physical properties of the first function generator,
FIG. 8 is a diagram showing the characteristics of the second function generator, FIG. 9 is a diagram showing the characteristics of the third function generator, and FIG. 1O is a diagram showing the characteristics of the fourth function generator. 110... Cooling operation command device, 111... First function generator, 112... First AND circuit, 113...
First self-holding circuit, 115...first timer, 11
6... Second palm circuit, 117... Second self-holding circuit, 119... Second timer, 120... Third melon circuit, 12... Third self-holding Circuit, 123...
Third timer, 124... Fourth AND circuit, 125
...First NOT circuit, 126...Fifth AND circuit, 127...Sixth AND circuit, 128...Second
NOT circuit, 129... seventh AND circuit, 130
...Second function generator, 131...Third NOT circuit, 132...Eighth AND circuit, 133...Fourth
NOT circuit, 134... Ninth AND circuit, 210
... Heating operation command device, 21 No.... Third function generator, 212... Tenth leg circuit, 213... Fourth self-holding circuit, 215... Fourth timer, 216...
11th AND circuit, 217...5th self-holding circuit, 219...5th timer, 220...12th A
ND circuit, 22...Sixth self-holding circuit, 223...
...Sixth timer, 224...Thirteenth AND circuit,
225...Fifth NOT circuit, 226...Fourteenth AND circuit, 227...Fifteenth kite circuit, 228...
・6th NOT circuit, 229... 16th AND circuit, 230... 4th function generator, 231... 7th NOT circuit, 232... 17th AND circuit, 233
...8th NOT circuit, 234...18th melon circuit. Applicant's agent Patent attorney Takehiko Suzue 1 Figure 2 Figure 4 Figure 5 Figure 6 Figure 7''c (4 unspecified time) Figure 7 Figure 8 55-c! Hikai, ; side Figure 9 Figure 10

Claims (1)

[Claims] A plurality of air conditioning equipment including an air conditioning equipment that recovers the exhaust heat of the engine that drives the generator and uses the recovered heat as a heat source is provided, and the plurality of air conditioning equipment are installed in accordance with the air conditioning load. In a combined heat and power plant, when the air-conditioning load increases, the air-conditioning equipment with the lowest operating cost is started sequentially, and when the air-conditioning load decreases, the air-conditioning equipment with the higher operating cost starts up. An operating device for a combined heat and power plant, characterized by comprising an air conditioner start/stop sequence circuit that sequentially stops air conditioners from start to finish.