JPH11351638A - Electric power/heat amount working system for large-scaled store - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric power/heat amount working system for large- scaled store which assures standardization of an electric power load and has greater energy saving by enabling the use of only a commercial power supply in the night and the use of only electric power of an independent electric power plant without use of the commercial power supply in the daytime. SOLUTION: A freezing heat amount load 17 is cooled with cold brine cooled with a freezer 9 for the freezing heat amount load in the daytime and in the night, and a refrigeration heat amount load 18 is cooled using in the night ice water stored in an ice storage tank 12 with a freezer 10 for a refrigeration heat amount load in the night and is cooled with brine cold water from an absorptive freezer 13. For operation of each heat amount load only electric power of a commercial power supply 1 is employed in the night while only electric power of an independent electric power plant 4 is employed in the daytime.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric power / heat amount operation system for a large-scale store, and more particularly, to a heat load device such as a refrigeration / refrigeration system and an air-conditioning system in a large-scale store such as a supermarket and the like, and to efficiently use these electric power. Regarding systems that are frequently operated.

[0002]

2. Description of the Related Art In a large-scale store such as a supermarket, in order to reduce power consumption, the operation of air-conditioning and heat source equipment is limited to nighttime when power demand is low and power rates are low, and cold water and ice for cooling are stored at night. In addition, an energy-saving system is known that uses only this heat storage for cooling in the daytime.

[0003]

The power operation system as described above attempts to level the power load by shifting the peak of the power consumption. However, such leveling means alone is still used during nighttime and daytime. The imbalance in the consumption of general commercial power could not be sufficiently reduced. The heat load is
In addition to cooling and heating equipment, there are refrigeration calorie loads such as refrigeration showcases and refrigeration calorie loads such as refrigeration showcases. Unless the operation of these calorific loads is taken into consideration, sufficient leveling of the power load cannot be obtained.

[0004] The present invention has been made in view of such a problem, and an object of the present invention is to provide a private power generator that uses only a commercial power supply at night and uses no commercial power at daytime. An object of the present invention is to provide a power and heat operation system for a large-scale store that enables only electric power to be used, and has a large power load leveling and energy saving effect.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is to switch between a commercial power supply and a private power generator and use the heat load including a freezing / refrigeration heat load and an air conditioner in a store. In the power / calorie operation system of a large-scale store to be operated, the refrigeration calorie load is cooled by a cold brine cooled by a refrigeration calorie load refrigerator both day and night, and the refrigeration calorie load is refrigerated calorie load refrigerator at night. The ice water stored in the ice storage tank is cooled during the daytime by using the ice water stored in the ice storage tank during the daytime, and cooled during the daytime with the brine cold water from the refrigerator for loading the refrigerated calorific value. It is characterized in that only the power of the power source is used, and in the daytime only the power of the private power generator is used.

The hot water discharged from the private power generator is supplied to a desiccant air conditioner, which cools the desiccant air conditioner during the daytime. Further, the exhaust heat hot water of the private power generator is supplied to an adsorption refrigerator, and cooling is performed in the daytime with cold water from the adsorption refrigerator. In the present invention, at night, the operation is a business heat storage contract operation by purchasing power, and at daytime, the operation is performed using only the private power generator. At night, electric power is supplied to the refrigerating heat load refrigerator and the refrigerating heat load refrigerator using a commercial power supply. Cold brine is supplied from the refrigerating calorie load refrigerator to the refrigerating calorie load. In addition, ice produced by the refrigeration calorific load refrigerator is stored in an ice storage tank for cold storage, and ice water is supplied from the ice storage tank to the refrigeration calorie load to cool the refrigeration calorie load.

[0007] Further, brine cold water is supplied from the refrigeration calorific load refrigerator to the air conditioner, and cool air is supplied to the store air conditioning zone. In the daytime, electric power is supplied from the generator of the private power generation device to the refrigerating calorie load refrigerator, and the cold brine is supplied from the refrigerating calorie load refrigerator to the refrigerating calorie load and cooled. Then, the chilled heat load is cooled by supplying the ice water stored in the ice storage tank during the night to the chilled heat load during the day.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative positions, and the like of the structural components described in this embodiment are not intended to limit the scope of the present invention thereto, unless otherwise specified. It is only an example. In FIG. 1, reference numeral 1 denotes a commercial power supply (power purchase), and power is supplied from the power supply 1 to a power system interconnection 3 via a circuit breaker (POS) 2. Reference numeral 4 denotes a private power generator, which includes a power generator 5, a gas engine 6 for driving the power generator 5, and a radiator 7 for releasing heat of the power generator 5 and the gas engine 6. The power of the generator 5 is also supplied to the power system interconnection 3. The power system interconnection 3 is branched into a system for the intermediate period, winter and general power 8 and a system for the refrigerator 9 for refrigeration calorie load and the refrigerator 10 for refrigeration calorie load. It can be switched.

[0009] From the refrigerating calorie 9 for loading the refrigerating calorie, a line P1
, The brine is supplied to the refrigeration showcase 17 in the illustrated example, and is frozen at -20 ° C.
Further, the refrigerant is supplied from the refrigeration heat load refrigerator 10 to the dynamic ice maker 11 via the pipeline P5, and the obtained ice is stored in the ice storage tank 12. Ice storage tank 12
Is supplied to the refrigeration heat load, in the illustrated example, to the refrigeration showcases 18 and 19 through the line P7.
Cooled to ° C.

As electric power consumed at night, electric power from the commercial power source 1 of the electric power company is used, and the electric power is used to operate the refrigerating heat load refrigerator 9, the refrigerating heat load refrigerator 10, and other loads. It has become. Private power generator 4
Waste heat of the radiator 7 is supplied from the line P2 to the adsorption type refrigerator 13
And desiccant air conditioner 14.

The adsorptive refrigerator 13 has an adsorbent / desorber filled with an adsorbent for adsorbing / desorbing refrigerant vapor, a condenser for condensing refrigerant vapor desorbed from the absorbent, and an outlet / outlet from the condenser. A flow control valve for controlling the flow rate of the cooled refrigerant vapor,
An evaporator for evaporating the refrigerant liquid flowing through the flow control valve is provided, and the refrigerant vapor evaporated by the evaporator is adsorbed to the adsorber, and various types are known. And may be of any type.

Next, the operation based on the above configuration will be described. In the nighttime (for example, 20:00 to 8:00), the operation of the commercial heat storage contract is performed by purchasing power, and in the daytime (for example, 8:00 to 22:00), the private power generator 4 is operated.
Operation using This switching is performed by the power system interconnection 3. First, the operation at night will be described. In the nighttime, the commercial power supply 1 is used to supply electric power to the refrigerator 9 for refrigeration calorie load and the refrigerator 10 for refrigeration calorie load. Cold brine is supplied from the freezing calorie load refrigerator 9 to the frozen showcase 17 via the pipeline P1, and the frozen showcase 17 is cooled.

A refrigerant is supplied from a refrigerator 10 for refrigeration calorific load to a dynamic ice maker 11, and ice is made by the dynamic ice maker 11. The ice is stored in an ice storage tank 12 for cold storage. Ice water is supplied from 12 to the refrigerated showcases 18 and 19 via the pipeline P7, and the refrigerated showcases 18 and 19 are cooled.

Further, brine cold water is supplied from the refrigeration calorific load refrigerator 10 to the air conditioner 15 via the pipe P4, and cold air is supplied from the outlet 20 to the store air conditioning zone 21 via the pipe P6. Lighting and other general power are also provided by the commercial power supply 1.

Next, the operation in the daytime will be described. In the daytime, the power system interconnection 3 is switched to use only the private power generator 4 without using the commercial power supply 1. Similarly, power is supplied from the generator 5 of the in-house power generator 4 to the refrigeration calorie load refrigerator 9, and the refrigeration calorie load refrigerator 9 is connected to the pipeline P 1.
The cold brine is supplied to the frozen showcase 17 through the, and the frozen showcase 17 is cooled. Then, ice water stored in the ice storage tank 12 at night is supplied to the refrigerated showcases 18 and 19 through the pipeline P7 to cool the refrigerated showcases 18 and 19. That is, during the daytime, the refrigerator showcases 18 and 19 are operated only with the cooling water in the ice storage tank 12 without supplying power to the refrigerator 10 for refrigeration calorific load.

In the daytime, the exhaust heat of the radiator 7 is supplied to the adsorption refrigerator 13 and the desiccant air conditioner 14 through the pipe P2. The cooling water from the adsorption refrigerator 13 is supplied to the air conditioner 15 via the pipe P3, and is supplied to the store air conditioning zone 21 from the outlet 20 via the pipe P6 as described above.

The desiccant air conditioner 14 is an air conditioner of a type that removes humidity (latent heat) with a desiccant (desiccant). The desiccant air conditioner 14 includes a regeneration hot water coil 22, an evaporative cooler 23, a dehumidifying rotor 24, and a desiccant rotor 25. Have. The outside air 26 taken into the processing side is removed of moisture when passing through the dehumidification rotor 24, the temperature is reduced by the cooler 23, and the outside air 26 is supplied to the desiccant air conditioning zone 27.

On the other hand, on the reproduction side, the environment 2
8 is passed through the cooler 23 to lower the temperature, and the heat required by the desiccant rotor 25 is heated by the regeneration hot water coil 22 and then passed through the desiccant rotor 25 to evaporate and remove the moisture in the desiccant rotor 25. It becomes high-temperature and high-humidity air and is exhausted 29 into the atmosphere. In addition, such a desiccant air conditioner is known. In the present invention, the hot water of the radiator 7 of the private power generator 4 is supplied to the hot water coil 22 for regeneration, and the exhaust heat of the private power generator 4 is effectively used.

[0019]

As described in detail above, according to the present invention, the refrigeration heat load is cooled by the cold brine cooled by the refrigeration heat load refrigerator both day and night, and the refrigeration heat load is reduced at night. The ice water stored in the ice storage tank by the load refrigerator is cooled during the daytime by using the ice water stored in the ice storage tank, and is cooled in the daytime by the brine cold water from the refrigerator for loading the refrigeration calorific value. In the daytime, it is possible to operate the calorific load only with the power of the private power generator without using the commercial power, and to achieve the leveling of the power load. The use of only cheap nighttime has a great effect on energy saving and resource saving.

[Brief description of the drawings]

FIG. 1 is a system diagram of a power / heat quantity operation system of a large-scale store according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Commercial power supply 2 Power system interconnection 4 Private power generator 5 Generator 7 Ladeta 9 Refrigeration heat load refrigerator 10 Refrigeration heat load refrigerator 11 Dynamic ice machine 12 Ice storage tank 13 Adsorption type refrigerator 14 Desiccant air conditioner 15 Air conditioner 17 Frozen showcase (refrigerated calorie load) 18 Refrigerated showcase (refrigerated calorie load)

Claims (3)

[Claims] 1. A large-scale store power and heat operation system for operating a heat load including a freezing / refrigeration heat load and an air conditioner in a store by switching and using a commercial power supply and a private power generator. The load is cooled by a cold brine cooled by a freezing heat load refrigerator both day and night, and the cold heat load is cooled at night using ice water stored in an ice storage tank by the cold heat load refrigerator. At the same time, cooling is performed in the daytime with brine chilled water from the refrigeration calorific load refrigerator, and the operation of each calorific load is only the power of the commercial power supply at night and only the power of the private power generator at daytime. Power and heat management system for large-scale stores. 2. The electric power and calorie operation system for a large-scale shop according to claim 1, wherein hot water discharged from the private power generator is supplied to a desiccant air conditioner, and the desiccant air conditioner cools the hot water during the daytime. . 3. The method according to claim 1, wherein hot water discharged from the private power generator is supplied to an adsorption refrigerator, and cooling is performed in the daytime with cold water from the adsorption refrigerator. Power and heat management system for large-scale stores.