JPH0618107A - Ice and hot-water double heat accumulation system - Google Patents

Abstract

PURPOSE:To form an ice heat accumulation section and a hot-water heat accumulation section on each flow path side of a fluid to be cooled and a fluid to be heated respectively, and to supply cold and warm heat simultaneously by using brine as the fluid to be cooled and water as the fluid to be heated respectively in a heat pump cycle. CONSTITUTION:An evaporator is used for extracting a fluid to be cooled and a condenser for extracting a fluid to be heated in a heat pump 5. Brine used as the fluid to be cooled is circulated in an ice heat storage tank 6' and a cooled-fluid circulating flow path 2 is disposed at that time, thus forming an ice heat accumulating section 6. On the other hand, water employed as the fluid to be heated is circulated in a hot-water heat storage tank 7', and a hot-water heat accumulating section 7 is arranged. Ice heat accumulation and hot-water heat accumulation are conducted in the night, in which power load is reduced. Cold water by heat exchange from the ice heat accumulating section 6 or cold water 11, 11' by ice melting by the temperature rise of brine at the time of the stoppage of the heat pump 5 is extracted in the day, in which power load is increased. Hot water 12 is taken out by heat exchange from the hot-water heat accumulating section 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to cold and hot heat supply in the food service industry and cold and hot heat supply in processing steps in other industrial fields.

[0002]

2. Description of the Related Art Conventionally, cold heat and warm heat supply are individual systems according to heat loads. When cold and warm heat are required at the same time, there are many cases where the heat storage method is not adopted due to restrictions on the installation location.

When the heat storage method is adopted, it is as follows. (1) Cold water is stored separately. (2) Store hot water independently. (3) Store cold water and hot water at the same time. (4) Ice is manufactured separately and heat is stored. The above heat storage method has a problem that it is difficult to be adopted because it requires a place.

To solve this problem, a one-source heat pump and a two-source heat pump capable of simultaneously supplying cold and hot fluids have been developed.
A technique for raising the temperature to near 00 ° C. is known (Japanese Patent Laid-Open No. 2-1
95130, JP-A-2-195162, JP-A-3-
148564).

However, a heat storage and utilization system for cold / hot fluid has not been developed, and a power load leveling system has not been developed.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to provide an installation system having a small installation area, capable of simultaneously supplying cold / hot heat, and simultaneously storing cold / hot heat and an inexpensive utilization system.

[0007]

In order to achieve the above object, the present invention provides a heat pump cycle in which an evaporator is for taking out a fluid to be cooled and a condenser is for taking out a fluid to be heated.
By using brine as the fluid to be cooled and water as the fluid to be heated, an ice heat storage portion is formed simultaneously on the flow passage side of the fluid to be cooled and a hot water heat storage portion is formed on the flow passage side of the fluid to be heated. Water double heat storage system Cascade in which the evaporator is for a low-boiling refrigeration cycle, the condenser is for a high-boiling refrigeration cycle, and the condenser for the low-boiling refrigeration cycle and the evaporator for the high-boiling refrigeration cycle perform heat exchange Ice / hot water double heat storage system according to the above invention, which is a dual heat pump cycle equipped with a condenser. Ice / heat according to the above-mentioned first or second invention, wherein cold water is taken out from the ice heat storage part and hot water is taken out from the hot water heat storage part. Double water heat storage system A switching flow path is provided in parallel with the ice heat storage unit on the flow path side of the fluid to be cooled, and cold water is taken out from the fluid to be cooled flowing through the switching flow path by heat exchange. 3 constituted by an ice-hot water Double thermal storage system according respectively to the invention.

[0008]

In the present invention, the brine used as the fluid to be cooled in the one- or two-way heat pump cycle 5 is circulated in the ice heat storage tank 6'to form the cooled fluid circulation passage 2 and the brine is circulated in the tank 6 '. The supplied water can be frozen to form the ice heat storage section 6.

At the same time, the water used as the fluid to be heated is circulated in the hot water heat storage tank 7'and the high temperature steam and hot water are stored in the tank 7'to form the hot water heat storage section 7. is there.

The ice heat storage and the hot water heat storage are performed at night when the electric power load is small, and during the daytime when the electric power load is large, the ice heat storage unit 6
From cold water by heat exchange 11, 11 'or heat pump 5
The cold water 11, 11 'is taken out by ice melting due to the temperature rise of the brine at the time of stop, and this is used, and the hot water 12 or hot water is taken out from the hot water heat storage section 7 by heat exchange to reduce the daytime electric power load.

During the daytime, the heat pump 5 is operated to circulate the fluid to be cooled by the brine in the switching passage 13,
Molten cold water 11 'taken out by the temperature rise of the flow stop brine from the above-mentioned ice heat storage unit 6 in which the shortage has already been frozen at night by directly exchanging heat with the fluid to take out cold water 11'.
It is something to make up for.

[0012]

EXAMPLE A circulation channel 2 for taking out a fluid to be cooled is allowed to flow through an evaporator 1 of a low boiling point refrigeration cycle 8 using a low boiling point refrigerant such as CFCs R-12, R-22, and CFCs R-113, R-22.
A condenser 3 for a high-boiling refrigeration cycle 9 such as -114 is made to flow through a circulation flow path 4 for taking out a fluid to be heated, and a condenser for the low-boiling refrigeration cycle 8 and an evaporator for the high-boiling refrigeration cycle 9 are provided. The heat pump 5 according to the binary heat pump cycle (FIGS. 4 and 5) provided with the cascade condenser 10 for heat exchange is used or the heat pump 5 shown in FIG.

Brine (ethylene glycol aqueous solution, salt water, etc.) is used as the fluid to be cooled, and water is used as the fluid to be heated.
The circulation flow path 2 for the fluid to be cooled is installed in the ice storage tank 6'with the pipe 2 '.
Then, the supply water is frozen to form the ice heat storage section 6. Further, a hot water heat storage tank 7'is provided in the circulation flow path 4 for the fluid to be heated to form a hot water heat storage portion 7, and both heat storage portions 6 and 7 are formed at the same time. It is a well-known technique that the temperature of the fluid to be heated reaches nearly 100 ° C. by using the brine to bring the temperature below the freezing point (Japanese Patent Laid-Open Nos. 2-195130 and 2).
-195162).

Water can be taken out as cold water 11 by heat exchange by passing water through the ice heat storage tank 6 '.
The flow of the fluid to be cooled in the pipe 2'in the tank 6'is stopped, and the temperature rise due to this stops the ice-melting cold water 11 in the ice storage tank 6 '(FIGS. 3 and 4). Further, the cold water 11 is introduced into the cold water tank 14, and the second water is allowed to flow through the cold water tank 14 to perform the second heat exchange.
1 ', which is circulated through the cooling load 15 (FIG. 1,
(Fig. 2).

In the flow path 2 for the fluid to be cooled, a switching flow path 13 is provided in parallel with the flow path to the ice heat storage section 6 via a switching valve 16, and the flow path 13 is arranged in a water tank 17 '. , The aquarium 1
The brine / water heat exchanger 17 is formed by directly exchanging heat with the water flowing through the inside of 7 ', and this water is made into cold water 11' and circulated through the cooling load 15 (FIG. 2).

The fluid to be heated is provided with a water pipe in the hot water heat storage tank 7'to form hot water 12 by heat exchange and circulate this to the heating load 18. The hot water 12 is heated in the hot water heat storage tank 7 ′ to a temperature close to 100 ° C. due to heat exchange of the running water in the water pipe.

The reference numeral 19 in the figure indicates a brine pump,
20 is a water replenishing tank, 21 is a brine replenishing tank, 22 is a hot water pump, 23 is an air cooling fan, 24 in FIG. 4 and 5 is an accumulator, 25 is an expansion valve, 26 in FIG. 5 is an economizer, and 27 is A liquid receiving tank, 28 is a flow rate adjusting valve, 29 is a control device, 30 is a compressor, 31 in FIG. 3 is a brine inlet, and 32 is a brine outlet.

[0018]

Since the present invention is based on the above-mentioned system, the ice heat storage section 6 is provided by the fluid to be cooled taken out from the evaporator 1 of the heat pump cycle, and the hot water heat storage section is provided by the fluid to be heated taken out from the condenser 3. 7 can be formed at the same time, and both heat storage parts 6, 7 can be formed by one heat pump 5.
Is formed, the installation area is small, and there is an effect that the installation restriction can be solved. Then, cold water 11, 11 'can be taken out from the ice heat storage section 6 by heat exchange or ice melting, hot water 12 can be taken out from the hot water heat storage section 7 by heat exchange, and the cold water 11, 11' and heat can be taken out by using nighttime power. The water 12 may be used during the daytime and electricity consumption during the daytime may be omitted. Further, when the cold water is taken out by the electric power in the daytime, the switching flow path 13 is used, and the deficient portion can be taken out from the ice heat storage section 6 formed at night and melted cold water 11 and 11 'can be replenished to be useful for the peak cut of the daytime electric power load. be able to.

[Brief description of drawings]

FIG. 1 is a block diagram showing an ice / hot water double heat storage system of the present invention.

FIG. 2 is a block diagram showing a switching flow path by a solid line.

FIG. 3 is an explanatory diagram of internal piping of an ice heat storage tank.

FIG. 4 is a piping diagram of an ice heat storage tank.

FIG. 5 is a block diagram of a conventional heat pump cycle.

FIG. 6 is a block diagram of a binary heat pump cycle.

FIG. 7 is a block diagram of a dual heat pump cycle with an economizer.

[Explanation of symbols]

 1 Evaporator 2 Cooled fluid flow path 3 Condenser 4 Heated fluid flow path 5 Heat pump 6 Ice heat storage part 7 Hot water heat storage part 8 Low boiling point refrigeration cycle 9 High boiling point refrigeration cycle 10 Cascade condenser 11, 11 'Cold water 12 Hot water 13 Switching flow path

Front page continuation (72) Inventor Toshiaki Okada 1-23-35 Nanogawa Minami-ku, Fukuoka City Kyudenko Corporation (72) Inventor Masami Ogata 1-15-10 Himesato Nishiyodogawa-ku, Osaka Nishiyodo Air Conditioner Within the corporation

Claims (4)

[Claims] 1. A heat pump cycle in which an evaporator is used for taking out a fluid to be cooled and a condenser is used for taking out a fluid to be heated, by using brine as a fluid to be cooled and water as a fluid to be heated. An ice / hot water double heat storage system characterized in that an ice heat storage portion is formed on the road side and a hot water heat storage portion is formed simultaneously on the flow passage side of a fluid to be heated. 2. The evaporator is for a low boiling point refrigeration cycle, the condenser is for a high boiling point refrigeration cycle, and the condenser for a low boiling point refrigeration cycle and the evaporator for a high boiling point refrigeration cycle perform heat exchange. The ice / hot water double heat storage system according to claim 1, wherein the ice / hot water double heat storage system is a binary heat pump cycle equipped with a cascade condenser. 3. The ice / hot water double heat storage system according to claim 1, wherein cold water is taken out from the ice heat storage portion and hot water is taken out from the hot water heat storage portion. 4. The cooling water is taken out by heat exchange from the fluid to be cooled which flows through the switching passage by providing a switching passage in parallel with the ice heat storage section on the fluid passage side of the fluid to be cooled. ) Or
Ice / hot water double heat storage system described in (3).