JPH1026376A - Heat supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a thermal loss caused by a heat exchanger by directly supplying an output heat of a heat pump to a load without using a heat exchanger at the time of generating heat. SOLUTION: This heat supply device comprises a thermal storage system which includes an ice thermal storage tank and a heat thermal storage tank, a heat generating system 2 which refrigerates brine and heats hot water, a brine/chilled water heat exchanger 3 which refrigerates chilled water by the brine, a brine passage which circulates the brine through the heat producing system 2, the ice thermal storage tank and the brine/chilled water heat exchanger 3 by means of a pump 13, a hot water circulation passage 5 which circulates hot water between the heat generating system 2 and the heat thermal storage tank by means of a pump 26, and a load side piping passage which includes a pipe which transports cold heat and heat to a load side and receives them again from the load side, a supply pump and other piping-oriented equipments. In the above construction, the thermal storage systems 1 comprises an ice exclusive tank 7, an ice and heat tank 8, a heat exclusive tank 9 and pipes which connect these tanks. The ice and heat common tank 8 is operated as an ice thermal storage tank in summer and as a heat storage tank in winter.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cold / hot heat supply device for supplying cold water and hot water to a load.

[0002]

2. Description of the Related Art Conventionally, there are various types of ice heat storage systems such as an external melting type, an internal melting type, and a dynamic type. Among them, an internal melting type ice heat storage tank is capable of increasing an ice fraction, and is most often used. A promising system.

[0003]

The internal melting type ice heat storage system has the following two problems when storing heat in winter. The first problem is that the loss in the heat exchanger is large. That is, the brine is heated by the hot water which is the heat pump output, and the brine is used to heat the hot water for heat storage, so that a double temperature loss is caused by the heat exchanger.

[0004] The second problem is that it is difficult to cope with a cooling load in winter. That is, the heat storage tank is divided into a warm heat tank and a cold heat tank, and the heat pump is set to the warm mode in winter,
Since the operation must be performed in the cold mode, the life of the heat pump is shortened by the switching particularly when the outside air temperature is low.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and it is an object of the present invention to provide a long-life cold / heat supply apparatus which eliminates the drawbacks of the above-mentioned internal melting type ice heat storage system and has a small heat loss during hot heat production. With the goal.

[0006]

In order to solve the above-mentioned problems, the invention described in claim 1 is a heat storage system including at least an ice heat storage tank and a hot heat storage tank, and a cold / hot heat production for cooling brine and heating hot water. A system, a brine / cold water heat exchanger for cooling cold water with brine, a brine path for circulating brine by a pump between the cold / hot heat production system, the ice storage tank of the heat storage system and the brine / cold water heat exchanger, A hot water circulation path for circulating hot water by a pump between the cold / hot heat production system and the heat storage tank of the heat storage system, a pipe formed by a pipe, a supply pump, and a pipe-related device for transporting cold and hot heat to the load side and receiving it again from the load side A cold / hot heat supply device comprising a side piping path, wherein the heat storage system is an ice bath, an ice / heat bath, and a heat bath. Is constituted by a pipe connecting these, ice-heat combined tank, in summer to winter as an ice thermal storage tank, characterized in that actuating the thermal storage tank.

According to a second aspect of the present invention, in the cold / hot heat supply device according to the first aspect, the brine path extends from a cold / hot heat production system, a high-temperature header, a low-temperature header, and the high-temperature header. One or more brine cooling paths that send brine to the cold header via the cold / hot heat production system, load piping routes from the cold header through the brine / cold water heat exchanger to the hot header, a cold header One or more piping paths dedicated to cold storage from the heat storage system to the high-temperature header via the dedicated ice tank, and from the low-temperature header to the high-temperature header via the ice / heat storage tank of the heat storage system. Having the above summer cooling pipe route, having a pump in the brine cooling route and the load piping route, the cooling heat storage dedicated piping route and the summer cooling piping route are Characterized in that does not have a pump.

The invention according to claim 3 is a heat storage system including at least an ice heat storage tank and a hot heat storage tank, a cold / hot heat production system for cooling brine and heating hot water, and a brine / cooling system for cooling cold water by brine. A chilled water heat exchanger, a chilled water refrigerator for cooling return water from the chilled water load, and a brine for circulating brine between the cold / hot heat production system, the ice storage tank of the heat storage system, and the brine / cold water heat exchanger by a pump. Path, a hot water circulation path for circulating hot water by a pump between the cold / hot heat production system and the heat storage tank of the heat storage system, transporting cold and hot to the load side,
A cold / hot heat supply device comprising a load-side piping route constituted by a pipe received again from the load side and the supply pump and a pipe-related device, wherein the heat storage system includes a tank for exclusive use of cold water, and a tank for both ice and heat. The ice / heat tank is operated as an ice heat storage tank in summer and as a heat storage tank in winter, and the return water from the load passes through a cold water tank. The pump is sent from the chilled water refrigerator to the brine / chilled water heat exchanger.

According to a fourth aspect of the present invention, in the cold / hot heat supply device according to the third aspect, the brine path includes a cold / hot heat production system, a high temperature side header, a low temperature side header, and the high temperature side header. One or more brine cooling paths that send brine to the cold header via the cold / hot heat production system, load piping routes from the cold header through the brine / cold water heat exchanger to the hot header, a cold header Has at least one summer cooling / heating piping route from the heat storage system to the high-temperature side header via the ice / heating tank, and has a pump in the brine cooling route and the load piping route, and has a summer cooling / heating piping route. Is characterized by not having a pump.

[0010] The invention according to claim 5 is a heat storage system including at least an ice heat storage tank and a hot heat storage tank, a cold / hot heat production system for cooling brine and heating hot water, and a brine / cooling system for cooling cold water by brine. A chilled water heat exchanger, a chilled water refrigerator for cooling return water from a chilled water load, a brine path for circulating brine between the chilled / hot heat production system, the ice storage tank and the brine / chilled water heat exchanger by a pump, A hot water circulation path for circulating hot water by a pump between a hot heat production system and a heat storage tank of the heat storage system, a pipe for transporting cold and hot heat to the load side, receiving it again from the load side, and the supply pump and pipe-related devices; A cold / hot heat supply device comprising a load-side piping route, wherein the heat storage system comprises an ice bath, an ice / heat bath, and a heat bath. A tub, a chilled water refrigerator, and a pipe connecting the chilled water and the chilled water chiller, wherein the ice / heat storage tank operates as an ice heat storage tank in summer and as a hot water tank in winter, and the return water from the load is To a brine / cold water heat exchanger.

According to a sixth aspect of the present invention, in the cold / hot heat supply apparatus according to the fifth aspect, the brine path is formed from a cold / hot heat production system, a high-temperature header, a low-temperature header, and the high-temperature header. One or more brine cooling paths that send brine to the cold header via the cold / hot heat production system, load piping routes from the cold header through the brine / cold water heat exchanger to the hot header, a cold header One or more piping paths dedicated to cold heat storage from the low-temperature header to the high-temperature header through the dedicated ice tank of the heat storage system;
It has at least one summer cooling piping route to the high-temperature header via the hot / cold tank, has a pump in the brine cooling route and the load piping route, and has a pump in the cooling heat storage dedicated piping route and the summer cooling piping route. It does not have it.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a flow chart of the cold / hot heat supply device according to the first aspect of the present invention. Reference numeral 1 denotes a heat storage system, which includes an ice tank 7, an ice / heat tank 8, and a heat tank 9. 2 is a cooling / cooling system for cooling brine and heating hot water.
The thermal production system includes a brine refrigerator 19 and a thermal heat pump 20.

Reference numeral 3 denotes a brine / cold water heat exchanger for cooling chilled water by brine. Reference numeral 4 denotes a pump 13 between the cold / hot heat production system 2, the ice heat storage tank (ice dedicated tank 7 and ice / hot combined use tank 8) and the brine / cold water heat exchanger 3.
This is a brine path for circulating brine. Reference numeral 5 denotes the cold / hot heat production system 2 and a hot water heat storage tank (ice / heat / heat tank 8).
And a hot water circulation path in which hot water is circulated by the pump 26 between the hot water tank 9).

Reference numeral 6 denotes a load-side piping route comprising pipes 31, 33, 34, and 36 and supply pumps 32, 35 for transporting cold and hot heat to the load side and receiving it again from the load side. As described above, the heat storage system 1 is configured by the ice exclusive tank 7, the ice / heat combined tank 8, the thermal exclusive tank 9, and the pipes connecting these, and the like. There are four modes: a summer daytime mode, a summer midnight mode, a winter daytime mode, and a winter midnight mode.

"Summer daytime mode"
The heat and heat tank 8 serves as an ice storage tank, and the temperature in the brine path 4 is, for example, a plus temperature of 5 to 12 ° C. The flow of the brine in the brine path 4 is a brine / cold water heat exchanger 3 → pipe 10 → high temperature side header 11 → pipe 12 → pump 13 → cold / hot heat production system 2 → low temperature header 14 → pipe 15 → three-way automatic control valve 15 →→ pump 16 → brine / cold water heat exchanger 3

In addition to the circulation path, the high-temperature side header 11 → piping 12 → pump 13 → cooling / heating system 2
→ Low temperature side header 14 → Piping 17, 18 → Ice exclusive tank 7,
Since there is also a circulation of the combined use of the ice and heat tank 8 and the high-temperature header 11, the temperature in the low-temperature header 14 is controlled by the heat storage system 1.
And the cooling / heating manufacturing system 2. However, the cooling / heating manufacturing function of the cooling / heating manufacturing system 2 is not operated on a day when the load is small or during a peak time of the electric power. The load control is normally controlled by a three-way automatic control valve 15 '.

As shown in the figure, the cold / hot heat production system 2 may be a binary system in which a brine refrigerator 19 and a heat heat pump 20 are arranged in series via an intermediate water pipe, or a single heat pump.

In the case of the binary system shown in the figure, reference numeral 21 denotes a heat source or a heat sink such as sewage water for adjusting the imbalance between the heating load and the cooling load. That is, when the cooling load is large, the cooling fluid is supplied from the pipe 22 and discharged from the pipe 23. When the thermal load is large, the water is heated via the heat exchanger 25 by the sewage treatment water or the like supplied from the pipe 24.

In the hot water circulation path 5, the pump 26 returns to the tank dedicated to heat 9 → the valve 27 → the pump 26 → the nozzle 28 → the hot sheet pump 20 → the nozzle 29 → the tank 9 dedicated to the heat. However, when the capacity of this heat pump is large, this pump 2
6 and the heat pump 20 are not operating.

The chilled water from the chilled water load flows from the return pipe 31 → the brine / chilled water heat exchanger 3 → the chilled water supply pump 32 → the chilled water supply pipe 33 → the load side. Further, the hot water from the hot water load is supplied to the flow load through the pipe 34 → the tank 9 exclusively for heating / heating → the hot water supply pump 35 → the hot water supply pipe 36.

"Summer Midnight Mode" In the midnight summer mode, the pump driving inverters of the cold water supply pump 32 and the hot water supply pump 35 rotate at low speed, and the supplied cold water and hot water have small flow rates. The temperature in the brine path 4 is, for example, -6 to
A negative temperature of -2 ° C. Most of the low-temperature brine sent from the brine refrigerator 19 to the low-temperature side header 14 is mostly the low-temperature side header 14 → pipes 17 and 18 → ice tank 7, ice / heat / heat tank 8 → high temperature side header 11 → pipes 12
It circulates from the pump 13 to the cold / hot production system 2 to the low-temperature header 14.

Low temperature side header 14 → pipe 15 → pump 1
6 → brine / cold water heat exchanger 3 → pipe 10 → high temperature side header 11 the flow rate is small. That is, ice heat storage is performed by this midnight operation. In the hot water circulation path 5, a pump 26 is used to heat and heat the tank 9 → a valve 27 →
The pump 26 → nozzle 28 → heat heat pump 20 → nozzle 29 → valve 30 → reserved heat tank 9 is returned.
Operation stops.

"Winter daytime mode" In the winter daytime mode, the ice / heat tank 8 serves as a heat tank, and the flow of the brine in the brine path 4 is the same as that of the "summer daytime mode". 10 → High temperature header 11 → Piping 1
2 → pump 13 → cold / hot heat production system 2 → low temperature side header 14 → pipe 15 → 3-way automatic control valve 15 ′ → pump 16 → brine / cold water exchanger 3

In addition to this circulation, the high temperature side header 11
→ Piping 12 → Pump 13 → Cold / hot heat production system 2 → Low temperature side header 14 → Piping 17 → Ice only tank 7 → High temperature side header 11 Because there is a circulation, the temperature in the low temperature header 14 is stored in the heat storage tank (Ice only tank). 7) and cooling / heating manufacturing system 2
Cooled by both.

In this mode, the valves 37, 3
8 is closed. In the hot water circulation path 5, the pump 26 is used to heat the tank 9 or the ice / heat tank 8 → the valve 27.
Or, 40 → pump 26 → nozzle 28 → heat heat pump 20 → nozzle 29 → valve 30 or 39 → heat tank 9 or ice / heat tank 8

"Winter late night mode" In the winter late night mode, the inverters for driving the cold water supply pump 32 and the hot water supply pump 35 rotate at a low speed as in the summer late night mode, and the supplied cold water and hot water have small flow rates. The temperature in the brine path 4 is, for example, a negative temperature of −6 to −2 ° C. Most of the low-temperature brine sent from the brine refrigerator 19 to the low-temperature header 14 is supplied from the low-temperature header 14 to the piping 17.
→ Circulation with the exclusive ice tank 7 → the high temperature side header 11 → the pipe 12 → the pump 13 → the cold / hot heat production system 2 → the low temperature side header 14.

Low temperature side header 14 → pipe 15 → pump 1
6 → brine / cold water heat exchanger 3 → pipe 10 → high temperature side header 11 the flow rate is small. That is, ice heat storage is performed by this midnight operation. In the hot water circulation path 5, the pump 26 is used to heat and heat the tank 9, the ice / heat / heat tank 8 → the valve 27 or 40 → the pump 26 → the nozzle 28.
→ Heat heat pump 20 → Nozzle 29 → Valve 30 or 39 → Return to tank 9 dedicated to heating or tank 8 serving both ice and heat.

FIG. 2 is a flow chart of the cooling / heating heat supply apparatus according to the third aspect of the present invention. Unlike FIG. 1, a dedicated ice tank 7
Is a cold water heat storage tank 7 ′, and is provided with not only the brine refrigerator 19 but also a cold water refrigerator 41.

"Summer daytime mode" The operation of the summer daytime mode in this system is different from that of FIG. 1 as follows. The return water from the cold load temporarily flows into the upper part of the cold water storage tank 7 '. Then, at a peak time or the like, cold water having a low temperature below the cold water storage tank 7 ′ is supplied from the pipe 42 to the load side from the cold water supply pipe 33 by the cold water supply pump 32. Normally, at times other than the peak time, return water from the load is returned to the return pipe 31 → the cold water storage tank 7 ′ → the pipe 43 → the pump 44 → the cold water refrigerator 41 → the brine / cold water heat exchanger 3 → the control valve 45 → the cold water supply pump 32. → It is supplied from the cold water supply pipe 33 to the load side.

"Summer Late Night Mode" In the late summer night mode, the chilled water from the pipe 46 is sent to the load side somewhat from the control valve 45, but most of the chilled water is transferred to the chilled water storage tank 7 'via the control valve 47. Sent and stored cold.

"Winter daytime mode", "Winter midnight mode" In both the winter daytime mode and the winter midnight mode, the ice / heat / heat tank 8 is used.
Is the same as the summer daytime mode and summer midnight mode except that it operates as a thermal bath. However, the waste heat from the cold water refrigerator 41 flows through the pipe 48 → the header 49 → the hot heat pump 20 → the header 50 → the pipe 51, and becomes a heating source of the hot heat pump 20. The chilled water refrigerator 41 of this system can supply the obtained chilled water at a high evaporation heat temperature and with high efficiency without exergy loss due to the heat exchanger.

FIG. 3 is a flow chart of the cooling / heating heat supply apparatus according to the fifth aspect of the present invention. This system is almost the first
Although the configuration is the same as that of the system shown in the drawing, a chilled water refrigerator 41 is provided similarly to the system shown in FIG.

"Summer daytime mode" The operation of the system in the summer daytime mode in this system is different from that of FIG. 1 as follows. The return water from the cold load is returned to the return pipe 31 → the cold water refrigerator 41 → the brine / cold water heat exchanger 3 → the cold water supply pump 32
→ It is supplied from the cold water supply pipe 33 to the load side.

"Winter daytime mode" In the winter daytime mode, waste heat from the chilled water refrigerator 41 flows through the pipe 48 → the header 49 → the hot heat pump 20 → the header 50 → the pipe 51,
It is a heating source of the heat pump 20. In this system, since the heat storage tank in winter is also an ice heat storage operation, heat cannot be stored by the chilled water refrigerator 41 and the power of the compressor increases.
The volume of the tank becomes smaller.

[0035]

As described above, according to the present invention, the following excellent effects are obtained. (1) The cold / hot heat supply device according to the first to sixth aspects can directly supply the heat output from the heat heat pump to the load without passing through the heat exchanger at the time of the production of heat, so that energy is saved as compared with the conventional method. .

(2) In addition to the effect of the above (1), the cooling / heating heat supplying device according to the first aspect has an effect that the device becomes very simple.

(3) In addition to the effect of (1), the cold / hot heat supply device according to claims 3 and 5 supplies cold water obtained at high evaporation temperature and high efficiency in the cold water refrigerator. There is an effect that can be.

(4) The cooling method according to the second, fourth and sixth aspects.
In the same season, the heat supply device can support “midnight heat storage / low load operation”, “day load / energy saving operation”, and “day load / peak cut operation” without operating a switching valve or the like.

[Brief description of the drawings]

FIG. 1 is a flowchart of a cooling / heating heat supply device according to the first aspect of the present invention.

FIG. 2 is a flow chart of the cooling / heating heat supply device according to the third aspect of the invention.

FIG. 3 is a flow chart of the cooling / heating heat supply device of the invention according to claim 5;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Thermal storage system 2 Cold / hot heat production system 3 Brine / cold water heat exchanger 4 Brine path 5 Hot water circulation path 6 Load side piping path 7 Ice dedicated tank 8 Ice / hot combined tank 9 Hot dedicated tank 10 Pipe 11 High temperature side header 12 Pipe DESCRIPTION OF SYMBOLS 13 Pump 14 Low-temperature side header 15 Pipe 16 Pump 17 Pipe 18 Pipe 19 Brine refrigerator 20 Heat heat pump 21 Heat source or heat sink such as sewage treatment water for adjusting heating / cooling load 22 Pipe 23 Pipe 24 Pipe 25 Heat exchanger 26 Pump 27 valve 28 nozzle 29 nozzle 30 valve 31 return pipe

Claims (6)

[Claims] 1. A heat storage system including at least an ice heat storage tank and a hot heat storage tank, and a cooling / cooling system for cooling brine and heating hot water.
A hot heat production system, a brine / cold water heat exchanger for cooling cold water with brine, and a brine path for circulating brine between the cold / hot heat production system, the ice storage tank of the heat storage system and the brine / cold water heat exchanger by a pump. ,
A hot water circulation path for circulating hot water by a pump between the cold / hot heat production system and the heat storage tank of the heat storage system,
A cold / hot heat supply device configured by a load / pipe route configured by a pipe that transports cold and hot heat to the load side and receives it again from the load side, a supply pump, and a pipe-related device, wherein the heat storage system includes an ice tank. , Ice and heat combined tank,
A cooling / heating heat supply device comprising a tank dedicated to heating and a pipe connecting them, wherein the ice / heating tank is operated as an ice storage tank in summer and as a heating storage tank in winter. 2. The brine path includes a cold / hot manufacturing system, a high-temperature header, a low-temperature header, and one or more brine cooling systems for sending brine from the high-temperature header to the low-temperature header via the cold / hot manufacturing system. A load pipe route from the low-temperature header to the high-temperature header via the brine / cold water heat exchanger; and one or more from the low-temperature header to the high-temperature header via the ice tank of the heat storage system. It has one or more summer cold piping routes from the low-temperature header to the high-temperature header via the ice / heat tank for the thermal storage system, and a pump for the brine cooling route and the load piping route. 2. The cooling / cooling system according to claim 1, wherein the cooling / heat storage piping route and the summer cooling / heating piping route do not have a pump.
Heat supply device. 3. A heat storage system including at least an ice heat storage tank and a hot heat storage tank, a cooling / cooling system for cooling brine and heating hot water.
A hot water production system, a brine / cold water heat exchanger for cooling cold water by brine, a cold water refrigerator for cooling return water from a cold water load, an ice storage tank of the cold / hot heat production system and the heat storage system, and a brine / cold water heat exchange. A brine path for circulating brine between the vessel and the
A hot water circulation path for circulating hot water by a pump between the heat production system and the heat storage tank of the heat storage system, a pipe for transporting cold and hot heat to the load side and receiving it again from the load side, and the supply pump and pipe related devices. A cold / hot heat supply device comprising a load-side piping path, wherein the heat storage system is constituted by a cold water dedicated tank, an ice / hot combined tank, a hot dedicated tank, and a pipe connecting these. The heat and heat tank operates as an ice heat storage tank in summer and as a heat heat storage tank in winter, and return water from the load passes through a dedicated chilled water tank and is pumped from the chilled water refrigerator to a brine / chilled water heat exchanger. A cold / hot heat supply device characterized by being sent to 4. The brine path includes a cold / hot heat production system, a high temperature header, a low temperature header, and one or more brine cooling systems for sending brine from the high temperature header to the low temperature header via the cold / heat production system. A load pipe route from the low-temperature header to the high-temperature header via a brine / cold water heat exchanger; and a low-temperature header from the low-temperature header to the high-temperature header via the ice / warming tank of the heat storage system. Having the above summer cooling and heating piping route,
The cooling / heating heat supply device according to claim 3, wherein the brine cooling passage and the load piping passage have a pump, and the summer cooling / heating piping passage has no pump. 5. A heat storage system including at least an ice heat storage tank and a hot heat storage tank, and a cooling / cooling system for cooling brine and heating hot water.
A hot water production system, a brine / cold water heat exchanger for cooling cold water with brine, a cold water refrigerator for cooling return water from a cold water load, between the cold / hot heat production system, an ice storage tank and a brine / cold water heat exchanger A brine route for circulating brine by a pump, a hot water circulation route for circulating hot water by a pump between the cold / hot heat production system and the heat storage tank of the heat storage system, transporting cold and hot heat to the load side, and again from the load side. A cold / hot heat supply device including a receiving pipe and a load-side pipe route including the supply pump and a pipe-related device, wherein the heat storage system includes a dedicated ice bath, a combined ice / heat bath,
The ice / heat / heat tank is operated as an ice heat storage tank in summer and as a hot water tank in winter, and the return water from the load is the cold water tank. A cold / hot heat supply device which is sent from a refrigerator to a brine / cold water heat exchanger. 6. The cooling system according to claim 1, wherein the brine path includes a cold / hot heat production system, a high-temperature header, a low-temperature header, and one or more brine cooling units for sending brine from the high-temperature header to the low-temperature header via the cold / heat production system. A load pipe route from the low-temperature header to the high-temperature header via the brine / cold water heat exchanger; and one or more from the low-temperature header to the high-temperature header via the ice tank of the heat storage system. A cooling heat storage dedicated piping route, having one or more summer cold cooling piping routes from the low-temperature header to the high-temperature header via the ice / heat tank for the heat storage system,
The cooling / heating heat supply device according to claim 5, wherein a pump is provided in the brine cooling path and the load piping path, and a pump is not provided in the cooling heat storage dedicated piping path and the summer cooling / heating piping path.