JPH02213663A - Absorption type gas cooling and heating system - Google Patents

Abstract

PURPOSE:To perform a simultaneous different cooling and heating operation by a method wherein an absorption type gas cooling or heating water device having two sets of cold water or hot water circulation pipes and a plurality of water-air heat exchangers are provided, and another set of units is enabled to operate while one set of units is being operated for a cooling operation. CONSTITUTION:A water-air heat exchanger FC and a water-air heat exchanger WX for an indoor air conditioner AC or the like are connected to a cold water or hot water circulation pipe system of an absorption type gas cold or hot water machine HS. During a cooling operation, refrigerant 1 of water is evaporated within a vacuum container 2 pressure reduced to remove a gasification heat from a cold or hot water coil 3 and to cool water in the cold or hot water coil 3. The evaporated water is absorbed by the dripped absorption liquid 4. The absorptive liquid 4 is sent to a regenerator 7, heated by a gas combustion unit 8, discharges the refrigerant vapor 1a and becomes a high concentration. Water supplied for the cold or hot water return pipe CHR is cooled by the cold or hot water coil 3 and sent to the cold or hot water pipe CH. In case of performing the heating operation in simultaneous with the cooling operation, a valve V3 is opened and a part of the refrigerant steam 1a from the regenerator 7 is sent to a hot water heater 11 so as to heat water in the hot water coil 12. In case of performing only the heating operation, the valve V4 is opened and the refrigerant vapor 1a is sent to the evaporator 5 so as to heat water in the cold or hot water coil 3.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an absorption type gas heating and cooling system, and in particular to a single system that provides different heating and cooling effects for spaces with different heating and cooling conditions within a building, such as the so-called interior or room space and the so-called perimeter or side wall space. This invention relates to an absorption gas heating and cooling system that can be operated simultaneously by a heat source machine.

In recent years, as working environments such as offices and living environments have become more sophisticated, it has become necessary to provide different types of heating and cooling for the side wall spaces and internal spaces of buildings. Particularly in cases where office automation equipment or other heat generating devices are placed indoors, there often arises a situation in which cooling is required indoors when the side wall space is being heated in winter.

Figure 6 shows an example in which separate heating and cooling heat source equipment (hereinafter referred to as heat source equipment) is provided for the peripheral wall and the interior of the room in order to meet this need. Cold heat pump・
A package PAC is installed, and an air-cooled heat pump/chiller PC is installed on the peripheral wall to supply cold and hot water to a water-air heat exchanger FC' such as a fan coil unit 7 placed along the wall. 0 in the figure indicates the outdoor unit installed at 31.1:RF corresponding to each air-cooled heat pump package PAC.

There are various other systems that separately cool and heat the interior of a room and the surrounding walls, but there is no system that uses a single heat source to cool and heat different parts of a building at the same time.

In the conventional heating and cooling system shown in FIG. 6, which has separate heat sources for the inside of the room and the surrounding wall, multiple heat sources are required even for the same floor, which is uneconomical.

Furthermore, if cooling and heating are required at the same time in the room interior and the surrounding wall, if this is done using separate heat sources, it is difficult to recover the heat by, for example, radiating the heat absorbed in the cooling part in the heating part. It is difficult to save energy without losing energy.

Furthermore, when using a single heat source device that supplies heat to multiple floors or a wide area of a building, such as the air-cooled heat pump/chiller HPC shown in Figure 6, even if only a small portion of the building is heated or cooled. It is necessary to drive the air-cooled heat pump/chiller NPC even when the engine is running, which not only takes time to start but also wastes energy.

Accordingly, an object of the present invention is to provide an absorption gas heating and cooling system using a single heat source machine that can perform different heating and cooling operations simultaneously.

Referring to the embodiment shown in FIG.
and cold and hot water return pipe CHR, hot water pipe H and hot water return pipe H
an absorption type gas chiller/heater H5 having a set R; and - a plurality of water-air heat exchangers FC and WX connected to the cold/hot water circulation pipe system, one set WX in the two sets of cold/hot water circulation systems; A configuration is used that allows another set of FCs to perform heating operation during cooling operation.

January First, the function of the absorption type gas chiller/heater HS as a heating/cooling heat source device will be explained using the example shown in FIG. In the illustrated example, during cooling operation, the refrigerant 1, which is water, evaporates in the vacuum container 2 whose pressure is reduced, and takes away the heat of vaporization from the hot and cold water coil 3 provided in the vacuum container 2. When the inside of the vacuum container 2 is in a vacuum state of 8.5 mmHH, water evaporates at 5° C., and the water in the hot and cold water coil 3 is cooled by absorbing the latent heat of evaporation. The evaporated water in the gas phase is absorbed by the absorption liquid 4 dropped into the vacuum container 2. The absorption liquid 4, which is preferably an aqueous lithium bromide solution, is dropped into the vacuum container z as a highly concentrated aqueous solution, absorbs water vapor, and becomes low in concentration. The vacuum vessel 2 which functions as described above has an evaporator 5 and an absorber 6.

The absorption liquid 4, which has become low in concentration, is sent to the regenerator 7 by the absorption liquid pump AP, heated by the gas combustor 8, releases refrigerant vapor 1a, and becomes high in concentration again. The highly concentrated absorption liquid 4 is dropped into the absorber 6 of the vacuum container 2 and absorbs the gas phase refrigerant 1 in the above manner.

Refrigerant vapor 1a released from absorption liquid 4 in regenerator 7
The water moves to the condenser 9, where it is cooled by the cooling water coil 10 and condensed into a liquid phase, in which case it becomes liquid water. The refrigerant 1 condensed into a liquid phase is dripped into the evaporator 5 of the vacuum container 2 and evaporated in the manner described above to cool the water in the cold/hot water coil 3 and then absorbed into the absorption liquid 4.

In this way, the cold and hot water return pipe C connected to the cold and hot water coil 3
The water supplied to the HR is cooled by the cold/hot water coil 3 and then sent to the cold/hot wood pipe CH.

In addition, when heating is required at the same time as cooling, the valve v3 corresponding to the presence or absence of heating load is opened, and a part of the refrigerant vapor 1a from the regenerator 7 is transferred to the water heater 11, and the hot water coil 12 is transferred to the water heater 11.
By heating the water inside, it radiates heat and condenses, liquid phase refrigerant
It is sent to condenser 9 as The liquid phase refrigerant l that has not reached the condenser 9 is dripped into the evaporator 5 of the vacuum vessel 2 in the manner described above.

Therefore, water supplied to the hot water return pipe HR connected to the hot water coil 12 is heated by the hot water coil 12 and then sent to the hot water pipe H.

Next, in the case of only heating operation, open the cooling/heating switching valve v4 and direct the refrigerant vapor 1a generated in the regenerator 7 to the evaporator 5.
The water in the cold and hot water coil is heated by condensing it on the surface of the cold and hot water coil 3, and the produced hot water is sent to the cold and hot wood pipe CH.

As is clear from the above description, the absorption type gas chiller/heater Is shown in FIGS. 1 and 5 functions as a heat source device having two sets of cold/hot water circulation pipe systems. However, the configurations of the absorption type gas chiller/heater H9 and the chilled/hot water circulation pipe system in the present invention are not limited to the above illustrated example.

According to the present invention, the water-air heat exchanger FC such as the fan coil unit on the peripheral wall and the water-air heat exchanger WX of the indoor air conditioner AC are connected to the cold/hot water circulation pipe system of the absorption type gas chiller/heater HS. connected to. In the illustrated example, the water-air heat exchangers FC and WX are all connected to the cold and hot water circulation pipe systems CH and CHR, and the water-air heat exchanger FC on the peripheral wall is further connected to the hot water circulation pipe systems H and HR in a freely switchable manner by valves v1 and v2. is also connected to.

Normally, both the surrounding wall section and the interior sections of the room are cooled or heated simultaneously using heat from the cold and hot water circulation pipe systems CH and CHR.

However, for example, during heating operation in winter, if cooling is required only indoors due to heat generation from indoor equipment or other reasons, the heat source equipment is temporarily stopped, cooling operation is performed, and valve V3 ( 5), the water heater 11 produces hot water, the cold and hot water circulation pipe system CH, C) IR is used as the cold water system, and the valve V1
．． All the water-air heat exchangers FC on the peripheral wall may be connected to the hot water circulation pipe system H, )IR by V2 (FIG. 1).

In this way, the objective of the present invention, which is to provide an absorption type gas heating and cooling system with a single heat source machine, which can perform different heating and cooling operations simultaneously, is achieved.

Li] In the embodiment shown in FIG. 1, a steam generator (not shown) is provided in the absorption type gas chiller/heater H8, and the steam is supplied to the humidifier HU of the indoor air conditioner AC. Valve VM is a valve that controls the supply of this steam. Note that the absorption type gas chiller/heater H5 in the illustrated example has a double supply/exhaust duct OA communicating with the outside air. The air conditioned by the indoor air conditioner AC is sent to the air duct DC and the indoor blower 1? It is sent into the room via B.

In the illustrated example, there is also a thermometer TH and a hygrometer HUt inside the room.
- and connect its measured value output to the control unit C0NT. The control unit C0NT controls a three-way valve TR1 for controlling the amount of heat of the water-air heat exchanger WX, a valve VM for steam control, and a cold/hot wood pipe valve v1 based on the measured temperature and humidity.
, V2. V3. Generate the 11B signal for V4 and apply that signal to those valves. In this way, air conditioning can be automatically controlled.

FIG. 2 shows an example in which the heating and cooling system shown in FIG. 1 is arranged on each floor of a building. In this example, absorption type gas chiller/heater 1 (S
is integrated with the indoor air conditioner AC, and the cooling tower R is placed on the rooftop RF. According to the air-conditioning system of the present invention for each floor, the surrounding wall water-air heat exchanger FC such as a fan coil fist unit can be operated individually for each floor. There is no need to drive the heat pump/chiller RPC for all floors due to partial air conditioning.

Moreover, different air conditioning operations can be performed between the peripheral wall portion and the interior of the room, as required.

Figures 3 and 4 show an example system J1 in which an absorption type gas chiller/heater H9 is integrated with a cooling tower R and placed on the rooftop RF.
The configuration and equipment layout are shown respectively. In this embodiment, the building floor area used for air conditioning equipment can be reduced, but the number of piping between the rooftop and each floor increases.

As explained in detail above, the absorption type gas cooling/heating system according to the present invention includes an absorption type gas chiller/heater having two sets of cold/hot water circulation pipe systems, and a plurality of absorption type gas chiller/heaters having two sets of cold/hot water circulation pipe systems. The use of a configuration that includes a water-air heat exchanger and allows one set of the two sets of cold/hot water circulation systems to perform a heating operation while the other set is in a heating operation provides the following effects.

(a) A single heat source device can cool and heat the surrounding walls and the interior of a building. Furthermore, if necessary, a humidity control function can be easily added to achieve the required air conditioning.

(b) When heating the surrounding wall and it becomes necessary to cool the room to deal with heat generation inside the room, the room can be cooled at the same time as heating the surrounding wall, and the absorption type gas-cooled/hot water can be used. Heat generated during cooling operation in the machine HS can be recovered and applied to the peripheral wall as heating heat.

(c) It is possible to efficiently cool, heat, or air condition only the required locations inside the building.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the configuration of an absorption gas heating and cooling system according to the present invention, FIG. 2 is an explanatory diagram showing an example of equipment arrangement,
Figures 3 and 4 are explanatory diagrams showing the configuration and equipment arrangement of other embodiments, respectively. Figure 5 is an explanatory diagram of an absorption type gas chiller/heater. Figure 6 is an explanatory diagram of a conventional heating and cooling system. . DESCRIPTION OF SYMBOLS 1... Refrigerant, 1a... Refrigerant vapor, 2... Vacuum container, 3... Cold/hot water coil, 4... Absorption liquid,
5... Evaporator, 6... Absorber, 7... Regenerator, 9... Condenser, 10... Cooling water coil, 11... Water heater, 12... Hot water coil,
AC...Indoor air conditioner, AP...Absorption liquid pump, C...Cold water pipe, CH...Cold/hot water pipe, CH
R...Cold/hot water return pipe, C0NT...Control unit, OR...Cold water return pipe, GW...Cooling water pipe,
CWR...Cooling water return pipe, DA...Double supply/exhaust duct, DC...Air duct h, FC, WX・
...Water air heat exchanger, H...Hot water pipe, HM...Humidifier, HPC...Heat pump fist chiller, HR...Hot water return pipe, H3...Absorption type gas chiller/heater, Hυ・
...Hygrometer, PAC...Heat pump skewer package,
R...Cooling tower, RB...Indoor blower, RF・
...Rooftop, S...Steam pipe, ↑H...Thermometer,
Ding R...three-way valve, VM, vl. V2, v3, V 4 ... valves. Figure 5

Claims (2)

[Claims] (1) An absorption type gas chiller/heater having two sets of cold/hot water circulation pipe systems, and a plurality of water/air heat exchangers connected to the cold/hot water circulation pipe system, one set of the above two sets of cold/hot water circulation systems. This is an absorption gas heating and cooling system that allows one set to be heated while the other set is being cooled. (2) The absorption type gas air conditioning/heating system according to claim 1, wherein the absorption type gas chiller/heater exchanges heat between the two sets of cold/hot water circulation pipe systems.