JPH0353539B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to waste heat utilization in a cooling system having a generator, absorber, condenser, evaporator and pump.

In conventional cooling systems, such as absorption refrigerators, a concentrated solution is pumped from an absorber to a generator. It is then heated in a generator to generate refrigerant vapor. The refrigerant vapor is sent to a condenser where it is cooled and liquefied. In doing so, the refrigerant vapor releases heat. The liquefied refrigerant is sent to the evaporator, where it absorbs heat and is vaporized before returning to the absorber. On the other hand, the dilute solution, which has released refrigerant vapor in the generator, is returned to the absorber and absorbs the refrigerant from the evaporator. At this time, absorbed heat is generated. In conventional cooling systems, the heat generated in the condenser and absorber is disposed of in a cooling tower or the like via water.

The present invention aims to provide an apparatus that can effectively utilize the heat generated in the above-mentioned condenser and absorber without discarding it in a cooling tower or the like.

Embodiments of the present invention will be described below with reference to the attached drawings, which use an absorption refrigeration cycle. FIG. 1 is a cycle diagram showing that heat generated in the absorber and condenser is applied to a concentrated solution sent from the absorber to the generator to preheat it. The absorber 1 is filled with a solution consisting of a refrigerant (eg, Freon 22, etc.) and a solvent (eg, dimethylformamide, etc.).

The solution passes through line 2 and is pumped to generator 1 by pump 3.
1, where it is heated and generates refrigerant vapor. The refrigerant vapor is condensed in a condenser 14, passes through a pipe 15 and a throttle valve 16, takes heat from the surroundings in an evaporator 17, is vaporized, and returns to the absorber. On the other hand, the solution from which the refrigerant vapor has been released in the generator 11 returns to the absorber 1 through the pipe 18 and the throttle valve 4. Here, in the absorber 1, an exothermic reaction occurs when the solution absorbs the refrigerant. Therefore, it is necessary to cool the absorber 1. Furthermore, in order to condense the refrigerant in the condenser 14, it is necessary to cool the condenser 14. Note that water will be used for cooling here. To cool the absorber 1 , the cooling water passes through the pipe 5 , cools the absorber 1 by a first heat exchanger 25 provided in the absorber 1 , passes through the pipe 12 , and flows into the pipe 10 . In addition, in cooling the condenser 14, the cooling water passes through the pipe 9 and cools the condenser 14 by a second heat exchanger 26 provided in the condenser 14.
It passes through conduit 13 and flows into conduit 10. The cooling water passing through the pipe 10 exchanges heat with the concentrated solution passing through the pipe 2 in the third heat exchanger 7, radiates heat in the pipe 6 and the cooling tower 8, passes through the pump 19, and flows to the pipes 5 and 9. . Here, the cooling water passing through the pipe line 10 is heated by the absorber 1 and the condenser 14, and the heat exchanger 25 and
26, the temperature is higher than that of the concentrated solution passing through the pipe 2. Therefore, the concentrated solution is
It is preheated in a third heat exchanger 7 before entering the air.

Figure 2 shows when the air conditioner and water heater are used together.
It is a system diagram for using the heat generated by the absorber/condenser to heat hot water. Similar to Figure 1,
Cooling water from the absorber 1 and condenser 14 is heat exchanged with hot water in a hot water storage tank 20 containing a third heat exchanger. If the hot water has not reached a predetermined temperature, it is heated by an auxiliary heater 22 and discharged through a valve 23. Hot water that is not tapped is returned to the hot water storage tank 20 through a hot water supply pipe 21. 24 is a valve. Incidentally, numerals 1 to 19 are the same as those in FIG. 1, and their operations are the same, so their explanation will be omitted.

As described above, the present invention enables the refrigerant entering the generator to be preheated or cooled by the third heat exchanger installed between the cooling water circuit and the pipe connecting the absorber and generator in the absorption heat pump cycle. The third heat exchanger provided between the water circuit and the hot water supply pipe is characterized in that the hot water supply water is preheated using waste heat that was conventionally discarded in a cooling tower or the like. This allows effective use of heat, reduces the capacity of the cooling tower and generator, and reduces the amount of auxiliary heat sources used.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of a cooling device according to an embodiment of the present invention;
FIG. 2 is an explanatory diagram of a cooling device according to a different embodiment of the present invention. 1...Absorber, 3,19...Pump, 4,16
... Throttle valve, 7 ... Third heat exchanger, 8 ... Cooling tower, 11 ... Generator, 14 ... Condenser, 17 ...
Evaporator, 20...Hot water storage tank incorporating third heat exchanger, 21...Hot water supply pipe, 22...Auxiliary heater, 23, 24...Valve, 25...First heat exchanger , 26... second heat exchanger.

Claims (1)

[Claims] 1. Generator, absorber, condenser, evaporator, pump,
and an absorption refrigerator comprising a first heat exchanger provided in the absorber and a second heat exchanger provided in the condenser, both heat exchangers, a circulation pump,
A cooling device comprising a cooling water circuit including a cooling tower, a pipe line connecting the absorber and the generator, and a third heat exchanger provided between the cooling water circuit. 2. The air conditioner according to claim 1, comprising a third heat exchanger provided between the cooling water circuit and the hot water supply pipe.