JPH065148B2 - Heat pump - Google Patents

Description

TECHNICAL FIELD The present invention relates to a heat pump including a heating tower that collects heat from the atmosphere.

[Conventional technology]

In a heat pump with a heating tower that collects heat from the atmosphere, when the heat is collected, the brine may be absorbed by the moisture in the atmosphere and the brine may be diluted, but conventionally, a concentrator that has a heating source for electricity or steam outside the heat pump system. Was attached or the operation of the heat pump was interrupted, and only the heating tower was independently operated for concentration to deal with the problem.

[Problems to be solved by the invention]

Therefore, it has been a problem that precious energy is consumed for concentrating the brine or the operation of the heat pump has to be interrupted.

The present invention is intended to solve the above-mentioned conventional problems, and an object thereof is to provide an energy-saving heat pump.

[Means for solving problems]

A first aspect of the present invention includes, as a means for solving the above-mentioned problems, a brine heat collection path that gives heat obtained from the atmosphere in a heating tower to a refrigerant in an evaporator, and the brine is obtained from brine in the evaporator. A heat pump configured to give hot water to hot water in a condenser,
In a heat pump equipped with a compressor driven by a heat engine, which is operated when hot water is taken out from the condenser, a brine concentrator for heating and condensing the brine is provided in the brine heat collection path, and the brine is heated by the condenser. A second aspect of the present invention is to provide a heat pump characterized in that a heating path for heating hot water with exhaust heat of the heat engine to guide it to the brine concentrating device as a heating source for brine concentration is provided. In addition to the requirements of the first aspect of the invention, a heat pump provided with a switching mechanism for returning hot water heated by the heat engine to the outlet side of the condenser when the brine concentration is not necessary is provided in the heating path.

[Action]

According to the first aspect of the present invention, by having the above-described configuration, it is necessary to concentrate the brine during hot water production as in the case where the brine absorbs water in the heating tower and is diluted to a predetermined concentration or less. In this case, the brine is guided to the concentrator, and the hot water heated by the condenser is heated by the heat engine to be guided to the concentrator, and the brine is heated by the heat of the hot water to concentrate the brine to a predetermined concentration. be able to.

Since the second aspect of the invention has the above-described configuration, in addition to the operation of the first aspect of the present invention when concentrating the brine, the exhaust heat of the heat engine can be used for heating the hot water when the concentration of the brine is unnecessary.

〔Example〕

 Embodiments of the present invention will be described with reference to the drawings.

The evaporator 1, the low-pressure stage compressor 2, the low-pressure stage condenser 3, the high-pressure stage compressor 4 and the high-pressure stage condenser 5 are connected by a refrigerant path, and a hot water production cycle is performed using all devices to evaporate. A cold water production cycle is performed using the vessel 1, the compressor 2 and the condenser 3.

In the heat transfer tube of the evaporator 1, a brine heat collection path 7 having a heating tower 6 and a cold water path 8 are provided with valves 9, 10, 1
1, 12 are switchably connected, and the heat transfer tube of the condenser 3 is
It is connected to the brine heat collection path 7 via valves 13 and 14.

The compressor 2 includes an electric motor as a drive source, while the compressor 4 includes a heat engine such as the gas engine 15 as a drive source.

A brine concentrator 19 is provided in the brine heat collection path 7. The brine concentrating device 19 is provided in a brine concentrating route 18 that is connected to the outlet side of the heating tower 6 so as to be connectable with valves 16 and 17, and the brine after being heated by the atmosphere in the heating tower 6 is removed. Although the heating and concentration are performed, the brine concentration device 19 may be arranged in parallel with the heating tower 6. The brine concentrator 19 collects the engine 15 by cooling the engine, lubricating oil, exhaust gas, and so on.
Exhaust heat of is introduced into the heating path 20 as a heating source for heating and concentration.

When introducing the exhaust heat, engine cooling water or exhaust gas can be directly introduced, but in the present embodiment, the hot water produced by the condenser 5 is used as a medium. That is, on the hot water outlet side of the hot water passage 21 connected to the heat transfer pipe of the condenser 5, the engine 15, the heat exchanger 23 provided in the exhaust gas passage 22 of the engine 15, the brine concentrator 19, and the hot water outlet side again. The return path is the heating path 20 and the valve 2
It is connected via 4, 25.

The heating passage 20 is provided with a bypass passage 26 that bypasses the brine concentrator 19.
The hot water heating path passing through 6 and not passing through the brine concentrating device 19 and the heating path 20 passing through the brine concentrating device 19 can be switched by valves 27, 28 and 29 as a switching mechanism.

When producing hot water, the heat pump cycle is performed using all the equipment.

That is, the valves 9 and 10 are opened and the valves 11, 12, 13, and 14 are closed, and the brine is circulated between the evaporator 1 and the heating tower 6. Brine is heating tower 6
The heat obtained from the atmosphere is given to the refrigerant in the evaporator 1, the refrigerant is heated to a high temperature in the compressors 2 and 4 with the heat obtained in the evaporator 1, and the heat is given to the hot water in the condenser 5. Hot water is taken out from the condenser 5.

When the brine is concentrated to a predetermined concentration or below by a densitometer or intermittently by a timer, when the brine is concentrated, the valve 16 is opened, the valve 17 is closed, and a part of the brine is concentrated in the brine concentration device. The valve 16 is closed after the predetermined amount is stored. And valves 24, 25, 27, 28
Is opened and the valve 29 is closed to bypass a part of the hot water in the hot water path 21 through the heating path 20 and guide the hot water further heated by the exhaust heat of the engine 15 to the brine concentrator 19 to heat the heating tower 6 The brine, which has obtained heat from the atmosphere at, is further heated and concentrated. Then, after concentration to a predetermined concentration is detected by a densitometer or level meter, or after a lapse of a predetermined time by a timer, the valve 17 is opened to return the concentrated brine to the brine heat collection path 7.

In cases other than when the brine is concentrated, that is, the brine concentrator 19
If it is not necessary to guide the exhaust heat of the engine 15 to the valve 24,
25, 29 are opened, valves 27, 28 are closed, and hot water path 21
It is possible to introduce a part of the hot water of the above into a hot water heating path that bypasses the engine 15 and the heat exchanger 23, and use the exhaust heat of the engine 15 to further raise the temperature of the hot water.

When producing cold water, the evaporator 1, the compressor 2 and the condenser 3 are used, the valves 11, 12, 13, 14 are opened and the valves 9, 10 are used.
Is closed and the heat transfer tube of the evaporator 1 is connected to the cold water path 8,
The brine is circulated between the condenser 3 and the heating tower 6. At this time, the heating tower 6 is connected to the condenser 3
The cooling water is taken out from the evaporator 1 by acting as a cooling tower for radiating the brine that has obtained heat from the refrigerant.

In the above embodiments, the compressor 4 was driven by the heat engine, but at least one of the compressors driven when producing hot water was driven by the heat engine, and the exhaust heat of the heat engine was used for brine heating concentration. It may be used as a heating source. For example, the compressor 2 described above is driven by a heat engine, and the exhaust heat of the heat engine is used by the brine concentrator 1
It is also possible to lead to 9 as a heating source. In that case, it is possible to deal with the need to concentrate brine for some reason when producing cold water, but in order to effectively use the exhaust heat of the heat engine when concentration is unnecessary, for example, the exhaust heat is used for hot water production. Utilization is considered.

〔The invention's effect〕

According to the present invention, it is possible to provide a heat pump capable of concentrating brine in an energy-saving manner, and it is possible to exert a remarkable effect in practical use.

[Brief description of drawings]

The drawings are flow diagrams of embodiments of the invention. 1 ... Evaporator, 2 ... Compressor, 3 ... Condenser, 4 ... Compressor, 5
... condenser, 6 ... heating tower, 7 ... brine heat collection path, 8 ... cold water path, 9 ... valve, 10 ... valve, 11 ... valve, 1
2 ... valve, 13 ... valve, 14 ... valve, 15 ... engine, 16 ...
Valve, 17 ... Valve, 18 ... Brine concentration path, 19 ... Brine concentration device, 20 ... Heating path, 21 ... Hot water path, 22 ...
Exhaust gas path, 23 ... Heat exchanger, 24 ... Valve, 25 ... Valve, 2
6 ... Bypass passage (switching mechanism), 27 ... Valve, 28 ... Valve,
29 ... Valve (switching mechanism).

Claims (2)

[Claims] 1. A heating tower 6 is provided with a brine heat collecting path 7 for giving heat obtained from the atmosphere to a refrigerant in an evaporator 1, so that heat obtained from brine in the evaporator 1 is given to hot water in a condenser 5. A heat pump having a compressor 4 driven by a heat engine 15 that is operated when hot water is taken out from the condenser 5, and a brine concentrating device that heats and concentrates brine in the brine heat collecting path 7. 19 is provided, and a heating path 20 for heating the hot water heated in the condenser 5 by the exhaust heat of the heat engine 15 and guiding it to the brine concentrator 19 as a heating source for brine concentration is characterized. And a heat pump. 2. The heating tower 6 is provided with a brine heat collecting path 7 for giving heat obtained from the atmosphere to the refrigerant in the evaporator 1, so that the heat obtained from brine in the evaporator 1 is given to hot water in the condenser 5. A heat pump having a compressor 4 driven by a heat engine 15 that is operated when hot water is taken out from the condenser 5, and a brine concentrating device that heats and concentrates brine in the brine heat collecting path 7. 19 is provided, the hot water heated by the condenser 5 is heated by the exhaust heat of the heat engine 15, and the heating path 20 for guiding the hot water to the brine concentrator 19 as a heating source for brine concentration is provided and the heating is performed. Route 20
The heat pump device further comprises switching mechanisms 27, 28, 29 for returning the warm water heated by the exhaust heat of the heat engine 15 to the outlet side of the condenser 5 when the brine concentration is unnecessary.