CN102410675B - Over-cooling device and over-cooling method for evaporative condensation type refrigeration system - Google Patents
Over-cooling device and over-cooling method for evaporative condensation type refrigeration system Download PDFInfo
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 51
- 238000001816 cooling Methods 0.000 title claims abstract description 32
- 238000009833 condensation Methods 0.000 title claims abstract description 25
- 230000005494 condensation Effects 0.000 title claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 97
- 239000003507 refrigerant Substances 0.000 claims abstract description 74
- 238000000034 method Methods 0.000 claims abstract description 45
- 230000006835 compression Effects 0.000 claims abstract description 31
- 238000007906 compression Methods 0.000 claims abstract description 31
- 238000007791 dehumidification Methods 0.000 claims abstract description 31
- 238000010521 absorption reaction Methods 0.000 claims abstract description 6
- 238000004781 supercooling Methods 0.000 claims description 49
- 238000001704 evaporation Methods 0.000 claims description 47
- 230000008020 evaporation Effects 0.000 claims description 47
- 239000007788 liquid Substances 0.000 claims description 44
- 230000008569 process Effects 0.000 claims description 23
- 230000007704 transition Effects 0.000 claims description 7
- 239000007921 spray Substances 0.000 claims description 6
- 230000001502 supplementing effect Effects 0.000 claims description 6
- 238000004134 energy conservation Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000011069 regeneration method Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 238000009834 vaporization Methods 0.000 description 1
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- 239000002918 waste heat Substances 0.000 description 1
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Abstract
The invention relates to an over-cooling device and an over-cooling method for an evaporative condensation type refrigeration system. The device comprises a solution dehumidification evaporative cooling circulation loop and an evaporative condensation refrigerating circulation loop; the solution dehumidification evaporative cooling circulation loop generates cold water to provide over-cooling for a refrigerant behind a condenser in the evaporative condensation refrigerating circulation loop; the above two circulation loops are connected through an evaporative cooler (18); and the solution dehumidification evaporative cooling circulation loop comprises a solution circulation loop and an air circulation loop. The method comprises three procedures of solution circulation, air circulation, and vapor compression refrigeration circulation, wherein the solution circulation procedure adopts a strong solution in a dehumidifier (6) to absorb water vapor in the air, so as to maintain the moisture absorption capacity of the air entering the evaporative cooler (18), and the concentration of the solution is lowered after absorbing moisture. The invention can stably and reliably improve refrigeration coefficient and is feasible.
Description
Technical Field
The invention relates to a device and a method for realizing refrigerant supercooling through dehumidification, evaporation and cooling, in particular to a high-efficiency evaporation condensation refrigerating device based on a dehumidification, evaporation and cooling supercooling method, and belongs to the technical field of solution dehumidification and vapor compression refrigeration performance improvement.
Background
With the emergence of the situation of energy shortage, the problem of energy consumption of an air conditioning system caused by the wide application of refrigeration air conditioning equipment causes general attention of the current society, energy conservation becomes an urgent requirement of the refrigeration field in a new situation, and national strategy for sustainable development is also provided in China.
Vapor compression refrigeration is widely applied in social life as a widely used refrigeration mode, so that the improvement of vapor compression refrigeration efficiency has important practical significance and application value, wherein the advantages of increasing refrigeration capacity, improving refrigeration efficiency and the like due to supercooling of refrigerant after a condenser are taken into consideration. The traditional refrigerant supercooling method has the defects of large heat transfer temperature difference, low refrigerant supercooling degree, high-grade energy consumption and the like, and the solution dehumidification evaporation cooling refrigerant supercooling method has considerable application prospect by the advantages of small heat transfer temperature difference, low-grade heat energy utilization, energy conservation, environmental protection and the like, so that the research and development of a novel efficient refrigerant supercooling method have important significance.
Disclosure of Invention
The technical problem is as follows:the invention provides a supercooling device for an evaporation condensation type refrigerating system, which can realize the purposes of stability, reliability, improvement of the refrigerating coefficient and easiness in implementation.
The technical scheme is as follows:in order to solve the above technical problems, the present invention provides a supercooling apparatus for an evaporation-condensation type refrigeration system,the device comprises a solution dehumidification evaporation cooling circulation loop and an evaporation condensation refrigeration circulation loop, wherein cold water generated by the solution dehumidification evaporation cooling circulation loop is used for providing supercooling for a refrigerant after a condenser in the evaporation condensation refrigeration circulation, and a connecting part of the two circulation loops is an evaporation cooler;
the solution dehumidification evaporation cooling circulation comprises a solution circulation loop and an air circulation loop; wherein,
the solution circulation loop comprises a dehumidifier, a dilute liquid storage tank, a dilute solution pump, a liquid-liquid heat exchanger, a solar heat collector, a regenerator, a second fan, a concentrated liquid storage tank, a concentrated solution pump, a first solution throttling valve, a second solution throttling valve, an auxiliary heater and a solution cooler;
the lower part output of dehumidifier is connected with thin reservoir input, and the output of thin reservoir is divided into two routes through the dilute solution pump:
one path is connected with the right input end of the liquid-liquid heat exchanger;
the other path is connected with the input end of the solution cooler through a first solution throttling valve;
the left output end of the liquid-liquid heat exchanger is divided into two paths:
one path is connected with the input end of a solar heat collector, and the output end of the solar heat collector is connected with the input end of the upper part of the regenerator;
the other path is connected with the input end of an auxiliary heater through a second solution throttle valve, and the output end of the auxiliary heater is connected with the input end of the upper part of the regenerator;
the lower output end of the regenerator is connected with the input end of the concentrated liquid storage tank, the output end of the concentrated liquid storage tank is connected with the lower input end of the liquid-liquid heat exchanger through a concentrated solution pump, the upper output end of the liquid-liquid heat exchanger is connected with the input end of the solution cooler, and the output end of the solution cooler is connected with the upper part of the dehumidifier;
the air circulation loop comprises an air precooler, a heat regenerator, a first fan, an evaporative cooler, an exhaust valve, an air supply valve, a water supply valve, a refrigerant water pump, a water supplementing device and an air throttle valve;
the upper portion output terminal of dehumidifier connects the input of air precooler, and the output terminal of air precooler connects the upside input of regenerator, and the downside output of regenerator connects the downside input of evaporative cooler through first fan, and the upside output terminal of evaporative cooler connects the right side input of regenerator, and the left side output of regenerator divides two the tunnel:
one path is connected with the lower input end of the dehumidifier through an air throttle valve;
the other path is communicated with the environment through an exhaust valve; the air supply valve is connected with the lower part of the dehumidifier; the output end of the water replenishing device is connected with the lower output end of the evaporative cooler through a water feeding valve, and the lower output end of the evaporative cooler is connected with the upper part of the evaporative cooler through a refrigerant water pump;
the vapor compression refrigeration cycle loop comprises an evaporator, a compressor, a condenser, a refrigerant supercooling section in the evaporative cooler and a throttle valve;
the output end of the evaporator is connected with the input end of the compressor, the output end of the compressor is connected with the input end of the condenser, the output end of the condenser is connected with the input end of the refrigerant supercooling section, and the output end of the refrigerant supercooling section is connected with the input end of the evaporator through a throttle valve; the exhaust of the condenser is connected with the lower part of the regenerator.
Preferably, in the evaporative cooler, the refrigerant water area at the lower part of the evaporative cooler is connected with a sprayer positioned at the upper part of the evaporative cooler through a refrigerant water pump, and a refrigerant supercooling section is arranged at the lower part of the sprayer.
The invention also provides a supercooling method for the evaporative condensation type refrigeration system, which comprises three processes of solution circulation, air circulation and vapor compression refrigeration circulation;
in the solution circulation process, concentrated solution is adopted to absorb water vapor in air in the dehumidifier so as to maintain the moisture absorption capacity of the air entering the evaporative cooler, the diluted concentration of the solution is reduced after the solution absorbs moisture, the diluted solution enters the regenerator through a diluted solution pump to be heated and regenerated, the concentration is improved, and the capacity of absorbing water vapor is recovered again;
the air circulation process is that the partial pressure of water vapor in the dehumidified air is low, the water vapor evaporated by spray water is continuously absorbed in the evaporation cooler, the water is evaporated and vaporized to absorb the heat of the air and the water, in the vapor compression refrigeration circulation process, the refrigerant enters a refrigerant supercooling section in the evaporation cooler through a throttle valve, an evaporator, a compressor and a condenser, and the low-temperature water and the air in the evaporation cooler are continuously evaporated to absorb the heat of the refrigerant, so that the refrigerant is cooled until being supercooled.
Preferably, in the air circulation process, the humidified air adopts two air circulation modes: in summer, the humidity of the outside air is high in humid and hot climate, a closed air circulation mode is adopted, the air humidified in the evaporative cooler passes through the liquid-liquid heat exchanger and is sent to the dehumidifier, and the dehumidified air enters the evaporative cooler through the air precooler, the heat regenerator and the first fan;
in transition seasons, the moisture content of outside air is low, a fresh air circulation mode is adopted, fresh air enters a dehumidifier through an air supply valve, the dehumidified air enters an evaporative cooler through an air precooler, a heat regenerator and a first fan, and the dehumidified air is discharged through an exhaust valve after the heat regenerator releases cold energy; along with the continuous reduction of circulating water in the evaporative cooler, a water replenishing device is additionally arranged at the lower part of the evaporative cooler.
Has the advantages that:
1. the method can utilize heat sources such as condensation heat of a condenser, industrial waste heat, solar energy and the like as driving energy sources of the solution regenerator, and realizes effective utilization of waste heat or renewable energy sources.
2. The device can be formed by combining and transforming a solution dehumidification evaporative cooling system and a vapor compression refrigeration system, and the refrigeration system has large supercooling degree, high efficiency, energy conservation and stable and reliable operation.
3. The method and the device provide a feasible method and a feasible scheme for supercooling the refrigerant of the vapor compression refrigeration cycle, and can be realized only by modifying and upgrading a vapor compression refrigeration device and a solution dehumidification evaporative cooling device which have mature technologies.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Among them are: the system comprises an evaporator 1, a compressor 2, a condenser 3, a refrigerant supercooling section 4, a throttle valve 5, a dehumidifier 6, a dilute liquid storage tank 7, a dilute solution pump 8, a liquid-liquid heat exchanger 9, a solar heat collector 10, a regenerator 11, a concentrated liquid storage tank 12, a concentrated solution pump 13, a solution cooler 14, an air precooler 15, a heat regenerator 16, a first fan 17, an evaporative cooler 18, an exhaust valve 19, an air supply valve 20, a water supply valve 21, a refrigerant water pump 22, a second fan 23, a water supplementing device 24, a first solution throttle valve 25, a second solution throttle valve 26, an auxiliary heater 27 and an air throttle valve 28.
Detailed Description
The invention will now be described with reference to the accompanying drawings.
Referring to fig. 1, the supercooling apparatus for an evaporation-condensation type refrigeration system according to the present invention includes a solution dehumidification evaporation-cooling circulation loop and an evaporation-condensation refrigeration circulation loop, the solution dehumidification evaporation-cooling circulation loop generates cold water to provide supercooling for a refrigerant after a condenser in the evaporation-condensation refrigeration circulation, and a connection part of the above two circulation loops is an evaporation cooler 18.
The solution dehumidification evaporation cooling circulation comprises a solution circulation loop and an air circulation loop; wherein,
the solution circulation loop comprises a dehumidifier 6, a dilute liquid storage tank 7, a dilute solution pump 8, a liquid-liquid heat exchanger 9, a solar heat collector 10, a regenerator 11, a second fan 23, a concentrated liquid storage tank 12, a concentrated solution pump 13, a first solution throttle valve 25, a second solution throttle valve 26, an auxiliary heater 27 and a solution cooler 14.
The lower part output of dehumidifier 6 is connected with diluted reservoir 7 input, and diluted reservoir 7's output is divided into two routes through diluted solution pump 8:
one path is connected with the right input end of the liquid-liquid heat exchanger 9;
the other path is connected with the input end of the solution cooler 14 through a first solution throttle valve 25;
the left output end of the liquid-liquid heat exchanger 9 is divided into two paths:
one path is connected with the input end of the solar heat collector 10, and the output end of the solar heat collector 10 is connected with the input end of the upper part of the regenerator 11.
The other path is connected with the input end of an auxiliary heater 27 through a second solution throttle valve 26, the output end of the auxiliary heater 27 is connected with the input end of the upper part of the regenerator 11, and a second fan 23 is connected with the lower part of the regenerator 11.
The lower output end of the regenerator 11 is connected with the input end of the concentrated liquid storage tank 12, the output end of the concentrated liquid storage tank 12 is connected with the lower input end of the liquid-liquid heat exchanger 9 through a concentrated solution pump 13, the upper output end of the liquid-liquid heat exchanger 9 is connected with the input end of a solution cooler 14, and the output end of the solution cooler 14 is connected to the upper part of the dehumidifier 6.
The air circulation loop comprises an air precooler 15, a heat regenerator 16, a first fan 17, an evaporative cooler 18, an exhaust valve 19, an air supply valve 20, a water supply valve 21, a refrigerant water pump 22, a water supplementing device 24 and an air throttle valve 28.
The upper portion output terminal of dehumidifier 6 connects the input of air precooler 15, and the output terminal of air precooler 15 connects the upside input of regenerator 16, and the downside output terminal of regenerator 16 connects the downside input of evaporative cooler 18 through first fan 17, and the upside output terminal of evaporative cooler 18 connects the right side input of regenerator 16, and the left side output terminal of regenerator 16 divides two tunnel:
one path is connected with the lower input end of the dehumidifier 6 through an air throttle valve 28;
the other path is communicated with the environment through an exhaust valve 19.
The blast valve 20 is connected with the lower part of the dehumidifier 6; the output end of the water replenishing device 24 is connected with the lower output end of the evaporative cooler 18 through a water feeding valve 21, and the lower output end of the evaporative cooler 18 is connected with the upper part of the evaporative cooler 18 through a refrigerant water pump 22.
The vapor compression refrigeration cycle comprises an evaporator 1, a compressor 2, a condenser 3, a refrigerant supercooling section 4 in an evaporative cooler 18 and a throttle valve 5.
The output end of the evaporator 1 is connected with the input end of the compressor 2, the output end of the compressor 2 is connected with the input end of the condenser 3, the output end of the condenser 3 is connected with the input end of the refrigerant supercooling section 4, and the output end of the refrigerant supercooling section 4 is connected with the input end of the evaporator 1 through the throttle valve 5; the exhaust air of the condenser 3 is connected to the lower part of the regenerator 11.
In the evaporative cooler 18, a refrigerant water region at the lower part of the evaporative cooler 18 is connected with a sprayer at the upper part of the evaporative cooler 18 through a refrigerant water pump 22, and a refrigerant supercooling section 4 is arranged at the lower part of the sprayer.
Two air circulation modes are used: closed air circulation mode for summer humid hot climate and fresh air circulation mode for transition seasons:
the closed air circulation mode is as follows: the exhaust valve 19 and the blast valve 20 are closed, and the air throttle valve 28 is opened. The internal air enters the dehumidifier 6 through the air throttle valve 28 for dehumidification, enters the evaporative cooler 18 through the air precooler 15 and the heat regenerator 16 under the action of the first fan 17 for evaporative cooling, and then enters the dehumidifier 6 again through the heat regenerator 16.
The fresh air circulation mode is as follows: opening the exhaust valve 19 and the blast valve 20, and closing the air throttle valve 28; the outside air enters the dehumidifier 6 through the air supply valve 20 for dehumidification, enters the evaporative cooler 18 through the air precooler 15 and the heat regenerator 16 under the action of the first fan 17 for evaporative cooling, passes through the heat regenerator 16 and is discharged through the exhaust valve 19.
The invention also provides a supercooling method for the evaporative condensation type refrigeration system, which comprises three processes of solution circulation, air circulation and vapor compression refrigeration circulation;
in the solution circulation process, the concentrated solution is adopted in the dehumidifier 6 to absorb the water vapor in the air so as to maintain the moisture absorption capacity of the air entering the evaporative cooler 18, the diluted concentration of the solution is reduced after the solution absorbs moisture, the diluted solution enters the regenerator 11 through a diluted solution pump to be heated and regenerated, the concentration is improved, and the capacity of absorbing the water vapor is recovered again;
the air circulation process is that the partial pressure of the water vapor in the dehumidified air is low, the water vapor evaporated by the spray water is continuously absorbed in the evaporative cooler 18, the water is evaporated and vaporized to absorb the heat of the air and the water,
in the process of vapor compression refrigeration cycle, refrigerant enters a refrigerant supercooling section in the evaporative cooler 18 through the throttle valve 5, the evaporator 1, the compressor 2 and the condenser 3, and low-temperature water and air in the evaporative cooler 18 are continuously evaporated to absorb heat of the refrigerant, so that the refrigerant is cooled until being supercooled.
In the air circulation process, the humidified air adopts two air circulation modes: in summer, the humidity of the outside air is high in humid and hot climate, a closed air circulation mode is adopted, the air humidified in the evaporative cooler 18 passes through, the liquid-liquid heat exchanger 9 is sent to the dehumidifier 6, and the dehumidified air enters the evaporative cooler 18 through the air precooler 15, the heat regenerator 16 and the first fan 17;
in the transition season, the moisture content of the outside air is low, a fresh air circulation mode is adopted, fresh air enters the dehumidifier through the air supply valve 20, the dehumidified air enters the evaporative cooler 18 through the air precooler 15, the heat regenerator 16 and the first fan 17, and the dehumidified air is discharged through the exhaust valve 19 after the cold energy is released by the heat regenerator 16; with the continuous decrease of the circulating water in the evaporative cooler, a water replenishing device 24 is additionally arranged at the lower part of the evaporative cooler 18.
The invention uses the cooling water generated by solution dehumidification evaporation cooling in the vapor compression refrigeration cycle to supercool the refrigerant leaving the condenser, thereby increasing the refrigerating capacity of the vapor compression refrigeration unit and improving the system refrigeration coefficient. The invention is composed of a solution dehumidification evaporation cooling cycle and a vapor compression type refrigeration cycle, the combination point of the two cycles is a subcooler behind a vapor compression type refrigeration cycle condenser, refrigerant enters the subcooler arranged in the solution dehumidification evaporation cooling cycle after passing through the vapor compression type refrigeration system condenser, and enters an evaporator for gasification refrigeration through a throttle valve, such as the conventional vapor compression type refrigeration cycle. The vapor compression type refrigeration cycle system adopts an air-cooled condenser, and air heated by the condenser is directly sent to a regenerator in the solution dehumidification evaporative cooling cycle to provide partial heat for the solution circulation regeneration process.
The refrigerant supercooling method of the high-efficiency evaporation condensation refrigerating device based on the dehumidification evaporation cooling supercooling method comprises three processes of solution circulation, air circulation and vapor compression refrigerating circulation. The specific scheme is as follows: the solution circulation is similar to the traditional solution dehumidification-regeneration circulation, a concentrated solution is adopted in a dehumidifier to absorb water vapor in air so as to maintain the moisture absorption capacity of the air entering an evaporative cooler, the diluted concentration of the solution is reduced after the solution absorbs moisture, the diluted solution enters a regenerator through a diluted solution pump to be heated and regenerated, the concentration is improved, and the capacity of absorbing water vapor is recovered again; the air cycle process is that the vapor partial pressure is low in the air after the dehumidification, constantly absorbs the vapor that the shower water evaporated in the evaporative cooler, and the heat of air and water is absorbed in the evaporation vaporization of water, and the air after the humidification adopts two kinds of air cycle modes: in summer, the humidity of the outside air is high in humid and hot climate, a closed air circulation mode is adopted, the air humidified in the evaporative cooler is sent to the dehumidifier through the heat exchanger, and the dehumidified air enters the evaporative cooler through the air precooler, the heat regenerator and the first fan. In transition seasons, the moisture content of outside air is low, a fresh air circulation mode is adopted, fresh air enters a dehumidifier through an air supply valve, the dehumidified air enters an evaporative cooler through an air precooler, a heat regenerator and a first fan, and the dehumidified air is discharged through an exhaust valve after the heat regenerator releases cold energy; along with the continuous reduction of circulating water in the evaporative cooler, a water replenishing device is additionally arranged at the lower part of the evaporative cooler. In the vapor compression refrigeration cycle, a refrigerant enters a refrigerant supercooling section in an evaporative cooler through a throttle valve, an evaporator, a compressor and a condenser, and low-temperature water and air in the evaporative cooler continuously evaporate and absorb the heat of the refrigerant, so that the refrigerant is cooled until the refrigerant is supercooled.
The invention utilizes solar energy, other low-grade heat sources and condenser condensation heat to drive the regenerator to regenerate water vapor, the water vapor is taken away by air and discharged, the concentration of the regenerated solution is improved, the solution passes through the liquid-liquid heat exchanger and the solution cooler and then is sprayed into the dehumidifier to absorb the water vapor from the evaporative cooler and the outside air, the heat released by the water vapor changed into liquid in the absorption process is taken away by cooling water, the concentration of the solution after dehumidification is reduced, and the solution enters the regenerator through the dilute solution pump, the liquid-liquid heat exchanger, the solar heat collector and the auxiliary heater to complete the regeneration process. Air from the dehumidifier after dehumidification enters into the evaporative cooler through an air precooler, a heat regenerator and a fan, water vapor evaporated by spray water is absorbed in the evaporative cooler, evaporation of the spray water is accelerated, the water evaporation absorbs heat of air and water, and the air after humidification adopts two air circulation modes: in summer, the humidity of the outside air is high in humid and hot climate, a closed air circulation mode is adopted, and the air humidified in the evaporative cooler is sent to the dehumidifier through the heat exchanger. In transition seasons, the moisture content of the outside air is low, a fresh air circulation mode is adopted, and the air humidified in the evaporative cooler is exhausted by the exhaust valve after passing through the heat regenerator. The vapor compression cycle process is that the refrigerant is throttled and depressurized by a throttle valve to enter an evaporator, then enters a refrigerant supercooling section in an evaporation cooler through a compressor and a condenser, spray water is continuously evaporated in the evaporation cooler to absorb the heat of the refrigerant, so that the refrigerant is supercooled, in order to prevent the moisture in the system from being continuously evaporated and then the moisture in the cycle is reduced, water is supplemented into the evaporation cooler by a water supplementing device at proper time to keep the water quantity in the system cycle, the refrigerant enters the throttle valve to form a vapor compression cycle after being supercooled in the evaporation cooler, and the condensation heat of the condenser is brought into a regenerator by air through a fan.
The technical scheme of the invention is that the traditional vapor compression refrigeration cycle and the solution dehumidification evaporation cooling cycle are combined, and the combination is realized by reforming and assisting with auxiliary functional components.
The invention relates to a high-efficiency evaporation condensation refrigerating device based on a dehumidification evaporation cooling supercooling method, which consists of a solution circulation loop, an air circulation loop and a vapor compression refrigeration cycle; the solution circulation loop comprises a dehumidifier, a dilute liquid storage tank, a dilute solution pump, a solution throttle valve, a liquid-liquid heat exchanger, a solar heat collector, an auxiliary heater, a regenerator, a fan, a concentrated liquid storage tank, a concentrated solution pump and a solution cooler; wherein, a part of the dilute solution at the lower part of the dehumidifier is connected with the sprayer at the upper part of the regenerator through a dilute liquid storage tank, a dilute solution pump, a liquid-liquid heat exchanger, a solar heat collector and an auxiliary heater, the other part is connected with a concentrated solution pipeline behind the liquid-liquid heat exchanger through a throttle valve, and a fan a is connected with the lower part of the regenerator.
The air circulation loop comprises an air precooler, a heat regenerator, a first fan, an evaporative cooler, an air throttle valve, an exhaust valve, an air supply valve, a water supply valve, a refrigerant water pump and a water supplementing device; the air humidified in the evaporative cooler is connected with the lower part of the dehumidifier through the heat exchanger, the air dehumidified in the dehumidifier is connected with the lower part of the evaporative cooler through the air precooler, the heat regenerator and the first fan, the air supply valve is connected with the lower part of the dehumidifier, the exhaust valve is connected with a pipeline between the heat regenerator and the air throttle valve, the water replenishing device is connected with the bottom of the evaporative cooler through the water supply valve, and the water at the bottom of the evaporative cooler is connected with the sprayer at the upper part of the evaporative cooler through the water pump.
The vapor compression refrigeration cycle comprises an evaporator, a compressor, a condenser, a refrigerant supercooling section in the evaporative cooler and a throttle valve. The air heated by the condenser is connected with the lower part of the regenerator, and the refrigerant after the condenser enters the evaporative cooler through the supercooling section.
The invention relates to a refrigerant supercooling method of a high-efficiency evaporation condensation refrigerating device based on a dehumidification evaporation cooling supercooling method, which comprises the following steps that dilute solution in a dehumidifier is conveyed into a regenerator through a liquid-liquid heat exchanger and a solar heat collector by a pump, and concentrated solution which is regenerated in the regenerator enters the dehumidifier through the pump, the liquid-liquid heat exchanger and a solution cooler to form a solution circulation loop; the air circulation loop adopts two air circulation modes: in summer, the humidity of the outside air is high in humid and hot climate, a closed air circulation mode is adopted, an air supply valve and an exhaust valve are closed, an air throttle valve is opened, the air humidified in an evaporative cooler is sent to a dehumidifier through a heat exchanger, and the dehumidified air enters the evaporative cooler through an air precooler, a heat regenerator and a first fan. In transition seasons, the moisture content of outside air is low, a fresh air circulation mode is adopted, fresh air enters a dehumidifier through an air supply valve, the dehumidified air enters an evaporative cooler through an air precooler, a heat regenerator and a first fan, and the dehumidified air is discharged through an exhaust valve after the heat regenerator releases cold energy; the water replenishing device replenishes water to the evaporation cooler, the water enters the evaporation cooler through the sprayer to be evaporated, and the refrigerant enters the supercooling section in the evaporation cooler through the throttle valve, the evaporator, the compressor and the condenser to finish the refrigerant supercooling process.
The method utilizes the low water vapor partial pressure in the dehumidified air to evaporate the water in the evaporation cooler, absorbs the heat of the air and the water, reduces the temperature of the air and the water, cools the refrigerant from the condenser, and enables the refrigerant to be supercooled in a supercooling section in the evaporation cooler.
The refrigerant supercooling process of the method is completed in an evaporative cooler, the refrigerant passes through a throttle valve, an evaporator, a compressor and a condenser and then enters the evaporative cooler for supercooling, and the supercooled refrigerant passes through the throttle valve again to form a vapor compression refrigeration cycle.
The above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above embodiment, but equivalent modifications or changes made by those skilled in the art according to the present disclosure should be included in the scope of the present invention as set forth in the appended claims.
Claims (3)
1. A subcooling device for an evaporative condensing refrigeration system, comprising: the device comprises a solution dehumidification evaporation cooling circulation loop and an evaporation condensation refrigeration circulation loop, wherein cold water generated by the solution dehumidification evaporation cooling circulation loop is used for providing supercooling for a refrigerant after a condenser in the evaporation condensation refrigeration circulation, and a connecting part of the two circulation loops is an evaporation cooler (18);
the solution dehumidification evaporation cooling circulation comprises a solution circulation loop and an air circulation loop; wherein,
the solution circulation loop comprises a dehumidifier (6), a dilute liquid storage tank (7), a dilute solution pump (8), a liquid-liquid heat exchanger (9), a solar heat collector (10), a regenerator (11), a second fan (23), a concentrated liquid storage tank (12), a concentrated solution pump (13), a first solution throttle valve (25), a second solution throttle valve (26), an auxiliary heater (27) and a solution cooler (14);
the lower part output of dehumidifier (6) is connected with diluted reservoir (7) input, and the output of diluted reservoir (7) is divided into two routes through diluted solution pump (8):
one path is connected with the right input end of the liquid-liquid heat exchanger (9);
the other path is connected with the input end of the solution cooler (14) through a first solution throttle valve (25);
the left output end of the liquid-liquid heat exchanger (9) is divided into two paths:
one path is connected with the input end of a solar heat collector (10), and the output end of the solar heat collector (10) is connected with the input end of the upper part of the regenerator (11);
the other path is connected with the input end of an auxiliary heater (27) through a second solution throttle valve (26), the output end of the auxiliary heater (27) is connected with the input end of the upper part of the regenerator (11), and a second fan (23) is connected with the lower part of the regenerator (11);
the lower output end of the regenerator (11) is connected with the input end of a concentrated liquid storage tank (12), the output end of the concentrated liquid storage tank (12) is connected with the lower input end of a liquid-liquid heat exchanger (9) through a concentrated solution pump (13), the upper output end of the liquid-liquid heat exchanger (9) is connected with the input end of a solution cooler (14), and the output end of the solution cooler (14) is connected with the upper part of a dehumidifier (6);
the air circulation loop comprises an air precooler (15), a heat regenerator (16), a first fan (17), an evaporative cooler (18), an exhaust valve (19), an air supply valve (20), a water supply valve (21), a refrigerant water pump (22), a water supplementing device (24) and an air throttle valve (28);
the upper portion output terminal of dehumidifier (6) connects the input of air precooler (15), and the output of air precooler (15) connects the upside input of regenerator (16), and the downside output of regenerator (16) connects the downside input of evaporative cooler (18) through first fan (17), and the upside output terminal of evaporative cooler (18) connects the right side input of regenerator (16), and the left side output terminal of regenerator (16) divides two the tunnel:
one path is connected with the lower input end of the dehumidifier (6) through an air throttle valve (28);
the other path is communicated with the environment through an exhaust valve (19); the air supply valve (20) is connected with the lower part of the dehumidifier (6); the output end of the water replenishing device (24) is connected with the lower output end of the evaporative cooler (18) through a water feeding valve (21), and the lower output end of the evaporative cooler (18) is connected with the upper part of the evaporative cooler (18) through a refrigerant water pump (22);
the vapor compression refrigeration cycle loop comprises an evaporator (1), a compressor (2), a condenser (3), a refrigerant supercooling section (4) in an evaporative cooler (18) and a throttle valve (5);
the output end of the evaporator (1) is connected with the input end of the compressor (2), the output end of the compressor (2) is connected with the input end of the condenser (3), the output end of the condenser (3) is connected with the input end of the refrigerant supercooling section (4), and the output end of the refrigerant supercooling section (4) is connected with the input end of the evaporator (1) through the throttle valve (5); the exhaust air of the condenser (3) is connected with the lower part of the regenerator (11).
2. A subcooling device for an evaporative condensation refrigeration system as described in claim 1, wherein: in the evaporative cooler (18), a refrigerant water area at the lower part of the evaporative cooler (18) is connected with a sprayer positioned at the upper part of the evaporative cooler (18) through a refrigerant water pump (22), and a refrigerant supercooling section (4) is arranged at the lower part of the sprayer.
3. A supercooling method for an evaporative condensation type refrigerating system is characterized by comprising three processes of solution circulation, air circulation and vapor compression refrigerating circulation;
in the solution circulation process, concentrated solution is adopted in the dehumidifier (6) to absorb water vapor in air so as to maintain the moisture absorption capacity of the air entering the evaporative cooler (18), the diluted concentration of the solution is reduced after the solution absorbs moisture, the diluted solution enters the regenerator (11) through a diluted solution pump to be heated and regenerated, the concentration is improved, and the capacity of absorbing water vapor is restored again;
in the air circulation process, the partial pressure of water vapor in the dehumidified air is low, the water vapor evaporated by spray water is continuously absorbed in the evaporation cooler (18), the water is evaporated and vaporized to absorb the heat of the air and the water, in the vapor compression refrigeration circulation process, a refrigerant enters a refrigerant supercooling section in the evaporation cooler (18) through a throttle valve (5), an evaporator (1), a compressor (2) and a condenser (3), and the low-temperature water and the air in the evaporation cooler (18) are continuously evaporated to absorb the heat of the refrigerant, so that the refrigerant is cooled until the refrigerant is supercooled;
in the air circulation process, the humidified air adopts two air circulation modes: in summer, the humidity of the outside air is high in humid and hot climate, a closed air circulation mode is adopted, the air humidified in the evaporative cooler (18) is sent to the dehumidifier (6) through the liquid-liquid heat exchanger (9), and the dehumidified air enters the evaporative cooler (18) through the air precooler (15), the heat regenerator (16) and the first fan (17);
in transition seasons, the moisture content of outside air is low, a fresh air circulation mode is adopted, fresh air enters a dehumidifier through an air supply valve (20), the dehumidified air enters an evaporative cooler (18) through an air precooler (15), a heat regenerator (16) and a first fan (17), and the dehumidified air is discharged through an exhaust valve (19) after the heat regenerator (16) releases cold energy; the circulating water in the evaporative cooler is supplied by a water replenishing device (24) at the lower part of the evaporative cooler (18).
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| CN 201110338077 CN102410675B (en) | 2011-11-01 | 2011-11-01 | Over-cooling device and over-cooling method for evaporative condensation type refrigeration system |
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| CN 201110338077 CN102410675B (en) | 2011-11-01 | 2011-11-01 | Over-cooling device and over-cooling method for evaporative condensation type refrigeration system |
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| CN102410675B true CN102410675B (en) | 2013-06-05 |
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| CN103047795B (en) * | 2012-12-27 | 2015-04-15 | 深圳市奥宇控制系统有限公司 | Evaporating and refrigerating system |
| CN103185379B (en) * | 2013-03-29 | 2015-01-07 | 江苏大学 | Novel solar energy liquid dehumidifying air-conditioning system and implementation method |
| CN104034145B (en) * | 2014-06-12 | 2016-08-24 | 石曾矿 | Heat-pump dehumidification device |
| CN104613560B (en) * | 2015-01-28 | 2017-10-27 | 中国科学院工程热物理研究所 | The twin-stage solution dehumidification system of driving is closed in a kind of low-temperature heat source and Electricity Federation |
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| CN1710345A (en) * | 2005-06-10 | 2005-12-21 | 东南大学 | Radiation cold-supplying air-conditioner driven by solar energy and radiation cold-supply method |
| CN2916472Y (en) * | 2004-01-15 | 2007-06-27 | 绍兴吉利尔科技发展有限公司 | Solution dehumidifying cooling and compression type heat pump composite system |
| CN101059289A (en) * | 2007-06-06 | 2007-10-24 | 西安建筑科技大学 | Solution dehumidification evaporation and cooling air conditioner device capable of utilizing indoor exhaust air cool and heat |
| CN202328942U (en) * | 2011-11-01 | 2012-07-11 | 东南大学 | Supercooling device for evaporative condensate type refrigeration system and method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2916472Y (en) * | 2004-01-15 | 2007-06-27 | 绍兴吉利尔科技发展有限公司 | Solution dehumidifying cooling and compression type heat pump composite system |
| CN1710345A (en) * | 2005-06-10 | 2005-12-21 | 东南大学 | Radiation cold-supplying air-conditioner driven by solar energy and radiation cold-supply method |
| CN101059289A (en) * | 2007-06-06 | 2007-10-24 | 西安建筑科技大学 | Solution dehumidification evaporation and cooling air conditioner device capable of utilizing indoor exhaust air cool and heat |
| CN202328942U (en) * | 2011-11-01 | 2012-07-11 | 东南大学 | Supercooling device for evaporative condensate type refrigeration system and method thereof |
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