CN201637182U - Device for refrigerating by using low-grade heat energy - Google Patents
Device for refrigerating by using low-grade heat energy Download PDFInfo
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- CN201637182U CN201637182U CN2010201885777U CN201020188577U CN201637182U CN 201637182 U CN201637182 U CN 201637182U CN 2010201885777 U CN2010201885777 U CN 2010201885777U CN 201020188577 U CN201020188577 U CN 201020188577U CN 201637182 U CN201637182 U CN 201637182U
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Abstract
The utility model discloses a device for refrigerating by using low-grade heat energy. The device mainly comprises a thermo-compressor, wherein the inside of the thermo-compressor is partitioned into a power cavity and a compression cavity by an elastic membrane; the power cavity is connected with a power working medium outlet and a power working medium inlet of a heat exchanger respectively; a stirrer is arranged at the inner bottom of the power cavity; ribs and a fan are arranged at the outer bottom of the power cavity; the compression cavity is connected with a refrigerating working medium outlet of an evaporator and a refrigerating working medium inlet of the heat exchanger respectively; and the refrigerating working medium outlet of the heat exchanger is connected with the refrigerating working medium inlet of the evaporator through a condenser. Due to the adoption of the device, renewable energy sources, such as solar energy can be taken as the running power of an air conditioner in a better way.
Description
Technical field
The utility model relates to a kind of device that utilizes the low grade heat energy refrigeration.
Background technology
The method of artificial cooling is a lot, mainly contains freezing by change of state, gas swell refrigeration, thermoelectric cooling etc.Divided by consuming mechanical energy (or electric energy) by way of compensation outside the steam compression type refrigerating of process, the absorption refrigeration that consumes heat energy, steam-sprayed refrigeration, absorption type refrigerating etc. are arranged still in the freezing by change of state.
Steam compression type refrigerating is modal refrigeration modes, and its most crucial parts are compressor, is normally driven by electric energy, has the high advantage of efficient.Yet electric air-conditioning has aggravated the peak valley imbalance of city electricity consumption in the widespread usage in summer, thereby need greatly develop air-conditioning that heat energy drives to realize energy complementation.Existing absorption refrigeration, steam-sprayed refrigeration and absorption type refrigerating all have their own characteristics each, and extensive use, but because various limiting factors, fail to be applied to domestic air conditioning so far.
The high pressure that refrigeration compressor can be exported will surpass the pairing saturated vapour pressure of refrigerant vapour condensation temperature at least, and its pressure of inspiration(Pi) will be lower than the pairing saturated vapour pressure of cold-producing medium evaporating temperature at least simultaneously.People have learned to utilize boiler generation high steam very early and have utilized the steam condensation to obtain negative pressure, use this principle and can produce the refrigeration compressor that heat energy drives, but at first to find can with the working medium of refrigerant pressure characteristic coupling.
Ammonia spirit belongs to zeotrope, and saturation vapour pressure is easy to obtain HCS a little more than normal pressure by the heating high concentration ammonia spirit at normal temperatures.But the saturated vapour pressure of correspondence was enough not low when the ammoniacal liquor mixed vapour of same concentration condensed at normal temperatures.
The utility model content
The purpose of this utility model is a kind of device that utilizes the low grade heat energy compress refrigerant vapor and realize kind of refrigeration cycle.
For achieving the above object, the device that utilizes the low grade heat energy refrigeration that the utility model provides mainly consists of:
One thermocompressor, its inside is divided into power cavity and compression chamber by elastic diaphragm;
Power cavity connects the power sender property outlet and the import of power working medium of heat exchanger respectively;
Bottom in the power cavity is equipped with agitator;
The outer bottom of power cavity is equipped with fin and fan;
Compression chamber connects the refrigeration working medium outlet of evaporimeter and the refrigeration working medium import of heat exchanger respectively;
The refrigeration working medium outlet of heat exchanger connects the refrigeration working medium import of evaporimeter by condenser.
In the described device, be connected with heater between the power sender property outlet of power cavity and heat exchanger.
In the described device, between the power working medium import of power cavity and heat exchanger the liquid pump is installed.
In the described device, the agitator that the power cavity inner bottom part is installed is the magnetic stirrer.
In the described device, between the power sender property outlet of power cavity and heat exchanger and the import of power working medium electrically-controlled valve is installed.
In the described device, between outlet of the refrigeration working medium of compression chamber and heat exchanger and the refrigeration working medium import electrically-controlled valve is installed.
The beneficial effects of the utility model are:
1) can utilize the low grade heat energy refrigeration;
2) in form unlike traditional electric air-conditioning complexity;
3) improved the heat energy utilization rate greatly by backheat.
Description of drawings
Fig. 1 is a schematic diagram of the present utility model, and this thermocompressor is with elastic diaphragm the thermocompressor inner space to be divided into power cavity and compression chamber.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is elaborated.
Embodiment 1
Please in conjunction with Fig. 1, the thermocompressor that present embodiment adopts is by elastic diaphragm the thermocompressor inner space to be divided into power cavity and compression chamber.
Selecting R600a for use is refrigeration working medium, selects mass ratio 32%NH for use
3, 20%NiCl
2And 48%H
2The solution of O is power working medium.
Evaporating temperature is decided to be 272K, and condensation temperature is decided to be 315K, is respectively 0.151MPa and 0.562MPa with the saturated vapour pressure of the corresponding R600a of said temperature.
The heat source temperature 355K of power working medium, the cooling of employing air, suppose chilling temperature 308K, be respectively 0.570MPa (353K)～0.652MPa (358K) and 0.109MPa (308K)～0.135MPa (313K) after measured with the corresponding mixed solution saturated vapour pressure of said temperature.
As seen, the gaseous pressure in power working medium when heating surpasses the required pressure of refrigeration working medium condensation, and the gaseous pressure the when gaseous pressure the during cooling of power working medium is lower than the refrigeration working medium evaporation can satisfy the condition of work of thermocompressor.
Refrigeration system workflow shown in Figure 1 is as follows:
Cold-producing medium evaporates in evaporimeter 2, the cold that produces is used for air-conditioning by cold water output, steam (is surrounded by 1-2 and 1-3 by the compression chamber that the A mouth flows into compressor 1, be the above space of elastic diaphragm 1-3 among Fig. 1), this process is by magnetic valve 8 controls, after the evaporation cavity pressure balance in compression chamber pressure and the evaporimeter 2, close magnetic valve 8.
Open D mouth magnetic valve, power working medium after the feasible heating sprays into power cavity by the D mouth and (is surrounded by 1-1 and 1-3, be the following space of elastic diaphragm 1-3 among Fig. 1), the ammonia flash distillation enters gas phase and forms gaseous mixture 1-5), nickel salt and most of water become droplet and are deposited in the power cavity bottom gradually to form mixed solution 1-4.Elastic diaphragm 1-3 to the compression chamber projection, makes the power cavity volumetric expansion under pressure reduction promotes, the compression chamber volume reduces.After pressure reached setting value (a little more than condensation of refrigerant pressure), D mouth control valve was closed.
Open B mouth magnetic valve, make the refrigeration working medium steam inflow heat exchanger 4 after the compression, close B mouth magnetic valve then.
Startup cooling fan 1-8, its flabellum are irony, can drive magnetic stirrer 1-6 (tetrafluoro coating) and rotate together.Shell 1-1,1-2 and fin 1-7 select stainless steel copper or that can not be magnetized for use.When fan does not rotate, because the layout of fin 1-7 is unfavorable for free convection, and inner nothing stirring, outwards the thermal resistance of heat radiation is bigger in the power cavity, helps keeping the temperature of power working medium.When fan rotated, heat convection was reinforced, and liquid phase 1-4 at first is cooled, and owing to the disturbance of magnetic stirrer 1-6, had strengthened the mass transfer of gas-liquid phase, and the solution that the ammonia in the gas phase is cooled down absorbs, and made the power cavity internal gas pressure descend.
Because power cavity pressure descends, elastic diaphragm 1-3 homing and to the power cavity depression, open A mouth magnetic valve this moment, makes evaporimeter 2 evaporation cavity inner vapors flow into compression chamber.Simultaneously, close cooling fan 1-8, open C mouth magnetic valve 8, starting impulse formula liquid pump 7 goes out power cavity with the power working medium solution pump that cools off, then closing liquid pump 7 and C mouth magnetic valve 8 and A mouth magnetic valve 8.
Power working medium solution pumps into heat exchanger 4 by liquid pump 7, enters heater 5 after the heat exchange, sprays into power cavity through the D mouth then, the circulation of a beginning new round.
Refrigeration working medium enters condenser 3 and continues condensation (condenser 3 is air cooling heat exchangers) after heat exchanger 4 heat releases, then, is back to evaporimeter 2 through choke valve 6, the circulation of a beginning new round.
Said process adopts other refrigeration working medium also can realize, just evaporating temperature and condensation temperature are different.For example, the evaporating temperature of R142b can be made as 274K (0.151MPa), and condensation temperature can be made as 314K (0.537MPa).
When concrete operation, the utility model adopts ammonia-ammino mixture-water mixed solution as power working medium, and wherein the ammino mixture mainly refers to a kind of or mixture in mantoquita and the nickel salt, is first-selected with the nickel chloride, but is not limited to nickel chloride.In addition, ammonia-ammonium hydrogen phosphate-water mixed solution also is available as working medium.In the mixed solution, the mass fraction of ammonia is controlled at 25%-35% and is advisable, and in order to prevent the salt crystallization, the mass ratio of nickel chloride and water about 1: 1-2 is advisable.Concrete proportioning can be decided according to the characteristic of selected cold-producing medium, and generally speaking, if condensation of refrigerant pressure is higher, then ammon amount is higher.Can select environment-friendly type working medium such as R134a, R142b, R600a and R600 for use is cold-producing medium.
Thermocompressor of the present utility model is most critical parts of realizing systemic circulation.Its main body is a pressure vessel, and interior of the container is split into two parts by elastic diaphragm, and the utility model is defined as power cavity and compression chamber respectively with these two parts.Charge into power working medium in the power cavity, charge into refrigeration working medium in the compression chamber.When power working medium was heated, ammonia (also comprising a spot of water) underwent phase transition, and caused power cavity pressure to raise, and promoted piston or elastic diaphragm and moved to opposite side, until pressure at both sides balance again.When the pressure chamber internal gas pressure reached setting value, refrigeration working medium will be compressed into superheated vapor, subsequently it is expelled to condenser.The power working medium of heat is cooled down, ammonia will be absorbed by solution, cause power cavity air pressure sharply to descend, piston or elastic diaphragm retraction, be lower than the air pressure of evaporation cavity in the evaporimeter until compression chamber air pressure, this moment, the evaporation cavity with evaporimeter was connected with compression chamber, will make the part cold-producing medium in the evaporimeter undergo phase transition and flow into compression chamber, thereby produced refrigeration.
Refrigeration working medium temperature after being compressed can raise, and becomes superheated vapor, and power working medium that is cooled and overheated refrigerant vapour at first carry out heat exchange in heat exchanger, and the latent heat when utilizing the sensible heat of superheated vapor and condensation makes power working medium be able to preheating.Relative with the temperature more higher thermal source of power working medium after the preheating carries out heat exchange.
The utility model can also add a certain amount of nickel salt or mantoquita in ammonia spirit, nickel chloride for example, be because nickel chloride can form complex with ammonia, can form six coordinate complex at most, can reduce the volatility of ammonia, so the ammonia spirit of the same concentration of this system has lower saturated vapour pressure.During heating, complexing ammonia becomes unstable and becomes free ammonia again.Therefore, ammonia-nickel chloride-water can provide power by a kind of device that is similar to Stirling-electric hybrid for the cold-producing medium compression as working medium.
The utility model adopts aforesaid device to replace the compressor of electric air-conditioning, utilizes the low-grade heat source about 80 ℃, can realize the steam compression type refrigerating circulation of environment-friendly type organic working medium efficiently.Have broad application prospects in a plurality of fields such as solar refrigeration, industrial exhaust heat refrigeration and ground refrigeration heats.
Claims (8)
1. a device that utilizes the low grade heat energy refrigeration is characterized in that, mainly consists of:
One thermocompressor, its inside is divided into power cavity and compression chamber by elastic diaphragm;
Power cavity connects the power sender property outlet and the import of power working medium of heat exchanger respectively;
Bottom in the power cavity is equipped with agitator;
The outer bottom of power cavity is equipped with fin and fan;
Compression chamber connects the refrigeration working medium outlet of evaporimeter and the refrigeration working medium import of heat exchanger respectively;
The refrigeration working medium outlet of heat exchanger connects the refrigeration working medium import of evaporimeter by condenser.
2. device as claimed in claim 1 is characterized in that, is connected with heater between the power sender property outlet of power cavity and heat exchanger.
3. device as claimed in claim 1 is characterized in that, between the power working medium import of power cavity and heat exchanger the liquid pump is installed.
4. device as claimed in claim 1 is characterized in that, the agitator that the power cavity inner bottom part is installed is the magnetic stirrer.
5. device as claimed in claim 1 is characterized in that, between the power sender property outlet of power cavity and heat exchanger electrically-controlled valve is installed.
6. device as claimed in claim 1 is characterized in that, between the power working medium import of power cavity and heat exchanger electrically-controlled valve is installed.
7. device as claimed in claim 1 is characterized in that, between the refrigeration working medium outlet of compression chamber and heat exchanger electrically-controlled valve is installed.
8. device as claimed in claim 1 is characterized in that, between the refrigeration working medium import of compression chamber and heat exchanger electrically-controlled valve is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201885777U CN201637182U (en) | 2010-05-07 | 2010-05-07 | Device for refrigerating by using low-grade heat energy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201885777U CN201637182U (en) | 2010-05-07 | 2010-05-07 | Device for refrigerating by using low-grade heat energy |
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| Publication Number | Publication Date |
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| CN201637182U true CN201637182U (en) | 2010-11-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010201885777U Expired - Lifetime CN201637182U (en) | 2010-05-07 | 2010-05-07 | Device for refrigerating by using low-grade heat energy |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102235767A (en) * | 2010-05-07 | 2011-11-09 | 中国科学院工程热物理研究所 | Refrigeration method and device by using low-grade heat energy |
| CN103438598A (en) * | 2013-08-20 | 2013-12-11 | 中国科学院工程热物理研究所 | Cascading refrigerating system and method based on forward and reverse cycle coupling |
| CN109667634A (en) * | 2018-11-28 | 2019-04-23 | 山东省科学院能源研究所 | Ammonia water mixture circulation system for low-grade heat power generation |
-
2010
- 2010-05-07 CN CN2010201885777U patent/CN201637182U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102235767A (en) * | 2010-05-07 | 2011-11-09 | 中国科学院工程热物理研究所 | Refrigeration method and device by using low-grade heat energy |
| CN103438598A (en) * | 2013-08-20 | 2013-12-11 | 中国科学院工程热物理研究所 | Cascading refrigerating system and method based on forward and reverse cycle coupling |
| CN103438598B (en) * | 2013-08-20 | 2016-01-20 | 中国科学院工程热物理研究所 | Based on folding type cooling system and the method for just inverse circulation coupling |
| CN109667634A (en) * | 2018-11-28 | 2019-04-23 | 山东省科学院能源研究所 | Ammonia water mixture circulation system for low-grade heat power generation |
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| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101117 |