CN100567853C - A kind of backheating type sodium rhodanate-ammonia absorption heat pump system - Google Patents
A kind of backheating type sodium rhodanate-ammonia absorption heat pump system Download PDFInfo
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- CN100567853C CN100567853C CNB2008101042561A CN200810104256A CN100567853C CN 100567853 C CN100567853 C CN 100567853C CN B2008101042561 A CNB2008101042561 A CN B2008101042561A CN 200810104256 A CN200810104256 A CN 200810104256A CN 100567853 C CN100567853 C CN 100567853C
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- ammonia
- absorber
- pipe
- sodium rhodanate
- heat exchanger
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/62—Absorption based systems
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Abstract
The present invention is a kind of backheating type sodium rhodanate-ammonia absorption heat pump system, belongs to air-conditioning technical field.The outer tube of pipe-in-pipe heat exchanger links to each other with circulating water outlet with the recirculated water inlet in many, article three, interior Guan Yiduan links to each other with the heat exchange coil of the ammonia steam (vapor) outlet of generator, rare sodium rhodanate-ammonia taphole and absorber inside inlet respectively, the other end of corresponding three interior pipes respectively with choke valve, absorber in nozzle and the dense sodium rhodanate-ammonia taphole of absorber bottom link to each other.The other end of a choke valve links to each other with the inlet of evaporimeter by single internal tube double-tube heat exchanger outer tube, second throttle valve successively, and the outlet of evaporimeter links to each other with the ammonia inlet of absorber by the interior pipe of single internal tube double-tube heat exchanger.The present invention with sodium rhodanate-ammonia as refrigeration working medium to producing sub-zero temperature, saved the rectifier unit of ammoniacal liquor system simultaneously, it also can reach higher refrigerating efficiency with the requirement that lower heat source temperature just can satisfy drive system.
Description
Technical field
The present invention relates to a kind of backheating type sodium rhodanate-ammonia absorption heat pump system, the waste heat source and needing of being applied to have a surplus heats, the occasion of refrigeration and hot water supply apparatus, as at room conditioning, and air conditioning for automobiles, and on some refrigeration machines, belong to air-conditioning technical field.
Background technology
At present, the employed CFC class of compression refrigerating machine working medium is destroyed atmospheric ozone layer, and human health and the ecological environment that is relied on have been caused huge adverse effect, solves the depletion of the ozone layer problem and has become the duty-bound urgent task in countries in the world.Simultaneously, have a large amount of surplus used heat not develop yet in the world, other low-temperature heat source is also underused as solar energy, geothermal energy.To these low temperature heat energies, heat pump is a kind of up-and-coming means of utilizing, particularly absorption heat pump, owing to utilized cheap heat energy, to the not broken ring of environment, each side is better than compression heat pump simultaneously.
The lithium bromide system of former studies can only produce temperature above zero, and corrosivity is stronger, and application is restricted.What research was more at present is the ammonia water absorbing heat pump.The ammoniacal liquor system is because the boiling point of water and ammonia is approaching, ammonia evaporation when in generator, heating, water also evaporates, reduce the thermal efficiency, needed rectifier unit simultaneously, increased equipment investment and energy consumption, also limited simultaneously the raising of heat utilization efficiency and refrigerating efficiency, it also needs booster pump in addition, and power consumption is bigger, so demand incompatible energy-conservation at present, the refrigeration situation.
Common ammonia hydrogen water diffusion absorption type refrigeration system has added diffusant-hydrogen on the basis of ammoniacal liquor system at present, its basic procedure as shown in Figure 1, the concentrated solution that enters generator 1 is through heating, enter into rectifier 17 after the evaporation, wherein liquid state passes back into generator 1, gaseous ammonia is through condenser 14 condensations, and is cold again through gas heat-exchanger 15, enters evaporimeter 6.In evaporimeter 6,, facilitated the rapid sweat cooling of ammonia owing to the influence of hydrogen.The ammonia hydrogen water gaseous mixture that is come out by evaporimeter 6 enters absorber 7 after gas heat-exchanger 15 heat exchange.After being cooled, the weak solution of coming out from generator 1 also enters absorber 7 solution heat exchanger 16, liquor ammoniae dilutus absorbs ammonia formation liquor ammoniae fortis in absorber 7, again take place after solution heat exchanger 16 preheatings, entering generator 1 under the effect of solution pump 8, and hydrogen comes back to evaporimeter, so constitutes circulation.This systematic working medium is to adopting ammonia and water, therefore must be provided with rectifier unit, also have the ammoniacal liquor system to utilize siphon-pump to circulate at present simultaneously, but the solution pump refrigerating capacity of comparing be generally less, be difficult to use in the refrigerating capacity occasions with great demand, and refrigerating capacity is difficult for regulating.
Summary of the invention
The objective of the invention is to be to overcome the above-mentioned deficiency of existing heat pump, a kind of back-heating type sodium sulfocyanate-ammonia absorption type heat pump is provided, native system just can satisfy the requirement of drive system and can reach higher refrigerating efficiency (COP) with lower heat source temperature, and make full use of internal system condensation heat, absorb the purpose that heat realization such as heat heats.
To achieve these goals, the present invention has taked following technical scheme.Include generator 1, evaporimeter 6, absorber 7, solution pump 8, many interior pipe-in-pipe heat exchangers 2 and single internal tube double-tube heat exchanger 4.Wherein: the outer tube of pipe-in-pipe heat exchanger 2 is connected with recirculated water inlet 12 and circulating water outlet 13 respectively in many, article three, interior Guan Yiduan links to each other with heat exchange coil 11 inlets of the ammonia steam (vapor) outlet of generator 1, rare sodium rhodanate-ammonia taphole and absorber 7 inside respectively, the other end of corresponding three interior pipes is connected with nozzle 9 and solution pump 8 in choke valve 3, the absorber 7 respectively, and the other end of solution pump 8 is connected with the dense sodium rhodanate-ammonia taphole of absorber 7 bottoms; The other end of a choke valve 3 is connected with an end of single internal tube double-tube heat exchanger 4 outer tubes, the other end of outer tube is connected by the inlet of second throttle valve 5 with evaporimeter 6, and the outlet of evaporimeter 6 is connected with the ammonia inlet of absorber 7 by the interior pipe of single internal tube double-tube heat exchanger 4 again; The heat exchange coil 11 of absorber 7 inside is connected with the dense sodium rhodanate-ammonia solution inlet of generator 1.
Among the present invention, recirculated water by pipe-in-pipe heat exchanger 2 outer tubes in many, carry out heat exchange with pure ammonia pipeline, rare sodium rhodanate-ammonia solution pipeline and three interior pipes of dense sodium rhodanate-ammonia pipeline, play condenser, forecooler effect, the heat of simultaneously effectively having utilized system to take away, be used for producing life and use hot water, replaced three plate type heat exchangers in the absorption system in the past.
Single internal tube double-tube heat exchanger 4 among the present invention has two effects: 1) the low temperature ammonia with evaporimeter 6 outlets further cools off ammoniacal liquor, provides and keep a low temperature environment; 2) temporarily store ammoniacal liquor as fluid reservoir, the ammoniacal liquor flow that enters evaporimeter 6 by adjusting realizes that refrigerating capacity is adjustable, has solved the problem that refrigerating capacity is not easy to regulate in absorption system in the past.In addition, two choke valves are arranged in the system of the present invention, wherein a choke valve 3 is positioned at after many pipe-in-pipe heat exchangers 2, and second throttle valve 5 is positioned at after the single internal tube double-tube heat exchanger 4.Cold-producing medium through twice cooling, twice throttling after, enter fully sweat cooling of evaporimeter 6, improve refrigerating capacity.
In absorption system, because absorption process is an exothermic process, if thereby untimely the taking away of the absorption that produces heat will influence assimilation effect and influence systemic circulation, absorption heat in the native system absorber 7 is taken away by two parts, a part is by being absorbed by rare sodium rhodanate-ammonia solution of pipe-in-pipe heat exchanger 2 precoolings in many that nozzle 9 sprays, a part is then absorbed by same dense sodium rhodanate-ammonia solution through too much interior pipe-in-pipe heat exchanger 2 precoolings in addition, absorption process is carried out smoothly, improve the whole system cycle efficieny.
The present invention with sodium rhodanate-ammonia as refrigeration working medium to producing sub-zero temperature, saved the rectifier unit of ammoniacal liquor system simultaneously, it just can satisfy the requirement of drive system and can reach higher refrigerating efficiency (COP) with lower heat source temperature, and make full use of internal system condensation heat, absorb heat such as heat and realize the purpose that heats, simultaneously pollution-free, and have energy-saving effect.
Description of drawings
Fig. 1 ammonia hydrogen water diffusion absorption type refrigeration system flow chart
A kind of backheating type sodium rhodanate-ammonia absorption heat pump system flow chart of Fig. 2 the present invention
Among the figure: 1. generator, 2. many in pipe-in-pipe heat exchanger, 3. choke valves, 4. single internal tube double-tube heat exchanger, 5. second throttle valve, 6. evaporimeter, 7. absorber, 8. solution pump, 9. nozzle, 10. thermal source, 11. heat exchange coils, 12. recirculated waters inlet, 13. circulating water outlet, 14. condensers, 15. gas heat-exchangers, 16. solution heat exchanger, 17. rectifiers.
The specific embodiment
The invention will be further described below in conjunction with accompanying drawing 2:
Native system includes generator 1, evaporimeter 6, absorber 7, solution pump 8, many interior pipe-in-pipe heat exchangers 2 and single internal tube double-tube heat exchanger 4.The outer tube of pipe-in-pipe heat exchanger 2 connects recirculated water inlet 12 and circulating water outlet 13 respectively in many, article three, interior Guan Yiduan is connected with heat exchange coil 11 inlet of the ammonia steam (vapor) outlet of generator 1, rare sodium rhodanate-ammonia taphole and absorber 7 inside respectively, the other end of corresponding three interior pipes respectively with choke valve 3, absorber 7 in nozzle 9 and be connected with the dense sodium rhodanate-ammonia taphole of absorber 7 bottoms by solution pump 8.One end of single internal tube double-tube heat exchanger 4 outer tubes is connected with a choke valve 3, and after the other end connected evaporimeter 6 through second throttle valve 5, the interior pipe by single internal tube double-tube heat exchanger 4 was connected with the ammonia inlet of absorber 7 again.Absorber 7 is connected with the dense sodium rhodanate-ammonia solution inlet of generator 1 by the heat exchange coil 11 of inside.
The operation of native system mainly comprises three circulations, promptly pure ammonia (comprising ammonia and pure ammoniacal liquor) circulation, and rare sodium rhodanate-ammonia solution circulation and the circulation of dense sodium rhodanate-ammonia by finishing this three circulations, reach the effect of the final heat pump of system.
The running of native system is as follows: in generator 1, behind dense sodium rhodanate-ammonia solution process thermal source 10 ebuillition of heated, because the boiling point of ammonia and sodium sulfocyanate differs bigger, pure ammonia is evaporated in a large number, and dense sodium rhodanate-ammonia solution becomes rare sodium rhodanate-ammonia solution simultaneously.Pipe in one of pipe-in-pipe heat exchangers 2 in wherein how ammonia enters, the recirculated water cooling of being come in and gone out from recirculated water inlet 12 and circulating water outlet 13 by the outer tube ammoniacal liquor that congeals into, and through after the choke valve 3 throttling step-downs, the outer tube that enters single internal tube double-tube heat exchanger 4 temporarily stores, the low temperature ammonia that Guan Zhongcong evaporimeter 6 comes out in the pipe-in-pipe heat exchanger 4 in the coverlet further cools off simultaneously, pass through the 5 further throttlings of second throttle valve afterwards, and regulate the ammoniacal liquor flow that enters evaporimeter 6 as required, make the abundant sweat cooling of ammoniacal liquor, raising refrigerating capacity and realization refrigerating capacity can be regulated.Finally enter absorber 7 after the ammoniacal liquor heat exchange of the ammonia that comes out from evaporimeter 6 through the interior pipe of single internal tube double-tube heat exchanger 4 and outer tube, the dense sodium rhodanate-ammonia solution of rare sodium rhodanate-ammonia solution absorption formation that spray by nozzle 9.Rare sodium rhodanate-ammonia solution here is from generator 1, flow into many in the interior pipe of pipe-in-pipe heat exchangers 2, and in too much the cooling of pipe-in-pipe heat exchanger 2 outer tube recirculated waters, the nozzles 9 that enter afterwards in the absorber 7 spray.And the dense sodium rhodanate-ammonia solution that forms in absorber 7 bottoms is because be in low-pressure end, the interior pipe and the outer tube recirculated water of pipe-in-pipe heat exchanger 2 carry out heat exchange in how also entering under the effect of solution pump 8, enter once more with the form of heat exchange coil 11 then and carry out heat exchange in the absorber 7, effectively take away the absorption heat that absorption processes produce in the absorber 7, and finally send in the generator 1 by thermal source 10 once more heating evaporation begin new circulation.
Claims (1)
1, a kind of backheating type sodium rhodanate-ammonia absorption heat pump system includes generator (1), evaporimeter (6), absorber (7) and solution pump (8); It is characterized in that: also include many interior pipe-in-pipe heat exchangers (2) and single internal tube double-tube heat exchanger (4); Wherein: the outer tube of pipe-in-pipe heat exchanger (2) is connected with recirculated water inlet (12) and circulating water outlet (13) respectively in many, article three, interior Guan Yiduan links to each other with heat exchange coil (11) inlet of the ammonia steam (vapor) outlet of generator (1), rare sodium rhodanate-ammonia taphole and absorber (7) inside respectively, the other end of corresponding three interior pipes is connected with nozzle (9) and solution pump (8) in a choke valve (3), the absorber (7) respectively, and the other end of solution pump (8) is connected with the dense sodium rhodanate-ammonia taphole of absorber (7) bottom; The other end of a choke valve (3) is connected with an end of single internal tube double-tube heat exchanger (4) outer tube, the other end of outer tube is connected by the inlet of second throttle valve (5) with evaporimeter (6), and the outlet of evaporimeter (6) is connected with the ammonia inlet of absorber (7) by the interior pipe of single internal tube double-tube heat exchanger (4) again; The inner heat exchange coil (11) of absorber (7) is connected with the dense sodium rhodanate-ammonia solution inlet of generator (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008101042561A CN100567853C (en) | 2008-04-18 | 2008-04-18 | A kind of backheating type sodium rhodanate-ammonia absorption heat pump system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008101042561A CN100567853C (en) | 2008-04-18 | 2008-04-18 | A kind of backheating type sodium rhodanate-ammonia absorption heat pump system |
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| Publication Number | Publication Date |
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| CN101261055A CN101261055A (en) | 2008-09-10 |
| CN100567853C true CN100567853C (en) | 2009-12-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2008101042561A Expired - Fee Related CN100567853C (en) | 2008-04-18 | 2008-04-18 | A kind of backheating type sodium rhodanate-ammonia absorption heat pump system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101915478B (en) * | 2010-08-13 | 2011-11-16 | 上海交通大学 | Ammonia water absorption refrigerating machine driven by marine exhaust |
| ITMI20110817A1 (en) * | 2011-05-11 | 2012-11-12 | Eni Sp A | "HEAT EXCHANGE SYSTEM" |
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Effective date of registration: 20111205 Address after: 239001 Anhui Chuzhou fengle Road Economic Development Zone West, south of the reservoir in agriculture Co-patentee after: China Domestic Electrical Equipment Inst. Patentee after: Anhui Zhongjia Zhirui Technology Co., Ltd. Co-patentee after: Beijing University of Technology Address before: 100053 Beijing city Xuanwu District oblique Street No. 29 Co-patentee before: Beijing University of Technology Patentee before: China Domestic Electrical Equipment Inst. |
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Owner name: ANHUI CHEARI ZHIRUI TECHNOLOGY CO., LTD. CHINA DOM Free format text: FORMER OWNER: CHINA DOMESTIC ELECTRICAL EQUIPMENT INST. BEIJING UNIVERSITY OF TECHNOLOGY Effective date: 20120815 Owner name: BEIJING CHEARI ZHIRUI TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: ANHUI CHEARI ZHIRUI TECHNOLOGY CO., LTD. Effective date: 20120815 |
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Effective date of registration: 20120815 Address after: 100053 Beijing city Xuanwu District oblique Street No. 29 Patentee after: Beijing Zhongjia Zhirui Science & Technology Co., Ltd. Patentee after: Anhui Zhongjia Zhirui Technology Co., Ltd. Patentee after: China Domestic Electrical Equipment Inst. Patentee after: Beijing University of Technology Address before: 239001 Anhui Chuzhou fengle Road Economic Development Zone West, south of the reservoir in agriculture Patentee before: Anhui Zhongjia Zhirui Technology Co., Ltd. Patentee before: China Domestic Electrical Equipment Inst. Patentee before: Beijing University of Technology |
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Granted publication date: 20091209 Termination date: 20140418 |