CN1451933A - Absorption refrigerator - Google Patents
Absorption refrigerator Download PDFInfo
- Publication number
- CN1451933A CN1451933A CN03108488A CN03108488A CN1451933A CN 1451933 A CN1451933 A CN 1451933A CN 03108488 A CN03108488 A CN 03108488A CN 03108488 A CN03108488 A CN 03108488A CN 1451933 A CN1451933 A CN 1451933A
- Authority
- CN
- China
- Prior art keywords
- heat
- absorption
- temperature
- exhaust gas
- liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B15/00—Sorption machines, plants or systems, operating continuously, e.g. absorption type
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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
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
Abstract
An absorption refrigerator increases the heat recovery of the heat of exhaust gas emitted from a combustor added to a high-temperature regenerator. First, second and third exhaust gas heat recovering instruments 23, 24 and 25 are provided, in which the exhaust gas radiates the heat through the heat exchange with dilute absorption liquid, and distribution control valves 26 and 27 are provided. The distribution control valve 27 is controlled so that a temperature sensor 29 continuously detects a predetermined temperature (adequate temperature higher than the dew point of steam contained in the exhaust gas, for example, 100[deg.]C), and a controller 30 to control the distribution control valve 26 so that the temperature detected by a temperature sensor 28 maintains a predetermined value (a temperature slightly higher than the crystallization temperature of concentrated absorption liquid, for example, 40[deg.]C) is provided. In addition, the third exhaust gas heat recovering instrument 25 and an exhaust pipe 22 on the downstream side thereof are formed of weather resistant steel or rust-proof steel.
Description
Technical field
The present invention relates to the high absorption refrigerating machine of a kind of thermal efficiency.
Background technology
As shown in Figure 2, the exhaust that the gas burner 2 of rare absorption liquid ebuillition of heated of high-temp regenerator 1 will be discharged deliver to high-temperature heat-exchanging 10 and first exhaust gas heat recovering instrument 23 between the high-temp regenerator 1 of being located at absorption liquid pipe 11 successively and be located at cryogenic heat exchanger 9 and high-temperature heat-exchanging 10 between second exhaust gas heat recovering instrument 24, to improve the temperature of self-absorption device 7 to rare absorption liquid of high-temp regenerator 1 conveying, reduce the gas burner 2 required heats that add, reduce Fuel Consumption.This absorption refrigerating machine is known.
That is to say, in the absorption refrigerating machine of said structure, about 40 ℃ of discharging of self-absorption device 7 are (during specified operation, below identical) rare absorption liquid be to rise to about 140 ℃ by cryogenic heat exchanger 9, second exhaust gas heat recovering instrument 24, high-temperature heat-exchanging 10,23 heating of first exhaust gas heat recovering instrument respectively and flow into high-temp regenerator 1, so can save the fuel of gas burner 2 consumption.
In addition, when the temperature of rare absorption liquid of supplying with at the temperature and the self-absorption device 7 of the exhaust of discharging from gas burner 2 is all low, the aperture of enlargement discharge control valve 26X, the amount of rare absorption liquid that increase is flowed around second exhaust gas heat recovering instrument 24, reduce and come self-purging recuperation of heat in second exhaust gas heat recovering instrument 24, prevent the remarkable reduction of delivery temperature, prevent condensation, the dewfall of steam contained in the exhaust.
Summary of the invention
But, in above-mentioned existing absorption refrigerating machine, even the temperature of exhaust is reduced to the temperature of the contained water vapor condensation of exhaust, dewfall, the temperature height of rare absorption liquid that its temperature is also discharged than self-absorption device, so the recovery of available heat is still insufficient, therefore, be necessary to continue to reclaim the heat that exhaust is possessed the problem that Here it is will solve by the person of buying of absorption refrigerating machine.
In order to solve above-mentioned prior art problems, first aspect present invention provides a kind of absorption refrigerating machine, and it comprises: high-temp regenerator, and it uses the burner ebuillition of heated, and the cold-producing medium evaporation is separated, and obtains refrigerant vapour and intermediate absorption fluid from rare absorption liquid; Low-temperature regenerator, it uses the refrigerant vapour that is generated by high-temp regenerator to heat the intermediate absorption fluid that this high-temp regenerator generates and supplies with, and further evaporation separates cold-producing medium, obtains refrigerant vapour and concentrated absorption solution from intermediate absorption fluid; Condenser, it is supplied with by this low-temperature regenerator and heats intermediate absorption fluid and condensed refrigerant liquid, and simultaneously, the refrigerant vapour that the cooling low-temperature regenerator generates and supplies with obtains refrigerant liquid; Evaporimeter, its refrigerant liquid that this condenser is supplied with is dispersed on the heat pipe, captures heat by the fluid that flows in the heat pipe, makes the cold-producing medium evaporation; Absorber, it separates the concentrated absorption solution of supplying with behind the refrigerant vapour by low-temperature regenerator and absorbs the refrigerant vapour that this evaporimeter generates and supplies with, and forms rare absorption liquid, and supplies to high-temp regenerator; Cryogenic heat exchanger, it makes the rare absorption liquid and the concentrated absorption solution of this absorber of coming in and going out carry out heat exchange; High-temperature heat-exchanging, it makes intermediate absorption fluid and rare absorption liquid of the high-temp regenerator of coming in and going out carry out heat exchange.This absorption refrigerating machine also comprises: exhaust gas heat recovering instrument, and it makes the rare absorption liquid that flows around cryogenic heat exchanger carry out heat exchange with the exhaust of spontaneous combustion device discharge; Volume control device, its control loop is around the amount of the mobile rare absorption liquid of cryogenic heat exchanger.
The absorption refrigerating machine of second aspect present invention is on the basis of described first aspect absorption refrigerating machine, and it can import and the exhaust of carrying out heat exchange by rare absorption liquid of high-temperature heat-exchanging and/or cryogenic heat exchanger to exhaust gas heat recovering instrument.
The absorption refrigerating machine of third aspect present invention be described first or the basis of second aspect absorption refrigerating machine on, at least exhaust gas heat recovering instrument and certainly the blast pipe of this exhaust gas heat recovering instrument downstream side form by weather resisting steel or stainless steel.
Description of drawings
Fig. 1 is the key diagram of one embodiment of the invention;
Fig. 2 is the key diagram of prior art.
The specific embodiment
Below to be cold-producing medium with water, to be that the absorption refrigerating machine of absorption liquid is example explanation embodiments of the invention with lithium bromide (LiBr) aqueous solution.
With reference to Fig. 1 one embodiment of the invention are described.Among the figure; label 1 is a high-temp regenerator; it utilizes with the gas firepower heating absorption liquid and the evaporation separation cold-producing medium of the gas burner 2 that is fuel; label 3 is low-temperature regenerators; protection 4 is condensers; label 5 is high temperature tubes of taking in low-temperature regenerator 3 and condenser 4; label 6 is evaporimeters; label 7 is absorbers; label 8 is low temperature tubes of taking in evaporimeter 6 and absorber 7; label 9 is cryogenic heat exchangers; label 10 is high-temperature heat-exchangings; label 11～13rd, the absorption liquid pipe; label 14 is to absorb liquid pump; label 15～17th, refrigerant pipe; label 19 is refrigerated medium pumps; label 20 is cold water pipes; label 21 is cooling water pipes; label 22 is to make the blast pipe that passes through from the exhaust of gas burner 2 discharges; label 23 is first exhaust gas heat recovering instrument; label 24 is second exhaust gas heat recovering instrument; label 25 is the 3rd exhaust gas heat recovering instrument; label 26; the 27th, dividing control valve; the dirty part that label 28 is provided in a side of absorption liquid pipe 13 detects the temperature sensor of the temperature of the concentrated absorption solution after cryogenic heat exchanger 9 and rare absorption liquid carry out heat exchange and heat release; label 29 is provided in a side of the temperature sensor of the delivery temperature of blast pipe 22 detections after second exhaust gas heat recovering instrument 24 is carried out heat exchange and heat release with rare absorption liquid of second exhaust gas heat recovering instrument, 24 downstream sides; label 30 is controllers; it controls dividing control valve 27; make temperature sensor 29 continue to detect for example 100 ℃ of set points of temperature; simultaneously; control dividing control valve 26; rare absorption liquid distributed supply to cryogenic heat exchanger 9 and the 3rd exhaust gas heat recovering instrument 25, what make concentrated absorption solution that temperature sensor 28 detects maintains for example for example 40 ℃ of crystallization temperature of a little higher than concentrated absorption solution of set point of temperature.
In absorption refrigerating machine of the present invention, the 3rd exhaust gas heat recovering instrument 25 and form by weather resisting steel or stainless steel from the blast pipe 22 of the 3rd exhaust gas heat recovering instrument 25 downstream sides.
In the absorption refrigerating machine of said structure, when making rare absorption liquid ebuillition of heated with gas burner 2 burning gases and with high-temp regenerator 1, can obtain from the refrigerant vapour of rare absorption liquid evaporation separation with separate the intermediate absorption fluid that refrigerant vapour increases absorption liquid concentration.
The high temperature refrigerant steam that is generated by high-temp regenerator 1 enters low-temperature regenerator 3 by refrigerant pipe 15, heating is generated by high-temp regenerator 1 and utilizes absorption liquid pipe 12 to enter the intermediate absorption fluid of low-temperature regenerator 3 through high-temperature heat-exchanging 10, and heat release, condensation, enter condenser 4.
Be heated the cold-producing medium that separates by the intermediate absorption fluid evaporation at low-temperature regenerator 3 and enter condenser 4, carry out heat exchange and condensation liquefaction with the water that in cooling water pipe 21, flows, enter evaporimeter 6 by refrigerant pipe 17 with the cold-producing medium of supplying with from refrigerant pipe 15 condensations.
On the heat pipe 20A that the refrigerant liquid that enters evaporimeter 6 and be stored in refrigerant liquid storage portion utilizes refrigerated medium pump 19 to be dispersed in to be connected on the cold water pipe 20, carry out heat exchange and evaporation with the water of supplying with by cold water pipe 20 that is situated between, the water of cooling heat pipe 24A internal flow.
Cold-producing medium by evaporimeter 6 evaporations enters absorber 7, by low-temperature regenerator 3 heating, the cold-producing medium evaporation is separated, and being absorbed the higher absorption liquid of liquid concentration is that the concentrated absorption solution that self-priming liquid collecting tube 13 is supplied with and scattered from the top via cryogenic heat exchanger 9 absorbs.
In absorber 7 absorption refrigeration agent and the thin out absorption liquid of concentration is the running that rare absorption liquid utilization absorbs liquid pump 14, suitably heated respectively in cryogenic heat exchanger 9, the 3rd exhaust gas heat recovering instrument 25, second exhaust gas heat recovering instrument 24, high-temperature heat-exchanging 10, first exhaust gas heat recovering instrument 23, the self-priming liquid collecting tube is sent to high-temp regenerator 1.
As mentioned above, when the running of absorption refrigerating machine was carried out, the cold water that is cooled because of the heat of gasification of cold-producing medium at the heat pipe 20A that is located at evaporimeter 6 inside turned round so can freeze to wait to cool off by the not shown air-conditioning load of cold water pipe 20 supplies capable of circulation.
In the absorption refrigerating machine of said structure, same with described existing absorption refrigerating machine shown in Figure 2, utilize to absorb liquid pump 14 and be transported to about 40 ℃ rare absorption liquid of absorber 7 of high-temp regenerator 1 at cryogenic heat exchanger 9, the 3rd exhaust gas heat recovering instrument 25, second exhaust gas heat recovering instrument 24, high-temperature heat-exchanging 10, first exhaust gas heat recovering instrument 23 is suitably heated respectively, temperature rises to about 140 ℃, be fed into high-temp regenerator 1 then, thus with do not have first exhaust gas heat recovering instrument 23, second exhaust gas heat recovering instrument 24, but the existing absorption refrigerating machine of the 3rd exhaust gas heat recovering instrument 25 is compared the fuel that trim gas burner 2 consumes.
That is to say, exhaust by blast pipe 22 gas supplied burners 2 is carried out heat exchange and heat release in first exhaust gas heat recovering instrument 23 and the total amount of utilizing absorption liquid pump 14 self-absorption devices 7 to be transported to rare absorption liquid of high-temp regenerator 1 through absorption liquid pipe 11, and its heat of possessing is reclaimed by rare absorption liquid.
Therefore, in the recuperation of heat of the exhaust in second heat regenerator 24, the temperature of exhaust is maintained at 100 ℃ of described regulation, so, even when all low starting of the temperature of exhaust, rare absorption liquid or during the fractional load running, from gas burner discharge, the temperature of mobile exhaust blast pipe 22 in also is maintained at 100 ℃ that are higher than dew-point temperature (is 10～70 ℃ of the dew-point temperatures of natural gas burning and gas-exhausting when being fuel with the city combustion gas), can not make the contained water vapor condensation of exhaust and produce draining, can not cause the etching problem of the parts that draining brings yet.
In the 3rd exhaust gas heat recovering instrument 25, dividing control valve 26 is by controller 30 control, makes for example 40 ℃ in the crystallization temperature of for example a little higher than concentrated absorption solution of temperature maintenance that temperature sensor 28 detects.Therefore, be maintained in the scope of a little higher than crystallization temperature, carry out the recuperation of heat of exhaust energetically in temperature through the concentrated absorption solution of absorption liquid pipe 13 inflow absorbers 7.
At this moment, even the temperature to the exhaust of concentrated absorption solution heat release drops to below the dew point of the contained steam of exhaust, because the 3rd exhaust gas heat recovering instrument 25 and form by weather resisting steel or stainless steel itself from the blast pipe 22 of the 3rd exhaust gas heat recovering instrument 25 downstream sides, even event and condensate liquid Long contact time, parts can not get rusty yet.
In addition, the invention is not restricted to the foregoing description, in the scope that does not break away from the described purport of claims, can carry out various distortion and implement.
For example also can replace dividing control valve 26,27, flow control valve is arranged on the absorption liquid pipe or the absorption liquid pipe around second, third exhaust gas heat recovering instrument 24,25 that second, third exhaust gas heat recovering instrument 24,25 is housed, same with the absorption refrigerating machine that is provided with dividing control valve 26,27, by controller 30 control, the absorption liquid of appropriate amount is supplied to second, third exhaust gas heat recovering instrument 24,25.
In the 3rd exhaust gas heat recovering instrument 25, because the contained steam condensation sometimes of exhaust, so for the water capacity that makes condensation is easily discharged, the 3rd exhaust gas heat recovering instrument preferably is set to rare absorption liquid and flows in horizontally disposed a plurality of pipes, and the structure that exhaust is flowed outside this pipe along the vertical direction.
Absorption refrigerating machine can be the refrigerator that is exclusively used in the cooling operation of freezing etc. as mentioned above, it also can be following refrigerator, its pipe arrangement is connected to and makes the refrigerant vapour that is generated by high-temp regenerator 1 heating directly supply to low temperature tube 8 with the absorption liquid that refrigerant vapour is evaporated after separating, cooling water does not flow to cooling water pipe 21, carry out the heating of rare absorption liquid by gas burner 2, for example will be heated to the water about 55 ℃ at the heat pipe 20A of evaporimeter 6 through cold water pipe (under the situation in hot water circuit, preferably be known as the pipe of hot-water line) 20, circulation supplies to load, so also can heat etc. to add heat run.
Cool off etc. and supply to the fluid of air-conditioning load etc. at evaporimeter 6,, also can resemble and to utilize latent heat to carry out the heat transmission ground, make phase transformation such as fluorine carbon cold-producing medium and supply with except that the foregoing description does not carry out phase transformation like that and supplies with the water etc.
As mentioned above, according to the present invention, the overwhelming majority of the heat that available exhaust can be possessed reclaims.And, because major part forms by weather resisting steel or stainless steel, so even with the condensate liquid Long contact time, parts can not get rusty yet.In addition, Ang Gui steel are by the rising significantly of restriction purposes avoidable cost.
Claims (3)
1, a kind of absorption refrigerating machine, it comprises: high-temp regenerator, it uses the burner ebuillition of heated, and the cold-producing medium evaporation is separated, and obtains refrigerant vapour and intermediate absorption fluid from rare absorption liquid; Low-temperature regenerator, it uses the refrigerant vapour that is generated by high-temp regenerator to heat the intermediate absorption fluid that this high-temp regenerator generates and supplies with, and further evaporation separates cold-producing medium, obtains refrigerant vapour and concentrated absorption solution from intermediate absorption fluid; Condenser, it is supplied with by this low-temperature regenerator and heats intermediate absorption fluid and condensed refrigerant liquid, and simultaneously, the refrigerant vapour that the cooling low-temperature regenerator generates and supplies with obtains refrigerant liquid; Evaporimeter, its refrigerant liquid that this condenser is supplied with is dispersed on the heat pipe, captures heat by the fluid that flows in the heat pipe, makes the cold-producing medium evaporation; Absorber, it absorbs the refrigerant vapour that this evaporimeter generates and supplies with by separating the concentrated absorption solution of supplying with behind the refrigerant vapour from low-temperature regenerator, forms rare absorption liquid, and supplies to high-temp regenerator; Cryogenic heat exchanger, it makes the rare absorption liquid and the concentrated absorption solution of this absorber of coming in and going out carry out heat exchange; High-temperature heat-exchanging, it makes intermediate absorption fluid and rare absorption liquid of the high-temp regenerator of coming in and going out carry out heat exchange, it is characterized in that, comprising: exhaust gas heat recovering instrument, it makes the rare absorption liquid that flows around cryogenic heat exchanger carry out heat exchange with the exhaust of spontaneous combustion device discharge; Volume control device, its control loop is around the amount of the mobile rare absorption liquid of cryogenic heat exchanger.
2, absorption refrigerating machine as claimed in claim 1 is characterized in that, it can import and the exhaust of carrying out heat exchange by rare absorption liquid of high-temperature heat-exchanging and/or cryogenic heat exchanger to exhaust gas heat recovering instrument.
3, absorption refrigerating machine as claimed in claim 1 or 2 is characterized in that, at least exhaust gas heat recovering instrument and certainly the blast pipe of this exhaust gas heat recovering instrument downstream side form by weather resisting steel or stainless steel.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002110375A JP3889655B2 (en) | 2002-04-12 | 2002-04-12 | Absorption refrigerator |
| JP110375/2002 | 2002-04-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1451933A true CN1451933A (en) | 2003-10-29 |
| CN1206491C CN1206491C (en) | 2005-06-15 |
Family
ID=29243231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031084885A Expired - Fee Related CN1206491C (en) | 2002-04-12 | 2003-04-14 | Absorption refrigerator |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3889655B2 (en) |
| KR (1) | KR20030081153A (en) |
| CN (1) | CN1206491C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101713598B (en) * | 2008-09-29 | 2011-11-09 | 三洋电机株式会社 | Absorption refrigerating machine |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100869274B1 (en) * | 2007-08-10 | 2008-11-19 | 어코드 주식회사 | Absorption type refrigerating machine |
| KR101103337B1 (en) * | 2009-10-16 | 2012-01-11 | 한국과학기술원 | Gas Precooling Equipment for Natural Gas Liquefaction Using Absorption Refrigeration |
-
2002
- 2002-04-12 JP JP2002110375A patent/JP3889655B2/en not_active Expired - Fee Related
-
2003
- 2003-04-11 KR KR10-2003-0022849A patent/KR20030081153A/en not_active Application Discontinuation
- 2003-04-14 CN CNB031084885A patent/CN1206491C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101713598B (en) * | 2008-09-29 | 2011-11-09 | 三洋电机株式会社 | Absorption refrigerating machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2003302118A (en) | 2003-10-24 |
| JP3889655B2 (en) | 2007-03-07 |
| KR20030081153A (en) | 2003-10-17 |
| CN1206491C (en) | 2005-06-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050615 Termination date: 20110414 |