CN102147135A - Lithium bromide absorption type water chilling unit for direct cooling type cold-blast air evaporator - Google Patents
Lithium bromide absorption type water chilling unit for direct cooling type cold-blast air evaporator Download PDFInfo
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- CN102147135A CN102147135A CN2011100456167A CN201110045616A CN102147135A CN 102147135 A CN102147135 A CN 102147135A CN 2011100456167 A CN2011100456167 A CN 2011100456167A CN 201110045616 A CN201110045616 A CN 201110045616A CN 102147135 A CN102147135 A CN 102147135A
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Abstract
The invention discloses a lithium bromide absorption type water chilling unit for a direct cooling type cold-blast air evaporator, which comprises a lithium bromide absorption type water chilling unit and a refrigerant circulator and a lithium bromide solution circulator thereof, wherein the lithium bromide absorption water chilling unit comprises a condenser 1, a generator 2, a direct cooling type cold-blast air evaporator 3, an absorber 4, a solution heat exchanger 5, a solution pump 6 and a refrigerant pump 7, and the water chilling unit is directly connected with an air conditioner air system. The lithium bromide absorption water chilling unit is characterized in that the direct cooling type cold-blast air evaporator 3 is a vacuum closed cylinder consisting of air-cooled heat transfer pipe sets 9, and air is cooled in an air-cooled manner. By adopting the invention, the contradiction between unit performance and heat source grade in the traditional lithium bromide absorption water chilling technology is eliminated, the unit performance parameter is improved, and advantages are created for continuous application of solar refrigerating air conditioners and comprehensive utilization of low-temperature waste heat and exhaust heat.
Description
Technical field
The present invention relates to a kind of direct-cooling type cold wind evaporimeter lithium bromide absorption cold water unit, in particular, relate to a kind of lithium bromide absorption cold water unit equipment that adopts evaporimeter directly to cool off air.
Background technology
Lithium-bromide absorption-type refrigerating machine is realized refrigeration with steam, hot water, oil and gas heat or other used heat that produces that directly burns as thermal source, because CFCs and HCFCs cold-producing medium have destruction to atmospheric ozone layer, the HFCs cold-producing medium exists greenhouse effects again, under the external environment condition of and reply climate change in short supply at current electric power energy, lithium-bromide absorption-type refrigerating machine has very high promotional value.China has become the big producing country of Absorption Refrigerator in the world, the developing direction of lithium-bromide absorption-type refrigerating machine mainly is high efficiency, is applied to thermoelectric cold cogeneration system and recovery waste heat used heat and solar energy utilization etc. that walking road energy-saving, the environment-friendly type lithium-bromide absorption-type refrigerating machine is the inexorable trend of development.Therefore, development multipotency source comprehensive utilization type lithium-bromide absorption-type refrigerating machine not only can make full use of renewable resource, improve efficiency of energy utilization, also can make full use of waste heat of plant used heat resource, when reclaiming the energy, reduce thermal pollution, improve environment, also can alleviate the imbalance between supply and demand of electrical network, conservation of power industry capital construction investment, these have important and practical meanings for the using energy source situation of improving country.
Lithium bromide absorption cold water unit generally can be divided into two kinds of single-action and economic benefits and social benefits.Mono-potency lithium bromide is made up of generator, condenser, absorber, evaporimeter and solution heat exchanger.Double effect absorption lithium bromide cooling-water machine group generally by high pressure generator, low pressure generator, condenser, absorber, evaporimeter, cryogenic fluid heat exchanger, high-temperature solution heat exchanger, coagulate the water regenerator and form.The optimum working temperature of single-effect lithium bromide absorption refrigerating machine is 80 ℃～100 ℃, and its maximum COP value can reach 0.7 when heat source temperature is 85 ℃.Because solution is subjected to the restriction of crystallization condition, the heat source temperature of refrigeration machine can not be above 150 ℃.The COP of double-effect lithium bromide absorption chiller group is about 1.1～1.2, and driving heat source can be the high-temperature-hot-water more than 150 ℃, or the saturated vapor of 0.25～0.8MPa (meter pressure), and its maximum COP value can reach 1.2 when heat source temperature is 130 ℃.And the COP of triple effect lithium-bromide absorption-type refrigerating machine group is about 1.65～1.75, and its driving heat source temperature then needs more than 200 ℃.The two-stage refrigeration system with lithium bromide absorption, lower to the requirement of heat source temperature than the requirement of mono-potency lithium bromide absorption system, use 70 ℃～80 ℃ hot water to drive.Therefore, the two-stage refrigeration system with lithium bromide absorption is more suitable for utilizing low-grade energy than mono-potency lithium bromide absorption system.But the COP value of two-stage refrigeration system with lithium bromide absorption is lower, has only about 0.3～0.4, and consumption of cooling-water is about the twice of single-effect lithium bromide absorption refrigerating machine group, and initial cost is bigger.With the Driven by Solar Energy refrigeration system with lithium bromide absorption is example, adopts flat board or heat pipe type vacuum tube collector to collect solar energy, and the hot water that produces 80 ℃～95 ℃ drives single-action, economic benefits and social benefits or twin-stage Absorption Refrigerator.The temperature of unit generator driving heat source generally need be greater than 80 ℃, and is as shown in table 1.
The solar energy refrigeration system with lithium bromide absorption relatively under the every kW refrigeration work consumption of table 1
No matter the single-effective absorption handpiece Water Chilling Units still is the double effect absorption handpiece Water Chilling Units, absorption cold water unit in the past must be media with cold water, by chilled water pump cold is transported to air-conditioning box or fan coil end by chilled water, transferring cold wind to by air-conditioning box or fan coil then enters in the air conditioning chamber, the present invention is the evaporimeter employing direct-cooling type cold wind evaporimeter with unit, room air promptly directly freezes, improved the evaporating temperature of absorption cold water unit like this, can reduce the demand of heat source temperature when promoting the unit performance parameter, for the utilization of low temperature exhaust heat used heat and solar refrigeration and air-conditioning have been created advantage.
Summary of the invention
Patent of the present invention adopts the evaporimeter of direct-cooling type cold wind evaporimeter as lithium bromide absorption cold water unit, the comparable absorption in the past cold water unit of evaporating temperature improves 10 ℃, this not only improves absorption cold water unit COP value, also created good condition, more helped the utilization of low-temperature waste heat and solar refrigeration and air-conditioning for reducing heat source temperature.For achieving the above object, technical scheme of the present invention provides a kind of direct-cooling type cold wind evaporimeter lithium bromide absorption cold water unit.
The inventive point of this patent is that room air promptly directly freezes with the evaporimeter employing direct-cooling type cold wind evaporimeter of unit.Room air process blower fan delivers into the directly cooling evaporator in the absorption air-cooled unit, and air is by the fin and the interior water as refrigerant heat exchange of finned tube of evaporimeter, and water as refrigerant heat absorption evaporation is taken away the air heat, and made the air themperature reduction.And absorption cold water unit in the past must be media with cold water, by chilled water pump cold is transported to air-conditioning box or fan coil by 7/12 ℃ of chilled water, transfers cold wind to by air-conditioning box or fan coil then and enters in the air conditioning chamber.
For achieving the above object, technical scheme of the present invention is:
A kind of direct-cooling type cold wind evaporimeter lithium bromide absorption cold water unit, it is characterized in that lithium bromide absorption cold water unit and cold-producing medium circulation and lithium-bromide solution circulation that this equipment is made up of condenser 1, generator 2, direct-cooling type cold wind evaporimeter 3, absorber 4, solution heat exchanger 5 and solution pump 6 and cryogenic fluid pump 7, handpiece Water Chilling Units realizes directly being connected with air conditioning duct system, and its feature also is the vacuum sealing tube that described direct-cooling type cold wind evaporimeter 3 is made up of air-cooled heat transfer tube group 9.
In technique scheme, described direct-cooling type cold wind evaporimeter 3 is the vacuum sealing tube, tube inside comprise hollow blossom type drain post 8, heat transfer tube group 9, on seal half 11, half 14 of lower seal, upper perforated plate 13 and lower perforated plate 15 and side seal board 22 and form, its feature is that also heat transfer tube group 9 is communicated with upward half 11 of envelope, half 14 of lower seal and side seal board 22, formed the vacuum enclosure of cold-producing medium under same evaporating pressure, upper perforated plate 13 and lower perforated plate 15 form airduct, connect air conditioning duct system.
In technique scheme, the heat transfer tube group 9 of described direct-cooling type cold wind evaporimeter 3 is finned pipe group, heat transfer tube group 9 outsides are aluminium fin 16, heat transfer tube group 9 inside are cold-producing medium, cold-producing medium directly and heat transfer tube group 9 air outside conduct heat, realize air-cooled cooling air, cold directly by the circulation air via axial flow blower 19 transmission ﹠ distribution to the air-conditioning system end.
In technique scheme, the hollow blossom type drain post 8 of described direct-cooling type cold wind evaporimeter 3 is positioned at half 11 inside of envelope, hollow blossom type drain post 8 bottoms are connected heat transfer tube group 9 tops, water as refrigerant from condenser enters direct-cooling type cold wind evaporimeter 3 by feed tube 18, water as refrigerant flows into heat transfer tube group 9 inwalls by hollow blossom type drain post 8 tops, form falling film evaporation, carry out heat exchange with the pipe outer air, the refrigerant vapour that evaporates, enter absorber 4 by escape pipe 17, the cold-producing medium of condenser 1 throttling is logical via cryogenic fluid pump 7 circulated sprinklings; Hollow blossom type drain post 8 outsides enter heat transfer tube group 9 and carry out heat exchange with the pipe outer air.
In technique scheme, the hollow blossom type drain post 8 of described direct-cooling type cold wind evaporimeter 3 is to be made up of blossom type outer space 20 and inboard hollow space 21, and blossom type outer space 20 is a liquid refrigerant, and inboard hollow space 21 is a refrigerant vapour.
In technique scheme, the air of described direct-cooling type cold wind evaporimeter 3 is the treatment system that new wind, return air or new wind return air mix, realize cooling or cool-down dehumidification process by the control evaporating temperature, new wind mixes with return air via blower fan 19 by air-valve 10 delivers to direct-cooling type cold wind evaporimeter 3.
In technique scheme, the driving Cooling and Heat Source of described generator 2 is that heat source temperature is the 60 ℃～low temperature exhaust heat used heat more than 70 ℃ and the hot water of solar thermal collector generation, and its feature is that also the evaporating temperature of described direct-cooling type cold wind evaporimeter 3 is 5 ℃～15 ℃.
Beneficial effect of the present invention:
This patent not only can make cold directly directly enter in the air conditioning chamber by the air of circulation, and main advantage is that evaporating temperature is just can satisfy the room conditioning demand about 15 ℃ in the unit, the evaporating temperature of absorption cold water unit in the past is about 5 ℃, can improve 10 ℃ by more absorption cold water unit than in the past.Evaporator temperature improves, and the unit heat source temperature is significantly reduced.When evaporating temperature was 15 ℃, during 70 ℃ of heat source temperatures, generatine set heat efficiency COP can reach 0.7, and the efficient during with 90 ℃ of absorption cold water unit heat source temperatures in the past is suitable, for cryogenic heat wasting utilization and solar refrigeration and air-conditioning have been created advantage.Utilized the hot water of 70 degree to be freezed in the past, and must utilize twin-stage to absorb and to realize, and thermal efficiency COP only was 0.4.
The present invention adopts and has solved the contradiction of traditional lithium-bromide absorption-type refrigerating machine technology between unit performance and thermal source grade, promoted the unit performance parameter, reduced the driving heat source grade requirement, expanded the range of application of lithium bromide absorption cold water unit, satisfy energy-saving and emission-reduction, water saving and the requirement of environment control reliably, for the comprehensive utilization of low temperature exhaust heat used heat and the continuous application of solar refrigeration and air-conditioning have been created advantage.
Description of drawings
Below in conjunction with accompanying drawing, be illustrated by concrete experiment method, so that the present invention becomes clearer.
Fig. 1. be direct-cooling type cold wind evaporimeter lithium bromide absorption cold water unit flow chart of the present invention
Fig. 2. be the profile 1 of direct-cooling type cold wind evaporation structure of the present invention
Fig. 3. be the B-B profile of direct-cooling type cold wind evaporation structure of the present invention
Fig. 4. the A profile of direct-cooling type cold wind evaporation structure of the present invention
Fig. 5. be direct-cooling type cold wind evaporimeter double-effect lithium bromide absorption type handpiece Water Chilling Units flow chart of the present invention
Label in the accompanying drawing: 1 is condenser, and 2 is generator, and 3 is direct-cooling type cold wind evaporimeter, 4 is absorber, and 5 is solution heat exchanger, and 6 is solution pump, 7 is cryogenic fluid pump, and 8 is hollow blossom type drain post, and 9 is heat transfer tube group, 10 is air-valve, and 11 is half of last envelope, and 12 is airduct, 13 is upper perforated plate, 14 is half of lower seal, and 15 is lower perforated plate, and 16 is the aluminium fin, 17 is steam outlet pipe, 18 is feed tube, and 19 is axial flow blower, and 20 is plum blossom post outer space, 21 is plum blossom post outer space, 22 is side seal board, and 23 is high-temperature solution heat exchanger, and 24 is high pressure generator.
The specific embodiment
Elaborate content of the present invention below in conjunction with the drawings and specific embodiments.Should be appreciated that the present invention is not limited to following preferred implementation, preferred implementation is as just exemplary illustration of the present invention.
As Fig. 1. shown in, direct-cooling type cold wind evaporimeter lithium bromide absorption cold water unit flow chart 1 of the present invention is the absorption cold water unit of mono-potency lithium bromide among the figure.Driving heat source heating makes refrigerant vapour flow into condenser 1 by generator 2 becomes liquid state via water quench, enter 3 vaporizations of direct-cooling type cold wind evaporimeter after the step-down of liquid refrigerant process choke valve, refrigerator steam is become weak solution by the concentrated solution absorption from generator 1 in absorber 4, via solution pump 6 and solution heat exchanger 5, realize that the high temperature concentrated solution heat exchange of coming out with generator 1 comes back to generator 1 and realizes circulation.
As Fig. 2. shown in, the direct-cooling type cold wind evaporimeter 3 of direct-cooling type cold wind evaporimeter lithium bromide absorption cold water unit is realized directly being connected with air conditioning duct system, direct-cooling type cold wind evaporimeter 3 is the vacuum sealing tube, establish envelope half 11 and lower seal respectively half 14, tube is inner to be separated by upper perforated plate 13 and lower perforated plate 15, upper perforated plate 13 and lower perforated plate 15 spaces are provided with the air-cooled heat transfer tube group 9 that has fin, form airduct, connect air conditioning duct system, finned heat transfer tube group 9 inner for cold-producing medium directly and heat transfer tube group 9 air outside conduct heat, realize air-cooled cooling air, cold directly by the circulation air via axial flow blower 19 transmission ﹠ distribution to the air-conditioning system end.
As Fig. 2., Fig. 3. and Fig. 4. shown in, the hollow blossom type drain post 8 of direct-cooling type cold wind evaporimeter 3 is positioned at half 11 inside of envelope, hollow blossom type drain post 8 bottoms are connecting heat transfer tube group 9 tops, refrigerant vapour enters heat transfer tube group 9 by hollow blossom type drain post 8 tops and carries out heat exchange with the pipe outer air, and the cold-producing medium of condenser 1 throttling enters heat transfer tube group 9 via cryogenic fluid pump 7 circulated sprinklings by hollow blossom type drain post 8 outsides and carries out heat exchange with the pipe outer air.Air can be the treatment system that new wind, return air or new wind return air mix, by the evaporating temperature realization cooling or the cool-down dehumidification process of control direct-cooling type cold wind evaporimeter 3 inside.
As Fig. 5. shown in, direct-cooling type cold wind evaporimeter lithium bromide absorption cold water unit flow chart 2 of the present invention is the double-effect lithium bromide absorption type handpiece Water Chilling Units.Unit has increased a high pressure generator 24 and high-temperature solution heat exchanger 23 in handpiece Water Chilling Units inside, the low driving heat source of sending out generator 2 can be the hot water of low temperature exhaust heat used heat or solar thermal collector generation.
Claims (7)
1. direct-cooling type cold wind evaporimeter lithium bromide absorption cold water unit, it is characterized in that lithium bromide absorption cold water unit and cold-producing medium circulation and lithium-bromide solution circulation that this equipment is made up of condenser 1, generator 2, direct-cooling type cold wind evaporimeter 3, absorber 4, solution heat exchanger 5 and solution pump 6 and cryogenic fluid pump 7, handpiece Water Chilling Units realizes directly being connected with air conditioning duct system, and its feature also is the vacuum sealing tube that described direct-cooling type cold wind evaporimeter 3 is made up of air-cooled heat transfer tube group 9.
2. direct-cooling type cold wind evaporimeter lithium bromide absorption cold water unit according to claim 1, it is characterized in that described direct-cooling type cold wind evaporimeter 3 is the vacuum sealing tube, tube inside comprises hollow blossom type drain post 8, heat transfer tube group 9, half 11 of last envelope, half 14 of lower seal, upper perforated plate 13, lower perforated plate 15 and side seal board 22 are formed, its feature is that also heat transfer tube group 9 is communicated with half 11 of last envelope, half 14 of lower seal and side seal board 22, formed the vacuum enclosure of cold-producing medium under same evaporating pressure, upper perforated plate 13 and lower perforated plate 15 form airduct, directly connect air conditioning duct system.
3. direct-cooling type cold wind evaporimeter lithium bromide absorption cold water unit according to claim 2, the heat transfer tube group 9 that it is characterized in that described direct-cooling type cold wind evaporimeter 3 is finned pipe group, heat transfer tube group 9 outsides are aluminium fin 16, heat transfer tube group 9 inside are cold-producing medium, cold-producing medium directly and heat transfer tube group 9 air outside conduct heat, realize air-cooled cooling air, cold directly by the circulation air via axial flow blower 19 transmission ﹠ distribution to the air-conditioning system end.
4. direct-cooling type cold wind evaporimeter lithium bromide absorption cold water unit according to claim 2, the hollow blossom type drain post 8 that it is characterized in that described direct-cooling type cold wind evaporimeter 3 is positioned at half 11 inside of envelope, hollow blossom type drain post 8 bottoms are connected heat transfer tube group 9 tops, water as refrigerant from condenser enters direct-cooling type cold wind evaporimeter 3 by feed tube 18, water as refrigerant flows into heat transfer tube group 9 inwalls by hollow blossom type drain post 8 tops, form falling film evaporation, carry out heat exchange with the pipe outer air, the refrigerant vapour that evaporates, enter absorber 4 by escape pipe 17, the cold-producing medium of condenser 1 throttling is logical via cryogenic fluid pump 7 circulated sprinklings; Hollow blossom type drain post 8 outsides enter heat transfer tube group 9 and carry out heat exchange with the pipe outer air.
5. the hollow blossom type drain post 8 according to the described direct-cooling type cold wind of claim 4 evaporimeter 3 is to be made up of blossom type outer space 20 and inboard hollow space 21, and blossom type outer space 20 is a liquid refrigerant, and inboard hollow space 21 is a refrigerant vapour.
6. direct-cooling type cold wind evaporimeter lithium bromide absorption cold water unit according to claim 2, the air that it is characterized in that described direct-cooling type cold wind evaporimeter 3 is the treatment system that new wind, return air or new wind return air mix, realize cooling or cool-down dehumidification process by the control evaporating temperature, new wind mixes with return air via blower fan 19 by air-valve 10 delivers to direct-cooling type cold wind evaporimeter 3.
7. direct-cooling type cold wind evaporimeter lithium bromide absorption cold water unit according to claim 1, the driving Cooling and Heat Source that it is characterized in that generator 2 is that heat source temperature is the 60 ℃～low temperature exhaust heat used heat more than 70 ℃ or the hot water of solar thermal collector generation, and its feature is that also the evaporating temperature of described direct-cooling type cold wind evaporimeter 3 is 5 ℃～15 ℃.
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| CN2011100456167A CN102147135A (en) | 2011-02-18 | 2011-02-18 | Lithium bromide absorption type water chilling unit for direct cooling type cold-blast air evaporator |
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| CN2011100456167A CN102147135A (en) | 2011-02-18 | 2011-02-18 | Lithium bromide absorption type water chilling unit for direct cooling type cold-blast air evaporator |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106322593A (en) * | 2015-07-03 | 2017-01-11 | 广州市华德工业有限公司 | Evaporative cooling type water chilling unit |
| CN110454897A (en) * | 2019-08-07 | 2019-11-15 | 西安工程大学 | A kind of evaporation cooling-solar energy absorption type refrigeration air-conditioning system |
| CN111336718A (en) * | 2019-08-30 | 2020-06-26 | 同方节能工程技术有限公司 | Heat pipe type absorption heat exchanger unit |
| CN114034092A (en) * | 2021-11-01 | 2022-02-11 | 嵊州市浙江工业大学创新研究院 | Waste heat refrigeration type integrated stove and control method thereof |
| CN114674136A (en) * | 2022-04-20 | 2022-06-28 | 广东省迅怡净化科技有限公司 | Efficient, environment-friendly and energy-saving drying device |
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| US4307575A (en) * | 1980-07-30 | 1981-12-29 | Nasa | Automotive absorption air conditioner utilizing solar and motor waste heat |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106322593A (en) * | 2015-07-03 | 2017-01-11 | 广州市华德工业有限公司 | Evaporative cooling type water chilling unit |
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| CN110454897A (en) * | 2019-08-07 | 2019-11-15 | 西安工程大学 | A kind of evaporation cooling-solar energy absorption type refrigeration air-conditioning system |
| CN110454897B (en) * | 2019-08-07 | 2020-12-01 | 西安工程大学 | Evaporative cooling-solar energy absorption type refrigeration air-conditioning system |
| CN111336718A (en) * | 2019-08-30 | 2020-06-26 | 同方节能工程技术有限公司 | Heat pipe type absorption heat exchanger unit |
| CN114034092A (en) * | 2021-11-01 | 2022-02-11 | 嵊州市浙江工业大学创新研究院 | Waste heat refrigeration type integrated stove and control method thereof |
| CN114674136A (en) * | 2022-04-20 | 2022-06-28 | 广东省迅怡净化科技有限公司 | Efficient, environment-friendly and energy-saving drying device |
| CN114674136B (en) * | 2022-04-20 | 2023-08-08 | 广东省迅怡净化科技有限公司 | Efficient, environment-friendly and energy-saving drying device |
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Owner name: GUO HAIXIN JIANGSU HUINENG NEW ENERGY TECHNOLOGY C Free format text: FORMER OWNER: GUO HAIXIN JIANGSU HUINENG NEW ENERGY TECHNOLOGY CO., LTD. KUNSHAN KLIMASYSTEMTECHNIKAIR CONDITIONING TECHNOLOGY CO., LTD. Effective date: 20120625 |
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Effective date of registration: 20120625 Address after: 226236 No. 42 Pearl Road, Binhai Industrial Park, Jiangsu, Qidong Applicant after: Wang Hongbin Co-applicant after: Guo Haixin Co-applicant after: Jiangsu Huineng New Energy Technology Co., Ltd. Co-applicant after: Kunshan Klimasystemtechnik Energy-Saving Technology Co., Ltd. Address before: 226236 No. 42 Pearl Road, Binhai Industrial Park, Jiangsu, Qidong Applicant before: Wang Hongbin Co-applicant before: Guo Haixin Co-applicant before: Jiangsu Huineng New Energy Technology Co., Ltd. Co-applicant before: Kunshan KlimaSystemTechnik Co., Ltd. |
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Application publication date: 20110810 |