CN111174464A - Double-effect double-energy water chilling unit - Google Patents
Double-effect double-energy water chilling unit Download PDFInfo
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- CN111174464A CN111174464A CN202010009116.7A CN202010009116A CN111174464A CN 111174464 A CN111174464 A CN 111174464A CN 202010009116 A CN202010009116 A CN 202010009116A CN 111174464 A CN111174464 A CN 111174464A
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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
- F25B30/00—Heat pumps
- F25B30/04—Heat pumps of the sorption type
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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
- F25B15/02—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas
- F25B15/06—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas the refrigerant being water vapour evaporated from a salt solution, e.g. lithium bromide
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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
- F25B39/00—Evaporators; Condensers
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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
- F25B41/00—Fluid-circulation arrangements
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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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Sorption Type Refrigeration Machines (AREA)
Abstract
The invention discloses a double-effect double-energy water chilling unit which comprises a steam generator, a steam low-temperature generator, a low-pressure hot water generator, a high-pressure hot water generator, a condenser, an absorber, an evaporator, a solution pump and pipelines for connecting all the parts, wherein a connection refrigeration loop of all the parts is divided into a steam heat source loop, a hot water heat source loop and a steam and hot water heat source loop. The double-effect double-energy cold water unit is characterized in that a circulation mode when a lithium bromide absorption heat pump unit has an independent steam heat source, an independent hot water heat source and a primary steam and hot water heat source coexist and the temperature difference of cold water is large is utilized, different generation pressure areas are manufactured on a generator by changing the circulation mode of cooling water, lithium bromide solutions with different concentrations can generate under corresponding generation pressures, and the lithium bromide solutions absorb refrigerant steam of an evaporator in an absorber according to different evaporation temperatures of refrigerant water of the evaporator, so that the temperature of the refrigerant water is distinguished.
Description
Technical Field
The invention relates to the technical field of water chilling units, in particular to a double-effect double-energy water chilling unit.
Background
The hot water type lithium bromide absorption refrigerator is a refrigerating apparatus which takes heat source as power, water as refrigerant and lithium bromide solution as absorbent to prepare low temperature water above 0 ℃. The refrigeration equipment has the advantages of energy saving and electricity saving, can use a low-grade heat source as original power to provide refrigeration, but has small refrigeration temperature difference in a hot water type lithium bromide absorption refrigeration unit, high manufacturing cost and low energy efficiency of a traditional circulation mode of a lithium bromide solution and refrigerant water, and has no market competitive advantage.
Disclosure of Invention
The invention aims to provide a double-effect double-energy water chilling unit to solve the problems in the prior art, and one unit can realize refrigeration by three heat sources of independent steam, independent hot water and steam heating water, so that the effect of large refrigeration temperature difference is realized.
In order to achieve the purpose, the invention provides the following scheme: the invention provides a double-effect double-energy water chilling unit which comprises a steam generator, a steam low-temperature generator, a low-pressure hot water generator, a high-pressure hot water generator, a condenser, an absorber, an evaporator, a solution pump and pipelines for connecting all the parts, wherein a connection refrigeration loop of all the parts is divided into a steam heat source loop, a hot water heat source loop and a steam and hot water heat source loop.
Further, the absorber comprises a low-pressure absorber and a high-pressure absorber which are connected in sequence, and the evaporator comprises a low-pressure evaporator and a high-pressure evaporator which are arranged corresponding to the absorber.
Further, when only a steam heat source exists, lithium bromide diluent is firstly generated into intermediate liquid in the steam low-temperature generator, the intermediate liquid enters the high-temperature solution through a solution pump for heat exchange, then enters the steam generator for further generation into concentrated solution, the concentrated solution enters the low-pressure absorber after the heat exchange with the intermediate liquid through the high-temperature solution, and then enters the high-pressure absorber after the heat exchange with the dilute solution through the low-temperature solution; the low-pressure absorber absorbs the refrigerant steam of the low-pressure evaporator, the high-pressure absorber absorbs the refrigerant steam of the high-pressure evaporator, and the cold water with large temperature difference is prepared by reducing the logarithmic temperature difference of the high-pressure evaporator and the low-pressure evaporator.
Further, when only a hot water heat source is available, a lithium bromide dilute solution is firstly generated into an intermediate liquid in the low-pressure hot water generator, the intermediate liquid flows into the high-pressure hot water generator, and then enters the low-pressure absorber after heat exchange with a dilute solution through low-temperature solution heat exchange, and then enters the high-pressure absorber; the low-pressure absorber absorbs the refrigerant steam of the low-pressure evaporator, the high-pressure absorber absorbs the refrigerant steam of the high-pressure evaporator, and the cold water with large temperature difference is prepared by reducing the logarithmic temperature difference of the high-pressure evaporator and the low-pressure evaporator.
Further, when steam and hot water are simultaneously used as heat sources, a lithium bromide dilute solution exchanges heat with steam condensate at a condensate heat exchange position, then enters the low-pressure hot water generator to generate secondary intermediate liquid, then enters the steam low-temperature generator to generate intermediate liquid, the intermediate liquid enters the high-temperature solution heat exchange through a solution pump to exchange heat, then enters the steam generator to further generate concentrated solution again, the concentrated solution exchanges heat with the intermediate liquid through the high-temperature solution heat exchange, then enters the low-pressure absorber after exchanging heat with the dilute solution through the low-temperature solution heat exchange, and then enters the high-pressure absorber; the low-pressure absorber absorbs the refrigerant steam of the low-pressure evaporator, the high-pressure absorber absorbs the refrigerant steam of the high-pressure evaporator, and the cold water with large temperature difference is prepared by reducing the logarithmic temperature difference of the high-pressure evaporator and the low-pressure evaporator.
Further, the condenser includes low pressure condenser and high pressure condenser, the low pressure condenser with low pressure hot water generator corresponds the setting, high pressure condenser with steam low temperature generator and high pressure hot water generator correspond the setting.
Compared with the prior art, the invention has the following technical effects:
the double-effect double-energy cold water unit is characterized in that a circulation mode when a lithium bromide absorption heat pump unit has an independent steam heat source, an independent hot water heat source and a primary steam and hot water heat source coexist and the temperature difference of cold water is large is utilized, different generation pressure areas are manufactured on a generator by changing the circulation mode of cooling water, lithium bromide solutions with different concentrations can generate under corresponding generation pressures, and the lithium bromide solutions absorb refrigerant steam of an evaporator in an absorber according to different evaporation temperatures of refrigerant water of the evaporator, so that the temperature of the refrigerant water is distinguished.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram of a double-effect double-energy water chilling unit;
wherein, 1, a steam generator; 2 a low-temperature steam generator; 3 low-temperature hot water generator; 4 high-temperature hot water generator; 5, a low-pressure condenser; 6, a high-pressure condenser; 7, a low-pressure evaporator; 8, a high-pressure evaporator; 9 a low pressure absorber; 10 a high pressure absorber; 11, heat exchange of the high-temperature solution; 12, heat exchange of the low-temperature solution; 13 condensing water for heat exchange; 14 solution pump one; 15 solution pump two; 16, a first stop valve; 17, a second stop valve; 18, a third stop valve; and 19, a fourth stop valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a double-effect double-energy water chilling unit to solve the problems in the prior art, and one unit can realize refrigeration by three heat sources of independent steam, independent hot water and steam heating water, so that the effect of large refrigeration temperature difference is realized.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1, the invention provides a double-effect dual-energy water chilling unit, which comprises a steam generator 1, a steam low-temperature generator 2, a low-temperature hot water generator 3, a high-temperature hot water generator 4, a low-pressure condenser 5, a high-pressure condenser 6, a low-pressure evaporator 7, a high-pressure evaporator 8, a low-pressure absorber 9, a high-pressure absorber 10, a high-temperature solution heat exchanger 11, a low-temperature solution heat exchanger 12, a condensed water heat exchanger 13, a solution pump I14, a solution pump II 15, a stop valve I16, a stop valve II 17, a stop valve III 18 and a stop valve IV 19.
The double-effect double-energy cold water unit is characterized in that a circulation mode when a lithium bromide absorption heat pump unit has an independent steam heat source, an independent hot water heat source and a primary steam and hot water heat source coexist and the temperature difference of cold water is large is utilized, different generation pressure areas are manufactured on a generator by changing the circulation mode of cooling water, lithium bromide solutions with different concentrations can generate under corresponding generation pressures, and the lithium bromide solutions absorb refrigerant steam of an evaporator in an absorber according to different evaporation temperatures of refrigerant water of the evaporator, so that the temperature of the refrigerant water is distinguished.
Specifically, when only a steam heat source exists, the first stop valve 16 and the third stop valve 18 are closed, the second stop valve 17 is opened, dilute solution is firstly generated into intermediate solution in the steam low-temperature generator 2, the intermediate solution passes through the first solution pump 14 and enters the high-temperature solution heat exchanger 11 to exchange heat, then enters the steam generator 1 to be further generated into concentrated solution again, the concentrated solution passes through the high-temperature solution heat exchanger 11 to exchange heat with the intermediate solution, passes through the second solution pump 15 and then enters the low-pressure absorber 9 at the low-temperature solution heat exchanger 12 to exchange heat with the dilute solution, refrigerant steam of the low-pressure evaporator 7 is absorbed, then enters the high-pressure absorber 10 to absorb refrigerant steam of the high-pressure evaporator 8, and cold water preparation with large temperature difference is achieved by reducing the logarithm of the high.
When only a hot water heat source exists, the first solution pump 14 is closed, the second stop valve 17 and the fourth stop valve 19 are closed, the first stop valve 16 and the third stop valve 18 are opened, dilute solution is firstly generated into intermediate solution in the low-pressure hot water generator 3, the intermediate solution flows into the high-pressure hot water generator 4, then the dilute solution exchanges heat with the dilute solution at the low-temperature solution heat exchange position 12 through the second solution pump 15 and enters the low-pressure absorber 9 to absorb refrigerant steam of the low-pressure evaporator 7, then the refrigerant steam enters the high-pressure absorber 10 to absorb refrigerant steam of the high-pressure evaporator 8, and cold water preparation with large temperature difference is achieved by reducing logarithmic temperature difference of the high-pressure evaporator and.
When steam and hot water are used as heat sources, the first solution pump 14 is started, the first stop valve 16 and the third stop valve 18 are closed, the second valve stop valve 17 and the fourth stop valve 19 are opened, dilute solution exchanges heat with steam condensate in the condensate heat exchange 13, then enters a low-pressure hot water generator 3 to generate secondary intermediate liquid, then enters a steam low-temperature generator 2 to generate intermediate liquid, the intermediate liquid enters a high-temperature solution heat exchanger 12 through a solution pump I14 to exchange heat, then enters a steam generator 1 to further generate concentrated solution again, the concentrated solution exchanges heat with the intermediate liquid through a high-temperature solution heat exchanger 11, then the mixed solution exchanges heat with dilute solution at the low-temperature solution heat exchange position 12 through a second solution pump 15, enters a low-pressure absorber 9 to absorb refrigerant steam of a low-pressure evaporator 7, enters a high-pressure absorber 10 to absorb refrigerant steam of a high-pressure evaporator 8, and realizes the preparation of cold water with large temperature difference by reducing the logarithmic temperature difference of the high-pressure and low-pressure evaporators.
In the double-effect double-energy water chilling unit, one unit can realize refrigeration by three heat sources of independent steam, independent hot water and independent steam and hot water; the refrigeration with large temperature difference of cold water can be realized, and the requirements of customers are met; the initial investment of a client can be reduced, one machine has multiple purposes, and the purpose of energy conservation is achieved.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (6)
1. The utility model provides a economic benefits and social benefits dual energy cooling water set which characterized in that: the system comprises a steam generator, a steam low-temperature generator, a low-pressure hot water generator, a high-pressure hot water generator, a condenser, an absorber, an evaporator, a solution pump and pipelines for connecting all the parts, wherein a connection refrigeration loop of all the parts is divided into a steam heat source loop, a hot water heat source loop and a steam and hot water heat source loop.
2. The double-effect double-energy water chilling unit of claim 1, wherein: the absorber comprises a low-pressure absorber and a high-pressure absorber which are connected in sequence, and the evaporator comprises a low-pressure evaporator and a high-pressure evaporator which are arranged corresponding to the absorber.
3. The dual effect dual energy chiller as set forth in claim 2 wherein: when only a steam heat source exists, lithium bromide diluent is firstly generated into intermediate liquid in the steam low-temperature generator, the intermediate liquid enters a high-temperature solution through a solution pump for heat exchange, then enters the steam generator for further generation into concentrated solution, the concentrated solution exchanges heat with the intermediate liquid through the high-temperature solution heat exchange, enters the low-pressure absorber after exchanging heat with the dilute solution through the low-temperature solution heat exchange, and then enters the high-pressure absorber; the low-pressure absorber absorbs the refrigerant steam of the low-pressure evaporator, the high-pressure absorber absorbs the refrigerant steam of the high-pressure evaporator, and the cold water with large temperature difference is prepared by reducing the logarithmic temperature difference of the high-pressure evaporator and the low-pressure evaporator.
4. The dual effect dual energy chiller as set forth in claim 2 wherein: when only a hot water heat source is available, the lithium bromide dilute solution is firstly generated into intermediate liquid in the low-pressure hot water generator, the intermediate liquid flows into the high-pressure hot water generator, and then enters the low-pressure absorber after heat exchange with the dilute solution through the low-temperature solution, and then enters the high-pressure absorber; the low-pressure absorber absorbs the refrigerant steam of the low-pressure evaporator, the high-pressure absorber absorbs the refrigerant steam of the high-pressure evaporator, and the cold water with large temperature difference is prepared by reducing the logarithmic temperature difference of the high-pressure evaporator and the low-pressure evaporator.
5. The dual effect dual energy chiller as set forth in claim 2 wherein: when steam and hot water are simultaneously used as heat sources, a lithium bromide dilute solution exchanges heat with steam condensate at a condensate heat exchange position, then enters a low-pressure hot water generator to generate secondary intermediate liquid, then enters a steam low-temperature generator to generate intermediate liquid, the intermediate liquid enters a high-temperature solution heat exchange through a solution pump to exchange heat, then enters the steam generator to further generate concentrated solution again, the concentrated solution exchanges heat with the intermediate liquid through the high-temperature solution heat exchange, then enters a low-pressure absorber after exchanging heat with a dilute solution through the low-temperature solution heat exchange, and then enters the high-pressure absorber; the low-pressure absorber absorbs the refrigerant steam of the low-pressure evaporator, the high-pressure absorber absorbs the refrigerant steam of the high-pressure evaporator, and the cold water with large temperature difference is prepared by reducing the logarithmic temperature difference of the high-pressure evaporator and the low-pressure evaporator.
6. The double-effect double-energy water chilling unit of claim 1, wherein: the condenser comprises a low-pressure condenser and a high-pressure condenser, the low-pressure condenser corresponds to the low-pressure hot water generator, and the high-pressure condenser corresponds to the steam low-temperature generator and the high-pressure hot water generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010009116.7A CN111174464A (en) | 2020-01-06 | 2020-01-06 | Double-effect double-energy water chilling unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010009116.7A CN111174464A (en) | 2020-01-06 | 2020-01-06 | Double-effect double-energy water chilling unit |
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| CN111174464A true CN111174464A (en) | 2020-05-19 |
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| CN202010009116.7A Pending CN111174464A (en) | 2020-01-06 | 2020-01-06 | Double-effect double-energy water chilling unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112268382A (en) * | 2020-11-18 | 2021-01-26 | 同方节能装备有限公司 | Novel large-temperature-difference heat exchange unit adopting circulation mode |
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| JP2000257976A (en) * | 1999-01-07 | 2000-09-22 | Kawasaki Thermal Engineering Co Ltd | Absorption refrigerating machine |
| JP2003075010A (en) * | 2001-09-05 | 2003-03-12 | Ebara Corp | Exhaust gas-driven absorption water cooling and warming machine |
| CN2916522Y (en) * | 2006-03-23 | 2007-06-27 | 大连三洋制冷有限公司 | Low-temperature-water direct-combustion single and double effect lithium bromide absorption cold and warm water machine |
| CN201255528Y (en) * | 2008-07-25 | 2009-06-10 | 北京环能瑞通科技发展有限公司 | Hot water type absorption heat pump unit |
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| CN201926190U (en) * | 2010-11-24 | 2011-08-10 | 乐金空调(山东)有限公司 | Low-temperature hot-water compound energy source double-effect lithium bromide absorption-type refrigerating unit |
| CN103075840A (en) * | 2013-01-22 | 2013-05-01 | 山东禄禧新能源科技有限公司 | Hot water and direct-fired dual-purpose lithium bromide absorption type machine set |
| CN104457014A (en) * | 2014-04-15 | 2015-03-25 | 同方川崎节能设备有限公司 | Dual-heat-source lithium bromide absorption type heat pump |
| CN107655235A (en) * | 2017-10-18 | 2018-02-02 | 双良节能***股份有限公司 | The segment type lithium bromide adsorption water chilling unit of hot water and steam economic benefits and social benefits two |
-
2020
- 2020-01-06 CN CN202010009116.7A patent/CN111174464A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000257976A (en) * | 1999-01-07 | 2000-09-22 | Kawasaki Thermal Engineering Co Ltd | Absorption refrigerating machine |
| JP2003075010A (en) * | 2001-09-05 | 2003-03-12 | Ebara Corp | Exhaust gas-driven absorption water cooling and warming machine |
| CN2916522Y (en) * | 2006-03-23 | 2007-06-27 | 大连三洋制冷有限公司 | Low-temperature-water direct-combustion single and double effect lithium bromide absorption cold and warm water machine |
| CN201255528Y (en) * | 2008-07-25 | 2009-06-10 | 北京环能瑞通科技发展有限公司 | Hot water type absorption heat pump unit |
| CN101666563A (en) * | 2009-09-11 | 2010-03-10 | 北京环能瑞通科技发展有限公司 | Multi-stage generation absorption heat pump and refrigerating machine set |
| CN201926190U (en) * | 2010-11-24 | 2011-08-10 | 乐金空调(山东)有限公司 | Low-temperature hot-water compound energy source double-effect lithium bromide absorption-type refrigerating unit |
| CN103075840A (en) * | 2013-01-22 | 2013-05-01 | 山东禄禧新能源科技有限公司 | Hot water and direct-fired dual-purpose lithium bromide absorption type machine set |
| CN104457014A (en) * | 2014-04-15 | 2015-03-25 | 同方川崎节能设备有限公司 | Dual-heat-source lithium bromide absorption type heat pump |
| CN107655235A (en) * | 2017-10-18 | 2018-02-02 | 双良节能***股份有限公司 | The segment type lithium bromide adsorption water chilling unit of hot water and steam economic benefits and social benefits two |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112268382A (en) * | 2020-11-18 | 2021-01-26 | 同方节能装备有限公司 | Novel large-temperature-difference heat exchange unit adopting circulation mode |
| CN112268382B (en) * | 2020-11-18 | 2024-04-30 | 同方节能装备有限公司 | Novel circulation mode large-temperature-difference heat exchanger unit |
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Application publication date: 20200519 |