CN111336572A - Low-temperature hot water driven absorption type large-temperature-difference heat exchange unit - Google Patents
Low-temperature hot water driven absorption type large-temperature-difference heat exchange unit Download PDFInfo
- Publication number
- CN111336572A CN111336572A CN201910810917.0A CN201910810917A CN111336572A CN 111336572 A CN111336572 A CN 111336572A CN 201910810917 A CN201910810917 A CN 201910810917A CN 111336572 A CN111336572 A CN 111336572A
- Authority
- CN
- China
- Prior art keywords
- temperature
- low
- water
- generator
- pressure absorber
- 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.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 63
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 13
- 239000006096 absorbing agent Substances 0.000 claims abstract description 34
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 6
- 239000003507 refrigerant Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 abstract description 16
- 238000001816 cooling Methods 0.000 description 2
- 239000008400 supply water Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/18—Hot-water central heating systems using heat pumps
-
- 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
- F25B27/00—Machines, plants or systems, using particular sources of energy
-
- 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
- F25B35/00—Boiler-absorbers, i.e. boilers usable for absorption or adsorption
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2200/00—Heat sources or energy sources
- F24D2200/12—Heat pump
- F24D2200/126—Absorption type heat pumps
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Sorption Type Refrigeration Machines (AREA)
Abstract
An absorption type large-temperature-difference heat exchange unit driven by low-temperature hot water relates to the technical field of heating equipment. The invention comprises a generator, a condenser, a low-pressure absorber, an evaporator, a high-pressure absorber, a high-temperature generator and a water-plate heat exchanger. The structure is characterized in that the low-pressure absorber and the evaporator form a low-pressure cylinder, the high-pressure absorber and the high-temperature generator form a medium-pressure cylinder, and the generator and the condenser form a high-pressure cylinder. Its circulating system is divided into external pressurized water channel and internal vacuum loop. Compared with the prior art, the invention can normally operate when the driving heat source temperature is 55-80 ℃, and can effectively reduce the return water temperature of the heat supply network, increase the supply and return water temperature difference of primary side hot water and increase the conveying capacity of the heat supply network.
Description
Technical Field
The invention relates to the technical field of heating equipment, in particular to an absorption heat exchange unit for heating, which can be applied to occasions with low hot water quality, such as a secondary station for central heating, solar hot water utilization, steam condensate deep utilization and the like.
Background
With the increase of the scale of urban centralized heat supply year by year, high-temperature hot water generated by a centralized heat source can reach a heat supply area only by being conveyed for a long distance, and under the condition of the same heat supply amount, the temperature difference between water supply and return water is increased to reduce the water supply flow, so that the initial investment of a pipeline is reduced. Meanwhile, the power consumption of the water pump can be reduced, so that the heat supply energy consumption and the heat supply cost can be reduced.
In the prior art, Chinese patent 'a heat pump type heat exchange unit' proposes that the supply and return water temperature of hot water of a centralized heat supply primary network is generally about 130-60 ℃, and in the embodiment, the supply and return water temperature of the primary network is 130-25 ℃, and the supply and return water temperature difference reaches 105 ℃. In most areas of urban central heating at present, the temperature of primary network water supply is not up to 130 ℃, and particularly in the early and late stages of heating, the temperature of primary network water supply is basically only 60-80 ℃. In some district heating areas, the temperature of the primary network supply water running all year round is 55-80 ℃. At the moment, due to the working characteristics of the conventional absorption heat exchanger unit, the temperature of a driving heat source is reduced, so that the return water temperature of the primary network is higher than 25 ℃, and even the unit cannot operate. Therefore, when the temperature of the primary network supply water is low in practical application, the absorption heat exchanger unit is not suitable for the type.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an absorption type large-temperature-difference heat exchange unit driven by low-temperature hot water. The water heater can normally operate when the temperature of a driving heat source is 55-80 ℃, and can effectively reduce the temperature of return water of a heat supply network, increase the temperature difference of supply and return water of hot water at the primary side and increase the conveying capacity of the heat supply network.
In order to achieve the above object, the technical solution of the present invention is implemented as follows:
an absorption type large-temperature-difference heat exchange unit driven by low-temperature hot water comprises a generator, a condenser, a low-pressure absorber, an evaporator, a high-pressure absorber, a high-temperature generator and a water-water plate type heat exchanger. The structure is characterized in that the low-pressure absorber and the evaporator form a low-pressure cylinder, the high-pressure absorber and the high-temperature generator form a medium-pressure cylinder, and the generator and the condenser form a high-pressure cylinder. Its circulating system is divided into external pressurized water channel and internal vacuum loop. The external pressurized water path is divided into a primary network water path and a secondary network water path, and the primary network water path sequentially passes through the high-temperature generator, the water-water plate type heat exchanger and the evaporator; the secondary network water path is connected in parallel with two paths, one path sequentially passes through the low-pressure absorber, the high-pressure absorber and the condenser, the other path passes through the water-plate type heat exchanger, and the two paths are mixed and then flow out of the unit. The internal loop is divided into a solution loop and a refrigerant loop, the solution loop is divided into two independent paths, one path of solution sequentially passes through the low-pressure absorber and the high-temperature generator and then returns to the low-pressure absorber, and the circulation is repeated; the other path of solution passes through the high-pressure absorber and the generator in sequence and then returns to the high-pressure absorber to circulate. The refrigerant circuit is from the condenser to the evaporator.
In the absorption type large temperature difference heat exchange unit driven by the low-temperature hot water, the low-pressure cylinder and the middle-pressure cylinder are separately arranged or integrally arranged.
By adopting the structure, the three cylinders form three different pressures, and the three pressures bring sectional temperature reduction/temperature rise, so that the temperature difference of supply and return water of primary side hot water in a centralized heating system can be obviously increased, the temperature of return water of a heat supply network is reduced, and the conveying capacity of the heat supply network is increased. The invention reduces the temperature of the heat supply return water, and the return water pipeline has no problems of heat preservation and thermal stress compensation, thus reducing the investment of the return water pipe network and the whole pipe network.
The invention is further described with reference to the following figures and detailed description.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Detailed Description
Referring to fig. 1, the low-temperature hot water driven absorption type large temperature difference heat exchanger unit comprises a generator G2, a condenser C, a low-pressure absorber a, an evaporator E, a high-pressure absorber a2, a high-temperature generator G and a water-plate heat exchanger w.hex. The low-pressure absorber A and the evaporator E form a low-pressure cylinder, the high-pressure absorber A2 and the high-temperature generator G form a medium-pressure cylinder, the generator G2 and the condenser C form a high-pressure cylinder, and the low-pressure cylinder and the medium-pressure cylinder are separately or integrally arranged. The circulating system of the unit is divided into an external pressurized waterway and an internal vacuum loop. The external pressurized water path is divided into a primary network water path and a secondary network water path, and the primary network water path sequentially passes through a high-temperature generator G, a generator G2, a water-water plate heat exchanger W.HEX and an evaporator E; the secondary network water path is connected in parallel with two paths, one path sequentially passes through the low-pressure absorber A, the high-pressure absorber A2 and the condenser C, the other path passes through the water-water plate type heat exchanger W.HEX, and the two paths are mixed and then flow out of the unit. The internal circuit is divided into a solution circuit and a refrigerant circuit. The solution loop is divided into two independent paths, one path of solution sequentially passes through the low-pressure absorber A and the high-temperature generator G and then returns to the low-pressure absorber A, and the circulation is repeated; the other path of solution passes through a high-pressure absorber A2 and a generator G2 in sequence and then returns to the high-pressure absorber A2 to circulate. The refrigerant circuit is from the condenser C to the evaporator E.
The invention provides a solution for gradient utilization of medium and low temperature energy of central heating hot water, and can provide heating or domestic hot water. When the central heating hot water cooling system works, the central heating hot water sequentially passes through the four stages of cooling of the high-temperature generator G, the generator G2, the water-plate heat exchanger W.HEX and the evaporator E, so that the return water temperature of the central heating hot water is greatly reduced. Due to the special structures of the medium-pressure cylinder and the high-pressure cylinder, the available temperature of the driving hot water is between 55 and 80 ℃.
The structure of the invention is particularly suitable for areas and occasions with low temperature of primary side water supply, and the equipment can be effectively utilized even in the early and late stages of heating. Compared with the traditional plate type heat exchange unit, the primary side return water temperature is lower and lower than the secondary side return water temperature, so that conditions are created for a heat source plant to recover low-grade heat energy, and the comprehensive energy utilization efficiency of the system is improved. In addition, for some areas, the temperature condition of central heating hot water is low, the absorption heat exchanger unit can be considered to be improved, and the absorption heat exchanger unit has good adaptability to the initial stage and the final stage of heating.
Claims (2)
1. An absorption type large-temperature-difference heat exchange unit driven by low-temperature hot water comprises a generator (G2), a condenser (C), a low-pressure absorber (A), an evaporator (E), a high-pressure absorber (A2), a high-temperature generator (G) and a water-plate heat exchanger (W.HEX); the low-pressure absorber (A) and the evaporator (E) form a low-pressure cylinder, the high-pressure absorber (A2) and the high-temperature generator (G) form a medium-pressure cylinder, and the generator (G2) and the condenser (C) form a high-pressure cylinder; the circulating system of the system is divided into an external pressurized water path and an internal vacuum loop, the external pressurized water path is divided into a primary network water path and a secondary network water path, and the primary network water path sequentially passes through a high-temperature generator (G), a generator (G2), a water-water plate heat exchanger (W.HEX) and an evaporator (E); the secondary network water path is connected in parallel with two paths, one path sequentially passes through a low-pressure absorber (A), a high-pressure absorber (A2) and a condenser (C), the other path passes through a water-water plate type heat exchanger (W.HEX), and the two paths are mixed and then flow out of the unit; the internal loop is divided into a solution loop and a refrigerant loop, the solution loop is divided into two independent paths, one path of solution sequentially passes through the low-pressure absorber (A) and the high-temperature generator (G) and then returns to the low-pressure absorber (A), and the circulation is repeated; the other path of solution passes through a high-pressure absorber (A2) and a generator (G2) in sequence and then returns to the high-pressure absorber (A2) to circulate; the refrigerant circuit is from the condenser (C) to the evaporator (E).
2. The low-temperature hot-water-driven absorption-type large-temperature-difference heat exchanger unit according to claim 1, wherein the low-pressure cylinder and the intermediate-pressure cylinder are arranged separately or integrally.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910810917.0A CN111336572A (en) | 2019-08-30 | 2019-08-30 | Low-temperature hot water driven absorption type large-temperature-difference heat exchange unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910810917.0A CN111336572A (en) | 2019-08-30 | 2019-08-30 | Low-temperature hot water driven absorption type large-temperature-difference heat exchange unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111336572A true CN111336572A (en) | 2020-06-26 |
Family
ID=71179545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910810917.0A Pending CN111336572A (en) | 2019-08-30 | 2019-08-30 | Low-temperature hot water driven absorption type large-temperature-difference heat exchange unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111336572A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101329117A (en) * | 2008-07-23 | 2008-12-24 | 北京环能瑞通科技发展有限公司 | Integral type absorption type heat exchange machine unit |
| KR20130036816A (en) * | 2011-10-05 | 2013-04-15 | 지에스파워주식회사 | Providing system for district heating using big temperature difference |
| CN203940503U (en) * | 2014-03-01 | 2014-11-12 | 双良节能系统股份有限公司 | Suction-type lithium bromide heat-exchange system with afterburning |
| CN204693556U (en) * | 2015-04-24 | 2015-10-07 | 珠海格力电器股份有限公司 | Absorption heat pump type heat exchanger unit |
| CN105276653A (en) * | 2015-11-25 | 2016-01-27 | 北京市煤气热力工程设计院有限公司 | Heat exchange unit and method for integrating absorption heat pump and electric heat pump |
| CN108534570A (en) * | 2018-05-28 | 2018-09-14 | 同方节能工程技术有限公司 | A kind of absorption big temperature difference heat-exchange unit |
| CN210717774U (en) * | 2019-08-30 | 2020-06-09 | 同方节能工程技术有限公司 | Low-temperature hot water driven absorption type large-temperature-difference heat exchange unit |
-
2019
- 2019-08-30 CN CN201910810917.0A patent/CN111336572A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101329117A (en) * | 2008-07-23 | 2008-12-24 | 北京环能瑞通科技发展有限公司 | Integral type absorption type heat exchange machine unit |
| KR20130036816A (en) * | 2011-10-05 | 2013-04-15 | 지에스파워주식회사 | Providing system for district heating using big temperature difference |
| CN203940503U (en) * | 2014-03-01 | 2014-11-12 | 双良节能系统股份有限公司 | Suction-type lithium bromide heat-exchange system with afterburning |
| CN204693556U (en) * | 2015-04-24 | 2015-10-07 | 珠海格力电器股份有限公司 | Absorption heat pump type heat exchanger unit |
| CN105276653A (en) * | 2015-11-25 | 2016-01-27 | 北京市煤气热力工程设计院有限公司 | Heat exchange unit and method for integrating absorption heat pump and electric heat pump |
| CN108534570A (en) * | 2018-05-28 | 2018-09-14 | 同方节能工程技术有限公司 | A kind of absorption big temperature difference heat-exchange unit |
| CN210717774U (en) * | 2019-08-30 | 2020-06-09 | 同方节能工程技术有限公司 | Low-temperature hot water driven absorption type large-temperature-difference heat exchange unit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204301176U (en) | Reduce the energy-saving heating system of heat supply return water temperature and recovery city used heat | |
| CN106705185A (en) | Energy-saving heat supply system with function of reducing temperature of heat supply return water | |
| CN106765448A (en) | A kind of energy-saving heating system for reducing heat supply return water temperature | |
| CN102278786B (en) | Central heating system using waste heat of direct air cooling power plant | |
| CN110542241B (en) | Single-double effect composite steam-absorption two-section type first lithium bromide absorption heat pump unit | |
| CN109489101B (en) | Central heating system and central heating method thereof | |
| CN207849525U (en) | A kind of increasing steam turbine steam exhaust recycling and full hydro-thermal pump combining heating system | |
| CN201672587U (en) | Heating system of heat pump coupled heat-power cogeneration | |
| CN210717774U (en) | Low-temperature hot water driven absorption type large-temperature-difference heat exchange unit | |
| CN110542239B (en) | Single-double effect composite steaming and sucking two-section direct combustion type first lithium bromide absorption heat pump unit | |
| CN101806448B (en) | Application of second type absorption type heat pump in heat exchange cycle system of power plant | |
| CN108534570B (en) | Absorption type large-temperature-difference heat exchanger unit | |
| CN106440469B (en) | Combined heat and power system | |
| CN110542238B (en) | Single-effect and double-effect composite direct-fired first-class lithium bromide absorption heat pump unit | |
| CN108131709A (en) | A kind of increasing steam turbine steam exhaust recycling pumps combining heating system with full hydro-thermal | |
| CN107270373A (en) | One kind is classified cascade utilization heating system of drawing gas | |
| CN207230694U (en) | A kind of extraction steam for factories cascade utilization heating system | |
| CN111336572A (en) | Low-temperature hot water driven absorption type large-temperature-difference heat exchange unit | |
| CN210717773U (en) | Novel absorption type large-temperature-difference heat exchange unit | |
| CN209840233U (en) | Air cooling high back pressure unit utilizes low level can heat supply refrigeration combined system | |
| CN107166480A (en) | Nuclear power plant's heating plant heat-exchange system | |
| CN112283697A (en) | Direct air cooling unit cold end exhaust steam waste heat utilization system combined with absorption heat pump | |
| CN108194155B (en) | System for improving summer operation vacuum of heat supply unit | |
| CN112432219A (en) | Double-cold-source efficient heating system suitable for large four-exhaust steam turbine unit | |
| CN106524560B (en) | Combined heat and power system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |