CN201059819Y - Steam turbine driven open-type heat pump device - Google Patents
Steam turbine driven open-type heat pump device Download PDFInfo
- Publication number
- CN201059819Y CN201059819Y CNU2007201513698U CN200720151369U CN201059819Y CN 201059819 Y CN201059819 Y CN 201059819Y CN U2007201513698 U CNU2007201513698 U CN U2007201513698U CN 200720151369 U CN200720151369 U CN 200720151369U CN 201059819 Y CN201059819 Y CN 201059819Y
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- Prior art keywords
- compressor
- steam turbine
- heat pump
- type heat
- turbine driven
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances data:image/svg+xml;base64,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 data:image/svg+xml;base64,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 O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 239000003507 refrigerant Substances 0.000 claims abstract description 5
- 241001236653 Lavinia exilicauda Species 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 abstract description 9
- 230000001808 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 238000004064 recycling Methods 0.000 abstract 1
- 239000002918 waste heat Substances 0.000 abstract 1
- 238000007906 compression Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 201000009230 common cold Diseases 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 201000009240 nasopharyngitis Diseases 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
-
- 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
- Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
-
- 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]
- Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
Abstract
The utility model discloses a steam turbine driving opening type heat pump device, which comprises a refrigerant loop formed by an evaporator, a compressor, a condenser and an expanding valve which are connected end to end in sequence, and a power input source connected with the compressor, and the utility model is characterized in that the power input source connected with the compressor is a steam turbine. The compressor is an opening type compressor. The steam turbine is connected with the opening type compressor through a shaft coupling. The heat source of the evaporator is cooling circulating water in a power plant. The system adopts water vapor as the power source, and is mainly used for recycling the cooling circulating waste heat at 25 to 40 DEG C of power plants, finally can heat the boiler feed water to 40 to 70 DEG C, has very high energy utilization efficiency, and can be applied to the feed heating of the boiler of a power plant.
Description
Technical field
The utility model relates to a kind of heat pump, is Steam Turbine Driven open-type heat pump assembly.
Background technology
Can emit a large amount of low temperature exhaust heats in the cogeneration of heat and power process, meanwhile, in the production process of heat energy and electric power, also need the not too high heat energy of a large amount of grades, for example the heating process of boiler feedwater.If can the part low temperature exhaust heat of power plant condenser discharging be recycled by heat pump techniques, be applied to again after upgrading in the feedwater heating, then can save operating cost in a large number, reach the purpose of environmental protection simultaneously, and the form that adopts usually at present is: by the mode of common electronic compression heat pump, with the drive energy of electric energy as heat pump, compressor adopts open-type or semi-enclosed form, absorb the low-grade heat in the recirculated water, in the condenser of heat pump, finish heating process again to boiler feedwater, though this form has also been utilized the used heat in a large amount of recirculated waters, but drive energy comes from the electric energy that power plant self produces, improve the station service power consumption rate of power plant, consumed the product of self, be equivalent to reduce the generated energy of power plant; From the using energy source angle, the generating efficiency in power plant generally is no more than 40% simultaneously, though extracted the used heat in the recirculated water, the heat of still old about 2.5 times heat pump power consumption can't utilize, and finally dissipates in atmosphere by cooling tower.
The utility model content
For addressing the above problem, the utility model provides a kind of Steam Turbine Driven open-type heat pump assembly that adopts back yard industry Steam Turbine Driven opened compressor.
The technical scheme that this device adopted is as follows: comprise the refrigerant loop that is joined end to end in proper order and formed by evaporimeter, compressor, condenser, expansion valve, and the power input source that is connected with compressor, it is characterized in that the described power input source that is connected with compressor is a steam turbine.
Described compressor is an opened compressor.
Described steam turbine is connected by hitch bar with opened compressor.
The thermal source of described evaporimeter is power plant's cooling circulating water.
The cooling water that described condenser uses can be boiler feedwater.
The utility model is compared with existing technologies, has following beneficial effect: (1) efficiency of energy utilization height, energy-saving effect are remarkable, and the primary energy utilization ratio is than utilizing Steam Heating to promote 150% purely; (2) can fully recycle the heat energy that contains in the electric power plant circulating water, reduce the cooling tower circular flow, avoid natural thermal pollution; (3) owing to the efficiency of energy utilization height, so operating cost is lower, investment repayment speed is fast; (4) power resources facility is used this device in power plant, steam obtains easily; (5) safe and reliable, system is stable, does not have any potential safety hazard.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further details
Fig. 1 is the utility model system architecture schematic diagram
The specific embodiment
Steam Turbine Driven open-type heat pump assembly as shown in Figure 1 comprises the refrigerant loop that is joined end to end and formed by evaporimeter 1, opened compressor 2, condenser 3, expansion valve 4 orders, and the steam turbine 5 that is connected with opened compressor 2.Boiler provides overheated or saturated vapor, drag opened compressor 2 work by steam turbine 5, steam turbine 5 adopts transmission joint direct connection with opened compressor 2, the rotating speed of steam turbine 5 is to reach by the air inflow that control enters steam turbine 5, and steam can also enter other heating position and continues to utilize discharging the exhaust steam that forms behind the high-grade energy simultaneously.
For the outlet temperature that makes this heat pump assembly further improves, the working medium of heat pump no longer is confined to common cold-producing medium such as R22 and R134a etc., also can adopt special non-azeotropic or inferior azeotrope refrigerant, through facts have proved, adopt the heat pump of these working medium, leaving water temperature can reach more than 85 ℃, also has simultaneously than higher heating efficiency, therefore need select suitable cold-producing medium according to the temperature of electric power plant circulating water and the temperature that heats of requirement, to improve the Energy Efficiency Ratio of unit as much as possible.
During work, the low temperature and low pressure steam of evaporimeter 1 outlet is inhaled in the opened compressor 2, after in opened compressor 2, forming the gas of HTHP, enter in the condenser 3, here, be lower than the boiler feedwater heat release of condensation temperature to temperature after, become the liquid of HTHP, through after the throttling of expansion valve 4, become the vapour-liquid mixture of low-temp low-pressure, enter the heat that absorbs power plant's cooling circulating water in the evaporimeter 1 then, the gas that flashes to low-temp low-pressure again enters and finishes once circulation in the opened compressor 2.
Through calculating, adopt Steam Turbine Driven open-type heat pump assembly, can reach 2.5 with the contained whole heat energy of the steam Energy Efficiency Ratio that is radix and (feedwater is heated to 50 ℃ from 30 ℃, the electric power plant circulating water mean temperature is 30 ℃) more than, substantially exceeding steam directly heating or common electronic compression heat pump heating system, is a kind of energy saver very efficiently.
Claims (4)
1. Steam Turbine Driven open-type heat pump assembly, comprise the refrigerant loop that joins end to end and form by evaporimeter (1), compressor (2), condenser (3), expansion valve (4) order, and the power input source that is connected with compressor (2), it is characterized in that the described power input source that is connected with compressor (2) is steam turbine (5).
2. Steam Turbine Driven open-type heat pump assembly according to claim 1 is characterized in that: described compressor (2) is an opened compressor.
3. Steam Turbine Driven open-type heat pump assembly according to claim 1 is characterized in that: described steam turbine (5) is connected by hitch bar with opened compressor (2).
4. Steam Turbine Driven open-type heat pump assembly according to claim 1 is characterized in that: the thermal source of described evaporimeter (1) is power plant's cooling circulating water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201513698U CN201059819Y (en) | 2007-07-12 | 2007-07-12 | Steam turbine driven open-type heat pump device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201513698U CN201059819Y (en) | 2007-07-12 | 2007-07-12 | Steam turbine driven open-type heat pump device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201059819Y true CN201059819Y (en) | 2008-05-14 |
Family
ID=39408294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201513698U Expired - Fee Related CN201059819Y (en) | 2007-07-12 | 2007-07-12 | Steam turbine driven open-type heat pump device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201059819Y (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101839518A (en) * | 2010-04-29 | 2010-09-22 | 华北电力大学 | Central heating system and method for coupling circulating water heat pump of power plant with cogeneration |
| CN101852459A (en) * | 2010-04-30 | 2010-10-06 | 北京中科华誉能源技术发展有限责任公司 | System for improving efficiency of power plant by driving heat pump with steam extracted from extraction steam turbine |
| CN101865491A (en) * | 2010-06-23 | 2010-10-20 | 赵德明 | Method for realizing energy saving and emission reduction by utilizing waste heat in power plant circulating cooling water |
| CN101871674A (en) * | 2010-04-30 | 2010-10-27 | 北京中科华誉能源技术发展有限责任公司 | System for supplying heat by utilizing steam extracted from extraction steam turbine to drive heat pump |
| CN102305206A (en) * | 2011-03-30 | 2012-01-04 | 上海本家空调系统有限公司 | Compressor driven by heat energy |
| CN102519067A (en) * | 2011-12-21 | 2012-06-27 | 华北电力大学 | Heating energy saving device with additional back pressure generator for extraction condensing unit and heating energy saving method |
| CN102734980A (en) * | 2012-06-26 | 2012-10-17 | 山东科灵新能源发展有限公司 | Excess pressure and excess heat type water source heat pump system |
| CN103775140A (en) * | 2012-12-18 | 2014-05-07 | 苟仲武 | Improved electricity generation system with pump assisting in condensing and cooling and electricity generation method of electricity generation system |
| CN103775141A (en) * | 2012-12-18 | 2014-05-07 | 苟仲武 | Improved steam condensing type steam turbine electricity generation system with pump assisting in cooling and electricity generation method of electricity generation system |
| CN103806963A (en) * | 2012-12-17 | 2014-05-21 | 苟仲武 | Improved condensing type turbine generator and electricity generation method thereof |
| CN104567093A (en) * | 2014-12-26 | 2015-04-29 | 华电电力科学研究院 | Afterheat recycling method and device for steam driving type tandem type heat pumps |
| CN105492842A (en) * | 2013-06-24 | 2016-04-13 | Lg化学株式会社 | Heat recovery apparatus |
| CN105928230A (en) * | 2016-05-18 | 2016-09-07 | 张育仁 | Interior source and exterior source combination type temperature difference hybrid-power refrigeration device |
| CN110966798A (en) * | 2019-12-20 | 2020-04-07 | 上海核工程研究设计院有限公司 | Novel power plant energy comprehensive utilization non-temperature drainage thermodynamic system |
| CN111811291A (en) * | 2020-07-10 | 2020-10-23 | 浙江浙能技术研究院有限公司 | Closed circulation cooling method of cogeneration unit |
-
2007
- 2007-07-12 CN CNU2007201513698U patent/CN201059819Y/en not_active Expired - Fee Related
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101839518A (en) * | 2010-04-29 | 2010-09-22 | 华北电力大学 | Central heating system and method for coupling circulating water heat pump of power plant with cogeneration |
| CN101839518B (en) * | 2010-04-29 | 2014-12-03 | 华北电力大学 | Central heating system and method for coupling circulating water heat pump of power plant with cogeneration |
| CN101852459A (en) * | 2010-04-30 | 2010-10-06 | 北京中科华誉能源技术发展有限责任公司 | System for improving efficiency of power plant by driving heat pump with steam extracted from extraction steam turbine |
| CN101871674A (en) * | 2010-04-30 | 2010-10-27 | 北京中科华誉能源技术发展有限责任公司 | System for supplying heat by utilizing steam extracted from extraction steam turbine to drive heat pump |
| CN101865491A (en) * | 2010-06-23 | 2010-10-20 | 赵德明 | Method for realizing energy saving and emission reduction by utilizing waste heat in power plant circulating cooling water |
| CN102305206A (en) * | 2011-03-30 | 2012-01-04 | 上海本家空调系统有限公司 | Compressor driven by heat energy |
| CN102519067B (en) * | 2011-12-21 | 2013-11-06 | 华北电力大学 | Heating energy saving device with additional back pressure generator for extraction condensing unit and heating energy saving method |
| CN102519067A (en) * | 2011-12-21 | 2012-06-27 | 华北电力大学 | Heating energy saving device with additional back pressure generator for extraction condensing unit and heating energy saving method |
| CN102734980A (en) * | 2012-06-26 | 2012-10-17 | 山东科灵新能源发展有限公司 | Excess pressure and excess heat type water source heat pump system |
| CN103806963B (en) * | 2012-12-17 | 2015-11-04 | 苟仲武 | Modified model condensing steam turbine generator and electricity-generating method thereof |
| CN103806963A (en) * | 2012-12-17 | 2014-05-21 | 苟仲武 | Improved condensing type turbine generator and electricity generation method thereof |
| CN103775140A (en) * | 2012-12-18 | 2014-05-07 | 苟仲武 | Improved electricity generation system with pump assisting in condensing and cooling and electricity generation method of electricity generation system |
| CN103775141A (en) * | 2012-12-18 | 2014-05-07 | 苟仲武 | Improved steam condensing type steam turbine electricity generation system with pump assisting in cooling and electricity generation method of electricity generation system |
| CN105492842A (en) * | 2013-06-24 | 2016-04-13 | Lg化学株式会社 | Heat recovery apparatus |
| US9612045B2 (en) | 2013-06-24 | 2017-04-04 | Lg Chem, Ltd. | Heat recovery apparatus |
| CN104567093A (en) * | 2014-12-26 | 2015-04-29 | 华电电力科学研究院 | Afterheat recycling method and device for steam driving type tandem type heat pumps |
| CN105928230A (en) * | 2016-05-18 | 2016-09-07 | 张育仁 | Interior source and exterior source combination type temperature difference hybrid-power refrigeration device |
| CN110966798A (en) * | 2019-12-20 | 2020-04-07 | 上海核工程研究设计院有限公司 | Novel power plant energy comprehensive utilization non-temperature drainage thermodynamic system |
| CN111811291A (en) * | 2020-07-10 | 2020-10-23 | 浙江浙能技术研究院有限公司 | Closed circulation cooling method of cogeneration unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| C14 | Grant of patent or utility model | ||
| CP03 | Change of name, title or address |
Address after: 000000 Beijing Men Wai Avenue Chaoyang District Huapu International Building room 1226 No. 19 Patentee after: Beijing Energy Efficiency Technical Co., Ltd. Address before: 000000 Beijing city Chaoyang District Wai Avenue No. 19 Huapu International Building 1110A Patentee before: Beijing Kaiyuan Mingdian Technology Co., Ltd. |
|
| C56 | Change in the name or address of the patentee |
Owner name: BEIJING ENERGY EFFICIENCY TECHNICAL CO., LTD. Free format text: FORMER NAME: BEIJING KAIYUAN MINGDIAN TECHNOLOGY CO., LTD. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080514 Termination date: 20140712 |
|
| EXPY | Termination of patent right or utility model |