CN104676946A - Two-stage ejection heat exchange unit and operating mode thereof - Google Patents

Two-stage ejection heat exchange unit and operating mode thereof Download PDF

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Publication number
CN104676946A
CN104676946A CN201510056403.2A CN201510056403A CN104676946A CN 104676946 A CN104676946 A CN 104676946A CN 201510056403 A CN201510056403 A CN 201510056403A CN 104676946 A CN104676946 A CN 104676946A
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China
Prior art keywords
pressure
low
condenser
heat source
evaporator
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CN201510056403.2A
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Chinese (zh)
Inventor
高岩
程博
胡文举
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Beijing University of Civil Engineering and Architecture
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Beijing University of Civil Engineering and Architecture
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Priority to CN201510056403.2A priority Critical patent/CN104676946A/en
Publication of CN104676946A publication Critical patent/CN104676946A/en
Pending legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B19/00Machines, plant, or systems, using evaporation of a refrigerant but without recovery of the vapour
    • F25B19/02Machines, plant, or systems, using evaporation of a refrigerant but without recovery of the vapour using fluid jet, e.g. of steam

Abstract

The invention belongs to the technical field of energy sources and particularly relates to a two-stage ejection heat exchange unit and an operating mode thereof. The two-stage ejection heat exchange unit comprises a high pressure generator, a low pressure generator, a high pressure ejector, a low pressure ejector, a high pressure evaporator, a low pressure evaporator, a high pressure condenser, a low pressure condenser, a high pressure liquid storage, a low pressure liquid storage, a throttle valve and a coolant pump. A high-temperature heat source flows by the high pressure generator, the low pressure generator, the high pressure evaporator and the low pressure evaporator in a two-stage ejection heat pump and cools step by step; a low-temperature heat source sequentially flows by the low pressure condenser and the high pressure condenser in the two-stage ejection heat pump and heats up step by step; thus, the principle of 'parallel temperature and step utilization' is achieved, the heat exchange efficiency of the whole unit is greatly improved, and cyclic pump power and throttle loss of the whole unit is reduced.

Description

A kind of two-stage jetting type heat exchange unit and working method thereof
Technical field
The invention belongs to energy technology field, particularly relate to a kind of two-stage jetting type heat exchange unit and working method thereof.
Background technology
The heat exchange driving force of traditional heat exchangers is the heat transfer temperature difference between high/low temperature thermal source, even so the best counter-flow heat exchanger of heat transfer effect, the outlet temperature of high temperature heat source also must higher than the inlet temperature of low-temperature heat source.From the second law of thermodynamics, the entropy of traditional heat exchangers produces greatly, and the acting ability of high temperature heat source has been slatterned in vain, causes the heat exchange efficiency of traditional heat exchangers lower.
From increasing heat supply hot conveying capacity of pipe network, the angle reducing a heat supply pipe network return water temperature is set out, and Tsing-Hua University pays in the patent (200820079020.2) that Lin Qi declares the large temperature difference heat-exchange unit proposed based on absorption heat pump.But in this patent, because absorption type heat pump volume is comparatively large, apparatus expensive, operation complexity, the practical application of this heat-exchange unit receives great limitation.In view of the above-mentioned defect of absorption heat pump, in the patent (201210041639.5) that the Sun Fangtian of Beijing Inst. of Civil Engineering & Arch declares at it, propose the heat-exchange unit based on jet type heat pump.Although the structure of jet type heat pump is simple, system initial cost is lower, but it still continues to use the method being strengthened the heat pump high-low-position thermal source temperature difference by water water-to-water heat exchanger, and the secondary network hot water of the secondary network hot water and water outlet water-to-water heat exchanger that go out heat pump condenser directly carries out mixed heat transfer, system heat exchange efficiency is still not high.
How more simply to carry out heat exchange efficiently, reduce the outlet temperature of high temperature heat source, economical and efficient ground improves the heat exchange efficiency of heat exchanger, is current energy technology field technical barrier anxious to be resolved always.
Summary of the invention
For the problems referred to above, the present invention proposes a kind of two-stage jetting type heat exchange unit and working method thereof.
A kind of two-stage jetting type heat exchange unit, comprising: high pressure generator, low pressure generator, high-pressure injector, low pressure ejector will, high pressure evaporator, low pressure evaporator, high pressure condenser, low-pressure condenser, high-pressure reservoir, low-pressure oil storage, choke valve, cryogenic fluid pump;
Wherein, high temperature heat source import is connected with high pressure generator, high pressure generator, low pressure generator, high-pressure injector, low pressure ejector will are connected with high temperature heat source by high temperature heat source main line successively, high pressure generator steam (vapor) outlet is connected with high-pressure injector main jet entrance, high-pressure injector outlet is connected with high pressure condenser entrance, high pressure condenser outlet is connected with high-pressure reservoir entrance, high-pressure reservoir outlet is divided into two-way: cryogenic fluid pump of leading up to is connected with high pressure generator entrance, and another road is connected with low pressure generator entrance;
Low pressure generator steam (vapor) outlet is connected with low pressure ejector will main jet entrance, low pressure ejector will outlet is connected with low-pressure condenser entrance, low-pressure condenser outlet is connected with low-pressure oil storage entrance, low-pressure oil storage outlet is divided into two-way: a road is connected with high pressure evaporator entrance, and choke valve of separately leading up to is connected with low pressure evaporator;
High pressure evaporator outlet is connected with the receiving chamber of high-pressure injector, and low pressure evaporator outlet is connected with the receiving chamber of low pressure ejector will;
Low-temperature heat source import is connected with low-pressure condenser, and low-pressure condenser, high pressure condenser are connected with low-temperature heat source by low-temperature heat source main line successively.
A kind of working method of two-stage jetting type heat exchange unit, comprise: high temperature heat source flows through high pressure generator successively, low pressure generator, high pressure evaporator, low pressure evaporator are lowered the temperature step by step, under corresponding temperature conditions, produce the refrigerant vapour of different temperatures pressure successively;
The HTHP refrigerant vapour of low pressure generator steam (vapor) outlet is by the low-temp low-pressure refrigerant vapour of low pressure ejector will injection from low pressure evaporator, after in low pressure ejector will, fully mixing is pressurizeed, form the refrigerant vapour of medium temperature pressure, then condensation heat release in low-pressure condenser, heating low-temperature heat source;
The refrigerant vapour of medium temperature pressure is in low-pressure condenser after condensation, forming low pressure cryogen liquid is stored in low-pressure oil storage, then two-way is divided into: a road directly enters in high pressure evaporator and absorbs high temperature heat source heat and evaporate, step-down throttling is carried out through choke valve in another road, then enters in low pressure evaporator to absorb high temperature heat source heat and evaporate;
The HTHP refrigerant vapour of high pressure generator steam (vapor) outlet is by the low-temp low-pressure refrigerant vapour of high-pressure injector injection from high pressure evaporator, after in high-pressure injector, fully mixing is pressurizeed, form the refrigerant vapour of medium temperature pressure, then condensation heat release in high pressure condenser, heats the low-temperature heat source low-pressure condenser;
The refrigerant vapour of medium temperature pressure is in high pressure condenser after condensation, forming high pressure cryogen liquid is stored in high-pressure reservoir, but after be divided into two-way: a road directly enters in low pressure generator and absorbs high temperature heat source heat and evaporate, another road, after cryogenic fluid pump pressurization, enters in high pressure generator and absorbs high temperature heat source heat and evaporate;
Corresponding low-temperature heat source flows through low-pressure condenser, high pressure condenser successively, realizes the stepped heating of low-temperature heat source.
Beneficial effect of the present invention is: high temperature heat source flows through high pressure generator, low pressure generator, high pressure evaporator, the low pressure evaporator of two-stage jet type heat pump successively, lowers the temperature step by step; Low-temperature heat source flows through low-pressure condenser and the high pressure condenser of two-stage jet type heat pump successively, heats up step by step; Meanwhile, other forms of thermal source, also according to its temperature range, can access in the generator in relevant temperature interval, evaporimeter, condenser.
By the heat release cooling of high temperature heat source in low pressure generator, increase the temperature difference between high pressure generator and high pressure evaporator, make high-pressure injection formula heat pump be able to normal operation.By the heat release cooling of high temperature heat source in high pressure evaporator, increase the temperature difference between low pressure generator and low pressure evaporator, make low-pressure fuel injection formula heat pump be able to normal operation; Achieve " temperature counterpart, cascade utilization " principle, low-temperature heat source flows through low-pressure condenser and the high pressure condenser of two-stage jet type heat pump successively, heats up step by step, and the heat exchange efficiency of whole heat-exchange unit obtains and greatly promotes; High pressure cryogen liquid in high-pressure reservoir flows directly in low pressure generator and carries out evaporation endothermic, and the low pressure cryogen liquid in low-pressure oil storage flows directly in high pressure evaporator and carries out evaporation endothermic; Simultaneously, high pressure cryogen liquid in high-pressure reservoir enters evaporation endothermic in high pressure generator after cryogenic fluid pump pressurization, low pressure cryogen liquid in low-pressure oil storage enters evaporation endothermic in low pressure evaporator after choke valve step-down throttling, reduces circulating pump merit and the restriction loss of whole heat-exchange unit.
Accompanying drawing explanation
Fig. 1 is basic principle schematic of the present invention,
Wherein, Hin-high temperature heat source import; Hout-high temperature heat source exports; The import of Lin-low-temperature heat source; Lout-low-temperature heat source exports; E1-low pressure evaporator; E2-high pressure evaporator; G1-low pressure generator; G2-high pressure generator; C1-low-pressure condenser; C2-high pressure condenser; RT1-low-pressure oil storage; RT2-high-pressure reservoir; EJ1-low pressure ejector will; EJ2-high-pressure injector; TV-choke valve; RP-cryogenic fluid pump.
Detailed description of the invention
Below in conjunction with accompanying drawing, preferred embodiment is elaborated.
A kind of two-stage jetting type heat exchange unit, as shown in Figure 1, high temperature heat source flows through high pressure generator G2, low pressure generator G1 successively, high pressure evaporator E2, low pressure evaporator E1 lower the temperature step by step, under corresponding temperature conditions, produces the refrigerant vapour of different temperatures pressure successively.
The HTHP refrigerant vapour that low pressure generator G1 exports is by the low-temp low-pressure refrigerant vapour of low pressure ejector will EJ1 injection from low pressure evaporator E1, after in low pressure ejector will EJ1, fully mixing is pressurizeed, form the refrigerant vapour of medium temperature pressure, then condensation heat release in low-pressure condenser C1, heating low-temperature heat source.
The refrigerant vapour of medium temperature pressure after condensation, forms low pressure cryogen liquid and is stored in low-pressure oil storage RT1 in low-pressure condenser C1.Then be divided into two-way, a road directly enters in high pressure evaporator E2 and absorbs high temperature heat source heat and evaporate, and step-down throttling is carried out through choke valve TV in a road, then enters in low pressure evaporator E1 to absorb high temperature heat source heat and evaporate.
In like manner, the HTHP refrigerant vapour that high pressure generator G2 exports is by the low-temp low-pressure refrigerant vapour of high-pressure injector EJ2 injection from high pressure evaporator E2, after in high-pressure injector EJ2, fully mixing is pressurizeed, form the refrigerant vapour of medium temperature pressure, then condensation heat release in high pressure condenser C2, heats the low-temperature heat source low-pressure condenser C1.
The refrigerant vapour of medium temperature pressure after condensation, forms high pressure cryogen liquid and is stored in high-pressure reservoir RT2 in high pressure condenser C2.Then be divided into two-way, a road directly enters in low pressure generator G1 and absorbs high temperature heat source heat and evaporate, and a road, after cryogenic fluid pump RP pressurizes, enters in high pressure generator G2 and absorbs high temperature heat source heat and evaporate.
Corresponding low-temperature heat source flows through low-pressure condenser C1, high pressure condenser C2 successively, and realize the stepped heating of low-temperature heat source, principle that this heating process meets completely " temperature counterpart, cascade utilization ", drastically increases the heat exchange efficiency of heat-exchange unit.
The above; be only the present invention's preferably detailed description of the invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.

Claims (2)

1. a two-stage jetting type heat exchange unit, it is characterized in that, comprising: high pressure generator, low pressure generator, high-pressure injector, low pressure ejector will, high pressure evaporator, low pressure evaporator, high pressure condenser, low-pressure condenser, high-pressure reservoir, low-pressure oil storage, choke valve, cryogenic fluid pump;
Wherein, high temperature heat source import is connected with high pressure generator, high pressure generator, low pressure generator, high-pressure injector, low pressure ejector will are connected with high temperature heat source by high temperature heat source main line successively, high pressure generator steam (vapor) outlet is connected with high-pressure injector main jet entrance, high-pressure injector outlet is connected with high pressure condenser entrance, high pressure condenser outlet is connected with high-pressure reservoir entrance, high-pressure reservoir outlet is divided into two-way: cryogenic fluid pump of leading up to is connected with high pressure generator entrance, and another road is connected with low pressure generator entrance;
Low pressure generator steam (vapor) outlet is connected with low pressure ejector will main jet entrance, low pressure ejector will outlet is connected with low-pressure condenser entrance, low-pressure condenser outlet is connected with low-pressure oil storage entrance, low-pressure oil storage outlet is divided into two-way: a road is connected with high pressure evaporator entrance, and choke valve of separately leading up to is connected with low pressure evaporator;
High pressure evaporator outlet is connected with the receiving chamber of high-pressure injector, and low pressure evaporator outlet is connected with the receiving chamber of low pressure ejector will;
Low-temperature heat source import is connected with low-pressure condenser, and low-pressure condenser, high pressure condenser are connected with low-temperature heat source by low-temperature heat source main line successively.
2. the working method of a two-stage jetting type heat exchange unit, it is characterized in that, comprise: high temperature heat source flows through high pressure generator successively, low pressure generator, high pressure evaporator, low pressure evaporator are lowered the temperature step by step, under corresponding temperature conditions, produce the refrigerant vapour of different temperatures pressure successively;
The HTHP refrigerant vapour of low pressure generator steam (vapor) outlet is by the low-temp low-pressure refrigerant vapour of low pressure ejector will injection from low pressure evaporator, after in low pressure ejector will, fully mixing is pressurizeed, form the refrigerant vapour of medium temperature pressure, then condensation heat release in low-pressure condenser, heating low-temperature heat source;
The refrigerant vapour of medium temperature pressure is in low-pressure condenser after condensation, forming low pressure cryogen liquid is stored in low-pressure oil storage, then two-way is divided into: a road directly enters in high pressure evaporator and absorbs high temperature heat source heat and evaporate, step-down throttling is carried out through choke valve in another road, then enters in low pressure evaporator to absorb high temperature heat source heat and evaporate;
The HTHP refrigerant vapour of high pressure generator steam (vapor) outlet is by the low-temp low-pressure refrigerant vapour of high-pressure injector injection from high pressure evaporator, after in high-pressure injector, fully mixing is pressurizeed, form the refrigerant vapour of medium temperature pressure, then condensation heat release in high pressure condenser, heats the low-temperature heat source low-pressure condenser;
The refrigerant vapour of medium temperature pressure is in high pressure condenser after condensation, forming high pressure cryogen liquid is stored in high-pressure reservoir, but after be divided into two-way: a road directly enters in low pressure generator and absorbs high temperature heat source heat and evaporate, another road, after cryogenic fluid pump pressurization, enters in high pressure generator and absorbs high temperature heat source heat and evaporate;
Corresponding low-temperature heat source flows through low-pressure condenser, high pressure condenser successively, realizes the stepped heating of low-temperature heat source.
CN201510056403.2A 2015-02-03 2015-02-03 Two-stage ejection heat exchange unit and operating mode thereof Pending CN104676946A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106640247A (en) * 2016-12-23 2017-05-10 张承虎 Thermal power generation system with ejector

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070028646A1 (en) * 2005-08-02 2007-02-08 Denso Corporation Ejector refrigeration cycle
JP2007285175A (en) * 2006-04-14 2007-11-01 Miura Co Ltd Steam ejector, and cold water manufacturing system constituted by using the same
CN101603749A (en) * 2009-07-07 2009-12-16 河南科技大学 A kind of auto-cascade injection low-temperature refrigeration circulating device
CN102374694A (en) * 2011-07-11 2012-03-14 中国科学院广州能源研究所 CO2 multi-stage ejecting circulation heat pump/air conditioner system
CN102384604A (en) * 2011-10-26 2012-03-21 河南科技大学 Double-temperature-heat-source injection-type refrigeration system
CN102589034A (en) * 2012-03-01 2012-07-18 清华大学 Two-stage generation and two-stage condensation jet type heat exchanger unit
CN203810787U (en) * 2014-03-03 2014-09-03 徐路统 Ejecting compressional air-conditioner

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070028646A1 (en) * 2005-08-02 2007-02-08 Denso Corporation Ejector refrigeration cycle
JP2007285175A (en) * 2006-04-14 2007-11-01 Miura Co Ltd Steam ejector, and cold water manufacturing system constituted by using the same
CN101603749A (en) * 2009-07-07 2009-12-16 河南科技大学 A kind of auto-cascade injection low-temperature refrigeration circulating device
CN102374694A (en) * 2011-07-11 2012-03-14 中国科学院广州能源研究所 CO2 multi-stage ejecting circulation heat pump/air conditioner system
CN102384604A (en) * 2011-10-26 2012-03-21 河南科技大学 Double-temperature-heat-source injection-type refrigeration system
CN102589034A (en) * 2012-03-01 2012-07-18 清华大学 Two-stage generation and two-stage condensation jet type heat exchanger unit
CN203810787U (en) * 2014-03-03 2014-09-03 徐路统 Ejecting compressional air-conditioner

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106640247A (en) * 2016-12-23 2017-05-10 张承虎 Thermal power generation system with ejector
CN106640247B (en) * 2016-12-23 2018-02-27 张承虎 A kind of heat power generating system with injector

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Application publication date: 20150603