CN102384604B - Double-temperature-heat-source injection-type refrigeration system - Google Patents

Double-temperature-heat-source injection-type refrigeration system Download PDF

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Publication number
CN102384604B
CN102384604B CN 201110329681 CN201110329681A CN102384604B CN 102384604 B CN102384604 B CN 102384604B CN 201110329681 CN201110329681 CN 201110329681 CN 201110329681 A CN201110329681 A CN 201110329681A CN 102384604 B CN102384604 B CN 102384604B
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China
Prior art keywords
outlet
injector
generator
condenser
regenerator
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Expired - Fee Related
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CN 201110329681
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CN102384604A (en
Inventor
王林
谈莹莹
崔晓龙
王江丽
梁坤峰
段丽平
张敏慧
马爱华
王雨
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Henan University of Science and Technology
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Henan University of Science and Technology
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Abstract

The invention relates to a double-temperature-heat-source injection-type refrigeration system. The working temperature of a first generator is higher than that of a second generator; the steam outlet of the first generator is connected with the working fluid inlet of a first injector; the outlet of the first injector is connected with the refrigerant inlet of a condenser; the refrigerant outlet of the condenser is divided into three ways, one way is connected with the inlet of the first generator through a first working medium pump, another way is connected with the refrigerant inlet of an evaporator through a first throttling valve, and the third way is connected with the low-pressure inlet of a condensation evaporator through a second throttling valve; the low-pressure outlet of the condensation evaporator is connected with the driving fluid inlet of the first injector; the steam outlet of a second generator is connected with the working fluid inlet of a second injector; the outlet of the second injector is divided into two ways, one way is connected with the driving fluid inlet of the first injector, and another way is connected with the high-pressure inlet of the condensation evaporator; and the high-pressure outlet of the condensation evaporator is connected with the inlet of the second generator through a second working medium pump.

Description

Two temperature-heat-source injection-type refrigeration systems
Technical field
The present invention relates to a kind of cooling cycle system, relate in particular to a kind of two temperature-heat-source injection-type refrigeration systems that utilize the low-grade energies such as solar energy or waste heat.
Background technology
The jet refrigeration circulation system adopts water, ammonia, the HF class, HFC class or HCFC class etc. are as refrigeration working medium, jet refrigeration circulation and the maximum difference of mechanical compression refrigeration circulation are to replace compressor with injector, heat from the condenser liquid working substance and produce high steam by low-temperature heat source, utilize the injector injection to carry out the low-pressure steam of flash-pot and be compressed into elevated pressures steam, for gaseous working medium condensation under higher temperature creates conditions, except working medium circulating pump without other moving component, circular flow is safeguarded few, the high-grade mechanical energy consumption is few, especially with regard to freon class working medium, only need the low-temperature heat source of 60 ℃ just can drive periodic duty, there is the solar energy of utilization, underground heat, waste heat of plant, the unique advantage of the low-grade low-temperature energy sources such as used heat, that a kind of the utilization hanged down the comparatively desirable refrigeration modes that enthalpy energy obtains refrigeration, yet, the cryogenic temperature that the conventional spray kind of refrigeration cycle can be obtained is higher, common more than 0 ℃, limited by the injector compression ratio, condenser can not obtain the too large condensing agent of pressure, cause the temperature of the cold-producing medium after condenser relatively high, the cryogenic temperature that will obtain by evaporimeter-10 ℃ is almost impossible, thereby make the application of conventional spray refrigeration machine be subject to larger restriction.
Summary of the invention
The object of the present invention is to provide two temperature-heat-source injection-type refrigeration systems that a kind of system pressure ratio is large, cryogenic temperature is low.
For achieving the above object, the present invention adopts following technical scheme: a kind of pair of temperature-heat-source injection-type refrigeration system, comprise the first generator and the second generator, the operating temperature of the first generator is higher than the operating temperature of the second generator, the steam (vapor) outlet of the first generator is connected with the working fluid import of the first injector, the outlet of the first injector is connected with the refrigerant inlet of condenser, the refrigerant outlet of condenser is divided into three tunnels, first working medium pump of wherein leading up to is connected with the import of the first generator, another road is connected with the refrigerant inlet of evaporimeter through the first throttle valve, Third Road is connected with the low pressure inlet of condenser/evaporator through the second choke valve, the low tension outlet of condenser/evaporator is connected with the driving fluid import of the first injector, the steam (vapor) outlet of the second generator is connected with the working fluid import of the second injector, the outlet of the second injector is divided into two-way, wherein a road is connected with the driving fluid import of the first injector, another road is connected with the high-pressure inlet of condenser/evaporator, the high-pressure outlet of condenser/evaporator is connected with the import of the second generator by the second working medium pump.
The outlet of described the second injector is connected with the driving fluid import of the first injector by control valve.
Be provided with the first regenerator between the outlet of described the first injector and the refrigerant inlet of condenser and between the import of the first working medium delivery side of pump and the first generator, the outlet of the first injector is connected with the first medium passage of the refrigerant inlet of condenser by the first regenerator, and the import of the first working medium delivery side of pump and the first generator is connected by the second medium passage of the first regenerator.
Be provided with the second regenerator between the refrigerant outlet of described condenser and first throttle valve and between the import of the high-pressure outlet of condenser/evaporator and the second working medium pump, the refrigerant outlet of condenser is connected with the first medium passage of first throttle valve by the second regenerator, and the import of the high-pressure outlet of condenser/evaporator and the second working medium pump is connected by the second medium passage of the second regenerator.
Be provided with the 3rd regenerator between the outlet of the first medium passage of described the second regenerator and first throttle valve and between the driving fluid import of the refrigerant outlet of evaporimeter and the second injector, the outlet of the first medium passage of the second regenerator is connected with the first medium passage of first throttle valve by the 3rd regenerator, and the driving fluid import of the refrigerant outlet of evaporimeter and the second injector is connected by the second medium passage of the 3rd regenerator.
The combination that the working medium of described pair of temperature-heat-source injection-type refrigeration system is a kind of or three in R600a, R600, R134a.
The steam that the second generator of the present invention produces carrys out the steam of flash-pot as the working fluid injection of the second injector, the driving fluid import that a part in the fluid increased through the second injector enters the first injector is entered the first generator by the steam ejection from the first generator, from the steam of the second generator, by the second injector, be the pressure of steam that enters the driving fluid import of the first injector, make the steam pressure at the first jet exit place increase, improved the pressure ratio of whole system, thereby can reduce the cryogenic temperature of evaporimeter, in order to obtain lower than the getable cryogenic temperature of jet refrigeration circulation system of the prior art.
The outlet of the second injector of the present invention is connected with the driving fluid import of the first injector by control valve, control valve can be adjusted the Fluid Volume of the driving fluid import that flows into the first injector, make the working medium balance of the circulatory system of the circulatory system of the first generator and the second generator, make system works in the best condition.
The accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention 1;
Fig. 2 is the structural representation of the embodiment of the present invention 2.
The specific embodiment
The embodiment 1 of a kind of pair of temperature-heat-source injection-type refrigeration system, in Fig. 1, the steam (vapor) outlet of its first generator 1 is connected with the working fluid import of the first injector 2, the outlet of the first injector 2 is connected with the refrigerant inlet of condenser 3, the refrigerant outlet of condenser 3 is divided into three tunnels, wherein a road is connected with the import of the first working medium pump 4, the outlet of the first working medium pump 4 is connected with the import of the first generator 1, another road is connected with the refrigerant inlet of evaporimeter 6 through first throttle valve 5, Third Road is connected with the low pressure inlet of condenser/evaporator 8 through the second choke valve 7, the low tension outlet of condenser/evaporator 8 is connected with the driving fluid import of the first injector 2, the steam (vapor) outlet of the second generator 10 is connected with the working fluid import of the second injector 9, the outlet of the second injector 9 is divided into two-way, wherein a road through control valve 14 with the driving fluid import of the first injector 2, be connected after the low tension outlet of condenser/evaporator 8 converges, another road is connected with the high-pressure inlet of condenser/evaporator 8, the high-pressure outlet of condenser/evaporator 8 is connected with the import of the second generator 10 by the second working medium pump 11.
The first generator is stretched out at the two ends that are provided with the first heating tube 12, the first heating tubes 12 in the first generator 1, and in use, the two ends of the first heating tube 12 import and export of thermal source respectively are connected, and is the cold-producing medium heating of the first generator 1.
The first generator is stretched out at the two ends that are provided with the second heating tube 13, the second heating tubes 13 in the second generator 10, and in use, the two ends of the second heating tube 13 import and export of thermal source respectively are connected, and is the cold-producing medium heating of the second generator 10.
The operating temperature of the first generator 1 is higher than the operating temperature of the second generator, the required occurrence temperature of the first generator 1 is 80 ℃~100 ℃, the required occurrence temperature of the second generator is 60 ℃~80 ℃, the refrigeration system of the present embodiment has the potentiality of effectively utilizing solar energy or low grade residual heat, and application prospect is good.The first generator and the second generator add heat can be provided by low-grade heat sources such as solar energy, geothermal energy, industrial exhaust heat or used heat.
After the first low tension outlet with condenser/evaporator 8 of the outlet of the second injector 9 in the present embodiment converges, more together with the driving fluid import of the first injector 2, be connected, the outlet of the second injector 9 also can directly be connected with the driving fluid import of the first injector 2.
The outlet of the second injector in the present embodiment is connected with the driving fluid import of the first injector by control valve, when the working medium collimation of system is less demanding, also can not arrange.
The working medium of the two temperature-heat-source injection-type refrigeration systems in the present embodiment can be a kind of in R600a, R600, R134a, can be also the combination of these three kinds of working medium.
The embodiment 2 of a kind of pair of temperature-heat-source injection-type refrigeration system, in Fig. 2, the difference of the present embodiment and embodiment 1 is: be provided with the first regenerator 15 between the refrigerant inlet of the outlet of the first injector 2 and condenser 3 and between the import of the outlet of the first working medium pump 4 and the first generator 1, the refrigerant inlet of the outlet of the first injector 2 and condenser 3 is connected by the first medium passage of the first regenerator 15, the import of the outlet of the first working medium pump 4 and the first generator 1 is connected by the second medium passage of the first regenerator 15, that is to say, the import of the first medium passage of the first regenerator 15 is connected with the refrigerant inlet of condenser 3 with the outlet of the first injector 2 respectively with outlet, the import of the second medium passage of the first regenerator 15 is connected with the import of the first generator 1 with the outlet of the first working medium pump 4 respectively with outlet,
Be provided with the second regenerator 16 between the refrigerant outlet of condenser 3 and first throttle valve 5 and between the import of the high-pressure outlet of condenser/evaporator 8 and the second working medium pump 11, the refrigerant outlet of condenser 3 is connected with the first medium passage of first throttle valve 5 by the second regenerator 16, the import of the high-pressure outlet of condenser/evaporator 8 and the second working medium pump 11 is connected by the second medium passage of the second regenerator 16, that is to say, the import of the first medium passage of the second regenerator 16 is connected with first throttle valve 5 with the refrigerant outlet of condenser 3 respectively with outlet, the import of the second medium passage of the second regenerator 16 is connected with the import of the second working medium pump 11 with the high-pressure outlet of condenser/evaporator 8 respectively with outlet,
Be provided with the 3rd regenerator 17 between the outlet of the first medium passage of the second regenerator 16 and first throttle valve 5 and between the driving fluid import of the refrigerant outlet of evaporimeter 6 and the second injector 9, the outlet of the first medium passage of the second regenerator 16 is connected with the first medium passage of first throttle valve 5 by the 3rd regenerator 17, the driving fluid import of the refrigerant outlet of evaporimeter 6 and the second injector 9 is connected by the second medium passage of the 3rd regenerator 17, that is to say, the import of the first medium passage of the 3rd regenerator 17 is connected with first throttle valve 5 with the outlet of the first medium passage of the second regenerator 16 respectively with outlet, the import of the second medium passage of the 3rd regenerator 17 is connected with the driving fluid import of the second injector 9 with the refrigerant outlet of evaporimeter 6 respectively with outlet.
Be provided with three regenerators in the present embodiment, in other embodiment, can one or two selectively be set.
Present and cold-producing medium R600a is the course of work that example illustrates the embodiment of two temperature-heat-source injection-type refrigeration systems.Liquid refrigerant R600a is vaporized into 80 ℃ of-100 ℃ of steam at the first generator 1 by the first heating tube 12 heating, refrigerant vapour from the first generator 1 enters the steam of first injector 2 injection the second injector 9 outlets and condenser/evaporator 8 low-pressure channel outlets as working fluid, mix pressurization through the first injector 2, the refrigerant vapour (the about 0.4MPa~0.5MPa of pressure) of the first injector 2 outlets enters condenser 3 and is condensed into liquid refrigerant, the liquid refrigerant of condenser 3 outlets is divided into three branch roads, wherein the cold-producing medium of is sent into the first generator 1 through the first working medium pump 4 pressurization and again is heated and is vaporized into high pressure refrigerant vapor, the cold-producing medium of the second branch road becomes the lower temperature refrigeration agent through the second choke valve 7 reducing pressure by regulating flows, then enter the low-pressure side passage of condenser/evaporator 8 and solidifying evaporimeter 8 the high-pressure side passage the gaseous refrigerant heat exchange and vaporize, the refrigerant vapour of the low-pressure side channel outlet of condenser/evaporator 8 is sucked and enters in the first injector 2, the cold-producing medium of the 3rd branch road becomes low-temperature refrigerant and enters evaporimeter 6 through first throttle valve 5 reducing pressure by regulating flows realizes cryogenic refrigeration, the refrigerant vapour of evaporimeter 6 outlets is entered in the second injector 9 by the intermediate pressure refrigerant steam ejection from the second generator 10, liquid refrigerant R600a is vaporized into 60 ℃ of-80 ℃ of steam at the second generator 10 by the second heating tube 13 heating, the middle compression refrigerant steam of the second generator 10 outlets enters the refrigerant vapour of the second injector 9 injection evaporimeter 6 outlets as working fluid, mix pressurization through the second injector 9, the refrigerant vapour (the about 0.2MPa of pressure) of the second injector 9 outlets is divided into two, wherein a branch road refrigerant vapour is through control valve 14, by the suction of the high steam from the first generator 1, entered in the first injector 9, the second branch road cold-producing medium enters the condenser/evaporator 8 high-pressure side passage colds liquid refrigerant that congeals into, then send into the second generator 10 through the second working medium pump 11 pressurizations and again by secondary heater 13 heating, be vaporized into the refrigerant vapour of middle pressure, so far, complete a complete cycle process.
In the middle of above-mentioned circulation, the working medium between the import of the working medium between the refrigerant outlet of condenser 3 and first throttle valve 5 and the high-pressure outlet of condenser/evaporator 8 and the second working medium pump 11 is by the first regenerator 15 heat exchange; Working medium between the import of the working medium between the refrigerant outlet of condenser 3 and first throttle valve 5 and the high-pressure outlet of condenser/evaporator 8 and the second working medium pump 11 is by the second regenerator 16 heat exchange; Working medium between the driving fluid import of the outlet of the first medium passage of the second regenerator 16 and the refrigerant outlet of the working medium between first throttle valve 5 and evaporimeter 6 and the second injector 9 is by the 3rd regenerator 17 heat exchange.
Occurrence temperature at the first generator 1 is 80 ℃~100 ℃, and when the occurrence temperature of the second generator is 60 ℃~80 ℃, above-mentioned pair of temperature-heat-source injection-type refrigeration system can obtain the cryogenic temperature of-5 ℃~-20 ℃ of scopes.

Claims (6)

1. a two temperature-heat-source injection-type refrigeration system, it is characterized in that: comprise the first generator and the second generator, the operating temperature of the first generator is higher than the operating temperature of the second generator, the steam (vapor) outlet of the first generator is connected with the working fluid import of the first injector, the outlet of the first injector is connected with the refrigerant inlet of condenser, the refrigerant outlet of condenser is divided into three tunnels, first working medium pump of wherein leading up to is connected with the import of the first generator, another road is connected with the refrigerant inlet of evaporimeter through the first throttle valve, Third Road is connected with the low pressure inlet of condenser/evaporator through the second choke valve, the driving fluid import of the refrigerant outlet of evaporimeter and the second injector is connected, the low tension outlet of condenser/evaporator is connected with the driving fluid import of the first injector, the steam (vapor) outlet of the second generator is connected with the working fluid import of the second injector, the outlet of the second injector is divided into two-way, wherein a road is connected with the driving fluid import of the first injector, another road is connected with the high-pressure inlet of condenser/evaporator, the high-pressure outlet of condenser/evaporator is connected with the import of the second generator by the second working medium pump.
2. according to claim 1 pair of temperature-heat-source injection-type refrigeration system, it is characterized in that: the outlet of described the second injector is connected with the driving fluid import of the first injector by control valve.
3. according to claim 2 pair of temperature-heat-source injection-type refrigeration system, it is characterized in that: between the outlet of described the first injector and the refrigerant inlet of condenser and between the import of the first working medium delivery side of pump and the first generator, be provided with the first regenerator, the outlet of the first injector is connected with the first medium passage of the refrigerant inlet of condenser by the first regenerator, and the import of the first working medium delivery side of pump and the first generator is connected by the second medium passage of the first regenerator.
4. according to claim 1 or 2 or 3 described pairs of temperature-heat-source injection-type refrigeration systems, it is characterized in that: between the refrigerant outlet of described condenser and first throttle valve and between the import of the high-pressure outlet of condenser/evaporator and the second working medium pump, be provided with the second regenerator, the refrigerant outlet of condenser is connected with the first medium passage of first throttle valve by the second regenerator, and the import of the high-pressure outlet of condenser/evaporator and the second working medium pump is connected by the second medium passage of the second regenerator.
5. according to claim 4 pair of temperature-heat-source injection-type refrigeration system, it is characterized in that: be provided with the 3rd regenerator between the outlet of the first medium passage of described the second regenerator and first throttle valve and between the driving fluid import of the refrigerant outlet of evaporimeter and the second injector, the outlet of the first medium passage of the second regenerator is connected with the first medium passage of first throttle valve by the 3rd regenerator, and the driving fluid import of the refrigerant outlet of evaporimeter and the second injector is connected by the second medium passage of the 3rd regenerator.
6. according to claim 1 pair of temperature-heat-source injection-type refrigeration system, is characterized in that: the combination that the working medium of described pair of temperature-heat-source injection-type refrigeration system is a kind of or three in R600a, R600, R134a.
CN 201110329681 2011-10-26 2011-10-26 Double-temperature-heat-source injection-type refrigeration system Expired - Fee Related CN102384604B (en)

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CN102853578B (en) * 2012-04-19 2014-06-25 浙江大学 Mixed working medium two-stage jet type refrigerating machine
CN102654326B (en) * 2012-05-28 2013-12-11 中国矿业大学 Double-injection refrigeration device synergized by gas-liquid ejector
CN104676946A (en) * 2015-02-03 2015-06-03 北京建筑大学 Two-stage ejection heat exchange unit and operating mode thereof
CN105546871B (en) * 2015-12-16 2017-12-19 山东大学 A kind of refrigerator car waste heat driven drainage type ejector refrigeration system
CN107062684B (en) * 2017-05-27 2019-10-29 山东大学 It is a kind of without pump ejector refrigeration system and refrigerating method

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SU1116277A2 (en) * 1978-10-24 1984-09-30 Одесский Завод Сельскохозяйственного Машиностроения Им.Октябрьской Революции Steam ejector freon refrigerating machine
JP4204454B2 (en) * 2003-12-09 2009-01-07 大阪瓦斯株式会社 Refrigeration equipment
CN101464070B (en) * 2009-01-04 2011-05-25 河南科技大学 Injection type low-temperature refrigerator
JP2011094814A (en) * 2009-10-27 2011-05-12 Mitsubishi Electric Corp Refrigerating cycle device and refrigerant compressing method
CN201828083U (en) * 2010-09-06 2011-05-11 中能东讯新能源科技(大连)有限公司 Waste-heat injecting refrigerator using R236FA as refrigerant
CN202284866U (en) * 2011-10-26 2012-06-27 河南科技大学 Double-temperature heat source spray type refrigeration system

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