CN202328894U

CN202328894U - Solar-driven refrigerating machine

Info

Publication number: CN202328894U
Application number: CN2011204489517U
Authority: CN
Inventors: 王林; 段双平; 谈莹莹; 崔晓龙; 张敏慧; 王雨; 马爱华
Original assignee: Henan University of Science and Technology
Current assignee: Henan University of Science and Technology
Priority date: 2011-11-14
Filing date: 2011-11-14
Publication date: 2012-07-11
Anticipated expiration: 2021-11-14

Abstract

The utility model relates to a solar-driven refrigerating machine. The solar-driven refrigerating machine comprises a first generator and a second generator, wherein the working temperature of the first generator is higher than that of the second generator; a refrigerant outlet of the first generator is connected with a working fluid inlet of a first ejector; an outlet of the first ejector is connected with a refrigerant inlet of the refrigerating machine; a refrigerant outlet of a condenser is divided into three paths, wherein one path is connected with a refrigerant inlet of an evaporator by a throttling part, an refrigerant outlet of the evaporator is connected with an ejecting fluid inlet of a second ejector; another path is connected with a refrigerant inlet of the first generator by a first working medium pump; the third path is connected with a refrigerant inlet of the second generator by a second working medium pump, a refrigerant outlet of the second generator is connected with a working fluid inlet of a second ejector, and an outlet of the second ejector is connected with an ejecting fluid inlet of the first ejector. The solar-driven refrigerating machine has the advantages that the cascaded utilization of energy is realized, and the whole system is high in energy utilization ratio and good in energy-saving effect.

Description

The refrigeration machine of Driven by Solar Energy

Technical field

The utility model relates to a kind of cooling cycle system, relates in particular to a kind of refrigeration machine that utilizes the Driven by Solar Energy of low-grade energies such as solar energy or waste heat.

Background technology

Energy scarcity has become the significant problem that the present whole world must be faced and solve.Improve existing efficiency of energy utilization, the development and use regenerative resource realizes that sustainable development becomes a theme of current era.The basic principle of reasonable energy is " temperature counterpart, a cascade utilization "; Promptly in utilizing energy processes, the branch occasion, utilize energy stage by stage, the energy that reaches different qualities is rationally utilized; Thereby raising energy utilization rate, the cascade utilization of the energy are energy-conservation important measures.Traditional single spray type refrigerating system is simple, moving component is few, compact conformation, take up room little; And have low-grade energies such as regenerative resources such as utilizing solar energy, underground heat and industrial exhaust heat and realize the advantage of freezing; Can improve the energy and effectively utilize degree; Convenient for maintenance management is a kind of up-and-coming refrigeration modes.

The jet refrigeration circulation system adopts water, ammonia, HF class, HFC class or HCFC class etc. as refrigeration working medium, and jet refrigeration circulation and the maximum difference of mechanical compression refrigeration circulation are to replace compressor with injector, produce high steam through the low-temperature heat source heating from the condenser liquid working substance; Utilize the injector injection to come the low-pressure steam of flash-pot and be compressed into elevated pressures steam,, except that working medium circulating pump, do not have other moving component for gaseous working medium condensation under higher temperature creates conditions; Circular flow is safeguarded few, and the high-grade mechanical energy consumption is few, especially with regard to freon class working medium; Only needing 60 ℃ low-temperature heat source just can drive periodic duty, have the unique advantage of low-grade low-temperature energy sources such as utilizing solar energy, underground heat, waste heat of plant, used heat, is 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, and is common more than 0 ℃, receives the little restriction of injector compression ratio; Be difficult to reach cooling medium required condensing pressure requirement when chilling temperature is higher of condenser; So cryogenic temperature is higher, and this system effectiveness is lower, cause through the temperature of the cold-producing medium behind the condenser higher relatively; The cryogenic temperature that will obtain-10 ℃ through evaporimeter almost is impossible, receives than limitations thereby make the conventional spray refrigeration machine use.

The utility model content

The purpose of the utility model is to provide the refrigeration machine of the Driven by Solar Energy that a kind of system pressure ratio is big, cryogenic temperature is low.

For realizing above-mentioned purpose; The utility model adopts following technical scheme: a kind of refrigeration machine of Driven by Solar Energy; Comprise first generator and second generator, the operating temperature of first generator is higher than the operating temperature of second generator, and the refrigerant outlet of first generator links to each other with the working fluid import of first injector; The outlet of first injector links to each other with the refrigerant inlet of condenser; The refrigerant outlet of condenser is divided into three the tunnel, and wherein one the tunnel links to each other with the refrigerant inlet of evaporimeter through throttle part, and the refrigerant outlet of evaporimeter links to each other with the driving fluid import of second injector; Another road first working medium pump links to each other with the refrigerant inlet of first generator; Third Road links to each other with the refrigerant inlet of second generator through second working medium pump, and the refrigerant outlet of second generator links to each other with the working fluid import of second injector, and the outlet of second injector links to each other with the driving fluid import of first injector.

Said first generator is the cold-producing medium heating through first heating tube that is provided with in it, and second generator is the cold-producing medium heating through second heating tube that is provided with in it, and the heating agent outlet of first heating tube links to each other with the heating agent import of second heating tube.

The steam that second generator of the utility model produces comes the steam of flash-pot as the working fluid injection of second injector; The fluid that increases through second injector gets into the driving fluid import of first injector and is gone into first generator from the steam ejection of first generator; Steam from second generator passes through the increase pressure of second injector for the steam of the driving fluid import of entering first injector; The steam pressure at the jet exit place that wins is increased; Improved the pressure ratio of whole system, thereby can reduce the cryogenic temperature of evaporimeter, so that obtain being lower than the getable cryogenic temperature of jet refrigeration circulation system of the prior art.

First generator of the utility model is the cold-producing medium heating through first heating tube that is provided with in it; Second generator is the cold-producing medium heating through second heating tube that is provided with in it, and the heating agent outlet of first heating tube links to each other with the heating agent import of second heating tube, and the continuation that is got into second generator by the heating agent that comes out in first heating tube is used; Realized the cascade utilization of low-grade energy; Improve the efficiency of energy utilization of whole system, energy-saving effect is remarkable, has a extensive future.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment.

The specific embodiment

A kind of two warm sources spray type refrigerating system implementation example; In Fig. 1; The refrigerant outlet of its first generator 1 links to each other with the working fluid import of first injector 2, and the outlet of first injector 2 links to each other with the refrigerant inlet of condenser 3, and the refrigerant outlet of condenser 3 is divided into three the tunnel; Wherein one the tunnel links to each other through the refrigerant inlet of throttle part 4 with evaporimeter 5; The refrigerant outlet of evaporimeter 5 links to each other with the driving fluid import of second injector 6, and another road first working medium pump 7 links to each other with the refrigerant inlet of first generator 1, and Third Road links to each other with the refrigerant inlet of second generator 8 through second working medium pump 9; The refrigerant outlet of second generator 8 links to each other with the working fluid import of second injector 6, and the outlet of second injector 6 links to each other with the driving fluid import of first injector 2.Wherein the operating temperature of first generator 1 is higher than the operating temperature of second generator 8.

First generator is stretched out at the two ends that are provided with first heating tube, 10, the first heating tubes 10 in first generator 1, and in use, first generator 1 is the cold-producing medium heating through first heating tube 10.

Second generator is stretched out at the two ends that are provided with first heating tube, 10, the second heating tubes 11 in second generator 8, and in use, second generator 8 is the cold-producing medium heating through second heating tube 11.

The heating agent outlet of first heating tube 10 links to each other with the heating agent import of second heating tube 11.

The intermediate pressure refrigerant steam that second generator 8 in this refrigeration system produces gets into the low pressure refrigerant vapor in second injector, the 6 injection evaporimeters 5 as working steam; Improved the jetting steam caused pressure of first injector 2; Improve the jet coefficient of first injector 2 and the pressure ratio of system, in evaporimeter 5, can obtain lower cryogenic temperature.

First generator and second generator in the foregoing description all come the heating and cooling agent through heating tube, also can utilize other mode of heating of the prior art to heat.

The heat that adds of first heating tube 10 and second heating tube 11 is provided by solar energy, through solar thermal collector solar energy collecting is got up to be used for to add hot water, again hot water is offered first heating tube and second heating tube.

Certainly, the energy in the foregoing description also can be provided by geothermal energy, industrial exhaust heat or used heat.

The operation principle of this pair spray type refrigerating circulatory system:

The heating agent import 10a of the hot water of low-grade energy heating through first heating tube 10 get into first generator 1 will wherein liquid refrigerant be heated as high pressure refrigerant vapor after, the heating agent import 11a that comes out to get into second heating tube 11 by the heating agent outlet 10b of first heating tube 10 then is heated as intermediate pressure refrigerant steam with liquid refrigerant in second generator 8.

The high pressure refrigerant vapor that produces in first generator 1; Get into the refrigerant vapour of first injector, 2 injections as working steam from 6 outlets of second injector; Refrigerant vapour after first injector 2 mixes pressurization gets in the condenser 3; The gas-liquid two-phase cold-producing medium is condensed in condenser 3; The liquid refrigerant of condenser 3 outlets is divided into three parts; It is the working steam of first injector 2 that part liquid refrigerant entering first generator 1 after 7 pressurizations of first working medium pump is heated gasification; Part liquid refrigerant then gets into evaporimeter 5 through throttle part 4 throttling step-downs becoming low-pressure low-temperature cold-producing medium and realizes refrigeration; The third part liquid refrigerant gets into second generator 8, and to be heated gasification be the low-temperature low-pressure refrigerant steam that the working steam injection of second injector 6 comes flash-pot 5 through second working medium pump 9 pressurization back, and the refrigerant vapour quilt that mixes pressurizations through second injector 6 gets into first injector 2 from the high pressure refrigerant vapor injection of first generator 1, so far accomplishes a cyclic process.

Be the course of work of the above-mentioned pair of spray type refrigerating circulatory system of example explanation below with the R600a cold-producing medium.

Low-grade energies such as waste heat, used heat or solar energy are heated to 100 ℃ with water; 100 ℃ of hot water gets into first heating tube 10 through the heating agent import 10a of first heating tube 10; After liquid refrigerant is heated as the high pressure refrigerant vapor that pressure is 1.64MPa in first generator 1; The hot water of lowering the temperature into 70 ℃ flows out from the heating agent of first heating tube 10 outlet 10b; Heating agent import 11a through second heating tube 11 gets into second heating tube 11, and liquid refrigerant in second generator 8 is heated as the intermediate pressure refrigerant steam that pressure is 0.974MPa, and hot water is finally flowed out by the second heating tube 11b.

Intermediate pressure (0.974MPa) refrigerant vapour that second generator 8 produces carries out adiabatic expansion through nozzle in second injector 6; Form one low-voltage high speed steam;-10 ℃ of saturated refrigerant vapours (pressure is 0.108MPa) in the evaporimeter 5 are sucked the ejecting port of second injector 6; After fully mixing is pressurized to 0.216MPa in second injector 6; The low-voltage high speed steam that the high pressure refrigerant vapor (1.64MPa) that is produced by first generator 1 forms through first injector, 2 adiabatic expansions sucks and gets into condenser 3 after the 2 interior fully mixing of first injector are pressurized to 0.406MPa, and the water that is cooled further is condensed into 30 ℃ of liquid refrigerants, and condenser 3 outlet liquid refrigerants are divided into three the tunnel; One road liquid refrigerant gets into evaporimeter 5 through throttle part 4 backs; Heat absorption produces refrigeration effect in evaporimeter 5, and one road liquid refrigerant gets into first generator 1 under the injection of first working medium pump 7, and the Third Road liquid refrigerant gets into second generator 8 under the injection of second working medium pump 9.

Claims

1. the refrigeration machine of a Driven by Solar Energy; It is characterized in that: comprise first generator and second generator; The operating temperature of first generator is higher than the operating temperature of second generator; The refrigerant outlet of first generator links to each other with the working fluid import of first injector, and the outlet of first injector links to each other with the refrigerant inlet of condenser, and the refrigerant outlet of condenser is divided into three the tunnel; Wherein one the tunnel links to each other with the refrigerant inlet of evaporimeter through throttle part; The refrigerant outlet of evaporimeter links to each other with the driving fluid import of second injector, and another road first working medium pump links to each other with the refrigerant inlet of first generator, and Third Road links to each other with the refrigerant inlet of second generator through second working medium pump; The refrigerant outlet of second generator links to each other with the working fluid import of second injector, and the outlet of second injector links to each other with the driving fluid import of first injector.

2. the refrigeration machine of Driven by Solar Energy according to claim 1; It is characterized in that: said first generator is the cold-producing medium heating through first heating tube that is provided with in it; Second generator is the cold-producing medium heating through second heating tube that is provided with in it, and the heating agent outlet of first heating tube links to each other with the heating agent import of second heating tube.