CN104315746A - Directly-evaporated type solar jetting refrigerating system - Google Patents

Directly-evaporated type solar jetting refrigerating system Download PDF

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Publication number
CN104315746A
CN104315746A CN201410615891.1A CN201410615891A CN104315746A CN 104315746 A CN104315746 A CN 104315746A CN 201410615891 A CN201410615891 A CN 201410615891A CN 104315746 A CN104315746 A CN 104315746A
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CN
China
Prior art keywords
solar energy
solar
heating generator
cold
energy heating
Prior art date
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Pending
Application number
CN201410615891.1A
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Chinese (zh)
Inventor
刘伟
刘自强
王建辉
彭国辉
董华昌
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INSTITUTE OF ENERGY HEBEI ACADEMY OF SCIENCE
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INSTITUTE OF ENERGY HEBEI ACADEMY OF SCIENCE
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Priority to CN201410615891.1A priority Critical patent/CN104315746A/en
Publication of CN104315746A publication Critical patent/CN104315746A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • F25B27/00Machines, plant, or systems, using particular sources of energy
    • F25B27/002Machines, plant, or systems, using particular sources of energy using solar energy
    • 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
    • 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
    • F25B41/00Fluid-circulation arrangements
    • F25B41/30Expansion means; Dispositions thereof
    • F25B41/31Expansion valves
    • 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
    • F25B49/00Arrangement or mounting of control or safety devices

Abstract

The invention belongs to energy-saving and new energy devices, and in particular provides a directly-evaporated type solar jetting refrigerating system. The system comprises a solar thermal collecting device which supplies an energy source to the system, and a jetting refrigerating device; the jetting refrigerating system comprises a jetting device, an evaporator which is connected with a nozzle of the jetting device through a pipeline, and a condenser which is connected with the output end of the jetting device; the output of the condenser is divided into two outputs through a liquid storing device; one output is connected with the input of the evaporator, and while another output is connected with refrigerant input end; the heat absorbed by the solar thermal collecting device is transmitted to the refrigerant, the vaporized refrigerant is output to the jetting device in the jetting refrigerating device; the solar thermal collecting device is a solar thermal collecting generator; the refrigerant is arranged in the solar thermal collecting generator; the output of the solar thermal collecting generator is connected with the input end of the jetting device. With the adoption of the directly-evaporated type solar jetting refrigerating system, the problems of complex structure and large heat transfer loss of the prior art can be solved; the advantages of being few in intermediate heat exchange links and high in system circulating performance and energy saving effect are realized.

Description

Direct-evaporation-type solar ejector refrigeration system
Technical field
The invention belongs to energy-conservation and new forms of energy equipment, refer to a kind of direct-evaporation-type solar ejector refrigeration system especially.
Background technology
Ejector refrigeration system is a kind of refrigeration system relying on heat energy to drive.Wherein, steam jet ejector is equivalent to the compressor in compression-type refrigeration, the low-pressure gaseous refrigerant of high-pressure work steam injection evaporimeter in injector, and makes it supercharging.To realize the compressor function in compression-type refrigeration.This refrigeration system does not directly consume mechanical energy.In ejector refrigeration system, thermal source is generally boiler, electric heater etc.Along with the development of power-saving technology, utilize solar energy to start to be subject to people as the ejector refrigeration system of thermal source and more and more pay close attention to.
Solar ejector refrigeration carries out the system of freezing as a kind of solar energy that utilizes as low level heat energy, mainly contain two parts composition: solar thermal collection system is the main energy sources of ejector refrigeration; Injection refrigerating system, by it for user provides cold.In solar heat conversion subsystem, solar thermal collector converts solar energy to heat energy, flows through generator make wherein refrigerant liquid heat absorption vaporization by heat-transfer fluid.In refrigeration subcycle, refrigerant liquid heat absorption vaporization produces saturated vapor, and saturated vapor flows through injector, near nozzle, produce low pressure, thus mixes in the refrigerant vapour suction injector in evaporimeter, and boosts with same footpath convergent-divergent diffuser; Injector mist out enters condenser condenses; Condenser refrigerant liquid is out divided into two-way, and lead up to after choke valve step-down and get back to evaporimeter, another road is entered in generator after then being boosted by circulating pump again.As can be seen from above-mentioned analysis, in current solar ejector refrigeration system, solar thermal collection system as medium, absorbs the thermal source of solar energy as spraying system mainly through water in heat collector.Cause system that the parts such as water tank, circulating pump need be set like this, cause solar energy jetting systems bulky, less economical.Meanwhile, need between water and cold-producing medium to realize energy transferring by heat exchange, add system heat transfer loss.Reduce the refrigeration cycle performance coefficient of whole spraying system.
In existing patent document and other data, main direction of studying is the composite system that solar ejector refrigeration system is combined with other refrigeration modes.A kind of solar energy jetting and speed-variable compression integrated refrigeration device is disclosed in the document of such as publication number CN200710056427.But the device volume of said structure is large, and complex structure, Solar use efficiency is low, and systematic energy efficiency ratio is generally between 0.18-0.3.Architecture-integral is not utilized to apply.
Summary of the invention
The object of the present invention is to provide that structure is simple, intermediate heat transfer link is few, the direct-evaporation-type solar ejector refrigeration system of systemic circulation performance and good energy-conserving effect.
Overall technology design of the present invention is:
Direct-evaporation-type solar ejector refrigeration system, comprise for system provides solar energy heat collector and the injection cooling device of energy source, wherein injection cooling device comprises injector, the evaporimeter be connected by pipeline with the nozzle of injector, the condenser be connected with the output of injector, the output of condenser is divided into two-way to export after liquid reservoir, and wherein a road connects the input of evaporimeter, and another road connects cold-producing medium input; The heat that solar energy heat collector absorbs passes to cold-producing medium, and the cold-producing medium after vaporization exports the injector in injection cooling device to; Solar energy heat collector selects solar energy heating generator, and cold-producing medium is located in solar energy heating generator, and the output of solar energy heating generator connects the input of injector.
Concrete technology contents of the present invention also has:
Be divided into two-way to export after the output of described condenser connects liquid reservoir, wherein a road connects the input of evaporimeter through expansion valve, and another Lu Zejing circulating pump connects the cold-producing medium input in solar energy heating generator.
For measurement data calculates the collecting efficiency of solar energy heating generator and the jet coefficient of injector, thus the system that calculates flies cycle performance coefficient, and preferred technical scheme also includes anemobiagraph, and the side of solar energy heating generator is located at by anemobiagraph.
Further optimal technical scheme is, also includes the global solar radiation radiometer, the scattering radiation table that are connected with solar energy heating generator.
For observing solar energy heating generator, condenser, the working medium out temperature of evaporimeter, pressure changing, finally determine the optimal operating condition parameter of applicable system.Preferred technical scheme is, is also provided with pressure sensor, temperature sensor, flowmeter in the pipeline be connected with solar energy heating generator.Can it is evident that, in the pipeline be connected to condenser, evaporimeter, liquid reservoir, correspondingly be provided with pressure sensor and temperature sensor.
For controlling Temperature of Working in solar energy heating generator, thus the working condition of injector under obtaining designing occurrence temperature and different temperatures, preferred technical scheme is, is also provided with temperature controller in the pipeline be connected with solar energy heating generator.
For reducing intermediate heat transfer link, improve cold-producing medium occurrence temperature, solar energy heating generator preferably adopts following structure, comprise and be covered on absorber plate lower surface and the coil pipe be located in heat-preservation cotton shell, the cold-producing medium of splendid attire in coil pipe, and being arranged at intervals at the anti-reflection glass on absorber plate surface, the entrance of coil pipe and exit opening are in heat-preservation cotton housing exterior.
For reducing the destruction of cold-producing medium for ozone layer, cold-producing medium preferably adopts environmental protection refrigerant R134a.
The present invention is work like this:
Solar energy heating generator converts solar energy to heat energy, makes wherein refrigerant liquid heat absorption vaporization by the phase-change heat transfer of complexity; In kind of refrigeration cycle subsystem, refrigerant liquid heat absorption vaporization produces saturated vapor, and saturated vapor flows through injector, near its nozzle, produce low pressure, thus mixes in the refrigerant vapour suction injector in evaporimeter, and boosts with same footpath convergent-divergent diffuser; The mist that injector exports enters condenser condenses; Be divided into two-way to export after the refrigerant liquid that condenser exports enters liquid reservoir, lead up to after expansion valve step-down and export evaporimeter to, another road is exported to after then being boosted by circulating pump in solar energy heating generator, the kind of refrigeration cycle of completion system.
Applicant has carried out following performance test to the solar ejector refrigeration of direct-evaporation-type disclosed in the present invention system, test process and result as follows:
One, content measurement: system energy efficiency coefficient, than conventional refrigerant system amount of energy saving
Two, foundation is tested: " air conditioning Refrigeration Technique " (second edition) China Construction Industry Press
Three, test parameter: system power consumption, evaporator inlet-outlet pressure, temperature and refrigerant flow, solar thermal collector inlet and outlet pressure, temperature and refrigerant flow, condenser inlet and outlet pressure, temperature and refrigerant flow.Solar radiation amount, environment temperature, indoor temperature etc.
Four, the testing time: on August 12 ,-2014 years on the 5th August in 2014
Five, tested object: the Hebei Academy of Sciences energy 5 layers have chosen two building enclosures, towards, two rooms that construction area is identical.Two space cooling loads are 4kw.Wherein, No. one room uses the hanging single-cooling air-conditioner of wall hanging to freeze, and No. two room uses the direct-evaporation-type solar ejector refrigeration system in the present invention to freeze.Two cover systems all arrange 24 DEG C of autostops.The test period of every day is 9:00-17:00.
Six, main testing equipment: PT100 sensor, LR3000 high temperature pressure transmitter, electrical power instrument, CM-ZFS type solar energy global radiation instrument, FTI turbine flowmeter etc.
Seven, test process: August-2014 years on the 5th August in 2014 has carried out system testing on 12nd, adopt computer acquisition system to carry out the collection of related data, writing time, price was 10s.
Eight, test result: after having tested, applicant analyzes related data: indoor temperature all maintains 24 DEG C.A room air conditioning system hourly average power consumption is 2.1 degree, No. two room direct-evaporation-type solar ejector refrigeration system hourly average power consumption is 1.1 degree (being mainly the power consumption of condenser circulating pump, condenser fan and evaporimeter power consumption), a comparatively room air conditioning system power saving about 47.6%.The mean temperature of R134a in solar energy heating generator is 92.5 DEG C.
By formula
cop = Q e Q g = μ ( h v , evqp - h f , con ) h v , gene - h f , con
In formula,
Q e---represent the refrigerating capacity of system, kw;
Q g---what represent system adds heat, kw;
H v, evap---represent steam enthalpy in system evaporator, kJ/kg;
H v, gene---represent steam enthalpy in system thermal-arrest generator, kJ/kg;
H f, con---represent steam enthalpy in system condenser, kJ/kg.
After measuring the numerical value such as the temperature of R134a in condenser, evaporimeter, pressure, flow, look into the P-h figure of R134a, and after calculating, the mean value of direct-evaporation-type solar ejector refrigeration system cop is 0.53.
Substantive distinguishing features acquired by the present invention and significant technological progress are:
1, the generator of injection refrigerating system is saved compared to existing technology, adopt solar energy heating generator integrated technique, refrigeration working medium carries out direct evaporative phase-change heat exchange of absorbing heat wherein, decreases intermediate heat transfer link, improves cold-producing medium occurrence temperature (more than 90 DEG C).And conventional solar energy jetting system heat collector occurrence temperature is generally at 60-80 DEG C.
2, test through applicant, systematic energy efficiency ratio is more than 0.5, reduce system energy consumption (more energy-conservation than conventional system more than 40%), improve cycle performance and the energy-saving effect of system, for new approach has been opened up in the application under construction of solar ejector refrigeration system.
3, adopt environmental protection refrigerant R134a, decrease cold-producing medium to depletion of the ozone layer.
Accompanying drawing explanation
Accompanying drawing of the present invention has:
Fig. 1 is structural representation of the present invention.
Fig. 2 is the outline drawing of the solar energy heating generator in the present invention.
Fig. 3 is the A-A direction view of Fig. 2.
Reference numeral in accompanying drawing is as follows:
1, solar energy heating generator; 2, injector; 3, condenser; 4, evaporimeter; 5, liquid reservoir; 6, expansion valve; 7, circulating pump; 8, temperature controller; 9, pressure sensor; 10, temperature sensor; 11, global solar radiation radiometer; 12, scattering radiation table; 13, anemobiagraph; 14, flowmeter; 15, absorber plate; 16, coil pipe; 17, anti-reflection glass; 18, heat-preservation cotton shell.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the invention are described further; but it is not as a limitation of the invention; the content that protection scope of the present invention is recorded with claim is as the criterion, and any equivalent technical elements made according to description is replaced, and does not all depart from protection scope of the present invention.
The unitary construction of the present embodiment is as diagram, comprising the solar energy heat collector and the injection cooling device that provide energy source for system, wherein injection cooling device comprises injector 2, the evaporimeter 4 be connected by pipeline with the nozzle of injector 2, the condenser 3 be connected with the output of injector 2, the output of condenser 3 is divided into two-way to export after liquid reservoir 5, and wherein a road connects the input of evaporimeter 4, and another road connects cold-producing medium input; The heat that solar energy heat collector absorbs passes to cold-producing medium, and the cold-producing medium after vaporization exports the injector 2 in injection cooling device to; Solar energy heat collector selects solar energy heating generator 1, and cold-producing medium is located in solar energy heating generator 1, and the output of solar energy heating generator 1 connects the input of injector 2.
Be divided into two-way to export after the output of described condenser 3 connects liquid reservoir 5, wherein a road connects the input of evaporimeter 4 through expansion valve 6, and another Lu Zejing circulating pump 7 connects the cold-producing medium input in solar energy heating generator 1.
Also include anemobiagraph 13, the side of solar energy heating generator 1 is located at by anemobiagraph 13.
Also include the global solar radiation radiometer 11, the scattering radiation table 12 that are connected with solar energy heating generator 1.
Pressure sensor 9, temperature sensor 10, flowmeter 14 is also provided with in the pipeline be connected with solar energy heating generator 1.Can it is evident that, correspondingly to the pipeline that condenser 3, evaporimeter 4, liquid reservoir 5 are connected be provided with pressure sensor and temperature sensor.
Temperature controller 8 is also provided with in the pipeline be connected with solar energy heating generator 1.
Solar energy heating generator 1 preferably adopts following structure, comprise and be covered on absorber plate 15 lower surface and the coil pipe 16 be located in heat-preservation cotton shell 18, the cold-producing medium of splendid attire in coil pipe 16, and being arranged at intervals at the anti-reflection glass 17 on absorber plate 15 surface, the entrance of coil pipe 16 and exit opening are in heat-preservation cotton shell 18 outside.
For reducing the destruction of cold-producing medium for ozone layer, cold-producing medium preferably adopts environmental protection refrigerant R134a.

Claims (8)

1. direct-evaporation-type solar ejector refrigeration system, comprise for system provides solar energy heat collector and the injection cooling device of energy source, wherein injection cooling device comprises injector (2), the evaporimeter (4) be connected by pipeline with the nozzle of injector (2), the condenser (3) be connected with the output of injector (2), the output of condenser (3) is divided into two-way to export after liquid reservoir (5), wherein a road connects the input of evaporimeter (4), and another road connects cold-producing medium input; The heat that solar energy heat collector absorbs passes to cold-producing medium, and the cold-producing medium after vaporization exports the injector (2) in injection cooling device to; It is characterized in that solar energy heat collector selects solar energy heating generator (1), cold-producing medium is located in solar energy heating generator (1), and the output of solar energy heating generator (1) connects the input of injector (2).
2. direct-evaporation-type solar ejector refrigeration system according to claim 1, it is characterized in that the output of described condenser (3) is divided into two-way to export after connecing liquid reservoir (5), wherein a road connects the input of evaporimeter (4) through expansion valve (6), and another Lu Zejing circulating pump (7) connects the cold-producing medium input in solar energy heating generator (1).
3. direct-evaporation-type solar ejector refrigeration system according to claim 1, characterized by further comprising anemobiagraph (13), and the side of solar energy heating generator (1) is located at by anemobiagraph (13).
4. direct-evaporation-type solar ejector refrigeration system according to claim 1, is characterized in that and also be provided with pressure sensor (9), temperature sensor (10), flowmeter (14) in the pipeline that solar energy heating generator (1) is connected.
5. direct-evaporation-type solar ejector refrigeration system according to claim 1, characterized by further comprising the global solar radiation radiometer (11), the scattering radiation table (12) that are connected with solar energy heating generator (1).
6. direct-evaporation-type solar ejector refrigeration system according to claim 1, is characterized in that also being provided with temperature controller (8) with the pipeline that solar energy heating generator (1) is connected.
7. the direct-evaporation-type solar ejector refrigeration system according to any one of claim 1-7, it is characterized in that described solar energy heating generator (1) comprises and be covered on absorber plate (15) lower surface and the coil pipe (16) be located in heat-preservation cotton shell (18), the cold-producing medium of splendid attire in coil pipe (16), and being arranged at intervals at the anti-reflection glass (17) on absorber plate (15) surface, the entrance of coil pipe (16) and exit opening are in heat-preservation cotton shell (18) outside.
8. direct-evaporation-type solar ejector refrigeration system according to claim 7, is characterized in that environmental protection refrigerant R134a selected by described cold-producing medium.
CN201410615891.1A 2014-11-05 2014-11-05 Directly-evaporated type solar jetting refrigerating system Pending CN104315746A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105698428A (en) * 2016-03-25 2016-06-22 太原理工大学 Cold supply device combining solar energy jetting and direct evaporation
CN105737437A (en) * 2016-03-25 2016-07-06 太原理工大学 Photovoltaic power supply type solar injection and direct evaporation composite refrigerating device
CN105737438A (en) * 2016-03-25 2016-07-06 太原理工大学 Solar photovoltaic and photo-thermal driven injection and direct evaporation composite cooling device

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Cited By (6)

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Publication number Priority date Publication date Assignee Title
CN105698428A (en) * 2016-03-25 2016-06-22 太原理工大学 Cold supply device combining solar energy jetting and direct evaporation
CN105737437A (en) * 2016-03-25 2016-07-06 太原理工大学 Photovoltaic power supply type solar injection and direct evaporation composite refrigerating device
CN105737438A (en) * 2016-03-25 2016-07-06 太原理工大学 Solar photovoltaic and photo-thermal driven injection and direct evaporation composite cooling device
CN105698428B (en) * 2016-03-25 2018-08-10 太原理工大学 Solar energy jetting and directly evaporate compound cooling apparatus
CN105737437B (en) * 2016-03-25 2018-08-10 太原理工大学 Photovoltaic power supply formula solar energy jetting and directly evaporation composite refrigerating device
CN105737438B (en) * 2016-03-25 2019-02-01 太原理工大学 The injection and directly evaporate compound cooling apparatus that photovoltaic and photo-thermal drive

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Application publication date: 20150128