CN109827350A - A kind of refrigeration system and refrigerant system capacity test method - Google Patents

A kind of refrigeration system and refrigerant system capacity test method Download PDF

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Publication number
CN109827350A
CN109827350A CN201910045860.XA CN201910045860A CN109827350A CN 109827350 A CN109827350 A CN 109827350A CN 201910045860 A CN201910045860 A CN 201910045860A CN 109827350 A CN109827350 A CN 109827350A
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China
Prior art keywords
temperature
refrigerant
pressure
test
liquid
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Pending
Application number
CN201910045860.XA
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Chinese (zh)
Inventor
任静
司春强
张金花
曹光
王长军
张宝
洪然
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing No6 Construction Engineering Quality Test Department Co Ltd
China Merchants International Engineering Co Ltd
China Construction First Group Corp Ltd
Beijing Building Research Institute Corp Ltd of CSCEC
Original Assignee
Beijing No6 Construction Engineering Quality Test Department Co Ltd
China Merchants International Engineering Co Ltd
China Construction First Group Corp Ltd
Beijing Building Research Institute Corp Ltd of CSCEC
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Application filed by Beijing No6 Construction Engineering Quality Test Department Co Ltd, China Merchants International Engineering Co Ltd, China Construction First Group Corp Ltd, Beijing Building Research Institute Corp Ltd of CSCEC filed Critical Beijing No6 Construction Engineering Quality Test Department Co Ltd
Priority to CN201910045860.XA priority Critical patent/CN109827350A/en
Publication of CN109827350A publication Critical patent/CN109827350A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a kind of refrigeration systems, it is sequentially connected by compressor, evaporator, throttle valve, liquid storage device and condenser etc. by pipeline and constitutes closed refrigeration system, the A being preferably provided between the condenser and the liquid storage device for testing refrigerant flow, the flowmeter of feed flow temperature and temperature sensor2B2Position;If the position does not have flowmeter described in test condition and the temperature sensor may be provided at the A between the liquid storage device and the throttle valve1B1Position;The location of C between the compressor and the evaporator is arranged in temperature sensor for testing suction temperature.The invention further relates to a kind of test method of refrigerant system capacity, including suction temperature and feed flow temperature test, evaporating pressure and condensing pressure test, refrigerant flow test.The present invention provides the specific test position of refrigerant temperature, pressure, flow in refrigeration capacity test method, and strong operability is comprehensive to the Energy Conservation effect of freezer industry with deeply, has significant improvement compared with prior art.

Description

A kind of refrigeration system and refrigerant system capacity test method
Technical field
The present invention relates to a kind of refrigeration system and refrigerant system capacity test method, in particular to one kind provides refrigerant The refrigeration system and refrigerant system capacity test method of the specific test position of temperature, pressure, flow.
Background technique
Currently, the country be related to mainly having in freezer standard it is following: GB50072-2010 " Code for design of coldstorages ", GB/T 30103.1 " freezer Thermal Performance Test method part 1s: temperature and humidity detection ", " the freezer thermal property of GB/T 30103.2 Test method part 2: wind speed measurement ", GB/T 30103.3 " freezer Thermal Performance Test method third portion: building enclosure heat Flow detection ", GB/T 15912.1-2009 " refrigeration unit and heating/refrigerating system saving energy test part 1: freezer " and SB/T 10797-2012 " indoor panel-assembled cold store " etc..GB/T15912.1-2009 " refrigeration unit and heating/refrigerating system saving energy test the 1st Part: freezer " point layout mode be, it is each measurement subregion according to rectangular or square grid carry out heat flow multiple spot Measurement.Site density is not less than 0.05 point/every square meter GB/T5773-2004 " positive displacement refrigerant compressor performance test " Point layout be that flowmeter is mounted on the pipeline between subcooler and expansion valve, temperature point configure in subcooler and stream Meter refrigerant liquid entrance, pressure gauge are mounted at flowmeter outlet.Above-mentioned standard is surveyed mainly for Refrigerating House Design, performance Method for testing is explained, preferably be used for freezer performance and evaluation on actual state, but do not provide refrigerant temperature, pressure, The specific test position of flow, operability is not strong, acts on not comprehensive enough to the Energy Conservation of freezer industry and gos deep into.
Summary of the invention
In view of this, the present invention provides a kind of refrigeration system for providing the specific test position of refrigerant temperature, pressure, flow System and refrigerant system capacity test method.
The present invention is solved the above problems by following technological means:
A kind of refrigeration system is sequentially connected by pipeline by compressor, evaporator, throttle valve, liquid storage device and condenser etc. and is constituted Closed refrigeration system, wherein the compressor is used to compress refrigerant gas, the gas compression of low pressure at height The gas of warm high pressure;The refrigerant gas for the high temperature and pressure that the condenser is used to that the compressor is discharged carries out cooling and cold It is solidifying, make its heat release, under certain pressure and temperature, gas liquefaction at refrigerant liquid;The liquid storage device is used to carry out gas Liquid separation;The throttle valve is used to depressurize the refrigerant liquid of high temperature and pressure, throttling expansion at low-pressure low-temperature liquid refrigerating Agent;The evaporator is the low-pressure low-temperature refrigerant liquid after throttling expansion, and endothermic gasification becomes gas from surrounding medium, makes Obtaining ambient temperature reduces.
It is preferably provided at preferably for test refrigerant flow, the flowmeter of feed flow temperature and temperature sensor described A between condenser and the liquid storage device2B2Position;If the position does not have flowmeter described in test condition and the temperature passes Sensor may be provided at the A between the liquid storage device and the throttle valve1B1Position;For testing the temperature sensor of suction temperature Location of C between the compressor and the evaporator is set.
A kind of test method of above-mentioned refrigerant system capacity, includes the following steps:
1) temperature sensor, suction temperature and feed flow temperature test: is respectively arranged in compressor suction duct and evaporator feed flow At the tube wall of pipe being located at before flow controller, each test position above tube wall, lower section or the opposite position being evenly distributed at least It arranges three temperature sensors, calculates separately its mean temperature and represent suction temperature and feed flow temperature;
2) pressure transmitter, evaporating pressure and condensing pressure test: is respectively arranged in compressor suction duct and system liquid supply pipe Be located at flow controller before tube wall at tested, obtain evaporating pressure and condensing pressure;
3), refrigerant flow is tested: the test position of flowmeter is preferably preferably provided at before the liquid storage device on feed liquid pipeline, if The position does not have test condition, and feed liquid pipeline rises pipeline section after test position can also be selected in refrigeration system liquid storage device;
Refrigeration system for 24 hours in overall refrigerating effect QSIt should be calculated by formula (1):
…………………………………… (1)
In formula:
Overall refrigerating effect, unit are kilowatt-hour (kW h/24h) 24 hours every to QS --- refrigeration system for 24 hours;
G --- refrigerant integrated flux for 24 hours, unit are (m3);
ρ --- refrigerant density, unit are (kg/m3);
h1--- refrigerant feed liquid specific enthalpy, unit are (kJ/kg);
h2--- refrigerant evaporates specific enthalpy, and unit is (kJ/kg);
Wherein, refrigerant feed liquid specific enthalpy is looked into refrigerant thermal physical property parameter table and is obtained by measuring feed flow temperature and condensing pressure;System Cryogen evaporates specific enthalpy to be looked into refrigerant thermal physical property parameter table and obtains by measuring suction temperature and evaporating pressure.
Preferably, data acquiring and recording should with the inside and outside temperature acquisition recording synchronism in library, data record time interval 1min, Total duration is not less than 36h, automatically records mode using continuous.
The present invention provides the specific test position of refrigerant temperature, pressure, flow, operability in refrigeration capacity test method By force, comprehensive to the Energy Conservation effect of freezer industry with deeply, have significant improvement compared with prior art.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below simple be situated between will be made to the attached drawing of embodiment It continues, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings Obtain other attached drawings.
Fig. 1 is refrigerant system capacity test position schematic diagram of the invention.
Specific embodiment
In order to keep the purposes, technical schemes and advantages of the embodiment of the present invention clearer, implement below in conjunction with the present invention Attached drawing in example, technical solution in the embodiment of the present invention are explicitly described.
A kind of refrigeration system as shown in Figure 1:, by compressor 1, evaporator 2, throttle valve 3, liquid storage device 4 and condenser 5 etc. It being sequentially connected by pipeline and constitutes closed refrigeration system, wherein the compressor 1 is used to compress refrigerant gas, The gas compression of low pressure at the gas of high temperature and pressure;The high temperature and pressure that the condenser 5 is used to that the compressor 1 is discharged Refrigerant gas is cooled down and is condensed, its heat release is made, under certain pressure and temperature, gas liquefaction at refrigerant liquid Body;The liquid storage device 4 is used to carry out gas-liquid separation;The throttle valve 3 is used to depressurize the refrigerant liquid of high temperature and pressure, throttling It is expanded into the liquid refrigerant of low-pressure low-temperature;The evaporator 2 is the low-pressure low-temperature refrigerant liquid after throttling expansion, from surrounding Endothermic gasification becomes gas in medium, so that ambient temperature reduces.
As shown in Figure 1, being preferably provided at for testing refrigerant flow, the flowmeter G of feed flow temperature and temperature sensor T A between the condenser 5 and the liquid storage device 42B2Position;If the position does not have flowmeter G described in test condition and described Temperature sensor T may be provided at the A between the liquid storage device 4 and the throttle valve 31B1Position;For testing the temperature of suction temperature The location of C between the compressor 1 and the evaporator 2 is arranged in degree sensor T.
A kind of test method of refrigerant system capacity, includes the following steps:
1) temperature sensor, suction temperature and feed flow temperature test: is respectively arranged in compressor suction duct and evaporator feed flow At the tube wall of pipe being located at before flow controller, each test position above tube wall, lower section or the opposite position being evenly distributed at least It arranges three temperature sensors, calculates separately its mean temperature and represent suction temperature and feed flow temperature;
2) pressure transmitter, evaporating pressure and condensing pressure test: is respectively arranged in compressor suction duct and system liquid supply pipe Be located at flow controller before tube wall at tested, obtain evaporating pressure and condensing pressure;
3), refrigerant flow is tested: the test position of flowmeter is preferably preferably provided at before the liquid storage device on feed liquid pipeline, if The position does not have test condition, and feed liquid pipeline rises pipeline section after test position can also be selected in refrigeration system liquid storage device;
Refrigeration system for 24 hours in overall refrigerating effect QSIt should be calculated by formula (1):
…………………………………… (1)
In formula:
QS--- overall refrigerating effect, unit are kilowatt-hour (kW h/24h) 24 hours every to refrigeration system for 24 hours;
G --- refrigerant integrated flux for 24 hours, unit are (m3);
ρ --- refrigerant density, unit are (kg/m3);
h1--- refrigerant feed liquid specific enthalpy, unit are (kJ/kg);
h2--- refrigerant evaporates specific enthalpy, and unit is (kJ/kg);
Wherein, refrigerant feed liquid specific enthalpy is looked into refrigerant thermal physical property parameter table and is obtained by measuring feed flow temperature and condensing pressure;System Cryogen evaporates specific enthalpy to be looked into refrigerant thermal physical property parameter table and obtains by measuring suction temperature and evaporating pressure;Physical parameter table can It is inquired by physical properties query software refprop.
In above-mentioned technical proposal, data acquiring and recording should with the inside and outside temperature acquisition recording synchronism in library, between the data record time Every 1min, total duration is not less than 36h, automatically records mode using continuous.
Compared with prior art, the present invention provides refrigerant temperature, pressure, flow in refrigeration capacity test method and explicitly tests Position, strong operability is comprehensive to the Energy Conservation effect of freezer industry with deeply, has significant improvement.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this In the scope of the claims of invention.

Claims (4)

1. a kind of refrigeration system, it is characterised in that: pass through pipeline by compressor, evaporator, throttle valve, liquid storage device and condenser etc. It is sequentially connected and constitutes closed refrigeration system, wherein the compressor is used to compress refrigerant gas, low pressure Gas compression at high temperature and pressure gas;The refrigerant gas for the high temperature and pressure that the condenser is used to that the compressor is discharged It is cooled down and is condensed, make its heat release, under certain pressure and temperature, gas liquefaction at refrigerant liquid;The liquid storage Device is used to carry out gas-liquid separation;The throttle valve is used to depressurize the refrigerant liquid of high temperature and pressure, and throttling expansion is low at low pressure The liquid refrigerant of temperature;The evaporator is the low-pressure low-temperature refrigerant liquid after throttling expansion, and absorb heat gas from surrounding medium Chemical conversion is gas, so that ambient temperature reduces.
2. refrigeration system according to claim 1, it is characterised in that: for testing the stream of refrigerant flow, feed flow temperature Meter and temperature sensor are preferably provided at the position A2B2 between the condenser and the liquid storage device;If the position does not have Flowmeter described in test condition and the temperature sensor may be provided at the position A1B1 between the liquid storage device and the throttle valve It sets;The location of C between the compressor and the evaporator is arranged in temperature sensor for testing suction temperature.
3. a kind of test method to refrigerant system capacity claimed in claims 1-2, it is characterised in that: including walking as follows It is rapid: 1), suction temperature and feed flow temperature test: temperature sensor is respectively arranged in compressor suction duct and evaporator liquid supply pipe The tube wall being located at before flow controller at, each test position is above tube wall, lower section or the opposite position at least cloth being evenly distributed Three temperature sensors are set, its mean temperature is calculated separately and represents suction temperature and feed flow temperature;2), evaporating pressure and condensation pressure Power test: by pressure transmitter be respectively arranged at the tube wall of compressor suction duct and system liquid supply pipe being located at before flow controller into Row test, obtains evaporating pressure and condensing pressure;3), refrigerant flow is tested: the test position of flowmeter is preferably preferably provided at Before the liquid storage device on feed liquid pipeline, if the position does not have test condition, test position can also be selected in refrigeration system liquid storage Feed liquid pipeline rises pipeline section after device;Interior overall refrigerating effect QS should be calculated refrigeration system by formula (1) for 24 hours:... ... ... ... ... ... ... ... in (1) formula: QS --- refrigeration system is always freezed for 24 hours Amount, unit are kilowatt-hour (kW h/24h) 24 hours every;G --- refrigerant integrated flux for 24 hours, unit are (m3);ρ --- system Cryogen density, unit are (kg/m3);H1 --- refrigerant feed liquid specific enthalpy, unit are (kJ/kg);H2 --- refrigerant evaporite ratio Enthalpy, unit are (kJ/kg);Wherein, refrigerant feed liquid specific enthalpy looks into the hot physical property of refrigerant by measuring feed flow temperature and condensing pressure Parameter list obtains;Refrigerant evaporation specific enthalpy is looked into refrigerant thermal physical property parameter table and is obtained by measuring suction temperature and evaporating pressure ?.
4. test method according to claim 3, it is characterised in that: data acquiring and recording should be with the inside and outside temperature acquisition in library Recording synchronism, data record time interval 1min, total duration are not less than 36h, automatically record mode using continuous.
CN201910045860.XA 2019-01-17 2019-01-17 A kind of refrigeration system and refrigerant system capacity test method Pending CN109827350A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111337280A (en) * 2020-02-29 2020-06-26 同济大学 Cold and heat quantity testing system and method for VRF air conditioning system under variable working conditions
CN112378840A (en) * 2020-11-27 2021-02-19 杭州冠力智能科技有限公司 Concrete stress loading-sulfate erosion test device
CN117433186A (en) * 2023-12-20 2024-01-23 珠海格力电器股份有限公司 Liquid separation system of refrigeration house and control method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104534710A (en) * 2014-12-11 2015-04-22 青岛大学 Refrigerator heat exchanger performance testing system refrigerant supply unit
CN106151002A (en) * 2015-04-07 2016-11-23 上海日立电器有限公司 A kind of multi-evaporation temperature system compressors performance testing device
CN210014575U (en) * 2019-01-17 2020-02-04 北京中建建筑科学研究院有限公司 Refrigerating system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104534710A (en) * 2014-12-11 2015-04-22 青岛大学 Refrigerator heat exchanger performance testing system refrigerant supply unit
CN106151002A (en) * 2015-04-07 2016-11-23 上海日立电器有限公司 A kind of multi-evaporation temperature system compressors performance testing device
CN210014575U (en) * 2019-01-17 2020-02-04 北京中建建筑科学研究院有限公司 Refrigerating system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111337280A (en) * 2020-02-29 2020-06-26 同济大学 Cold and heat quantity testing system and method for VRF air conditioning system under variable working conditions
CN111337280B (en) * 2020-02-29 2021-09-03 同济大学 Cold and heat quantity testing system and method for VRF air conditioning system under variable working conditions
CN112378840A (en) * 2020-11-27 2021-02-19 杭州冠力智能科技有限公司 Concrete stress loading-sulfate erosion test device
CN117433186A (en) * 2023-12-20 2024-01-23 珠海格力电器股份有限公司 Liquid separation system of refrigeration house and control method
CN117433186B (en) * 2023-12-20 2024-04-02 珠海格力电器股份有限公司 Liquid separation system of refrigeration house and control method

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