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 PDFInfo
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- 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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- 239000003507 refrigerant Substances 0.000 title claims abstract description 64
- 238000005057 refrigeration Methods 0.000 title claims abstract description 28
- 238000010998 test method Methods 0.000 title claims abstract description 14
- 239000007788 liquid Substances 0.000 claims abstract description 53
- 238000012360 testing method Methods 0.000 claims abstract description 44
- 238000001704 evaporation Methods 0.000 claims abstract description 11
- 230000000694 effects Effects 0.000 claims abstract description 8
- 230000000704 physical effect Effects 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 230000004907 flux Effects 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims 1
- 230000005494 condensation Effects 0.000 claims 1
- 238000009833 condensation Methods 0.000 claims 1
- 230000008020 evaporation Effects 0.000 claims 1
- 239000004744 fabric Substances 0.000 claims 1
- 239000000126 substance Substances 0.000 claims 1
- 238000004134 energy conservation Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000002309 gasification Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
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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
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.
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Cited By (3)
| 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)
| 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 |
-
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- 2019-01-17 CN CN201910045860.XA patent/CN109827350A/en active Pending
Patent Citations (3)
| 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)
| 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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