CN103017821A - Novel condenser simulating computation experiment correction method - Google Patents
Novel condenser simulating computation experiment correction method Download PDFInfo
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- CN103017821A CN103017821A CN2012104906938A CN201210490693A CN103017821A CN 103017821 A CN103017821 A CN 103017821A CN 2012104906938 A CN2012104906938 A CN 2012104906938A CN 201210490693 A CN201210490693 A CN 201210490693A CN 103017821 A CN103017821 A CN 103017821A
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Abstract
The invention discloses a novel simple experiment correction method through which correct computation results can be obtained by use of less experiment data. By the correction of flow resistance at on air side and a refrigerant side as well as the correction of heat exchange efficiency, the accuracy of simulating computation can be effectively improved, the development period of a product can be effectively shortened, the production efficiency is enhanced and the experiment cost is lowered.
Description
Technical field
The present invention relates to the air conditioning for automobiles field, relate in particular to a kind of Novel condenser simulation calculation experiment modification method.
Background technology
In air-conditioning system, condenser is condensed into the liquid refrigerants of High Temperature High Pressure with the gaseous coolant of High Temperature High Pressure, then through throttling valve, and vaporization heat absorption in evaporator.Most important in air-conditioning system of condenser.
Parallel flow condenser is because compact conformation, and heat exchange efficiency is high, low cost and other advantages and being widely used in the air-conditioning system.The performance index of condenser are to judge whether qualified important indicator of a condenser.Generally all be that sample is measured the indexs such as its heat exchange property, windage, flow resistance through the enthalpy difference experiment platform.But experiment will spend a large amount of manpower financial capacities, and experiment will take a long time.Along with the development of computer technology, people utilize computing machine to research and develop special software for calculation for air-condition heat exchanger.But software is not can both obtain a very accurately result to all heat interchanger, need to utilize experimental data correction, just can obtain correct result.
Summary of the invention
Technical matters to be solved by this invention provides a kind of software that utilizes, and utilizes less experimental data, obtains the accurately Novel condenser simulation calculation experiment modification method of result of calculation.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of Novel condenser simulation calculation experiment modification method, it is characterized in that, the similar condenser of selecting structure is no less than 5 groups, respectively by experiment with its performance index of computer software measurement, operating condition of test comprises: temperature and the degree of supercooling of condenser inlet pressure, the import degree of superheat, wind speed, inlet air, experiment condition want consistent, adopt respectively following steps to determine correction factor:
(1) windage correction factor: the windage that the experiment of each experimental group under the same wind speed draws is averaged, adjust the windage correction factor, experiment windage mean value is equated with the calculating windage;
(2) the flow resistance correction factor of refrigerant side: respectively the condenser of each experimental group is revised separately, the condensator outlet temperature that experiment is drawn equates with calculating condensator outlet temperature, draw the flow resistance correction factor of each group, get the mean value of the flow resistance correction factor of each group, immediate with mean value in the flow resistance correction factor of each group is general flow resistance correction factor;
(3) heat exchange correction factor: from air side and refrigerant side two aspect corrections:
Air side heat exchange correction factor: respectively the condenser of each experimental group is revised separately, the heat exchange amount that experiment is drawn equates with calculating heat exchange amount, draw the air side heat exchange correction factor of each group, get the mean value of the air side heat exchange correction factor of each group, immediate with mean value in the air side heat exchange correction factor of each group is universal air side heat exchange correction factor;
Refrigerant side heat exchange correction factor: respectively the condenser of each experimental group is revised separately, the outlet temperature of testing the cold-producing medium that draws is equated with the outlet temperature of calculating cold-producing medium, draw the refrigerant side heat exchange correction factor of each group, get the mean value of the refrigerant side heat exchange correction factor of each group, immediate with mean value in the refrigerant side heat exchange correction factor of each group is universal refrigerant side heat exchange correction factor.
Cold medium flux and the refrigerant resistance that the flow resistance correction factor of refrigerant side of described each group can draw by experiment and calculated value is suitable draws.
The outlet degree of superheat of refrigerant side heat exchange correction factor cold-producing medium that can draw by experiment of described each group and calculated value is suitable draws.
The invention has the advantages that, can utilize less experimental data, obtain accurately result of calculation.By the correction to air side, refrigerant side resistance to flow and heat exchange efficiency, can effectively improve the simulation calculation precision.Can effectively reduce the construction cycle of product, enhance productivity, reduce experimental cost.
Description of drawings
Fig. 1 is a kind of experimental data table of condenser;
Fig. 2 is the computational data table of Fig. 1 condenser;
Fig. 3 is software experimentation duty parameter inputting interface figure;
Fig. 4 is software heat exchange coefficient calculation interface figure;
Fig. 5 is software windage and flow resistance calculation interface figure;
Embodiment
Fig. 1 is the experimental data table of wherein a kind of condenser, and Fig. 2 is the computational data table of condenser among Fig. 1, and Fig. 3 ~ 5 are software calculation interface figure, take experiment condition as calculating initial conditions, determines cold medium flux with outlet subcooling, the heat exchange amount of condenser.After heat to be changed, cold medium flux are determined, according to windage, the flow resistance data of experiment measuring, adjust the correlation computations coefficient.Error is controlled in 5%.
For parallel flow condenser, according to the principle of similitude, guarantee for the structural similarity of revising, comprise that specifically the thickness of condenser is identical, spacing of fin is identical, the micro-channel flat structure is identical and flow process is identical.Flat tube quantity for flat tube length, each flow process can not considered.
The similar condenser experimental data of above condition selecting structure is no less than 5 groups.
Operating condition of test comprises: the temperature of condenser inlet pressure, the import degree of superheat, wind speed, inlet air and the degree of supercooling of requirement, operating condition of test want consistent.
The windage correction factor: get each value of testing windage, each value under the same wind speed is averaged, take this mean value as standard, adjust the windage correction factor, windage is equal therewith to make the calculating windage.
The flow resistance correction factor of refrigerant side: because there is phase transition process in condenser in heat exchanging process, out of phase resistance coefficient is also different, so will determine out of phase resistance coefficient according to the experiment refrigerant resistance of surveying, for refrigerant drag effects top hole pressure size, because degree of supercooling is fixed, so resistance to flow has affected outlet temperature, the heat exchange property of heat exchanger exerts an influence.To viscous drag correction the time, it is identical to guarantee that condensator outlet temperature, cold medium flux, refrigerant resistance and experiment record parameter.
For the correction of the coefficient of heat transfer, then from air side and refrigerant side two aspect corrections:
Air side heat exchange correction factor: guarantee to conform to experiment at the heat exchange amount calculated value of experiment under the air quantity gets final product.
Refrigerant side heat exchange correction factor: the outlet degree of superheat that needs to consider cold-producing medium conforms to experiment value with outlet temperature.
For determining of final correction factor, the windage correction factor can be revised by the mean value of selected experimental data, can disposable decision correction factor.
For other required correction terms, should organize experimental data according to each and revise separately, the mean value of getting every correction factor after the correction is reference standard.Then choosing a group correction coefficient that approaches the most with mean value is general correction factor.
The above has carried out exemplary description to the present invention by reference to the accompanying drawings; obviously specific implementation of the present invention is not subjected to the restriction of aforesaid way; as long as adopted the improvement of the various unsubstantialities that method of the present invention design and technical scheme carry out; or without improving design of the present invention and technical scheme are directly applied to other occasion, all within protection scope of the present invention.
Claims (3)
1. a Novel condenser simulation calculation is tested modification method, it is characterized in that, the similar condenser of selecting structure is no less than 5 groups, respectively by experiment with its performance index of computer software measurement, operating condition of test comprises: temperature and the degree of supercooling of condenser inlet pressure, the import degree of superheat, wind speed, inlet air, it is consistent that experiment condition is wanted, and adopts respectively following steps to determine correction factor:
(1) windage correction factor: the windage that the experiment of each experimental group under the same wind speed draws is averaged, adjust the windage correction factor, experiment windage mean value is equated with the calculating windage;
(2) the flow resistance correction factor of refrigerant side: respectively the condenser of each experimental group is revised separately, the condensator outlet temperature that experiment is drawn equates with calculating condensator outlet temperature, draw the flow resistance correction factor of each group, get the mean value of the flow resistance correction factor of each group, immediate with mean value in the flow resistance correction factor of each group is general flow resistance correction factor;
(3) heat exchange correction factor: from air side and refrigerant side two aspect corrections:
Air side heat exchange correction factor: respectively the condenser of each experimental group is revised separately, the heat exchange amount that experiment is drawn equates with calculating heat exchange amount, draw the air side heat exchange correction factor of each group, get the mean value of the air side heat exchange correction factor of each group, immediate with mean value in the air side heat exchange correction factor of each group is universal air side heat exchange correction factor;
Refrigerant side heat exchange correction factor: respectively the condenser of each experimental group is revised separately, the outlet temperature of testing the cold-producing medium that draws is equated with the outlet temperature of calculating cold-producing medium, draw the refrigerant side heat exchange correction factor of each group, get the mean value of the refrigerant side heat exchange correction factor of each group, immediate with mean value in the refrigerant side heat exchange correction factor of each group is universal refrigerant side heat exchange correction factor.
2. Novel condenser simulation calculation as claimed in claim 1 experiment modification method is characterized in that, cold medium flux and the refrigerant resistance that the flow resistance correction factor of the refrigerant side of described each group can draw by experiment and calculated value is suitable draws.
3. Novel condenser simulation calculation as claimed in claim 1 experiment modification method is characterized in that, the outlet degree of superheat of the cold-producing medium that refrigerant side heat exchange correction factor of described each group can draw by experiment and calculated value is suitable draws.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106528985A (en) * | 2016-11-03 | 2017-03-22 | 哈尔滨工程大学 | Partitioned simulation method for nuclear power unit condenser |
Citations (4)
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|---|---|---|---|---|
| US4768346A (en) * | 1987-08-26 | 1988-09-06 | Honeywell Inc. | Determining the coefficient of performance of a refrigeration system |
| JP2003178099A (en) * | 2001-12-11 | 2003-06-27 | Fuji Heavy Ind Ltd | Fluid analysis method and fluid analysis device using the same |
| CN102563805A (en) * | 2011-12-22 | 2012-07-11 | 广东美的制冷设备有限公司 | Control method for calculating exhaust temperature of compressor of air conditioner |
| CN102779217A (en) * | 2012-08-06 | 2012-11-14 | 大连三洋压缩机有限公司 | Computer simulation performance computation method of refrigeration system under frosting working condition |
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2012
- 2012-11-27 CN CN201210490693.8A patent/CN103017821B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4768346A (en) * | 1987-08-26 | 1988-09-06 | Honeywell Inc. | Determining the coefficient of performance of a refrigeration system |
| JP2003178099A (en) * | 2001-12-11 | 2003-06-27 | Fuji Heavy Ind Ltd | Fluid analysis method and fluid analysis device using the same |
| CN102563805A (en) * | 2011-12-22 | 2012-07-11 | 广东美的制冷设备有限公司 | Control method for calculating exhaust temperature of compressor of air conditioner |
| CN102779217A (en) * | 2012-08-06 | 2012-11-14 | 大连三洋压缩机有限公司 | Computer simulation performance computation method of refrigeration system under frosting working condition |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106528985A (en) * | 2016-11-03 | 2017-03-22 | 哈尔滨工程大学 | Partitioned simulation method for nuclear power unit condenser |
| CN106528985B (en) * | 2016-11-03 | 2019-06-25 | 哈尔滨工程大学 | A kind of partitioning emulation mode of nuclear power unit condenser |
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| CN103017821B (en) | 2015-01-14 |
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Address after: 241009 Anhui city of Wuhu Province, Hunan Road economic and Technological Development Zone No. 2-8 Patentee after: Bonaier Automotive Electrical Systems Co., Ltd. Address before: 241009 Anhui city of Wuhu Province, Hunan Road economic and Technological Development Zone No. 118 Patentee before: Wuhu Bonaire Automotive Electrical Systems Co., Ltd. |