| INFLUENCE OF REFRIGERANT DISTRIBUTION ON HEAT TRANSFER IN EVAPORATORS |
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| 作者姓名： | 高原 田怀璋 曾艳 袁秀玲 |
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| 作者单位： | Institution of Refrigeration and Cryogenics，Institution of Refrigeration and Cryogenics，Department of Mechanical Engineering，Institution of Refrigeration and Cryogenics Xi'an Jiaotong University，Xi'an 710049，China，Xi'an Jiaotong University，Xi'an 710049，China，National University of Singapore，Singapore，119260，Xi'an Jiaotong University，Xi'an 710049，China |
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| 摘 要： | Invaporcompressionrefrigerationsystem ,adryexpansionevaporatorwithlargecoolingcapacityisusu allydividedintoseveralparallelcoilstoenhancetheheattransferanddecreasethepressuredrop .Itishelpfulthattherefrigerantvapourandliquidaremixedhomoge neouslyinadistributorinstalledattheinletoftheevap oratorandthendistributedintoevaporatorcoilsequally .Inpractice ,however ,theinadequatedesignandmanu factureofdistributorsalwayscauseinsufficientmixingandunequaldistributionoftherefrigerant.Inthiscasethethermost…
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INFLUENCE OF REFRIGERANT DISTRIBUTION ON HEAT TRANSFER IN EVAPORATORS |
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| Gao Yuan,Tian Huaizhang,Zeng Yan ,Yuan Xiuling Institution of Refrigeration and Cryogenics,Xi'an Jiaotong University,Xi'an ,China..INFLUENCE OF REFRIGERANT DISTRIBUTION ON HEAT TRANSFER IN EVAPORATORS[J].Academic Journal of Xi’an Jiaotong University,2003,15(1). |
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| Authors: | Gao Yuan Tian Huaizhang Zeng Yan Yuan Xiuling Institution of Refrigeration and Cryogenics Xi'an Jiaotong University Xi'an China |
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| Institution: | 1. Institution of Refrigeration and Cryogenics, Xi'an Jiaotong University, Xi'an 710049, China
2. Department of Mechanical Engineering, National University of Singapore, Singapore,119260 |
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| Abstract: | Objective To prevent the maldistribution of two phase refrigerant in dry expansion evaporators composed of parallel coils, a distributor is needed to supply refrigerant into the coils. Methods A simplified model of dry expansion evaporator was proposed. The flow and heat transfer in distributing pipes and evaporator coils were simulated with a numerical method. Results The heat flow rate decreases while the refrigerant is distributed unequally to evaporator coils. Conclusion In order to maintain the heat flow rate, larger heat transfer area should be arranged to make up the effect of maldistribution. The larger the discrepancy of mass flow rate is, the more heat transfer area is needed. |
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| Keywords: | distributor capillary evaporator numerical simulation |
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