| 再循环重力供液蒸发器管内换热性能预测 |
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| 引用本文： | 赵小志,臧润清,李星.再循环重力供液蒸发器管内换热性能预测[J].低温与超导,2010,38(12). |
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| 作者姓名： | 赵小志 臧润清 李星 |
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| 作者单位： | 天津商业大学制冷与空调工程系,天津市制冷技术重点实验室,冷冻冷藏技术教育部工程研究中心,天津,300134 |
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| 摘 要： | 为了找出适用于再循环重力供液蒸发器管内强制对流沸腾换热系数的关系式,通过对以R404A为制冷剂的重力供液实验台的研究,编程计算出J.Chawla关系式及Shah关联式对重力供液沸腾换热系数进行预测值。与实验结果比较可知:J.Chawla关系式在较低温度下较接近于实验值,Shah关联式在较高的温度下可以对实验值进行预测,两种关系式相结合的方法就可以较好对重力供液蒸发器管内沸腾换热进行预测。
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| 关 键 词： | 重力供液 蒸发器 再循环蒸发器 沸腾换热 传热系数 |
Performance prediction of heat exchange inside the tube of evaporator with liquid refrigerant supplied by gravity using recycle refrigerant |
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| Zhao Xiaozhi,Zang Runqing,Li Xing.Performance prediction of heat exchange inside the tube of evaporator with liquid refrigerant supplied by gravity using recycle refrigerant[J].Cryogenics and Superconductivity,2010,38(12). |
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| Authors: | Zhao Xiaozhi Zang Runqing Li Xing |
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| Institution: | Zhao Xiaozhi,Zang Runqing,Li Xing(Refrigeration and Air Conditioning Engineering Department,Tianjin University of Commerce,Major Laboratory of Refrigeration in Tianjin,Tianjin 300134,China) |
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| Abstract: | In order to find the equation fitting for forced-convection boiling heat transfer inside the pipes of evaporator with liquid refrigerant supplied by gravity using recycle refrigerant,by experiment research to a test-bed of liquid refrigerant of R404A supply by gravity,this study adopted the combine of J.Chawla and Shah relation to predict the coefficient of heat transfer.Compared with the results of experiment,it could be found that J.Chawla relation would fit better at lower vaporization temperature,meanwh... |
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| Keywords: | Supplying liquid refrigerant by gravity Evaporator Recycle refrigerant Boiling heat transfer Coefficient of heat transfer |
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