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| 干式蒸发器制冷剂分配模拟分析与优化 |
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叶安琪1,2, 王吉进1,2, 钟衡3, 陈传宝4, 江辉民4, 倪龙1,2, 姚杨1,2
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| (1.哈尔滨工业大学建筑学院;2.寒地城乡人居环境科学与技术工业和信息化部重点实验室;3.中国民航机场建设集团有限公司西北分公司;4.南京五洲制冷集团有限公司) |
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| 摘要: |
| 换热管制冷剂分配不均是制约干式蒸发器性能的主要因素。为改善这一问题，本文提出了增设分液管和孔板两种优化方案，并利用CFD模拟和传热计算分析优化后各换热管分液均匀性、压降水平以及蒸发器换热性能的变化规律。结果表明：最优分液管方案及最优孔板方案混合相的均匀性相比样本分别提高了56.60%和60.80%，虽然带来了更大的压力损失，蒸发器换热量仍然可以提高19.69%和23.83%。 |
| 关键词: 流量分配 制冷剂 分液装置 传热系数 干式蒸发器 |
| DOI： |
| 投稿时间：2021-11-24 修订日期：2022-01-20
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| 基金项目: |
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| Refrigerant Distribution Performance of Dry-expansion Evaporator |
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Ye Anqi1,2, Wang Jijin1,2, Zhong Heng3, Chen Chuanbao4, Jiang Huimin4, Ni Long1,2, Yao Yang1,2
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| (1.School of Architecture, Harbin Institute of Technology;2.Key Laboratory of Cold Region Urban and Rural Human Settlement EnvironmentScience and Technology, Ministry of Industry and Information Technology;3.Northwest Branch of China Airport Construction Group Co.Ltd.;4.Nanjing Wuzhou Refrigeration Group Co.,Ltd.) |
| Abstract: |
| A main factor restricting the performance of dry-expansion evaporators is the imbalance of refrigerant distribution between each tube. In this study, two improvementschemes for setting a distribution pipe and an orifice plate have been proposed to address this problem. The computational fluid dynamics simulation and heat transfer calculation were used to analyze the changes in the uniformity of the refrigerant distribution, pressure drop, and heat transfer performance of the evaporator. The results showed that although they lead to greater pressure loss, the optimal distribution pipe and orifice plate improved the distribution uniformity by 56.60% and 60.80%, and the evaporator heat transfer of the two schemes improved by 19.69% and 23.83%, respectively, compared to the baseline. |
| Key words: discharge distribution refrigerant distributor coefficient of heat transfer dry-expansion evaporator |
