| 摘要: |
| 本文提出一种适用于制冷系统泄漏探测的制冷剂质量计算模型。通过该模型可以实时计算出制冷系统内部各部件内的制冷剂质量，并实现对制冷系统的泄漏探测。在制冷剂质量计算模型中，开发了基于温度信号进行相区划分的换热器分区制冷剂质量计算模型，提出了基于理论和显式表达式的压缩机及连接管路的制冷剂质量计算模型。验证结果表明，该模型对制冷剂质量的最大计算误差为3.18%。 |
| 关键词: 制冷系统 泄漏探测 制冷剂质量 |
| DOI： |
| 投稿时间：2018-11-23 修订日期：2019-02-13
|
| 基金项目:上海市工业强基专项(No.GYQJ-2017-5-09)资助。 |
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| Calculation Model of a Refrigerant Mass for Leak Detection in a Refrigeration System |
|
Li Hao1, Sun Haoran1, Hu Haitao1, Wu Chengyun2, Wang Xuyang2, Lü Zhongyuan2
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| (1.Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University;2.Shanghai Aircraft Design and Research Institute) |
| Abstract: |
| A leakage monitoring method in a refrigeration system based on a theoretical model of refrigerant charge is proposed. In this method, a theoretical model based on a temperature signal is developed, and the refrigerant mass in each component of the refrigeration system can be calculated and the leakage in the refrigeration system can be monitored. For the theoretical model of refrigerant charge, a division criterion of control volumes and governing equation of the phase zone are established using the multi-zone method for the heat exchanger. A temperature-based calculation model of refrigerant mass in the heat exchanger is developed; the refrigerant mass models for the compressor and the connecting pipe are developed by establishing theory-based explicit equations. The validation results show that the maximum deviation is 3.18%. |
| Key words: refrigerant system leakage monitoring refrigerant mass |
