带专用过冷装置的蒸气压缩式制冷系统过冷量与制冷量增量转换规律的试验研究

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英文篇名：Experimental study of conversion regular between subcooling power and increase of cooling output in vapour compression chiller with dedicate subcooling 作者：陈尔健 ; 余健亭 ; 许永睿 ; 李泽宇 英文作者：Chen Erjian;Yu Jianting;Xu Yongrui;Li Zeyu;South China University of Technology,School of Electric Power; 关键词：专用过冷 ; 制冷量增量 ; 吸收-压缩 ; 转换规律 英文关键词：dedicated subcooling;;increase of cooling output;;absorption-compression;;conversion relationship 中文刊名：ZLDT 英文刊名：Refrigeration and Air-Conditioning 机构：华南理工大学电力学院; 出版日期：2019-01-28 出版单位：制冷与空调 年：2019 期：v.19 基金：广东省自然科学基金项目(2018A030313310) 语种：中文; 页：ZLDT201901008 页数：5 CN：01 ISSN：11-4519/TB 分类号：42-46

摘要

本文以试验方法研究带专用过冷装置的蒸气压缩式制冷系统的热力特性以及过冷量与制冷量增量之间的转换规律。结果显示,在膨胀阀固定开度的运行模式下,由于节流阀压降在过冷进口条件下降低的原因,压缩系统发温度、冷凝温度上升、过热度下降与系统总制冷量增大。因此,与相同工况下的无过冷系统相比,制冷量增量可超过过冷量。当过冷量从2.5 kW上升至3.4 kW时,制冷量增量与过冷量比值RICOSP由1.78逐渐减小至1.65。
        The paper is mainly about thermodynamic analysis and conversion relationship that between subcooling power and increase of cooling output in vapour compression chiller with dedicated subcooling,through experimental method.Results show that subcooling leads to increase of evaporating temperature and condensing temperature when the aperture of expansion valve was fixed,as well as the decrease of degree of superheat and cooling output promotion.The main reason is pressure drop of subcooled liquid through the throttling valve will decrease.Therefore,compared with compression system without subcooling in the same condition,increase of cooling output could surpass the amount of subcooling power.When subcooling power varied from 2.5 kW to 3.4 kW,RICOSP decreases from 1.78 to 1.65.

引文

[1]YU S,EOM J,EVANS M,et al.A long-term,integrated impact assessment of alternative building energy code scenarios in China[J].Energy Policy,2014,67:626-639.
    [2]PEREZ-LOMBARD L,ORTIZ J,POUT C.A review on buildings energy consumption information[J].Energy and Buildings,2008,40(3):394-398.
    [3]KANNAN N,VAKEESAN D.Solar energy for future world:-A review[J].Renewable and Sustainable Energy Reviews,2016,62:1092-1105.
    [4]ZhAI X Q,WANG R Z.A review for absorbtion and adsorbtion solar cooling systems in China[J].Renewable and Sustainable Energy Reviews,2009,13(6-7):1523-1531.
    [5]QURESHI B A,ZUBAIR S M.Mechanical sub-cooling vapor compression systems:Current status and future directions[J].International Journal of Refrigeration,2013,36(8):2097-2110.
    [6]LLOPIS R,CABELLO R,SNCHEZ D,Torrella E.Energy improvements of CO2transcritical refrigeration cycles using dedicated mechanical subcooling[J].International Journal of Refrigeration,2015,55:129-141.
    [7]XU Y,JIANG N,PAN F,et al.Comparative study on two low-grade heat driven absorption-compression refrigeration cycles based on energy,exergy,economic and environmental(4E)analyses[J].Energy Conversion and Management,2017,133:535-547.
    [8]LI Z,CHEN E,JING Y,et al.Thermodynamic relationship of subcooling power and increase of cooling output in vapour compression chiller[J].Energy Conversion&Management,2017,149:254-262.
    [9]SIMOES-MOREIRA J R,BULLARD C W.Pressure drop and flashing mechanisms in refrigerant expansion devices[J].International Journal of Refrigeration,2003,26(7):840-848.