中间压力对单机双级旋转式压缩机性能的影响

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英文篇名：Effect of Intermediate Pressure on Performance of Single-machine Two-stage Rotary Compressor 作者：余冰 ; 魏会军 ; 杨欧翔 英文作者：Yu Bing;Wei Huijun;Yang Ouxiang;Gree Electric Appliances Inc.of Zhuhai;National Engineering Research Center of Green Refrigeration Equipment;State Key Laboratory of Air-conditioning Equipment and System Energy Conservation; 关键词：双级旋转式压缩机 ; 中间压力 ; 循环方式 英文关键词：two-stage rotary compressor;;intermediate pressure;;cycle mode 中文刊名：LCJZ 英文刊名：Journal of Refrigeration Technology 机构：珠海格力电器股份有限公司;国家节能环保制冷设备工程技术研究中心;空调设备及系统运行节能国家重点实验室; 出版日期：2019-03-15 出版单位：冷藏技术 年：2019 期：v.42;No.166 语种：中文; 页：LCJZ201901013 页数：6 CN：01 ISSN：11-2090/TS 分类号：47-52

摘要

为了明确中间压力对双级旋转式压缩机的影响,依据质量与能量守恒定律,提出带闪蒸器补气的系统具有三种循环方式,即气体倒流、补气正流和补气带液,并建立了各循环的热力学分析模型,通过模拟分析与试验验证,研究了中间压力对系统循环方式与压缩机性能的影响。研究表明,补气带液循环与补气正流循环相比,系统制冷/制热COP提升幅度(与单级压缩循环相比)增大了3%～4%,系统制冷/制热能力提升幅度提高1%～3%;气体倒流循环方式下,使中间压力接近吸气压力,可实现COP与关闭补气时相当,制冷量降低27%～28%,在轻负荷需求下可通过小排量、高频率的运行方式提升能效。
        In order to clarify the influence of intermediate pressure on two-stage rotary compressor, according to the law of conservation of mass and energy, three kinds of cycle modes are proposed for the vapor injection system with flash tank, namely gas backflow, vapor injection flow and vapor-liquid injection flow. Thermodynamic models of each cycle modes are established, and the influence of intermediate pressure on the cycle mode and compressor performance was studied through simulation and experiment.The results show that, the increase of cooling/heating COP of the vapor-liquid injection flow cycle mode is increased by 3%～ 4%compared with the vapor injection flow cycle mode, and the increase of cooling/heating capacity of is increased by 1%～ 3%. Under the gas backflow cycle mode, if the intermediate pressure is close to the suction pressure, the COP can be equivalent to the cycle without vapor injcion, and the capacity can be reduced by 27%～28%. So the efficiency can be improved through the operation mode of small displacement and high frequency under the light load conditions.

引文

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