Calculation and analysis on transcritical ejector refrigeration cycle with CO2

doi:10.3969/j.issn.0438-1157.2013.07.013

CIESC Journal ›› 2013, Vol. 64 ›› Issue (7): 2400-2404.DOI: 10.3969/j.issn.0438-1157.2013.07.013

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Calculation and analysis on transcritical ejector refrigeration cycle with CO₂

WANG Fei¹, YANG Yong², SHEN Shengqiang²

1. School of Architecture and Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China;
2. Key Laboratory for Sea Water Desalination of Liaoning Province, Dalian University of Technology, Dalian 116024, Liaoning, China

Received:2012-11-29 Revised:2013-02-19 Online:2013-07-05 Published:2013-07-05
Supported by:
supported by Natural Science Foundation of Jiangsu Province of China (BK2011216),the Sailing Plan of China University of Mining and Technology and the Fundamental Research Funds for the Central Universities(2012QNA55).

CO₂跨临界喷射制冷循环计算分析

王菲¹, 杨勇², 沈胜强²

1. 中国矿业大学力学与建筑工程学院, 江苏徐州 221116;
2. 大连理工大学辽宁省海水淡化重点实验室, 辽宁大连 116024

通讯作者: 王菲(1979- ),女,博士,讲师
作者简介:王菲(1979- ),女,博士,讲师。
基金资助:
江苏省自然科学基金项目(BK2011216);中国矿业大学启航计划;中央高校基本科研业务费专项资金项目(2012QNA55)。

Abstract

Abstract: The research on transcritical ejector refrigeration cycle with CO₂ is rarely reported.In this study,a thermodynamic model for a transcritical ejector refrigeration cycle is established.The changes of ejector entrainment ratio,the cycle performance coefficient (COP)and effective performance coefficient (COP_m)with cooler pressure,cooler outlet temperature,heater pressure,heater outlet temperature and evaporation temperature are presented.As the cooler pressure increases,the entrainment ratio of ejector decrease,the cycle COP and COP_m first increase and then decrease,with optimum values at some cooler pressures.As the outlet temperature of cooler increases,both values of COP and COP_m decrease.With the increase of heater pressure,heater outlet temperature and evaporation temperature,the ejector entrainment ratio,the cycle COP and COP_m are improved,while the cycle COP decreases with the increase of heater outlet temperature.

Key words: ejector refrigeration, CO₂, transcritical

摘要： 目前还很少有关于CO₂跨临界喷射式制冷循环的研究。本文对CO₂跨临界喷射制冷循环建立了热力学模型,计算了在不同的冷却压力、冷却器出口温度、加热器压力、加热器出口温度及蒸发温度下,喷射器的喷射系数、跨临界喷射制冷循环性能系数(COP)和有效性能系数(COP_m)的变化趋势。结果表明:随着冷却器压力的升高,喷射器的喷射系数减小,循环的COP 和COP_m值先增大后减小,在某个冷却压力下存在最优值;提高冷却器的出口温度,循环的COP 和COP_m值均降低;提高加热器压力、加热器出口温度及蒸发温度均能增大喷射器的喷射系数和循环的COP_m值。

关键词: 喷射制冷, CO₂, 跨临界

CLC Number:

TK511⁺.3

WANG Fei, YANG Yong, SHEN Shengqiang. Calculation and analysis on transcritical ejector refrigeration cycle with CO₂[J]. CIESC Journal, 2013, 64(7): 2400-2404.

王菲, 杨勇, 沈胜强. CO₂跨临界喷射制冷循环计算分析[J]. 化工学报, 2013, 64(7): 2400-2404.

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Calculation and analysis on transcritical ejector refrigeration cycle with CO₂

CO₂跨临界喷射制冷循环计算分析

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