杨凌晓,魏新利,张东伟,秦翔,赵玲华,李慧

• 1:郑州大学 化工与能源学院 热能系统节能技术与装备教育部工程研究中心，河南 郑州 450001

摘要(Abstract)：

跨临界CO₂热泵因其出色的环保性和节能性在近年来得到了国内外的广泛关注。由于CO₂工质特性的影响，工质的气冷器出口状态对系统性能的影响很大。针对带回热器的空气源跨临界CO₂热泵热水系统，通过调节节流阀开度来改变压缩机排气压力，对工质气冷器出口状态的变化规律及其对系统产生的影响进行了实验研究。结果表明：在一定的排气压力范围内，气冷器工质出口温度先短暂升高，然后快速下降，最终趋于稳定。受到气冷器工质出口状态变化的影响，系统制热性能系数（COP）存在最优值。当气冷器工质出口温度接近进水温度后，系统达到最大制热量。此外，控制适宜的气冷器工质出口温度可以使系统的COP和制热量均取得较大值。研究结果对带回热器的跨临界CO₂热泵系统的设计和深入研究具有参考意义。

关键词(KeyWords)： 跨临界CO₂热泵;气冷器;回热器;制热量;制热性能系数

Abstract:

Keywords:

基金项目(Foundation): 河南省重点科技攻关项目（142102210072）；国家自然科学基金（51706208）。

作者(Author): 杨凌晓,魏新利,张东伟,秦翔,赵玲华,李慧

DOI: 10.3969/j.issn.1003-9015.2019.05.004

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