毛细管内R410A两相流动阻力特性实验研究

doi:10.19784/j.cnki.issn1672-0172.2020.06.014

家电科技 ›› 2020, Vol. 0 ›› Issue (6): 82-85.doi: 10.19784/j.cnki.issn1672-0172.2020.06.014

毛细管内R410A两相流动阻力特性实验研究

任滔^1,2, 肖成进¹, 刘江彬¹, 柴婷^1,2, 孟庆良¹, 宋强¹

1.青岛海尔空调电子股份有限公司山东青岛 266000;
2.海尔（上海）家电研发中心有限公司上海 201100

出版日期:2020-12-01 发布日期:2020-12-31
通讯作者: 刘江彬 liujiangbin@haier.com
基金资助:
本论文由国家重点研发计划项目“长江流域建筑供暖空调解决方案和相应系统”（课题编号：2016YFC0700304）资助

Experimental investigation on the R410A two phase pressure drop in capillary tubes

REN Tao^1,2, XIAO Chengjin¹, LIU Jiangbin¹, CHAI Ting^1,2, MENG Qingliang¹, SONG Qiang¹

1. Qingdao Haier Air Conditioning Electronics Co., Ltd. Qingdao 266000;
2. Haier (Shanghai) Home Appliance R&D Center Shanghai 201100

Online:2020-12-01 Published:2020-12-31

摘要/Abstract

摘要： 毛细管广泛应用于分体式空调、多联式空调（热泵）机组的室内和室外换热器的分流流量调节,准确预测毛细管内两相流制冷剂的压降特性是快速实现换热器分流毛细管匹配的关键。提出了基于近似积分实现变密度条件下毛细管内两相流摩擦阻力因子的计算方法,并通过实验方法研究毛细管内径对R410A制冷剂在毛细管内的两相流摩擦阻力因子的变化规律。结果表明：毛细管中的两相流摩擦阻力因子随制冷剂Re数的增大而减小,这与经典的Churchill 模型预测的趋势一致,但其数值比Churchill模型增大1倍以上,且随着毛细管内径的减小,其管内两相流动摩擦阻力因子f也越小。

关键词: R410A, 毛细管, 两相流, 压降, 实验

Abstract: Capillaries are widely used in the shunt flow regulation of indoor and outdoor heat exchangers of split air conditioners and multi-split air conditioning (heat pump) units. Accurate prediction of the pressure drop characteristics of two-phase flow refrigerants in capillary tubes is the key to quickly realize shunt capillary matching of heat exchangers. Propose. a method for calculating the friction resistance factor of two-phase flow in capillary tube under the condition of variable density based on approximate integral is proposed, and the effect of capillary diameter on the friction resistance factor of R410a refrigerant in capillary tube is studied experimentally. The results show that the friction resistance factor of the two-phase flow in the capillary tube decreases with the increase of the refrigerant Re number, which is consistent with the trend predicted by the classical Churchill model, but its value is more than twice that of the Churchill model, and the friction resistance factor f of the two-phase flow in the capillary tube decreases with the decrease of the inner diameter of the capillary tube.

Key words: R410A, Capillary tube, Two phase, Pressure drop, Experiment

中图分类号:

TB657.2

任滔, 肖成进, 刘江彬, 柴婷, 孟庆良, 宋强. 毛细管内R410A两相流动阻力特性实验研究[J]. 家电科技, 2020, 0(6): 82-85.

REN Tao, XIAO Chengjin, LIU Jiangbin, CHAI Ting, MENG Qingliang, SONG Qiang. Experimental investigation on the R410A two phase pressure drop in capillary tubes[J]. Journal of Appliance Science & Technology, 2020, 0(6): 82-85.

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毛细管内R410A两相流动阻力特性实验研究

Experimental investigation on the R410A two phase pressure drop in capillary tubes

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