热泵系统中R134a/润滑油流型的可视化研究  

Visualization research of flow patterns of R134a/lubricating oil in the heat pump system

作　　者：巨福军[1] 任鹏翔 范晓伟[1] 宋昊展 周晓磊 张清志 冯臻博 JU Fujun;REN Pengxiang;FAN Xiaowei;SONG Haozhan;ZHOU Xiaolei;ZHANG Qingzhi;FENG Zhenbo(School of Energy and Environment,Zhongyuan University of Technology,Zhengzhou 450007,China;School of Civil Engineering,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]中原工学院能源与环境学院,郑州450007 [2]郑州大学土木工程学院,郑州450001

出　　处：《流体机械》2022年第11期14-19,共6页Fluid Machinery

基　　金：国家自然科学基金项目(52076219);河南省青年科学基金项目(212300410317);河南省科技攻关计划项目(222102320076);中原工学院青年人才创新能力基金项目(K2020QN013);建筑安全与环境国家重点实验室暨国家建筑工程技术研究中心开放基金项目(BSBE2020-8)。

摘　　要：为了获得系统性能与制冷剂/润滑油流型的对应关系,基于制冷剂/润滑油流型可视化试验系统,对比分析了不同工况下过热度对蒸发器出口水平管和竖直管内R134a/润滑油流型的影响规律,并试验研究了工况2下热泵系统循环性能随过热度的变化规律。结果表明:在0~15℃左右的过热度范围内,3种工况下R134a/润滑油在水平管内均会出现相同的4种流型,而在竖直管内则均会出现相同的3种流型;R134a/润滑油在水平管和竖直管内流型(除分层环状流外)对应的过热度范围和流型转变过热度(除第一水平流型转变过热度外)均受热源进口温度的显著影响;工况2下系统COP和制热量均在过渡状态时获得较大值,并在第一水平流型转变过热度(0.2℃)处分别获得最大值5.348,4.386 k W。Based on the visualization experimental system of refrigerant/lubricating oil flow pattern, the effects of the superheat on the flow patterns of R134a/lubricating oil in the horizontal tube and vertical tube at the evaporator outlet under the different conditions were compared and analyzed and the variation law of the system cycle performances of heat pump with the superheat under the working condition 2 was studied experimentally in order to obtain the corresponding relationship between the system performances and the flow patterns of refrigerant/lubricating oil. The results show that in the range of about 0~15 ℃ superheat, the same four flow patterns of R134a/lubricating oil will appear in the horizontal tube under three working conditions, while the same three flow patterns will appear in the vertical tube;The heat source inlet temperature has a significant effect on the corresponding superheat ranges of the flow patterns(except for the stratified annular flow)of R134a/lubricating oil in the horizontal tube and vertical tube and the flow pattern transition superheat(except for the first horizontal flow pattern transition superheat);Under the condition 2, the system obtains the higher COP and heating capacity in the transition state, and the maximum COP and heating capacity are 5.348 and 4.386 kW at the first horizontal flow pattern transition superheat(0.2 ℃), respectively.

关 键 词：R134a/润滑油 蒸发器出口 流型可视化 过热度 热泵系统 

分 类 号：TH3[机械工程—机械制造及自动化]