摘要
本文对低温高湿环境下的翅片管换热器结霜特性进行了实验研究,分析了进风温度、相对湿度对换热器结霜量、霜层厚度、管壁温度以及蒸发温度的影响。实验结果表明:换热器表面结霜量随着时间呈线性增长,霜层厚度随着时间的变化分为线性增长段和加速增长段,管壁温度和蒸发温度随着时间的变化分为缓慢下降段和快速下降段。同时,霜层厚度、结霜量随着进风温度的升高和相对湿度的增大而增大,换热器管壁温度和蒸发压力随着进风空气温度的降低和进风相对湿度的增加而降低。
The effects of the outdoor air temperature and humidity on the frosting characteristics of the fin-tube evaporator coils under the low temperature and high humidity were investigated experimentally.The effects of the outdoor air temperature and humidity on frost mass accumulation,frosting thickness,tube wall temperature and evaporation temperature were analyzed.The experimental results indicate that the frost accumulation mass increases linearly with the frosting time,but the growth rate of the frost thickness could be divided into two stages:Linear growth and accelerated growth,and the tube wall temperature and evaporation temperature change with time could also be divided into two stages:slow descent and fast descent.At the same time,the frost thickness and frost mass accumulation increase with the increase of the outdoor air temperature and relative humidity,and the tube wall temperature and evaporation pressure of the heat exchanger decrease with the decrease of the outdoor air temperature and the increase of the relative humidity.
作者
陈轶光
方筝
谷志攀
Chen Yiguang;Fang Zheng;Gu Zhipan(College of Civil Engineering&Architecture,Jiaxing University,Jiaxing,314001;Beijing Gas and Heating Engineering Design Institute,Beijing,100032)
出处
《冷藏技术》
2019年第2期15-19,共5页
Journal of Refrigeration Technology
基金
嘉兴市公益应用技术研究计划项目(No.2016AY 13018,2016AY13019)
关键词
翅片管换热器
结霜
霜层厚度
结霜量
fin-tube heat exchanger
frosting
frost thickness
frost mass accumulation
