强制对流下翅片管蒸发器表面结霜实验
Frosting Surface of Finned Tube Evaporator under Strong Convection
陈清华 1陆育 2关维娟 3季家东 2王建刚4
作者信息
- 1. 安徽理工大学矿山智能装备与技术安徽省重点实验室,安徽淮南 232001;安徽理工大学环境友好材料与职业健康研究院(芜湖),安徽芜湖 241003;广东立佳实业有限公司,广东东莞 523000
- 2. 安徽理工大学矿山智能装备与技术安徽省重点实验室,安徽淮南 232001
- 3. 安徽理工大学数学与大数据学院,安徽淮南 232001
- 4. 广东立佳实业有限公司,广东东莞 523000
- 折叠
摘要
翅片管蒸发器表面结霜是阻碍制冷系统高效运行的主要不利因素之一.利用恒温恒湿箱搭建强制对流下蒸发器翅片管表面结霜可视化实验平台,在环境温度0～8℃、相对湿度55％～75％及迎面风速0.8～2.4m/s时,实时记录霜层动态生长过程,研究了环境温度、相对湿度和迎面风速对霜层生长特性及蒸发器换热性能的影响规律.结果表明:环境温度和迎面风速是影响蒸发器结霜的主要因素,结霜50 min,环境温度为0 ℃的霜层厚度比环境温度为8 ℃的提高了 12.78％,迎面风速为2.4 m/s的霜层厚度比迎面风速为0.8 m/s的提高了 14.66％,结霜量与换热量提高趋势相同.在结霜初期,相对湿度越大,换热量越大;结霜后期,相对湿度越小,换热量越大,并得到了换热量关于环境参数与时间的相关关系.
Abstract
Frosting on the surface of finned tube evaporator was one of the main adverse factors that hindered the efficient operation of refrigeration system.A visual experimental platform for frosting on the surface of finned tube of evaporator under forced convection was built by using constant temperature and humidity chamber.The dynamic growth process of frost layer was recorded in real time with air temperature 0～8 ℃,relative humidity 55％～75％and head wind speed 0.8～2.4 m/s.The effects of ambient temperature,relative humidity and head-on wind speed on frost growth characteristics and heat transfer performance of evaporator were studied.The results show that ambient temperature and head-on wind speed are the main factors affecting frosting of evaporator.When frosting for 50 min,the frost thickness under the ambient temperature of 0 ℃ is 12.78％higher than that under the ambient temperature of 8 ℃,and the frost thickness under the wind speed of 2.4 m/s is 14.66％higher than that under the wind speed of 0.8 m/s.The frost amount and heat transfer increase the same trend.In the early stage of frosting,the greater the relative humidity,the greater the heat transfer.In the later stage of frosting,the lower the relative humidity,the greater the heat transfer.The correlation between the environmental parameters and the time of heat transfer is obtained.
关键词
翅片管蒸发器/可视化/结霜/霜层生长/强制对流Key words
finned tube evaporator/visualization/frosting/frost layer growth/forced convection引用本文复制引用
基金项目
国家自然科学基金(52175070)
安徽理工大学环境友好材料与职业健康研究院研发专项基金资助项目(ALW2021YF12)
出版年
2024
国家科技期刊平台
NSTL
万方数据