冰箱蒸发器分段热源除霜实验与仿真研究
Experimental and numerical study on dynamic characteristics of distributed heaters defrosting for refrigerator evaporator
杨易坤 1黄东 1谌文辉 1赵日晶1
作者信息
- 1. 西安交通大学制冷与低温工程系西安 710049
- 折叠
摘要
针对大高宽比的风冷冰箱细高蒸发器竖直方向融霜同步性差的问题,本文对加热器分段优化布置下蒸发器除霜性能进行实验与仿真研究.实验结果表明,上段电加热器在8/19排的最佳布置位置下,竖直方向除霜同步性得到明显改善,融霜滞后时间,冰箱日耗电量和冷冻室箱温回升分别降低10 min,1.72％和1.1℃.仿真结果表明,分段热源在除霜前期与后期拥有更高的除霜速度和除霜效率.除霜时间的缩短使得蒸发器吸热量和冷冻室漏热量出现明显下降,耗电量随之减小.
Abstract
To solve the problem of poor vertical defrosting synchronization of the frost-free refrigerator evaporator with a large aspect ratio,experimental and numerical studies were carried out on the defrosting performance of the distributed heaters with the optimal arrangement.The results show that the vertical defrosting synchronization is significantly improved with the opti-mal arrangement of the upper section heaters in 8/19 rows,the defrosting lag time,the daily power consumption and the freezer temperature rise are reduced by 10 min,1.72％and 1.1 ℃,respectively.The numerical results show that,the distributed heater has higher defrosting speed and defrosting efficiency in the early and late defrosting stages.The shortening of defrosting time makes the heat absorption of the evaporator and the heat leakage of the freezer decrease significantly,which is the main reason for the reduction of power consumption.
关键词
风冷冰箱/除霜性能/分段加热器/动态仿真Key words
Frost-free refrigerator/Defrost performance/Distributed heater/Dynamic simulation引用本文复制引用
出版年
2024
NETL
NSTL
万方数据