结霜对微型冷库性能影响的实验研究  

AN EXPERIMENTAL STUDY OF THE INFLUENCES OF FROST DEPOSITION ON THE PERFORMANCE OF A SMALL COLD STORE

作　　者：刘耀民[1] 刘中良[1] 黄玲艳[1] 勾昱君[2] 

机构地区：[1]北京工业大学教育部传热强化与过程节能重点实验室传热与能源利用北京市重点实验室,北京100124 [2]唐山学院,河北唐山063000

出　　处：《工程热物理学报》2010年第10期1755-1758,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.50376001);北京市科学技术委员会北京市科技计划项目(No.Z07020600290793)

摘　　要：运用一种新的实验方法排除了环境温度变化对微型冷库性能的影响,从而定量研究了单一结霜现象对之造成的影响。研究表明,随着冷库的连续运行,蒸发器排管上形成的霜层厚度不断增加,直至霜层达到充分生长阶段。在冷库运行的后期,由于蒸发器霜层的影响导致冷库的COP平均降低了0.024,相对于无霜条件下降低了3.2%。An innovative experimental method deposition effects on the performance of a small was introduced to quantitatively detect the frost cold store without the requirement of a constant environmental temperature which also had a great influence on the performance. The results indicated that the frost layer continuously grew with time until the so-called later growth period of frost formation during the cold store operation. Thus a significant change of the COP was resulted from the accumulated frost deposition. The experimental data showed that the cold store COP may be decreased by as much as 3.2% over no-frost condition in later running period due to the influence of the frost deposition on the evaporator.

关 键 词：结霜 冷库 蒸发器 COP 

分 类 号：TK124[动力工程及工程热物理—工程热物理]