【摘要】 针对一套已有的低温冷库,设计了一套冷风机隔断装置,通过对冷风机电热和热气这2种不同融霜方式的实验研究,探讨了有无隔断装置两种情况下,加湿量对融霜时间、融霜负荷及融霜过程中对冷风机周围温度场的影响。结果表明:随着加湿量的增加,融霜所需的能量也相应增加,在加湿量为1000g时,融霜能量增加超过18%。电热融霜对冷库温度场破坏程度较大,融霜结束时,库温升高5~10℃。在增加隔断装置后,能耗显著减少,可达20%左右;也大大降低了对库内温度场的破坏,电热融霜时,库温最大变化量降低5℃,对于热气融霜的影响相对较小。更多还原

【Abstract】 Experimental study of electricity defrosting and hot gas defrosting was done based on a lowtemperature cold storage existing.The design of partition device was introduced.The effect of humidifying amount on defrosting time,defrosting load,temperature field around the air-cooler when defrosting were discussed at two kinds of situation with partition device or no.The results show that,with the increasing amount of humidification,defrosting energy consumed also increases accordingly,more than 18% when the humidifying capacity is 1000 g.Electricity defrosting was bigger to the damage degree of cold storage temperature field.The cold storage temperature is increased by 5℃to 10℃.After the partition device was set up,there was a notable energy conservation effect,the temperature field of cold storage was less destroyed.The maximum change of cold storage temperature is decreased by 5℃ with electricity defrosting.The influence of the partition device to hot gas defrosting was relatively smaller.更多还原