船舶低温冷库融霜对比试验研究

船舶伙食冷库的低温库风机盘管结霜会恶化蒸发器换热性能,影响冷藏食品品质,因此对低温库蒸发盘管必须定期融霜。船舶伙食冷库低温库一般采用热气融霜和电热融霜2种方式,经相同试验工况对比,热气融霜耗时短,效率高,库房内温度波动小,节能效果明显;低温库温度越低,热气融霜的节能效果也就越突出。对船舶冷库设计及融霜控制方式的选择具有重要借鉴意义。

Comparative Experimental Research on the Defrosting of Marine Low Temperature Cold Storage

Frosting of the fan coils in the marine food cold storage low temperature rooms will deteriorate the heat exchange performance of the evaporator,and will influence the quality of frozen food.Therefore,it is necessary to defrost the low temperature room evaporator fan coils regularly.Usually the hot gas or the electricity defrosting method is used for the cold storage.Based on the experimental comparison under same working conditions,hot gas defrosting is found to cost less time with a higher efficiency;and the temperature vibration inside the storage room is small while the energy saving effect is quite obvious with the feature that the lower the storage room temperature,the better the energy saving performance.This research provides valuable reference for the design of marine cold storage and for the selection of defrosting control scheme.