In this paper,through researching and analyzing the temperature control for the stream maintenance of concrete box girder in four stages,the temperature control parameters for stream maintenance of concrete box girder in winter are offered to guide precasting concrete box girder on site and ensure the precasting quality of the girder.

Combining with the vapour-cycling cooling system and the air-cycling cooling system,the paper puts forward an engineering plan for pod thermal design.

Experiment unit for compressor abnormal work test based on refrigeration vapor cycling method;