Refrigeration system for an environmental test chamber

摘要

An environmental test chamber fast cool down and heat up system. The environmental test chamber fast cool down and heat up system comprises: an environmental test chamber having a fast cool down evaporator and fast heat up condenser coil, wherein the coil is selectively coupled either to receive a hot refrigerant gas flow or to receive a sub-cooled refrigerant flow; a cascade condenser coupled to the environmental test chamber; a primary stage sub-system coupled to the cascade condenser; a secondary stage sub-system coupled to the cascade condenser; and a thermal storage unit coupled to the primary stage sub-system and to the secondary stage sub-system. Wherein the environmental test chamber has an operational temperature down to about 125 F.