Modeling and dynamic characteristics of nocturnal radiation system with water tank cooling storage

Taking a nocturnal radiation refrigeration system with tank cooling storage as a research object, presents a numerical heat transfer model of nocturnal radiator and a water tank stratification cooling storage model based on transient heat balance theory. Analyses the dynamic operating characteristics in cooling season（from May to September）of Chongqing. The results indicate that the operating process of the nocturnal radiation system with tank cooling storage has two stages: initial stage and cooling stage. The cooling capacity of nocturnal radiator increases rapidly in the initial stage influenced by initial system temperature and the water tank stratification, and so on. In the cooling stage, the cooling capacity and the storage capacity decrease because of the decreased water temperature of the cooling media.