Cross season regeneration analysis of antifreeze of heat source tower

Proposes an antifreeze concentration and regeneration method of heat source tower without additional energy consumption: the low concentrated antifreeze used in winter is stored as cooling liquid of refrigeration system in summer, and dewatered and concentrated at the same time. Establishes a mathematical model of heat and mass exchange between air and solution in the heat source tower. The results show that the mass concentration of solution, relative humidity of air, air flow, solution flow, inlet air temperature and inlet solution temperature significantly impact on the evaporation of water in the solution. During the solution concentrating and regeneration operation of the heat source tower, the supplement of solution has little influence on the regeneration time. Taking a heat source tower of an office building in Nanjing as an example, the calculation shows that it takes about 8 days to complete the concentration and regeneration of all solutions, which means that the method of the antifreeze concentration and regeneration is feasible.