A project of using solar-powered liquid desiccant to remove fresh air moisture load in cooling ceiling air-conditioning system is Puts forward,and it is compared with cooling dehumidification project.

Based on the regulation about building thermodynamic characteristics in Design Standard for Energy Efficiency of Public Buildings, taking an office building in Beijing area as an example, calculates the cooling load, fresh air cooling load and cooling consumption.

In this paper,climatic features in hot summer and cold winter area and the characteristics of fresh air cooling load in summer were firstly analyzed.

In this paper,based on analysis of the research results of humidity environments in some cities,the causes of mois tenvironment of the underground structure were discussed and it is pointed out that to calculate the moisture load and use the methods of moisture proofing and dehumidifying is an important way for improvement of the underground structure environment.

Discuses DOAS demand to fresh air humidity ratio and model by rotary wheel removing moisture load,and analyses its scheme and energy consumption of DOAS by rotary wheel removing moisture load based on solar energy regeneration,and result shows a 30% energy saving comparing to cooling dehumidification,and it can supply cooling capacity freely when using directly underground water.