Abstract: This paper presents the simulation of a solar-powered continuous adsorption air-conditioning system with the working pair of silica gel and water.In order to make the adsorption system more suitable to using solar energy for cooling continuously during daytime, a new adsorption system without refrigerant valves was developed in SJTU recently.By using this system, such problem as pressure drop along refrigerant circuit could be resolved.The frequent switches of refrigerant valves could also be eliminated.The daytime simulation results (from 6:00AM to 18:00) demonstrated that by using 40 m² solar collector area, the adsorption system could supply a fairly steady cooling output about 5—8 kW with system COP over 0.2 all the time.Based on the results, parametric study was also made to optimize the design.The simulation results and theoretical analysis could provide guidance for practical work.