风冷式太阳能吸收式制冷机性能模拟研究

Simulation of an Air-cooled Solar-assisted Absorption Air Condtitioning System

在环境温度和太阳辐射动态变化的情况下,对制冷量为5 kW的风冷式太阳能吸收式制冷机的性能进行了模拟,得出了集热器出口水温和热水储槽温度随时间变化的规律曲线以及在此规律的影响下吸收式制冷机的性能曲线。模拟结果表明风冷式太阳能吸收式制冷机在理论上是切实可行的,但是环境温度的变化以及风冷系统的散热能力对系统性能有较大的影响,环境温度的升高会使需要风冷降温的冷凝器、吸收器温度升高,从而提高了发生温度的要求,这不利于太阳能的利用和系统的制冷。为此需要强化冷凝器和吸收器的散热效果,来降低境温度对系统的不利影响。

An air - cooled solar - assisted absorption air conditioning system with cooling capacity of 5 kW was simulated as the solar irradiation and temperature of environment varied continuously. From the simulation, the performance of air conditioning system, the temperature variation of hot water storage and the water out of the flat plate solar collector were obtained. The simulation shows that this air - cooled solar - assisted absorption air conditioning system is feasible, but the variation of the air temperature and the air cooling system affects the air conditioning system. The increase of the air temperature would increase the temperature of condenser and absorber, eventually the generatng temperature. This would influence the application of solar energy. So it is important to enhance the heat transfer of the air cooling system in order to reduce the adverse effect on the system.