中温太阳能驱动的分布式功冷联产系统

A New Power/Cooling Cogeneration System Driven by Middle-Temperature Solar Thermal Energy

本文提出了一种中温太阳能驱动的分布式功冷联产系统,将350℃的槽式太阳能集热系统与基于正逆循环耦合的氨/水功冷联产系统有机结合,实现功冷联产.太阳热能首先驱动一个混合工质朗肯循环做功,透平排气直接输送到精馏塔底部驱动吸收式制冷循环制取-10℃冷能,从而实现了太阳热能的梯级利用。系统模拟结果表明,系统等效太阳能发电效率为22.6%,(火用)效率为14.1%。本文提出的新系统为高效利用中温太阳热能提供了一种新方法。

This paper proposes a new power/cooling cogeneration system driven by middle- temperature solar thermal energy. A parabolic trough solar energy collection system, an am- monia/water Rankine cycle, and an ammonia/water absorption refrigeration cycle are integrated rationally, The collected solar thermal energy at 350~C is utilized to generate superheated ammo- nia/water vapor and then the vapor expands in a turbine to generate power. The exhaust vapor of the turbine is recovered by the absorption refrigeration system to generate cooling energy at -10~C. The new system implements cascade utilization of solar thermal energy in the Rankine and refrigeration cycles. Simulation results show that the equivalent solar irradiation energy to power efficiency reaches 22.6% and the exergy efficiency is 14.1%. The proposed system may provide a new method for efficient utilization of middle-teInperature solar thermal energy.