A theoretical study on low-temperature solar thermal power cycle

作者：Song Jian Zhong^*; Zhang Xiao Song

来源：Journal of Central South University(Science and Technology), 2012, 43(10): 4075-4080.

• Cogeneration systems
• Cycle efficiency
• Cycle performance
• Domestic hot water
• Heat regenerators
• Inlet pressures
• Inlet temperature
• Low temperatures
• Power generation systems
• Power out put
• Solar thermal power
• Theoretical study
• Working cycle
• Working fluid

A low-temperature power generation system based on Rankine cycle is proposed which can efficiently use the heat collected to provide electricity and co-provide certain amount of domestic hot water, and it employs the fluid with low boiling point as the working fluid. In this work, R245fa was selected as the working fluid. The cycle performance was analyzed based on the simulation of the ideal cycle and the working cycle. The effects of some key factors on the system were analyzed. These factors include the expander inlet temperature, the expander inlet pressure and the degree of superheat. Also, the performance of the system with and without a heat regenerator was analyzed. During this work, the power output was fixed at 2.0 kW. And the cycle efficiency increases with the increment of the expander inlet pressure (the expander inlet temperature) while the expander inlet temperature (the expander inlet pressure) is given. And the value of the degree of superheat should be synthetically considered.

• 出版日期2012
• 单位东南大学