Energy efficiency analysis of a trapezoidal solar pond

1st International Global on Renewable Energy and Development

Wu, Dan^1,3 ; Liu, Hongsheng^2,3 ; Jiang, Linsong^2,3 ; Wang, Jiansheng^3

760th Research Institute of China Shipbuilding Industry Corporation Dalian, 116013, China^1

Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, Dalian

116024, China^2

Key Laboratory of Efficient Utilization of Low and Medium Grade Energy Tianjin University, Ministry of Education of China, Tianjin

300072, China^3

关键词: Available energy;    Convective zone;    Energy efficiency analysis;    Energy performance;    First law of thermodynamics;    Lower convective zones;    Nonconvective zone;    Total energy;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/100/1/012100/pdf
DOI  :  10.1088/1755-1315/100/1/012100

来源: IOP

【 摘 要 】

In this paper we present an investigation of the energy performance of a mini trapezoidal solar pond (with surface of 2.4m×2.4m and depth of 1.5 m) which was built in Dalian, China. The pond was filled with salty water to form the upper convective zone (UCZ), the non-convective zone (UCZ), and the lower convective zone (LCZ). Energy efficiency, the ratio of available energy to the total energy, was defined basing on the first law of thermodynamics at each zone of the solar pond. The energy efficiency of the three layers were analyzed separately accounting to the simulation results of the temperature distribution in the trapezoidal solar pond. It shows that the energy efficiency of the solar pond is relatively high at the beginning of the operation, and the energy efficiency of the UCZ is the lowest while the LCZ is the highest.