Application of porous medium for efficiency improvement of a concentrated solar air heating system

2017 International Conference on Power and Energy Engineering

Prasartkaew, Boonrit^1

Combustion and Solar Energy Laboratory (CASE Lab.), Faculty of Engineering, Rajamangala University of Technology Thanyaburi, Klong 6, Thanyaburi, Patumthani

12110, Thailand^1

关键词: Comparative studies;    Concentrated solar;    Efficiency improvement;    High temperature air;    Investment costs;    Porous medium;    System efficiency;    Thermal efficiency;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/114/1/012006/pdf
DOI  :  10.1088/1755-1315/114/1/012006

来源: IOP

【 摘 要 】

The objective of this study is to evaluate the thermal efficiency of a concentrated solar collector for a high temperature air heating system. The proposed system consists of a 25-m2focused multi-flat-mirror solar heliostat equipped with a porous medium solar collector/receiver which was installed on the top of a 3-m tower, called 'tower receiver'. To know how the system efficiency cloud be improved by using porous medium, the proposed system with and without porous medium were tested and the comparative study was performed. The experimental results reveal that, for the proposed system, application of porous medium is promising, the efficiency can be increased about 2 times compared to the conventional one. In addition, due to the porous medium used in this study was the waste material with very low cost. It can be summarized that the substantial efficiency improvement with very low investment cost of the proposed system seem to be a vital measures for addressing the energy issues.