Optimization of process parameters of a solar parabolic trough in winter using Grey-Taguchi approach

Among the renewable sources of energy, solar energy offers a practical solution for the energy problem which is clouding the prospects of mankind. The present paper deals with the experimental investigation of parameters of a solar parabolic trough in winter conditions and to obtain optimum process parameters by Grey Relational Analysis. The experiments were planned using Taguchi’s L9 orthogonal array. In this study, parabolic collector parameters namely reflector materials, Absorber materials, Positions of the Absorber tube and Angles of the absorber tube are optimized with the consideration of multi responses such as Temperature, Enthalpy, Optical efficiency and Thermal efficiency. A grey relational grade is obtained from the grey analysis. Based on the grey relational grade, optimum levels of parameters have been identified. Finally Conformation test is conducted to validate the test result. The experimental results have shown that, the use of Vacuum glass tube as a absorber gives best result.