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In this paper, the effect of reflector width on the performance of Linear Fresnel Reflector (LFR) concepts with horizontal and vertical absorber is examined. A theoretical model encompassing all the governing parameters is developed by taking into account the intricate phenomenal interdependencies and influences of parameters on the designs output. The designed and subsequently realized test LFR system with horizontal and vertical absorbers are evaluated major from the insight of concentration ratio. Two systems fitted with horizontal and vertical absorbers with reflectors of variable width arrangements have been investigated. The parameters for these two systems are derived from their geometrical representation. Further, effect of different design parameters on the concentration ratio for both the systems is thoroughly investigated. Experiments and their performance are evaluated based on the concentration ratio. The design procedures and the characterization methods have been summarized. The formulae being iterative in nature are solved computationally using programs written in MATLAB. The formulae are unable to yield a single solution; instead of they give a set of solutions when each of the system parameters is width of reflector plates, number of reflector plates, land area constraints is varied. Optimal design parameters are selected from the solutions which in turn minimizes the material and land requirements. This procedure is repeated for the two different configurations and thermal analysis is performed in terms of concentration ratio. Optimal design parameters are selected by computing and plotted in graph. The distribution of Local Concentration Ratio (LCR) on the surface of the horizontal and vertical absorbers for both the designs is investigated using analytical technique. The angular error is modelled using Gaussian distribution and its impact on the LCR is also analysed. The final observations are recorded and their outcome emphasizes that the horizontal absorber with varying width outperforms the system with vertical absorber with varying reflector width.

Performance analysis of linear fresnel reflector concentrating solar system with horizontal and vertical absorber with varying width of reflector