Experimental Investigations on Multi-Passage Finned Type Solar Receiver
摘要
A newly developed multi-passage finned cylindrical shaped solar receiver is hereby examined experimentally. The solar receiver is formed using multiple copper plates and using metallic as well as non-metallic gaskets. The provision of gaskets creates multiple passages through which heat transfer fluid is allowed to flow. The incident radiation meeting at the focal location generates high temperature due to large concentration ratio. The internally extended surfaces of copper plates are blackened, which act as fins and absorb solar radiation concentrated at the focus. The fins are embedded deep into the high-temperature-focal-zone. The working fluid flows through the adjacent passages in opposite directions. The focus is located axially and radially in the middle of the receiver. So, the gradual heating of working fluid keeps a check on the operating temperature of the receiver that loses less energy to the outer ambience and improves efficiency of solar parabolic dish collector system. Present novel design of receiver exhibited an efficiency of about 23–69%, for the selected flow range from 0.006 to 0.008 kg/s. The present study introduces innovative concepts in the fields of renewable energy and thermal sciences, highlighting the potential of a novel receiver design to enhance the efficiency of solar parabolic dish collector systems. Efficient solar systems can be used for so many agricultural as well as industrial applications. It opens new avenues in this domain.