Solar Air Heater Duct with Wavy Delta Winglets: Correlation Development and Parametric Optimization: A Review
Solar air heater is the most popular device in the space heating and industrial processes applications. But solar air heater has a lower heat-transfer coefficient between the absorber plate and the air stream, which results in a lower thermal efficiency of the heater. The solar air heaters efficiency can be affected by various parameters such as collector length, number of channels, depth of channels, type of absorber plate, number and material of glass covers, air inlet temperature and air velocity. In this work, a review of the available literature on solar air heater, for the performance improvement is presented; the review is made to allow a discussion based on fins, baffles & obstacles, proposed by various researchers. Considering the parameters, this is enhancing the performance of a solar air heater.
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