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Convection losses are essential factors in determining thermal power systems performance by using solar concentrators. To achieve optimum thermal performance, the design of the cavity receivers plays a significant role. These cavity receivers come in different shapes like parabolic, spherical, cylindrical, etc., and can be used with solar dish concentrators for process heat applications. In this experimental study, the natural convection loss occurring from a hemispherical cavity receiver is investigated at medium temperature levels, based on the corresponding change in that receiver's inclination. It is found that the heat loss was minimum for 900 and maximum for 00.

Performance characteristics of heat loss of the inverted hemispherical solar concentrator receiver