The effectiveness of the parabolic dish system (PDS) is greatly affected by heat losses associated with high temperatures. complexity flow and temperature patterns in around cavity receiver makes it a challenging task to determine convective loss from cavity. Various studies have been carried out convection isolated cavities different shapes. In presence structure, free stream wind may affect s...

In this study, a numerical model was developed for prediction of Nusselt number in solar cavity receivers. Thermal oil and water were used as the working fluid. A dish concentrator with different shapes receiver, including hemispherical, cylindrical, cubical, investigated. The receiver studied under same operating conditions internal heat transfer coefficient correlation each receiver. system i...

This article presents a closed form analytical solution to estimate solar receiver surface and fluid temperatures. An approximation its domain of validity (in term the value small parameter) are also proposed. These simple models then applied large cylindrical cavity. Finally, model is an experimental hemispherical coiled

This paper presents a thermal study of cavity receiver designed for Fresnel-type linear solar collector (LFC). The utilizes two-dimensional computational fluid dynamics (CFD) model implemented in ANSYS Fluent. behavior air inside the Fresnel is extensively examined. consists trapezoidal with set six parallel absorber tubes, through which circulates. has aluminum reflectors on inner walls and gl...