One of the cleanest and most efficient solar collector systems is flat plate collector, which has applications in hot water production, drying, among others. Flat collectors have improved terms both their structural configurations working fluids. Several studies verified comparatively higher efficiency nanofluid-based collectors, relative to that other thermal oils. Additionally, influence seve...

Energy and exergy (EnE) efficiencies are considered the most important parameters to compare performance of various thermal systems. In this paper, an analysis was carried out for EnE a flat plate solar collector (FPSC) using four different kinds nanofluids as flowing mediums, namely, Al2O3/water, MgO/water, TiO2/water, CuO/water, compared with water medium (traditional base fluid). The made na...

Hybrid photovoltaic/thermal (PV/T) collector, combining photovoltaic cells with a solar thermal collector, can simultaneously convert solar energy into electricity and heat energy. In this paper, a novel photovoltaic/thermal integrated heat pump (PV/T-HP) system was developed, in which the PV/T collector also acted as evaporator of heat pump. Two types of PV/T collectors with conventional coppe...

Various external-recycle configurations of multi-pass flat-plate solar air collectors were studied theoretically to examine the optimal thermal performance under same working dimension and operation conditions. An absorber plate insulation sheet implemented horizontally vertically, respectively, into an open rectangular conduit conduct a recycling four-pass operation, which device lengthens flo...

Stagnation is the transient state of a solar thermal system under high irradiation where useful gain zero. Both flat-plate collectors with selective absorber coatings and vacuum-tube exhibit stagnation temperatures far above saturation temperature glycol-based heat carriers within range typical pressures. Therefore, always associated vaporization propagation vapor into pipes circuit. It therefo...