HYBRID PRESSURIZED AIR RECEIVER FOR THE SUNSPOT CYCLE

The Solar Thermal Energy Research Group (STERG) at Stellenbosch University is currently performing research on combined Brayton/Rankine cycle (called SUNSPOT) and the hybrid pressurized air receiver forms part of this research. The receiver concept is based on the well-established tubular receiver and open volumetric receiver technologies. It aims to eliminate the use of pressurized quartz window, whilst achieving high efficiencies and outlet air temperatures. Various receiver types have been outlined from which the hybrid receiver was derived and receiver concepts with close resemblance have been reviewed. Also a first principle energy balance has been set up to show the effect of reducing the convection and radiation losses on the receiver efficiency.

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