Efficiency Determination of Tubular Solar Receivers in Central Receiver Systems

Abstract

This paper describes a method for the efficiency determination of a cavity receiver using the example of the solar hybrid gas turbine system SOLUGAS. Major focus is given on the improvement of a new approach of the solar flux density determination based on a measurement-supported simulation technique where an acceptable uncertainty of the solar input power of 1.3%. . .+6.3% is achieved. For the thermal evaluation an uncertainty of 2.4% is determined that leads to an overall uncertainty of the thermal receiver efficiency of 2.8%. . .+7.7%. Detailed uncertainty propagation is presented and conclusions discussed.