Performance of the Directly-Irradiated Annular Pressurized Receiver (DIAPR) Operating at 20 Bar and 1,200°C

The Directly Irradiated Annular Pressurized Receiver (DIAPR) is a volumetric (directlyirradiated) windowed cavity receiver, designed for operation at a pressure of 10 ‐30 bar, exit gas temperature of up to 1,300°C, and aperture radiation flux of up to 10 M W/m 2 . This paper presents test results obtained under various irradiation conditions and flow rates. Inlet aperture flux was up to 5 M W/m 2 ; exit air temperatures of up to 1,200°C were obtained, while operating at pressures of 17 ‐20 bar. Estimated receiver efficiency in these tests was in the range of 0.7‐0.9. The absorber and window temperatures were 200‐400°C below the permitted maximum, indicating that higher air exit temperatures are possible. @DOI: 10.1115/1.1345844#