Analytical and experimental determination of radiation and temperature distributions inside solar receivers

2014 A cooled cubic cavity receiving a non uniform concentrated solar radiation is modelized, using the diffuse and semi-gray surface hypothesis and the net radiation method equations. Two more equations corresponding to the heat transfer to a cooling fluid permit to define a heat balance. Thus at thermal equilibrium, net fluxes and temperatures inside the cavity are calculated. An air-cooled solar receiver has been set up at a 6 kW solar furnace. Flux and temperature measurements have been performed for different coatings of the inside surface. Theoritical and experimental results are then compared and discussed. Revue Phys. Appl. 15 (1980) 139-142 FÉVRIER 1980, PAGE Classification Physics Ahslructs 44.50