The collector profiles are tested using infrared radiation lamps in the laboratory. (Figure 2,3) The collector reaction to change in the value of heat transfer is measured. Air temperatures and velocities are measured at the bottom (air entry) and top (air exit) of the collector profiles.

The selective coated collector is divided four regions receive radiation from four infrared radiation lamps and ten measurement points are defined from bottom to top. (Figure 4) The bottom and top air temperatures and velocities measurement points of the collector are shown in Figure 5. Air velocity measurement holes on the front face of the collector are given in Figure 6.