The testing and production of solar collectors with parabolic reflector

Since flat surface solar collectors are not suitable for processes like absorption cooling, distillation end vapour production etc. vhich require »-ediur: operation temperature, constant parabolic reflector collectors are needed. In this study t 3 different types of parabolic reflector solar collectors had been produced in Heating and Ventilation Department. The collectors had been tried in natural circulation, closed system, open system and continuous flow conditions» In the first part of the experiments, the depot water temperatures had been measured daily and general average perfornar.ee coefficents had been _., o deteroined. :he temperature of depot vater had reachec to od C in A collector, to 50 £ in B collector and to 62 C in C collector. The change of performance according to Ee^ number had been determined sising continuous end different flcv rates. Performance coefficents up to 0.30 had been obtained in the experiments. As a result,, collector' A' had been preferred since it has shown better perfornance than other collectors vhich all vere directed to south vith 30 angle and having î a surface area. Ill