Thermal conversion of solar energy may be used for heating and cooking. Using locally available materials, we have designed, constructed and utilized a conical parabolic solar concentrator. With a concentration ratio of 56, an optimum efficiency of ~4% was recorded on a clear day and of 1% on a cloudy day. Our solar concentrator yields a minimum temperature of ~40 °C and a maximum temperature above 95 °C.
Energy 12/1988; 13(12):885–887. DOI:10.1016/0360-5442(88)90054-0