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In this study, a hybrid solar collector was been devised to simultaneously produce warm water and air using finned tubes for the heat absorption plane. Finned tubes are often used in heat exchangers. An experiment was conducted both in the laboratory using an artificial solar light source and the open air which utilizes direct sunlight. The outdoor experiment produced similar values. Maximum the overall solar collection efficiency was 74-79%. Both the water and air temperatures increased by about 5degC. So this hybrid solar collector would prove to be a suitable water heating and supply device for general public use
Hidetoshi Aoki (Mon,) studied this question.