| 摘要 |
PURPOSE:To enable to increase the collected heat energy without increasing the installation area by a structure wherein selective absorption film treatment is applied on the outer surface of an expansion tank in a closed circuit for heat transfer medium circulation and at the same time the expansion tank is arranged so as to collect the insolation. CONSTITUTION:The heat transfer medium 1 in a heat collector 1 heated by the solar heat is supplied by means of a heat transfer medium circulating pump 5 through an expansion tank 2 to a heat exchanger 3 so as to repeat the circulation to return to the heat collector 1 again after heating the water in a hot water storage tank 4. In addition, because the expansion tank 2 is arranged so as to directly expose to the sunlight and at the same time the outer surface of the tank 2 is coated with selective absorption paint 8, the tank 2 forms an effective solar heat collecting body, resulting in contriving to increase the collected heat energy. |
