| 摘要 |
PURPOSE:To effectively utilize solar heat by a heating and cooling radiator including two heat sources, that is, a heat source that utilizes solar heat and an auxiliary heat source, in which radiator a solar heat side main heat exchanger having a larger heat exchange capacity is placed upstream of an air current. CONSTITUTION:The hot water produced in a solar heat collecting circuit 1 is pumped by a circulating pump 6 via three-way valves 7, 8 to the main heat exchanger 22 of the radiator 9. If the temperature of this hot water is low, hot water having a higher temperature than that is delivered by an auxiliary boiler and a circulating pump 15 to the auxiliary heat exchanger 21. Those two systems are operated by singly or in parallel depending upon the ambient conditions. Since the main heat exchanger 22 has a larger heat exchange capacity and is arranged upstream, the range of utilizing the solar heat is extended, and when the two systems are operated to perform heating, the total amount of heat exchange can be increased. |
