| 摘要 |
PURPOSE:To prevent the lowering of the efficiency of a solar cell due to overheating by a method wherein high temperature water is bypassed to a heat emitter side upon over-collection of heat in the system effecting the power generation by the solar cell and the collection of solar heat in parallel. CONSTITUTION:A part of solar energy entered into a collector 1 used for both light and heat is connected to a load by the solar cell through a battery 12. On the other hand, water from a heat accumulating tank 2 is sent to the collector 1 by a circulating pump 4 and absorbs heat thereat. When warm water is not used in such a system, the temperature of the warm water in the collector 1 is risen too much and becomes to reduce the efficiency of the solar cell. In order to prevent this disadvantage, when the signal of a water temperature detecting end 22 exceeds a set value in a temperature controller 18, a heat emitting fan 8 is started by the control thereof through closing a solenoid valve 10 and opening a solenoid valve 11 to reduce the temperature of the warm water through the heat emitter 7. |
