| 摘要 |
Apparatus comprising a solar collector, three heat exchangers operating at different temperature levels and connected in series on the service-water side, a latent-heat store, various lines and valves, a circulating pump and an electrical operation-control circuit responsive to the temperatures sensed by various temperature sensors located in the above mentioned components. The two heat-exchangers operating at the higher temperature levels are each by-passed by a mixing valve on the service-water side. Depending on the solar radiation or the temperature of the circulating medium, the heat exchangers at the higher or lower temperature level or combinations thereof are successively connected to the circulating medium. |
