| 摘要 |
The heating system has a heating circuit in exchange contact with a consumer unit and supplied by a heat pump. The heat-transfer medium is first directed into heat exchange contact with the pump and then with a heater transferring heat from a source and finally with the pump heat-exchanger. After the heater, the medium temp. is higher than that before the exchanger. There can be a primary heat-exchanger with fired boiler, whose combustion gases supply the heater. |
