| 摘要 |
<p>The central heating system has e.g. an oil fired boiler which includes a heat recovery arrangement with a blower in the flue gas outlet line discharging the gases through an exhaust hose bent into a U shape, with a heat exchanger coil around it. Another branch also includes a blower for discharge or collection from outside. The coil forms part of a heat pump with an evaporator and a compressor and a water circulation system which can consist of a set of pipes in the form of a zig-zag coil housed under the roof tiles. This enables the heat of the sun on the tiles to be used to obtain extra efficiency for the system.</p> |
