| 摘要 |
<p>The installation has a circuit carrying the heat collecting liq. through the solar trap and a heat exchanger and a second circuit carrying the water to be used. This circuit has a flexible reservoir which can change volume and a supplementary heater at the reservoir outlet. The two circuits are fitted with valves, temp. and pressure probes so that (a) the exchanger is only fed with heating fluid if the temp. of the liq. leaving the solar trap is higher than that in the exchanger, (b) the reservoir is only fed with water from the exchanger if the reservoir water temp. is simultaneously lower that that of the water in the exchanger and lower that a predetermined upper temp. threshold, (c) freshwater is fed into the circuit if the temp. in the reservoir is above the lower temp. threshold and (d) fresh water inflow is stopped if the reservoir pressure obtains an upper threshold or if the temp. in the reservoir is lowr than that in the exchanger. The arrangement prevents any possible "backward" heat flow in which heat put into the circuit by a subsidiary heat source may be lost through the solar panel. The deformable reservoir allows the regulation of the quantity of water heated and prevents any oxidn. of the water as it is not in contact with the air.</p> |
