| 摘要 |
<p>A system for heating water by solar energy, operating in a closed circuit and using the change of phase of a heat-exchanging fluid as method of heat exchange. This system, which comprises at least one collector (2) exposed to the sun in order to transmit the radiant energy of the sun to a heat- exchanging fluid and thus to transform the fluid into a liquid/vapour mixture, a heat exchanger (7), a pump (14) for returning the heat- exchanging fluid, after passing into the heat exchanger, to the collector, and ducts (3, 6, 9) for connecting the various elements above, is characterised in that it also comprises a phase separator (4) connected to the output of the collector, a duct (5) for returning the liquid recovered in the phase separator to the base of the collector so that the latter is constantly wetted, and two ducts (6, 9) connecting the separator to the exchanger, one (6) to make the vapour circulate towards the exchanger where it will condense and the other (9) to make possible the return of the condensed liquid towards the separator, by means of the pump, the latter being situated below the average level of liquid in the exchanger in order to ensure the return of the condensed liquid accumulated at the base of the exchanger towards the separator. <IMAGE></p> |
