| 摘要 |
<p>A plant for the production of thermal energy by using the solar heat comprising in combination a solar header fed with a refrigerating fluid, a condenser arranged within a user element, a series of ducts connecting the header to the condenser to form a natural circulation circuit, a second circuit inserted into the first on which allows to attain the heat pump cycle and means for selectively and automatically switching over the plant from the one to the other circuit in dependence on both the outer temperature and temperature of the heated means, said heat pump circuit comprising a compressor, inserted between the header and condenser and a capillar choke valve arranged with a return duct extending from the condenser to a header.</p> |
