The present invention provides a solar water heating apparatus which includes concentric inner and outer vessels defining an annular cavity therebetween, within which cavity a phase change material is located, and which is vaporised when solar radiation is incident on the outer vessel, in order to transfer heat to a water store contained in the inner vessel, this water store being fed fresh unheated water while the heated water is extracted therefrom for domestic or other purposes.
|Publication status||Published - 7 Nov 2008|
Bibliographical noteCountry: Europe
Commercialisation Status: market
Patent Application Date: 2009-11-06