| 摘要 |
<p>The device is energized by solar radiation and operated by differential emissivity to transfer its accumulated heat energy. The device comprises an enclosed housing 10 transparent to solar radiation and a thermally conductive member 11 supported in the housing 10. One longitudinal section 15 of the housing 10 is arranged to be exposed to solar radiation, while another longitudinal section 16 is adapted to be exposed to a heat-absorbing medium. A solar selective material 21 of a relatively low emissivity but relatively high absorptivity coats the thermally conductive material 11 that lies within the longitudinal section 15 of the housing 10 that is arranged to be exposed to solar radiation. A material 22 of relatively high emissivity coats the thermally conductive member 11 that lies within the longitudinal section 16 of the housing that is adapted to be exposed to a heat-absorbing medium. Various alternative coating materials are referred to. <IMAGE></p> |
