| 摘要 |
A passive system for heating water by a concentrated beam of diffused solar radiation. A convergent conical incipient beam of diffused sunlight with a cross-sectional area of 15,700 cm2 is reduced in size to a concentrated circular whole beam with a cross-sectional area of 2.25 cm2. The reduction in beam size is achieved by three conical lenses which concentrate the beam by refraction and by an annular conical mirror which reflects the beam inward to the vertical axis and concentrates the beam by convergence. The concentrated beam is projected into a hot-water tank onto a metal heating element which absorbs the heat of the beam and transfers the heat to the water.
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