| 摘要 |
The invention concerns appliances, one of which uses solar energy as sole source of power. It comprises an accumulation solar water heater (222) and quasi-reversible liquid/vapour heat exchanging alveolar elements, provided with hydrophilic coatings. Elements of types E and C, respectively assigned to water evaporation (224a, b, c) and to vapour condensation (226a-b) are interposed, with narrow free spaces, in a heat-insulated treatment chamber (223), arranged above the boiler (222). Hot water coming from the heater (222) flows in closed circuit, by thermosiphon, from the top downwards of elements E and from the bottom upwards of elements C. A slightly cooling member (242) is interposed between the bottom collectors (240-244) of elements E and C. Hot water spills over slowly from the top of the hydrophilic coatings of elements E and the vapour produced is condensed opposite, on the walls of elements C. Sea water to be distilled is introduced through a pipe (254) upstream of the bottom collector (244) of elements C. Two valves (264-257) regulate the circulation of hot water and the supply of sea water. A high performance coefficient is obtained in good economic conditions. The invention is useful for continuous production of fresh water and/or brine; for distillation of all liquids with standard boilers; for economical production of concentrates; and for cogeneration of electricity and fresh water. |
