Procédé de climatisation de serres à l'aide d'une eau non douce et de distillation de cette eau et installation en faisant application

1. Process for air-conditioning a greenhouse by day and night by non-fresh water and of distilling this non-fresh water to provide fresh water, said greenhouse serving for the cultivation of plants (6) for which only certain wavelengths of solar radiation are useful, characterized in that, by day optical filter means (10, 10') for filtering wavelengths not useful to the plants, are interposed between the radiation and the plants, and the non-fresh water is caused to circulate on the said optical filter means in a uniform film whereby to recover heat energy absorbed by the said optical filter means and the thus-heated water is stored ; and by night, at least a part of the heated stored water is circulated in the interior of the greenhouse, said water partially vaporising in the interior of the greenhouse and heating it, the vaporised water condensing on a wall (2) of the greenhouse and at least a portion of the condensed water being collected in a fresh water reservoir (42).