Desalination plants; water desalination plants; sea water desalination apparatus and sea water desalination plants; water purification, desalination and conditioning installations; refrigerators; cooling evaporators; cooling installations for water; industrial cooling installations; water cooling facilities for cooling electrolysis machines and facilities for generating gases and hydrogen; water purification installations, water desalinating apparatus and water conditioning installations, for use in the following fields: generation of water for hydrogen production.