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In page Solar desalination:

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Large solar desalination plants typically use indirect methods.[citation needed] Indirect solar desalination processes are categorized into single-phase processes (membrane based) and phase change processes (non-membrane based).[3] Single-phase indirect solar desalination use photovoltaics or heat engines like Sterling or Rankine cycles[4] to produce electricity that drive pumps.[5] Phase-change (or multi-phase) solar desalination is not membrane-based.[6]