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Non-Tech : Alternative energy -- Ignore unavailable to you. Want to Upgrade?

To: Doren who wrote (8654)	7/27/2010 3:22:07 PM
From: Jacob Snyder	1 Recommendation Read Replies (1) \| Respond to of 16955

<heat is the main thing needed for desalination plants> Two main methods of desalination: 1. Distillation: This uses mainly changes in pressure, not changes in temperature, to separate salt from water. 2. Reverse Osmosis semi-permeable membranes: this uses pressure gradients across the membranes; no heat is needed. This process uses less energy. As the technology of the membranes evolves, this method is becoming superior to distillation. So, there is a niche for cogeneration, but not a big niche, and it will disappear once membrane technology dominates. en.wikipedia.org