3 ms·
Current seawater desalination technology runs at about 2x the osmotic pressure power consumption, the current membranes require quite some pressure to push even
by jojobas 4y ago
Current seawater desalination technology runs at about 2x the osmotic pressure power consumption, the current membranes require quite some pressure to push even pure water through.
- twawaaay 4y agoOf course. You want a high enough water flow to get the installation to filter lots of water. You have to have pressure above osmotic pressure. You can increase the flow of water through filter either by increasing pressure or by adding more filters.
- jojobas 4y agoNo, it's just that there is a friction-like loss for getting any amount of water through the membrane. See here. https://sci-hub.ru/10.1016/j.desal.2015.01.005 https://sci-hub.ru/10.1016/j.desal.2015.01.005
- twawaaay 4y ago"The trends from the analysis presented in this paper show that in both seawater and brackish desalination we are approaching thermodynamic limitations." That's excerpt from the article you linked.
- jojobas 4y agoNo, it's not quite like that. With pipes there's a linear (or quadratic for turbulent flow) resistance, low pressure still results in some flow. With membranes you have a threshold pressure below which you get no flow at all.