Could someone link me up with some information, either text or web based, concerning evaporation rate of water, in a slightly reduced pressure environment. I need to design a settling tank for a vacuum system to separate a fine oxide powder from water. We produce the slurry at a rate of about 20ml/min. I would like calculate an area and depth for my tank such that the water never accumulates above some predetermined level. The system runs continuously. It may be possible to slightly heat the container.