Dew-point shown as a 3D surface related to air temperature and relative humidity. These values are for standard barometric pressure at sea level which is 1.01235 bar. Copyright 2013 by Atmoswater Research. All rights reserved. - Click on chart to enlarge -
Today's 3D dew-point graphic is related to yesterday's post showing how water vapour density (the water resource for atmospheric water generators or AWGs) varies with unlimited combinations of temperature and relative humidity.
Dew-point increases with increasing temperature and relative humidity. As mentioned in the water vapour density post, places on Earth where AWGs are likely to be operated have water vapour densities of 4 to 21 grams per cubic metre of moist air. This density range corresponds to dew-points of about -3°C to 24°C. Desiccant dehumidifiers can process air with negative dew-points so on the chart above, a sliver of the green zone, all of the purple and blue zones, and half the orange zone are relevant to all water-from-air technologies. Many AWGs use mechanical dehumidification for atmospheric water vapour processing. These machines are restricted to processing moist air having an above freezing dew-point. The only zones which apply to mechanical dehumidification are the purple, blue, and the first half of the orange surface.
The data for the chart is from the Dew-point Temperature Table (SI).
Dew-point increases with increasing temperature and relative humidity. As mentioned in the water vapour density post, places on Earth where AWGs are likely to be operated have water vapour densities of 4 to 21 grams per cubic metre of moist air. This density range corresponds to dew-points of about -3°C to 24°C. Desiccant dehumidifiers can process air with negative dew-points so on the chart above, a sliver of the green zone, all of the purple and blue zones, and half the orange zone are relevant to all water-from-air technologies. Many AWGs use mechanical dehumidification for atmospheric water vapour processing. These machines are restricted to processing moist air having an above freezing dew-point. The only zones which apply to mechanical dehumidification are the purple, blue, and the first half of the orange surface.
The data for the chart is from the Dew-point Temperature Table (SI).
