cooling your tent or van

[Drake12321]

Cool fixture.

[Canoe]

Someone wanted this, so I figured I'd make it available to all.

Maximum single-stage evaporative cooling output temperature drop potential using a Dura-Cool pad (which is 95% efficient).
(Note: Aspen media is only 85% efficient. Approximately 12% less temperature drop than shown on these graphs).

• Look up the ambient air temperature (dry bulb) on the left axis.
• Follow the closest line to where it meets the Relative Humidity across the bottom.
• Find that point back on the left axis, which is the coolest possible chilled air output (for single stage evaporative cooling with a Dura-Cool pad).
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• One can see how the low humidity days on the playa are prime for some evaporative cooling. Many days hit the low teens. Some days even go to single digit Relative Humidity. (I think the lowest I've seen is 7% RH.)
• The calculation of wet bulb from dry bulb temperature & relative humidity is done in SI units, so the data used for the graph is in Celsius. That data is converted to Fahrenheit for the imperial/F graph, so that graph doesn't have nice round values for the ambient temperature start of the lines. You'll have to estimate your distance between lines to get the most accurate value.

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Max Single-Stage Evaporative Cooling Temp with Dura-Cool Pads - Celsius.png

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Max Single-Stage Evaporative Cooling Temp with Dura-Cool Pads - F.png