Quote:
Originally Posted by Brent Swain
When the outside air is 95% humidity ,changing one batch of wet air for another doesn't dry anything out. The bilge will be near 100% humidity, period, any time there is any water in it.. What causes condensation is a more than 2 degree difference in temperature between the air and a surface. Carpet reduces this difference by keeping the warm cabin air from contacting the hull plate, thus keep the air in the bilge cooler..
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I'm not following your point about changing wet air for another. What suggested as much? I was suggesting that carpet would insulate the bilge and not allow for the air to warm and be less than fully saturated.
Your 2 degree example is not quite right, but I think I know what you meant. If air is 100% saturated (ie 100% humidity) than any reduction in temperature is going to cause water to condensate out. Surfaces themselves don't matter. A cold surface causes the boundary air around it to drop in temperature and the moisture condensates out of it.
So that said, I didn't really follow the reply. When you can warm air, it will hold more moisture and/or be less saturated with the same amount and be further from the dew point and less likely to condensate.