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WET STRAW Use a thermometer to find the temperature of moving air -- either outside when the wind is blowing or in front of an electric fan. Hang some wet straw, newspaper, or cloth strips in the breeze. Leave a little space between the strips so the air can pass between them. Use a thermometer to find out what happens to the temperature of the air after it passes through the wet material. An analogy can be made to air conditioners and how they work. I wonder if the brilliant scientist knows about "swamp coolers?" I think that is what this section describes. Water-coolers drip water down onto pads made of shredded wood stuff. A fan blows air through the wet pads and into the building. Water-coolers take the edge off high heat; they also increase the humidity in the building. The air conditioner works by ducting air across the colder, heat-absorbing side of a refrigeration apparatus, and directing the cooled air back into the air-conditioned space. Small window conditioners vent heat outdoors. Larger systems use circulating water, or pipes with freon in them, to remove heat.  Any problems with this page? Send URL to
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