Stuck in someone else's frames? break free!
|| 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.
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