Re: How can you cool air using the 'Venturi' principle?

Hi Ron: This is a "cool" question.

If you look-up in the MAD SCI archives you will find a number of related questions and explanations. The site is http://www.madsci.org/MS_search.html.

Anytime a compressed fluid, air in this case, is allowed to expand through a small orifice, the speed increases while the pressure drops and to maintain the balance of energy in the molecules, heat is absorbed, and cools. This principle is used in closed cycle refrigeration such as air conditioners, etc. Instead of air, a gas that can be liquified under pressure becomes more efficient as the cooling fluid like FREON. Another web site you may want to look-up is: www.powerup.com.au/~philmak/GP2MAN/GndEffec.htm

There are several illustrations that might interest you. By the way, never use 600 psi air to cool your skin. The air can penetrate your skin with ill effects. Have fun with science but use care.