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From: mgqlu@ntuix.ntu.ac.sg (Max Lu)
Subject: Re: Auto air conditioning without Freon
Message-ID: <1993Apr23.090023.6620@ntuix.ntu.ac.sg>
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It is actually simple in principle. Porous adsorbents like zeolite and
activated carbon can adsorb gases evaporated from the adsorbate (water
or methanol, etc.) giving the cooling effect.  Upon being heated, the 
gas-saturated adsorbent bed will give off the gases which are then to be
condensed.  This forms the adsorption refrigeration cycle.  The only problem
is that the COP is very low (0.2 -0.6).  

Max

-- 
Max G Q Lu, PhD 				|  Internet: mgqlu@ntu.ac.sg
Division of Thermal Enginerring			|  Bitnet: mgqlu@ntuvax.bitnet
School of MPE, Nanyang Technological University |  Phone: (65) 7994818
Nanyang Avenue, Singapore 2263			|  Fax:   (65) 7911859
