In the last 10 years, evaporative and desiccant cooling technology for air conditioning has increased as an alternative for air conditioning systems has increased as an alternative to the conventional vapour compression systems. A typical system combines a dehumidification system that uses a rotary desiccant wheel, with direct or indirect evaporative systems, allowing a filtered and cooled air supplying temperature, humidity and speed conditions that propitiate environmental thermal comfort, even in equatorial and tropical climates. These systems causes a lot of electrical power saving, mainly in place where thermal source energy source are easily found, where the price of electrical energy is high,where the latent heat percentage is high or where the needed air dew point is low. So, evaporative cooling systems that use absorption pre-dehumidification presents a great perspective in thermal comfort. It can be used in co-generation systems, where the needed heat to regeneration can be gotten from gas turbines exhaust gases or internal combustion engines or, still, from steam in plants that use steam turbine.
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