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Energy Savings in Direct Evaporative Cooling: real application in the Madrid metro and simulated application for offices in Sydney
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Water evaporates spontaneously in contact with the air, absorbing around 680 W/(kg/h of evaporated water) from the air (1,053 BTU/lb.). Direct Evaporative Cooling (DEC) exploits this simple physical phenomenon to achieve high cooling capacities with low energy consumption, by evaporation of water (this is normally atomized into very fine droplets to ensure maximum evaporation). This article describes the energy savings of a direct evaporative cooling system implemented at a Madrid metro station. Following this is an analysis of the annual energy savings achievable from a hypothetical DEC system in an AHU for offices in Sydney.
Simonetti, R. (2010). Energy Savings in Direct Evaporative Cooling: real application in the Madrid metro and simulated application for offices in Sydney. Energy Systems Laboratory (http://esl.tamu.edu); Texas A&M University (http://www.tamu.edu). Available electronically from