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Abstract
This paper presents the results of an evaluation done on the cooling efficiency that could be reached with the use of six passive cooling techniques performed on roof tanks in hot dry weather. The procedure consisted in monitoring at field, during summer 2012, experimental units with the passive cooling techniques: Indirect Evaporative Cooling (IEC), Solar Protection (SP), Night Radiative Cooling (NRC), Thermal Insulation (TI), and Thermal Mass (TM). The experimental unit was compared to a control unit built with the same characteristics, dimensions, and position. With the results obtained at field, there was a calculation of the average cooling potential in each of the applied passive techniques, in order to determine the cooling efficiency (CE). The passive technique with the highest cooling potential average was IEC+TI+NRC with 822.89 Wh/m2day; and those that followed it were IEC+SP with 764.19 Wh/m2day, and IEC+TI+NRC+TM with 532.78 Wh/m2day.
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