Evaporative Cooling Pads: Test Procedure and Evaluation

Abstract

A procedure for testing evaporative cooling pads was developed to relate efficiency, face air velocity, and static pressure drop across the pads. This article outlines the test procedure; describes how pad performance is affected by pad angle, pad thickness, and initial aging; analyzes the accuracy of the test method; and compares test results with those of previous researchers. Many experimental cross-corrugated cellulose pads of varying design were tested, including three designs currently on the market (10 cm (4 in.) 45-45, 15 cm (6 in.) 45-45, and 15 cm (6 in.) 308-30)*.