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A Psychrometric Approach to Air-Side-Economizer Limits, Part 1 of 2

Part 1 of this two-part article reviews the basics of air-side-economizer operation and illustrates psychrometric analysis of a small office zone.

By FRED W. DOUGHERTY, PE, BAE, MME, Panacea, Fla. | Aug 01, 2011

Constant-volume air-conditioning systems control space air temperature directly and humidity indirectly by modulating or cycling the cooling apparatus. This article examines the effect of economizer operation on the comfort of spaces served by constant-volume air-conditioning systems.

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