A Psychrometric Approach to Air-Side-Economizer Limits

Dougherty, Fred W.
September 2011
Heating/Piping/Air Conditioning Engineering;Sep2011, Vol. 83 Issue 9, p58
The article describes the psychrometric analysis of a church sanctuary in Minneapolis. It discusses the excessive space humidity that occurs in high limits and allows economizer operation when outdoor dew point temperature exceeds occupied-space dew point temperature. It notes that psychrometric analysis allows designers to evaluate economizer operation with different high-limit controls and avoid occupant discomfort by selecting controls and capacity modulation.


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