Project Info

Project Title 
Evaporative Cooler Field Monitoring
Project Number 
PGE 0709
Investor Owned Utilities 
Project Year(s) 
2007 - 2008

Project Summary

California's electrical system peak demand is growing rapidly in the residential sector, mainly because of increased air conditioner use due to increased population growth in the central valley. This project compared and evaluated three evaporative cooler technologies that could reduce air conditioning use: conventional, advanced single-stage and advanced two-stage evaporative coolers. Results showed that two-stage advanced evaporative coolers (AEC) deliver air that is 3–4 degrees cooler than a single-stage AEC. Further, this air has less humidity than that of either conventional (“swamp”) or single-stage coolers. Both single- and two-stage AECs use rigid cellulose media, two speed fans, and water management systems to deliver 100% outside air to meet occupant comfort expectations.

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