Analysis of Evaporative Pre-Cooling for Commercial Air-Conditioning Equipment

Category: 
Commercial
Project Number: 
ET14SDG1051
Start Year: 
2014
End Year: 
2016
Markets Segments: 
Commercial
Commercial Office
Commercial, Small
Educational Facilities
Food Service Industry
Government - Institutional Facilities
Hospitality
Retail
Project Type: 
Demand Savings
Demonstration
Electric Energy Savings
Product Evaluation
Type of Technology: 
Evaporative Cooling
HVAC, Commercial
Organization: 
San Diego Gas and Electric (SDG&E - a Sempra utility)
Project Status: 
Completed
Savings Type: 
Work

Project Summary

This report describes the results from field demonstration of evaporative pre-cooling technology on commercial HVAC (heating, ventilation, and air conditioning) equipment for SDG&E (San Diego Gas & Electric) at a field site in California climate zone 10. This study seeks to evaluate the energy efficiency, water use, performance, and effect on peak demand of this technology in real world operation. Of particular interest is the application of this technology to large air-cooled, rooftop units (RTUs). The results of this study provide the technical basis on which a utility may consider deploying the technology in similar hot, dry climates. The study showed that evaporative pre-cooling technology offers energy savings—particularly during peak hours—with limited water consumption.

PDF Report: 
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