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U.S. Department of Energy Energy Efficiency and Renewable Energy

New and Underutilized Technology: Multi-stage Indirect Evaporative Cooling

The following information outlines key deployment considerations for multi-stage evaporative cooling within the Federal sector. This information spans:

Benefits

Multi-stage indirect evaporative cooling is an advanced evaporative cooler that can lower air temperatures without adding moisture. These systems evaporate water in a secondary (or working) airstream, which is discharged in multiple stages. No water or humidity is added to the primary (or product) airstream in the process.

Application

Multi-stage indirect evaporative cooling is applicable in office, research and development, service, and school applications.

Climate and Regional Considerations

Multi-stage indirect evaporative cooling is most effective in a dry climate, such as the western U.S.

Key Factors for Deployment

Multi-stage indirect evaporative cooling is well suited in applications where a high percentage of outside air is used or required.

Hybrid versions of multi-stage indirect evaporative coolers that also include a DX coil have been developed to meet a wider range of cooling requirements.

Ranking Criteria

Federal energy savings, cost-effectiveness, and probability of success are ranked 0-5 with 0 representing the lowest ranking and 5 representing the highest ranking. The weighted score is ranked 0-100 with 0 representing the lowest ranking and 100 representing the highest ranking.

Federal Energy Savings Cost Effectiveness Probability of Success Weighted Score
0.6 5.0 3.0 48

Resources

The following resources are available: