Dew Point Evaporative Comfort Cooling

Air-conditioning (AC) is the single largest contributor to peak demand on United States (U.S.) electricity grids and is the primary cause of grid failures and blackouts (Purdum, 2000. Power generators and refrigeration-based AC units are least efficient at high ambient temperatures, when cooling dem...

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Bibliographic Details
Main Authors: Dean, Jesse, Kozubal, Eric, Herman, Lesley, Clark, Scott, Heaton, Tim, Eastment, Mark, Hancock, Ed, Barker, Greg, Galvin, James
Format: Report
Language:English
Subjects:
Air Condition, Heating, Lighting & Ventilating
AIR CONDITIONING EQUIPMENT
COST ANALYSIS
DECISION MAKING
DEW POINT
EFFICIENCY
ENERGY CONSUMPTION
EVAPORATION
IEC(INDIRECT EVAPORATIVE COOLING)
LESSONS LEARNED
MOISTURE CONTENT
PERFORMANCE(ENGINEERING)
WBE(WET BULB EFFECTIVENESS)
WET BULB TEMPERATURE
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Summary:Air-conditioning (AC) is the single largest contributor to peak demand on United States (U.S.) electricity grids and is the primary cause of grid failures and blackouts (Purdum, 2000. Power generators and refrigeration-based AC units are least efficient at high ambient temperatures, when cooling demand is highest. AC accounts for approximately 15% of all source energy used for electricity production in the U.S. alone (nearly 4 quadrillion British thermal units [Btu]), which results in the release of about 343 million tons of carbon dioxide into the atmosphere every year (U.S. Department of Energy [DOE], 2011). Evaporative ACs can mitigate the environmental impacts and help meet Energy Independence and Security Act (EISA) 2007 and U.S. Department of Defense (DoD) energy policy goals by eliminating energy waste and reducing electricity demand. Researchers have developed a new multi-staged indirect evaporative cooling (IEC) technology known as the Coolerado Cooler. This technology uses a thermodynamic cycle referred to as the Maisotsenko Cycle (or M-Cycle). The product works by cooling both the primary (or product) air and the secondary (or working) air in a 20-stage process. Each stage contributes to cooling by combining multiple direct stages with a single indirect stage. The cumulative result is a lower supply air temperature than is possible with conventional evaporative cooling technologies, as the unit can achieve wet bulb effectiveness (WBE) of 90% 120%. The project objective was to demonstrate the capabilities of the high-performance multi-staged IEC technology and its ability to enhance energy efficiency and interior comfort in dry climates, while substantially reducing electric-peak demand. T