Western Cooling Challenge Certifies Trane’s Voyager DC

Western Cooling Challenge Certifies Trane’s Voyager DC


In an effort to advance commercial air conditioning equipment that operates more efficiently in hot dry climates such as California, Trane developed a hybrid rooftop air conditioner that utilizes indirect evaporative cooling to increase cooling capacity and reduce peak electrical demand by 40%.
The equipment was laboratory tested by the UC Davis Western Cooling Efficiency Center, and has been certified to pass the rigorous Western Cooling Challenge performance requirements. Trane is now the second manufacturer to achieve UC Davis’ Challenge certification, an effort sponsored by Southern California Edison, California Energy Commission and Pacific Gas & Electric.
“Many are not yet aware that new electric utility rates will saddle commercial building owners with large additional charges for power used during peak periods. Since air conditioning is the largest portion of electricity used at these times, the potential for 40% savings is enormous,” said Jonathan Woolley of the UC Davis Western Cooling Efficiency Center. “Trane’s Voyager DC met our performance goals on the mark, and promises to be one of the most cost effective ‘climate-appropriate’ cooling technologies available for commercial buildings”.
The California Public Utility Commission’s Statewide Energy Efficiency Strategic Plan demands the rapid commercialization of cooling technologies that are adapted for hot-dry climates. The plan specifies that 70% of air conditioners installed in 2020 should be “climate appropriate”.
Trane’s Voyager DC uses water evaporation to cool the condenser on an otherwise conventional air conditioner. It then uses the water chilled by evaporation to cool the hot outside air used for fresh air building ventilation. These techniques increase the number of hours a system can use “free-cooling” to cool a space with outside air, and dramatically reduce the amount of time a system operates at full speed. In addition to capturing large savings at peak operating conditions, the Trane Voyager DC incorporates variable speed fans, staged compressors, and other measures to maintain high efficiency operation at part load conditions.
Launched in June 2008, the UC Davis Western Cooling Challenge is a program designed to help HVAC manufacturers deliver ‘climate appropriate’ cooling technologies. The program evaluates equipment performance through laboratory and field tests, and assists utilities, engineers, and customers in applying the technologies.

About the Western Cooling Efficiency Center

The Western Cooling Efficiency Center is a key component of the UC Davis Energy Efficiency Center (EEC), which was founded in 2006 with support from the California Clean Energy Fund (CalCEF). The Center is supported by industry affiliates, including utilities, manufacturers, contractors and the California Energy Commission. Its mission is to partner with stakeholders to identify technologies, disseminate information and implement programs that reduce cooling-system electrical demand and energy consumption in the Western United States. wcec.ucdavis.edu

About Trane

Trane is a major global HVAC manufacturer, with a diverse portfolio of products and services related to HVAC, energy conservation, and renewable energy. A subsidiary of Ingersoll Rand, Trane has been manufacturing HVAC equipment for more than 100 years. With technologies and expertise in the field of energy, Trane also manages various energy efficiency programs for utilities, and supports financing solutions to advance the application of energy and cost saving measures. Trane.com

About UC Davis

For more than a century, UC Davis has engaged in teaching, research and public service that matter to California and transform the world. Located close to the state capital, UC Davis has 31,000 students, an annual research budget that exceeds $500 million, a comprehensive health system and 13 specialized research centers. The university offers interdisciplinary graduate study and more than 100 undergraduate majors in four colleges — Agricultural and Environmental Sciences, Biological Sciences, Engineering, and Letters and Science — and advanced degrees from six professional schools — Education, Law, Management, Medicine, Veterinary Medicine and the Betty Irene Moore School of Nursing. UC Davis

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