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HOBO U-Series temperature and motor on/off data loggers from Onset will be used for an air-conditioning system monitoring pilot program in San Joaquin Valley, California.
The nine-week study is funded by the California Energy Commission to look at energy savings realized through the use of an Enhanced Fan Delay – a retrofit device HVAC contractors can apply to residential air-conditioners to improve cooling performance in hot-dry climates.
"After a system’s compressor shuts down in hot-dry environments such as the Western U.S., water that has condensed on the evaporator coil can be re-evaporated into the conditioned space to boost the sensible efficiency of the unit,” said Adrian Hairrell, an engineer with Proctor Engineering Group (PEG), the San Rafael, CA-based engineering consulting firm developing the devices. "The purpose of this study is to compare the energy use of a standard system to that of the same system with the Enhanced Fan Delay control added. Our goal for the project is to realize at least 7% energy use savings in each California climate zone we monitor."
The monitoring period will run for about nine weeks beginning in May 2010. All participating homes are within the San Joaquin Valley region, where summertime temperatures can reach as high as 115°F, leading to heavy residential air-conditioning use. The results of the study are expected to be published in a report in early 2011.
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