Variable refrigerant flow (VRF) air conditioning is a popular method of heating and cooling in many countries. Though the product has been on the market for over 20 years, only recently was it introduced to the United States market. Because of its perceived energy efficiency (EE), there is growing...

The two Southern California Edison projects (Phase 1 and 2) developed and implemented Variable Refrigerant Flow (VRF) algorithms into the eQUEST Building Energy Simulation Program. While VRF systems are applicable to both residential and small to medium-sized commercial facilities, these projects...

Project Summary This project develops and implements variable refrigerant flow (VRF) algorithms into the eQUEST building energy simulation program. While VRF systems are applicable to both residential and small-to-medium-sized commercial facilities, this project is limited to residential heat...

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This study was conducted to determine the typical energy savings potential of a single compressor...

Project SummaryTwo-stage or indirect-direct evaporative cooling technology offers the best opportunity for replacing air conditioning in California. The existing two-stage evaporative cooler on the market does not achieve the full potential of this technology. Previous lab testing has shown an...

Project SummaryOccasionally, the utility electric grid systems undergo voltage fluctuations caused by faults. These faults are caused by storms, accidents, debris on lines, and equipment failures. Normally, protective relaying is used to disconnect the problem lines and then voltage automatically...

Project SummaryThe commercial sector uses variable air volume systems to provide more efficient heating, cooling, and ventilation than constant volume systems. To function properly and efficiently, these systems must maintain a balance of fan and VAV box control which supplies only the needed air...

Project Summary:The largest energy and demand savings opportunities in residential and light commercial sectors are in cooling (47% of all peak demand savings opportunities). The use of air conditioning continues to grow in California due to increases in income, and in inland regions such as CEC...

Project SummaryThe BreezeAir single-stage advanced evaporative cooler is an Australian product that has recently been introduced into the U.S. market. This product differs from U.S. advanced technology in that it uses 4-3.5 inch thick pads rather than 1-8 or 12 inch thick pad. The result is twice...