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 objective of this study was to evaluate the energy use associated with air conditioning hotel guest rooms under three different control strategies:Baseline: the digital thermostat was manually controlled by the guestOccupancy Controls: DDC thermostat with integrated occupancy sensor and energy...

Project SummaryThe IBM Mobile Measurement Technology report assesses a technology developed by IBM, the Mobile Measurement Technology (MMT) for data centers, aimed at producing energy savings on the cooling side. A roughly 30,000 square foot data center in Torrance, California, with under-floor air...

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 SummaryIn response to an overwhelming interest in innovations in LED lighting technology for the outdoor area lighting applications, San Diego Gas & Electric’s Emerging Technologies Program conducted this assessment with the following objectives:1) Identify potential LED solution for...

Project SummaryThe Office of the Future Collaborative (OTFC) strives to uncover a strategy for efficiency in commercial office buildings that incorporates integrated design strategies, proven technologies, innovative leasing arrangements, and an enhanced partnership between the interested parties...

 In response to the whole building approach to achieve energy efficiency, San Diego Gas & Electric’s Emerging Technologies Program’s (ETP) objective with this assessment was to: * assess the energy efficiency potential of an advanced lighting control system * determine the difficulty...

Project SummaryThe High Ceiling Lighting Options Technology Assessment project studied the applicability of compact fluorescent lamps (CFL) and light emitting diodes (LEDs) in a high ceiling general illumination application. At Hyatt, areas of the grand foyer were selected to replace the base case...

While electric water heaters are less commonplace in PG&E’s residential service territory than natural gas units, where they are used, they can represent a significant portion of a home’s electric demand (up to 5 kW). As a potentially large power user, electric water heaters are likely...

Data centers are among the most energy-intensive facilities. Air management is not only imperative for energy management but also for thermal management. The goal of air management is to supply as little supply air as possible at as high temperature as possible without adversely affecting the...