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The following case studies describe how businesses have employed various technologies to reduce energy costs. See energy efficiency in waste less at agencies & schools for additional ways to conserve energy.
Optimizing energy use on and off campus Columbia University staff and students are taking everyday steps to optimize energy use on and off campus. These steps include monitoring systems for waste, installing automatic lighting, using computerized heating and cooling systems, replacing single pane windows, and using Energy Star appliances. Read more about their energy projects. Replacing metal halide lamps The Jacob K. Javits Convention Center, a partner in the NYC Wastele$$ Business Project, hosts major conventions and trade shows that attract millions of visitors to New York City every year. To create a more efficient and comfortable facility, the Javits Center embarked on a lighting upgrade that cut the Javits Center’s annual energy costs by $100,000, or about half of its annual energy bill. As part of its upgrade, the Javits Center replaced its metal halide lamps with high-intensity discharge (HID) lamps and fixtures containing adjustable dual reflectors. The HIDs and adjustable dual reflectors create even, consistent light, which is ideal for high-bay lighting applications like those found in the Center’s exhibit halls. Only about half as many fixtures were needed to replace the old metal halide lamps. The upgrade also cut wattage in half and produced less heat, which resulted in lower air-conditioning costs. The project had an overall payback period of less than two years. Source: Less Is More as Javits Center Cuts its Lighting Costs, Energy User News, November 9, 2000. Improving HVAC systems and investing in motion sensors When the Ford Foundation’s building opened in 1967, the average power usage for the building was 9 million kilowatts per month. During the energy crisis in the early 70s, management replaced the building’s heating, ventilation, and air-conditioning (HVAC) systems with more efficient motors, added centralized venting, and rewired parts of the building. The upgrade reduced energy consumption to approximately 3 million kilowatts per month. Since office equipment today is more energy dependent than in 1973, the building’s energy consumption has risen to 5 million kilowatts per month. To reduce energy usage, the Foundation plans to install motion sensors in all offices. Lights will go off after a 20-minute period of inactivity. The Foundation expects to incur substantial energy savings as a result of this program, since most office lights stay on until 11:00 p.m. Source: Conversation with Ford Foundation facilities management, Summer 2003 Staten Island University Hospital, a partner in the NYC WasteLe$$ Business Project, replaced more than 50 existing fan and pump motors, ranging in size from five to 60 horsepower, with high-efficiency motors. Based on a 71.1 percent duty cycle, or 529 hours of operation in a 744-hour month, the motor upgrade produced demand savings of 52.315 kilowatts and energy savings of 27,678 kilowatt hours. These savings reduced operating costs by $3,179 per month. Source: NYC WasteLe$$ Business Newsletter — Manufacturing Issue 1: Energy Conservation ALSO SEE energy efficiency and motors in tips for your business to find additional information on how to improve motor efficiency.
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Energy Efficiency Case Studies
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