Chilled beam systems provide savings by replacing fan energy with pump energy. They use pumped chilled water instead of blowing cold air. Water has much higher heat capacity, both by mass and volume. In typical pump and fan arrangements, this has been shown to translate into a reduction in fan energy by a factor of seven.
This article, reprinted from an EXHAUSTO white paper, discusses the benefits of demand-controlled ventilation (DCV) systems in multi-story, multi-residential buildings, which include improving building energy efficiency, enhancing comfort and other key performance factors. It reviews the application of DCV in new, retrofit and renovated building projects.
If a sheave is not balanced, it will have an inherent uneven distribution of weight. This uneven weight distribution magnifies vibration and noise when rotated and as speed of rotation increases. Unbalanced sheaves can also lead to premature life of other drive components due to the vibration and stresses placed on the components.
Facility managers are hunting for ways to operate more efficiently and conserve energy. We know more now than we did even a few years ago about where to look for unnecessary waste. We also know how to quantify the dollar value of that opportunity. That allows you to create a more accurate proposal that’s more likely to be approved and achieved.
John Guardiola, vice president of engineering at Portfolio Property Management Global (PPMG), knew exactly who to call to help him update the building systems at the downtown Detroit landmark, One Detroit Center: Joe Colleran and his team at mechanical service contractor W.J. O’Neil Company.
If capital expenditures at your customers’ facilities for new equipment have been frozen or eliminated, one way to save money and free up financial resources is to tune up existing HVAC equipment. The checklist provided here should generally apply to most main equipment types and energy waste areas.
Last April, the U.S. Department of Energy (DOE) announced a substantial investment of $114.3 million in funding for the rapid deployment of approximately 1,000 fuel cell systems in key early markets including combined heat and power (CHP). A team from the National Renewable Energy Laboratory (NREL) is now assessing these systems.
One of the greatest challenges HVACR wholesalers face daily is convincing service technicians to try new products or tools, but two Johnstone Supply countermen in Portland, Ore., have discovered a solution - use it themselves to help skeptics become believers.
One tactic that helps cut fuel and other transportation costs and is growing in popularity is called route optimization. It’s being employed by the mega-fleets of major retailers down to small HVAC businesses. It’s gaining in momentum because of its ability to not only cut costs but also improve customer service.
These conditions were noted in an energy audit report: “The fire/smoke damper was closed.” “The coils are still dirty.” These are not unusual examples. Since 40 percent of the energy used in the United States is used to operate buildings, it is obvious that a big step in making America green is to make our buildings green.