The proposed update builds on the foundation of LEED 2009, including the alignment and weighting of credits and further advances the “bookshelf” framework where credits are applied to specific building types.
Citing a looming freshwater crisis that could affect the nation’s economy, the livability of our communities, and the health of our ecosystems, a diverse coalition recently issued a landmark call to action aimed at heading off a national crisis in water quality and supply.
Recent scientific evidence that chronic, low level exposures to petrochemicals commonly found in institutional cleaning products are a significant health hazard for children has fueled increased demand for safer products.
Engineering practices such as building information modeling (BIM), geothermal, and combined cooling, heating, and power were highlighted in the winning entries in the 2010 ASHRAE Student Design Competition.
Guests at Treehotel, which offers rooms incorporated into their natural surroundings, may need more than the most accurate satellite system to find their rooms in the sky.
NIBS has encouraged DOE to use a holistic approach to achieve sustainability in federal buildings; look at lifecycle costs instead of first costs as a basis for sustainable decision making; and include operations and maintenance staff and building occupants in the long-term strategies for sustainability.
This Web Exclusive article is contributed by Electro Static Technology, maker of AEGIS shaft grounding products. Increasing Sustainability Of Motors In Manhattan’s Time & Life Building A preventive maintenance plan that reduced the total life cycle cost of operations in a prominent building at the heart of New York City serves as an example of how the push for more sustainable building management has led to a growing awareness of a chronic, widespread problem with HVAC motors — electrical bearing damage. The problem is all too common in AC motors controlled by variable frequency drives (VFDs), which are also known as inverters, adjustable speed drives, etc. These drives are widely used because they can save energy, especially in applications with varying loads. Because many centrifugal fans and pumps run continuously, their motors will use less power if the input is modulated by VFDs. For example, a 20% reduction in fan speed can reduce energy consumption by nearly 50%. With rising energy costs, the use of throttling mechanisms to restrict the work of a motor running at full speed would be wasteful. However, efficiency alone is not enough if equipment keeps breaking down. That is what had been happening for two decades at the 48-story Time & Life Building, one of 19 buildings in the Manhattan business and entertainment complex built and partially owned by the Rockefeller Group and known as Rockefeller Center. The building’s HVAC system can be powered by either natural gas or electricity, enabling management to switch back and forth to take advantage of whichever source costs less at the time. More than 100 VFDs control the speeds of the 240 motors that run the building’s HVAC fans and pumps. Unfortunately, a large portion of the savings from these systems had been wiped out by maintenance costs because, in addition to their intended function, VFDs induce powerful, unwanted currents which cause electrical bearing discharges and, ultimately, premature motor failure. The Role Of Shaft Grounding Proper tuning of a drive’s frequency output range and proper grounding of a VFD-controlled motor’s frame are paramount. Only in recent years has it become clear that without an effective shaft grounding device as well, stray currents can wreak havoc with bearings, causing premature motor failure. Ironically, some products designed to protect bearings, such as conventional metal grounding brushes, require extensive maintenance themselves. Others, such as insulation, can shift damage to connected equipment. One of the newest and most promising bearing damage mitigation devices uses patented advanced electron transport technology to safely bleed off… …Read More…
The Groundskeeper and the IFMA Foundation are pleased to announce the release of Sustainable Landscaping, a practical, real world guide on how to introduce and advance sustainable practices in landscaping.
The survey, podcast, and seminar series are part of the IFMA Healthcare Council’s mission to keep health care professionals abreast of the most critical trends in 21st Century hospitals.
The Forest Stewardship Council (FSC) recently announced revisions to its Forest Management Standard for the contiguous U.S.