An interesting read on New York City’s progress to cut citywide emissions from the NRDC Blog.
Source: NYC Walks the Walk on Greening its Buildings | Donna DeCostanzo’s Blog | Switchboard, from NRDC
Sure, selecting an energy efficient fan is great but won’t do you much good if it is oversized. Also if the ductwork design is improper or system pressure is too high an energy efficient fan will not save energy.
A recent article in HPAC provides 14 tips on “design and specification for reducing wasted energy in air systems and for substantially reducing total cost of ownership.”
Three tips that are mentioned that are commonly skipped or not enough attention is paid, is 1) right size the fan, 2) Use duct static-pressure set-point reset on VAV systems 3) VFD specifications
Consulting Specifying Engineer
interviewed 6 high profile engineers who are experienced in engineering K-12 schools.
The two main topics of discussion were:
1) Energy efficiency and sustainability are often the No. 1 request from building owners during new building design. What is your experience in this area?
2) Many aspects of structure sustainability (power, HVAC, maintenance, etc.) require building personnel to follow certain practices in order to be effective. What, if anything, can you as an engineer do to help increase chances of success in this area?
Posted in Efficient Design, Energy Efficiency
- Tagged building code standard, consulting engineer, consulting-specifying engineer, energy efficiency, grade school design, Green building, high school design, high-performance building, K-12 school, school building, sustainable building
What makes the latest project from Florida Power & Light and Silver Spring Networks so unique? It is the “single largest public lighting network to be deployed in North America, and notably, the first to ride on the same network used for smart metering”, according to Sterling Hughes, Silver Spring’s senior director of advanced technology.
So what are the benefits of having a lighting system on a smart metering network?
- Better and more efficient diagnostics
- Preventative Maintenance
- Planned operational improvements
- Adding lighting control to an existing smart meter network shouldn’t be too much of an added cost
- A SilverLink Sensor Network is designed with networking nodes programmed as “virtual sensors” to parse and prioritize certain data for different operations
It is important to note that having “digitally controllable LEDs” is essential for keeping costs low on installing a wireless connection.
Posted in Efficient Design, Energy Efficiency, Energy Management
- Tagged ami, cree, echelon, florida power & light, LED, network, network node, osram, philips, sensor network, sensus, silver spring networks, smart city, smart grid, smart meter
High Performance Buildings recently published an article on the new Bill & Melinda Gates Foundation Campus. The campus was designed to reflect three key priorities: human environment, the local ecosystem, and a climate neutral future. Additionally, the new campus serves as a central hub for employees that were previously located in five different offices. Total cost of ownership was used to determine the major HVAC and water system design specifications. An energy model of the design specifications versus ASHRAE 90.1-2004 baseline predicted a cost savings of 34% and energy savings of 40%. The article provides a detailed lessons learned section as well as IEQ, site and water, transportation and materials. One issue that continually is a challenge in construction is waste management. This project successfully diverted 96% of the construction waste preventing 15,900 tons of debris from entering the landfill. In the end, the campus won awards for their design from ASHRAE, IES, and LEED platinum certification.
Posted in Efficient Design
- Tagged ASHRAE, ASHRAE 90.1, Bill Gates Foundation, climate neutral, commissioning, construction waste management, Design, ecosystem, energy model, HVAC, IEQ, IES, LEED, Total cost of ownership
Deep “energetische sanierung” In Berlin
A recent Deep Energy Retrofit project in Berlin installed 120 mm (4 3/4 inch) thick blocks of expanded polystyrene (EPS) in the original masonry walls. According to the author EPS is the predominant rigid insulation found in Germany. The article goes on to discuss the importance of proper anchors to minimize thermal bridging and taping of seams. And of course…don’t forget to pay attention to the flashing around the windows.
“The work comes from a team at the Lawrence Berkeley National Laboratory in California that’s dedicated to studying how to keep cities cooler. Although team members knew both white and green roofs are better than traditional roofing, they wanted to get some hard numbers comparing the two. White roofs came out ahead in both improving global temperatures and cost, but both are good choices, the team wrote in a paper published in the journal Energy and Buildings.”
Most importantly don’t forget to ensure that your roof is adequately airsealed, insulated and flashing is installed properly to reduce conductive, convective heat gain/loss as well as prevent moisture infiltration. If the building lacks insulation (especially if it has a vented roof cavity) and has unsealed top plates, pipe penetrations, fan roof curb penetrations, etc this should be upgraded first before working on the roof membrane. You may find you have an oversized heating or cooling system after buttoning up the building’s envelope.
Read more: Cooler Ciites
“It’s a rare opportunity to back up the rainwater absorption and evaporative cooling benefits of green roofs with data from a real world application, said David Sailor, director of Portland State University’s Green Building Research Laboratory. PSU received a $133,000 grant from Walmart to spend the next two years tracking and comparing data collected by a rooftop weather station and sensors placed throughout the North Portland store’s roof.”
Read more: http://djcoregon.com/news/2013/12/16/eco-roof-experiment-on-aisle-five/#ixzz2niRrwLj0
5 reasons for investing in smart buildings
“Five key trends are making smart buildings a ‘no-brainer’ for commercial property owners and investors, according to Jones Lang LaSalle’s latest report, The Changing Face of Smart Buildings: The Op-Ex Advantage.”–Saleha Riaz