To speed the transition to zero carbon emissions, the U.S. must focus on designing or redeveloping entire communities that are zero energy, according to Charles Kutscher, a long-time energy efficiency researcher.
Tackling building energy use at the district level provides economies of scale in heating and cooling. Used on some U.S. college and other campuses, systems with a central plant that burns natural gas to heat water, which then is circulated to the various buildings, are more efficient than dedicated systems for each building.
To achieve zero carbon emissions, the latest strategy for district systems uses an ambient temperature loop that “simultaneously and efficiently both heats and cools different buildings,” Kutscher writes. “Heat pumps at individual buildings or other points along the ambient loop add or extract heat from the loop. They can also move heat between deep geothermal wells and the circulating water.”
National research labs and other project partners are developing an open source software development kit called URBANopt that models elements of zero energy districts. These can include building efficiency/demand flexibility strategies, rooftop photovoltaic arrays, and ambient loop district thermal systems. The software can be integrated into other computer models to aid in design of zero energy communities.
Related Stories
| Jul 12, 2012
New York’s One Bryant Park Bank of America tower is first new high-rise to achieve LEED Platinum
The new One Bryant Park Bank of America tower in midtown Manhattan is the first new commercial high-rise to achieve LEED Platinum certification.
| Jul 12, 2012
OSHA launches campaign to prevent heat illness
The Occupational Safety and Health Administration has launched its 2012 Heat Illness Prevention Campaign to educate employees and their employers about the hazards of working outdoors in heat, and how to prevent heat-related illnesses.
| Jul 12, 2012
Contractors have increasing concerns over new federal hiring quotas
A proposed rule by the U.S. Department of Labor's Office of Federal Contract Compliance Programs to increase disabled- and veteran-worker hiring quotas for federal contractors continues to raise deep concerns among contractors.
| Jul 5, 2012
Veterans Administration threatens to pull contract on new Orlando medical center
The Veterans Administration asked contractor Brasfield & Gorrie to get more workers on the job and figure out a way to get the job done faster, or the VA would pull the contract on the much-delayed Orlando VA Medical Center.
| Jul 5, 2012
Cost to contractors for new federal hiring quotas much higher than estimated, AGC says
Administration officials significantly underestimated the cost to construction employers of proposed new hiring quotas for federal contractors, according to analysis by the Associated General Contractors of America.
| Jul 5, 2012
Roof membrane could have prevented roof parking deck collapse, specialist says
The collapse of a section of a roof parking deck at the Algo Centre Mall in Elliot Lake in Ontario, Canada could have been prevented if the structure had a membrane, according to a concrete expert and specialist in structure analysis at McMaster University.
| Jul 5, 2012
New Joplin, Mo. hospital being built to withstand tornado that destroyed predecessor
After the May 22, 2011, EF-5 tornado destroyed St. John’s Regional Medical Center in Joplin, Mo., architects and engineers analyzed how the nine-story structure reacted to the storm.
| Jul 5, 2012
Continued tax breaks necessary for widespread adoption of net zero buildings
Tax breaks passed by the U.S. government to encourage construction of green buildings are set to expire in 2012 and 2013.
