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
| Oct 31, 2012
Investigators look into crane severely damaged by Sandy in Manhattan
Investigators are examining a construction crane collapse atop a $1.5 billion luxury high-rise in midtown Manhattan due to high winds during Hurricane Sandy.
| Oct 31, 2012
Construction error suspected in Miami-Dade College garage collapse
A construction error is the chief suspect in the partial collapse of a parking garage at Miami-Dade College in Doral, FL.
| Oct 31, 2012
New European laws on timber will go into effect in March 2013
A new European Union timber regulation prohibits the “placing on the market of illegally harvested timber or timber products derived from such timber.”
| Oct 31, 2012
MIT models show roofs' capacity for solar energy in Cambridge, Mass.
A new mapping tool from the Massachusetts Institute of Technology and a Boston design firm can calculate rooftops' capacity for solar energy.
| Oct 31, 2012
Demand for living roofs, walls to reach $7.7 billion by 2017
The demand for green roofs and living walls is expected to climb from $5.3 billion in 2011 to $7.7 billion in 2017, according to a report from Lux Research.
| Oct 25, 2012
Philadelphia councilmen move to crack down on contractors working without licenses, permits
Two Philadelphia city councilmen are trying to crack down on the "underground economy" of developers and contractors who work without licenses and permits, pay cash under the table, and operate unsafe job sites.
| Oct 25, 2012
OSHA and NIOSH offer Spanish version of nail gun safety document
The Occupational Safety and Health Administration and the National Institute for Occupational Safety and Health have made available a Spanish version of “Nail Gun Safety - A Guide for Construction Contractors.”
| Oct 25, 2012
AGC holding webinar on sequestration’s potential impacts on the construction industry
AGC will hold a free webinar on sequestration and its potential impact on federal construction contractors on Nov. 7.
