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
Concrete | Aug 2, 2016
Concrete Association builds case against cross-laminated timber
The campaign asserts that not enough is known about CLT in construction
Seismic Design | Jul 28, 2016
Risk of man-made earthquakes now factor in seismic hazard analysis
Significant risk increases seen in some areas of the U.S.
Resiliency | Jul 27, 2016
New York’s resilience plans not taking long-term view, critics charge
Continued waterfront development may be regretted later this century.
Green Specifications | Jul 26, 2016
New Miami Beach law requires LEED certification on projects larger than 7,000 sf
LEED Silver the prescribed standard on buildings larger than 50,000 sf.
Energy | Jul 25, 2016
Michigan law provides local governments with flexible energy conservation financing
Allows cities to fund projects without adding debt.
Contractors | Jul 15, 2016
Trade unions, contractors call for maximum penalty in construction worker death case
‘Sick and tired’ of lawbreaking contractors defining public perception.
Multifamily Housing | Jul 14, 2016
Portland, Ore., City Council approves construction excise tax for affordable housing
Expected to raise $8 million annually on commercial and residential projects.
Drones | Jul 13, 2016
FAA issues final rule on commercial use of drones
The rule covers commercial uses for drones that weigh less than 55 pounds, and it takes effect Aug. 29.
Codes and Standards | Jul 12, 2016
OSHA raises maximum civil penalties by 78%
Applies to infractions that occurred after Nov. 2, 2015.
School Construction | Jul 11, 2016
Fight over school funding in Arizona headed to court
Legislature accused of ignoring 1994 ruling ordering state to pick up some of the costs.