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
BIM and Information Technology | Sep 7, 2016
Energy Star Portfolio Manager tool updated to factor in waste management
The costs and benefits of managing 29 types of waste are now included.
Wood | Sep 6, 2016
Atlanta suburb prohibits wood-framed construction for high rises
The new building code prevents any structure with more than three stories from being built from a CLT frame.
Codes and Standards | Sep 1, 2016
Overuse of air conditioning hurts office productivity
A study found temperatures in the low 70s reduce worker performance.
Regulations | Aug 31, 2016
FEMA wants to toughen flood regulation on projects using federal funds
The proposal ‘would essentially rewrite the current 100-year flood standard.’
Sustainability | Aug 30, 2016
New federal project plans must include climate impacts
Agencies must quantify the specific impacts when possible.
Green | Aug 29, 2016
Vancouver, B.C., to require zero emissions on new buildings by 2030
No net GHG emissions will be allowed.
Codes and Standards | Aug 25, 2016
Freddie Mac extends efforts to fund multifamily energy/water efficiency projects
The Multifamily Green Advantage targets existing buildings.
Codes | Aug 24, 2016
Weak building codes no match for recent natural disasters, say industry experts
The recent floods and wildfires in Alberta are being cited as proof.
Legislation | Aug 24, 2016
World Trade Center contractor found guilty of minority-owned business fraud
The company used two minority firms as fronts in a nearly $1 billion scheme.
Codes and Standards | Aug 22, 2016
Federal construction contractors propose reforms to federal project delivery
Industry leaders offer how procurement system could be improved.