In October 2008, a number of federal government departments and research organizations collaborated to produce the Federal R&D Agenda for Net Zero Energy High Performance Green Buildings (PDF). It’s a fascinating document, its origins driven primarily in response to two energy policy laws passed in 2005 and 2007 (during the Bush administration). In particular, the Energy Independence and Security Act of 2007 (EISA 2007) created an Office of Commercial High Performance Green Buildings and a consortium on a Zero Net Energy Commercial Buildings Initiative. This consortium produced the R&D agenda.
The EISA 2007 act also includes a $250 million program that the DOE and other agencies are administering with the goal of “all new commercial buildings to be so efficient in energy consumption and in on-site renewable energy generation that they offset any energy use from the grid,” part of the Energy Independence & Security Act (EISA) of 2007 passed by Congress and signed by President Bush last year.
Noting that buildings represent about 40% of U.S. energy use, and 40% of our greenhouse gas emissions, the report says:
Buildings present one of the best opportunities to economically reduce energy consumption and limit greenhouse gases.
And we already have in hand technology and techniques to get a good start on this:
From an energy perspective along, high performance building technologies can already reduce building net energy consumption on average by 30-50%. New technologies to achieve net-zero energy – buildings that over a period of time produce as much energy as they consume – must be developed and integrated holistically into building design to make buildings more self-sufficient.
For the remaining 50% of the job, the report defines six areas of research and development that are needed:
- Improving our ability to measure the performance of buildings, and design integration
Credible performance measures, combined with tools, performance data, and design guidelines, will create market demand for emerging building energy technologies, economies of scale, and reduced capital costs.Designing for effective daylighting, ventilation, and passive solar energy management, for example, could yield energy savings approaching 40%, without advances in individual technology efficiencies.
- Developing building technologies and strategies to achieve net-zero energy
Energy-efficient and direct-use renewable energy technologies – in the forms of cost-effective materials, components, subsystems, and construction techniques – still have enormous potential for energy savings at costs lower than acquiring supplies from traditional or renewable power sources. At the same time, renewable power and other supply technologies also have enormous advancement potential.
- Improving water use and water retention
- Improving the energy footprint of building materials and building activities
- Improve occupant health, safety, and productivity
- Enable these new technologies to be put into use in practice
Adequate information and communication flows are critical to achieving energy and resource goals. Substantial technology transfer efforts will be required to penetrate all facets of the building and construction sectors.To enable a future where truly integrated design is the rule, rather than the exception, the process by which buildings are planned, designed, constructed, operated, and demolished requires a radical cultural change.
I recommend taking a look at this report – it’s quite interesting reading. As a government-sponsored work, it is naturally somewhat conservative, but even so it holds out a lot of hope – and suggests numerous avenues to pursue – for significantly reducing the energy demand of our commercial and residential buildings in the U.S.