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Amreica’s Enery Future: Technology and Transformation
FIGURE 2.2Estimates of potential natural gas savings in commercial and residentialbuildings in 2020 and 2030 (relative to 2007) compared to delivered energy from naturalgas. The commercial and residential sectors are shown separately. Current (2007) US.delivered energy from natural gas in the commercial and residential sectors, which isused primarily in buildings, is shown on the left, along with projections for 2020 and2030. To estimate savings, an accelerated deployment of technologies as described inPart 2of this report is assumed. Combining the projected growth with the potential savings results in lower natural gas consumption in buildings in 2020 and 2030 than existstoday. The industrial and transportation sectors are not shown. Delivered energy isdefined as the energy content of the electricity and primary fuels brought to the pointof use. All values have been rounded to two significant figures.
Sources: Data from Energy Information Administration (2008) andChapter 4inPart 2ofthis report.
Opportunities for achieving substantial energy savings exist in the industrial and transportation sectors as well. For example, deployment of energy efficiency technologies in industry could reduce energy use in manufacturing by 4.9–7.7 quads per year (14–22 percent) in 20206 relative to the EIA reference case projection (Figure 2.3). Most of these savings would occur in the pulp and paper, iron
6
These identified savings would provide industry with an internal rate of return on its efficiency investments of at least 10 percent or exceed the company’s cost of capital by a risk premium. See Chapter 4 for additional discussion.
