2012年(464)
分类: Delphi
2012-05-31 14:51:22
Low-tech cleantech solutions won’t revolutionize the
energy industry. They won’t make venture capitalists rich. And they won’t, by
themselves, lead to the 80 percent reduction in greenhouse-gas emissions by 2050
that many climate scientists suggest we need. But they can offset a lot of
carbon in the short run. In an industry where plants routinely last more than 50
years, small adjustments have lasting impacts.
Improved efficiency at coal
plants provides another example of low-tech cleantech. MyUniversity of
California, Davis colleague Jim Bushnell and I showed that the fuel efficiency
of the Southeastern coal plant we studied was 3 percent higher when particular
operators were at the controls. This is comparable to a car getting better gas
mileage when a “coaster” is at the wheel than when a lead foot is driving. With
a coal-fired power plant, the potential savings in fuel and forgone emissions of
having a “coaster” in charge are big.
Imagine the greenhouse-gas savings if
efficient operators controlled every U.S. coal plant. A 3 percent gain may sound
puny, but, when applied to the more than 600 coal plants in the U.S., it could
offset more carbon than the nuclear improvements I discussed above.
The
results would be even more dramatic in India and China, where almost 70 percent
and 80 percent, respectively, of electricity is generated from burning coal.
Back-of-the-envelope calculations suggest that improving the fuel efficiency of
Chinese coal plants by about 5 percent would offset more carbon emissions than
all of the non-hydro renewable energy in the world.
So why aren’t utilities
already seizing these opportunities? The problem is, at least partly, bad
incentives. In most of the world, electricity-sector managers don’t have to
fight for profits and share in a free market. In U.S. states that haven’t
deregulated, utilities can pass along their fuel costs to customers. In China,
too, many plants receive coal at heavily subsidized prices.
Removing bad
incentives and encouraging managers to improve the efficiency of existing power
plants may be the most immediate low cost, large-scale solution we have in the
battle against climate change.
Look at any
product category over a long time period and you will see that changes in market
position rarely occurred unless there was a substantial or transformational
innovation. Innovation drives customer “must haves.” These, in turn, define a
new subcategory in which competitors are either weak or nonexistent, resulting
in meaningful sales change.