POWER February 2015 - 33

COMBINED HEAT AND POWER
Optimizing Combined Heat and
Power in China
Courtesy: SSS Clutch
As it struggles to grow its economy while improving air quality in urban areas,
China is updating its energy delivery infrastructure. A key part of that plan is switching
from coal-fired to gas-fired combined heat and power plants. To push efficiency
even further, some plants are turning to synchronous clutches.
Joe Zwers
T
he developed world has done a lot to
reduce its fossil fuel usage for both
economic and environmental reasons.
As the rest of the globe races to move up
to first-world status, the question is how to
achieve economic development without the
pollution that accompanied Europe's and
North America's industrialization. An unprecedented
opportunity lies in taking the
technologies and best practices learned over
the past two centuries and applying them to
growing markets so that citizens of emerging
economies can enjoy the benefits of greater
wealth without simultaneously endangering
their health.
One way to achieve this is by combining
combined cycle gas turbine (CCGT) generaFebruary
2015 | POWER
tion plants with district heating (DH) systems,
achieving a higher level of efficiency,
lower fuel costs, and fewer emissions than
simple cycle or CCGT. This approach is
catching on around the world, but China is
especially keen to use it.
Emissions Challenges
Developed countries have historically had
much higher per capita emissions of traditional
power generation pollutants than
others, but this is changing. U.S. per capita
emissions have been falling since the mid70s
and are the lowest they have been since
the 1960s. Europe's per capita emissions
started dropping a decade later, notably with
Britain's " dash to gas " and the collapse of
www.powermag.com
the Soviet Union, which led to the decommissioning
of a large number of inefficient
coal-fired plants. Given the rapid growth of
fossil fuel usage in China, that country has
now caught up to the European Union (EU)
in per capita emissions of traditional power
generation pollutants, and given the trends
of the last five years, will catch the U.S. in
about 15 years.
China is not about to cut its economic
growth. While it has the world's second-largest
economy, just behind the U.S., its GDP
per capita is one-fifth that of the U.S. To keep
growing, without excessive spending for fuel
and unnecessarily increasing its emissions,
the country needs to get more value out of
the energy it is using.
33

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POWER February 2015

Table of Contents for the Digital Edition of POWER February 2015

Contents
POWER February 2015 - Cover1
POWER February 2015 - Cover2
POWER February 2015 - Contents
POWER February 2015 - 2
POWER February 2015 - 3
POWER February 2015 - 4
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