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Distributed
Power Generation System |
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Both families and enterprises need a lot of
heat energy in addition to electric energy. Distributed
power generation system can substantially improve comprehensive
utilization efficiency of energy and is the best solution
for chambers, residential estates, hotels and hospitals
in big cities and combined heat and power supply in remote
residences as well as enterprises with big demand for
heat. In Aug. 2000, the State Planning Commission, the
State Economic and Trade Commission, the Ministry of Construction
and the State Environmental Protection Administration
of China jointly issued Regulations on Combined Heat and
Power Generation, where they emphasized that the State
would vigorously support the total energy system of combined
heat, power and cold generation consisting of minitype
gas engine sets. With implementation of West-to-East Gas
Transfer project, it creates excellent conditions to promote
combined heat, power and cold generation system operating
on natural gas. |
The core equipment of distributed power generation
system is the thermoelectric converter. Minitype gas turbine,
Stirling engine operating on fuel gas and internal-combustion
engine operating on fuel gas are the dominant types of
thermoelectric converters for the combine heat and power
generation system operating on natural gas. For 1-100kW
combined heat and power generation system, Stirling engine
is a very ideal and feasible thermoelectric converter.
In addition, Stirling engines are more environmentally
friendly than other heat engines in respect of noise,
vibration, emission, etc., and suitable for applications
in densely-populated downtown areas. So it can satisfy
the demands of commercial customers with high requirements
on environmental quality. |
It is forecast that the area of commercialized
houses will increase by 80 million m2 during the Tenth
Five-Year Plan period in Shanghai, where residences account
for 85%. If distributed power generation system is adopted
for 2% of the new residences and 15% of the new commercial
houses, the application area of the system will be up
to 3.16 million m2, with electric output over 94.8MW,
heat supply up to 190MW and annual natural gas consumption
of 153 million M3. In addition, the use of natural gas
will reduce amount of electricity generated from traditional
coal-fire power plants. It is estimated to reduce the
greenhouse gas CO2 by 0.585 million tons annually, and
Nox emission by 2100 tons. In addition, popularization
of distributed power generation system in Shanghai will
drive industrial development approximating RMB 800-900
million. With popularization of natural gas in the eastern
coastal regions, the industry will enjoy a more promising
perspective. At present, the Research and Demonstration
on Key Technologies of Energy Island for Stirling Engines
Using Natural Gas has been incorporated into the Difficult
and Key Technological Projects of Shanghai Municipal Science
& Technology Commission. |
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