Energy and exergy analyses of biomass cogeneration systems
Date
2012-08-01
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Abstract
Biomass cogeneration systems can generate power and process heat simultaneously from
a single energy resource efficiently. In this thesis, three biomass cogeneration systems are
examined. Parametric analysis of back pressure steam turbine cogeneration system,
condensing steam turbine cogeneration system and double back pressure steam turbine
cogeneration system is conducted. Energy and exergy analyses are performed for three
biomass based cogeneration configurations. The parametric analysis demonstrates the
effects of varying operating conditions (temperature: 340 oCto 520 oCand pressure: 21bar
to 81bar). A higher steam inlet temperature and pressure to the turbine yields better
energy and exergy efficiencies and performance. Steam inlet conditions to the turbines
and process heater requirements influence the power output and cogeneration system
efficiencies. Greenhouse gases reduction is achieved by cooperating cogeneration
systems with biomass to reduce CO2 emissions and global warming potential in the
power industrial sectors.
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Keywords
Biomass, Efficiency, Combine cycles, Energy and exergy