TY - GEN
T1 - IEA Bioenergy - techno-economic assessments for bioenergy applications, Task 35
T2 - Puuenergian teknologiaohjelman vuosiseminaari
AU - Solantausta, Yrjö
PY - 2001
Y1 - 2001
N2 - Bagasse residues, produced from sugarcane processing, are
the largest industrial biomass residues worldwide.
Co-generation of heat and power is currently the only
commercial large-scale use of this biomass waste. The
Rankine power plant, which is the industrial technology,
has a low power-to-heat ratio. Increasing the ratio would
be desirable, as this would potentially lead to lower
cost of electricity, and a more efficient utilization of
the bagasse. As part of the IEA Bioenergy, alternatives
to the Rankine cycle has been studied. Alternative
bagasse energy concepts were studied by considering the
current sugar mill bagasse utilization and energy
requirements, and integrating bagasse pyrolysis and
gasification to improve the mill's energy efficiency. In
both cases combined heat and power cycles using gas
turbine or engine power plants were compared to the
conventional Rankine cycle. Both systems are under
development and offer some advantages. The gasification
system has a high efficiency, and the technical
uncertainties are well known. The power plant fuelled
with pyrolysis liquid is flexible and easier to operate
because of de-coupling power plant and solid fuel
handling. This concept has considerable technical
uncertainties. All power plants may be operated for
periods extending beyond the typical 180 days operation
of a sugar mill either by storing densified bagasse
(produced during mill operating time) or pyrolysis oil.
Both advanced systems have a higher efficiency and a
power-to-heat ratio than the Rankine cycle. Estimated
cost of electricity for cases under different operation
modes are presented and compared.
The study was carried out 2000 within the IEA Bioenergy
Task 22, Techno-Economic Assessments for Bioenergy
Applications. The aim of the work was to study the
competitiveness of new biomass to electricity concepts
being developed at a specific site. The case studied
deals with utilization of bagasse, which is a residue
from sugar mill operation. Global potential amount of
bagasse is large, and converting bagasse to electricity
could play an important role in reducing green house gas
emissions in countries with sugar cane cultivation.
AB - Bagasse residues, produced from sugarcane processing, are
the largest industrial biomass residues worldwide.
Co-generation of heat and power is currently the only
commercial large-scale use of this biomass waste. The
Rankine power plant, which is the industrial technology,
has a low power-to-heat ratio. Increasing the ratio would
be desirable, as this would potentially lead to lower
cost of electricity, and a more efficient utilization of
the bagasse. As part of the IEA Bioenergy, alternatives
to the Rankine cycle has been studied. Alternative
bagasse energy concepts were studied by considering the
current sugar mill bagasse utilization and energy
requirements, and integrating bagasse pyrolysis and
gasification to improve the mill's energy efficiency. In
both cases combined heat and power cycles using gas
turbine or engine power plants were compared to the
conventional Rankine cycle. Both systems are under
development and offer some advantages. The gasification
system has a high efficiency, and the technical
uncertainties are well known. The power plant fuelled
with pyrolysis liquid is flexible and easier to operate
because of de-coupling power plant and solid fuel
handling. This concept has considerable technical
uncertainties. All power plants may be operated for
periods extending beyond the typical 180 days operation
of a sugar mill either by storing densified bagasse
(produced during mill operating time) or pyrolysis oil.
Both advanced systems have a higher efficiency and a
power-to-heat ratio than the Rankine cycle. Estimated
cost of electricity for cases under different operation
modes are presented and compared.
The study was carried out 2000 within the IEA Bioenergy
Task 22, Techno-Economic Assessments for Bioenergy
Applications. The aim of the work was to study the
competitiveness of new biomass to electricity concepts
being developed at a specific site. The case studied
deals with utilization of bagasse, which is a residue
from sugar mill operation. Global potential amount of
bagasse is large, and converting bagasse to electricity
could play an important role in reducing green house gas
emissions in countries with sugar cane cultivation.
M3 - Conference article in proceedings
SN - 951-38-5722-0
T3 - VTT Symposium
SP - 433
EP - 459
BT - Puuenergian teknologiaohjelman vuosikirja 2001
PB - VTT Technical Research Centre of Finland
CY - Espoo
Y2 - 5 September 2001 through 6 September 2001
ER -