biomass gasification for combined heat and power production · biomass gasification for combined...
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Biomass gasification for combined heat and power production
Jim AnderssonEnergy Engineering
Division of Energy ScienceLuleå University of Technology
HighBio seminar 2011 Kokkola, Finland
Highbio
Main objectives
Modeling of CHP plant in Aspen Plus, for establishing heat and mass balance
Evaluate the production cost of electricity (COE) and cost of heat (COH) for CHP plant up to 10 MWel
Sensitivity analysis of different factor affecting the production costs, e.g. investigate during which conditions it is profitable.
Gas turbine performanceGas turbine Siemens
TB5000-
Case 1
SiemensTornado
-Case 2
Nuovo Pignone PGT10
-Case 3
MWel
(Natural gas) 3.9 6.7 11.3
MWel
(Syngas) 2.7 4.7 8.3
Heat and mass balance
29 MWth
3.3 MWel
11.2 MWth
Electrical efficiency 11%Thermal efficiency 38%Electrical/Thermal output 0.29Total efficiency 49%
3.7 MWel
2.3 MWth0.8 MWel
Economic evaluation• A municipality has a heat
demand of x-MW and a investment in a heat producing facility necessary
• The additional investment will account for the COE
• COE – Cost of electricityCOH – Cost of heat
Economic results
Case 1 Case 2 Case 3
Total investment(Meuro) 12.0 16.4 22.8
COE (Euro/MWh) 241 173 147
COH(Euro/MWh)
50 50 50
Based on 6000 operating hours per year
Case III – Fixed COH
Case III
Conclusions
Net plant output is 0.9 to 3.3 MWel
COE in the range 147-241 €/MWh, resulting COH 50 €/MWhOperating hours, capital cost and biomass price
affect the COE most, along with plant efficiency Possible to increase the total efficiency, e.g.
reduce the production cost