Page 67 - Biomass Gasification, Pyrolysis And Torrefaction Practical Design and Theory

46 Biomass Gasification, Pyrolysis and Torrefaction

Total unit of electricity produced 5 7446 h 3 1kW 5 7446 kW/year
Variable O&M 5 $0.0031/kW h 3 7446 kW h 5 $23.08/kW/year
Yearly fixed O&M 5 $31/kW/year
Total O&M 5 23.08 1 31 5 $54.08/kW/year
Total revenue requirement 5 $54.08 1 $223.69 5 $277.68/kW installed/year
For 40 MW plant RR 5 40,000 3 277.68 5 $107,200/year

SYMBOLS AND NOMENCLATURE
F fuel input to the gasification plant (tons/h)
specific capacity of a new gasifier plant ($/MWe)
K g
MW capacity of a new gasifier (MW)
specific capacity of an existing gasifier plant ($/MWe)
K g0
capacity of an existing gasifier (MW)
MW 0
c constant, depending on the gasifier equipment and capacity ( )
total cost of a new gasifier ($)
C g
total cost of an existing gasifier ($)
C g0
n capacity index ( )
C gA capital cost in a certain year ($)
C gB capital cost in a past year ($)
I A cost index for year A ( )
I B cost index for year B ( )
CC capital cost of a plant ($)
C fp cost of fuel preparation ($)
C tg cost of turbine generator system ($)
C e cost of auxiliary plant ($)
TPC total cost of the plant ($)
C con cost of construction of the gasification plant ($)
cost of project development ($)
C proj
office cost and contingency ($)
C cont
process contingency cost ($)
C cont, tech
project contingency cost ($)
C cont, proj
TPI total project investment for a new plant ($)
AFDC interest paid on the borrowed capital ($)
TCR total capital requirement ($)
funds required for start-up expense ($)
C start
working capital required ($)
C wc
funds required for the initial catalyst and other supplies ($)
C ca
TOE total operating expense in a biomass plant ($)
variable operating costs ($)
O&M variable
fixed operating costs ($)
O&M fixed
return on debt ($)
R D
return on equity ($)
R E
D B book depreciation ($)
T income tax ($)
RR the total revenue required from sales of all products from the plant ($)
C c carrying charge ($)