2011 International Conference on Alternative Energy in Developing Countries and Emerging Economies
- 151 -
Fig. 9. Environmental impact category in briquette
production process.
Fig. 10. Environmental impact category in electricity
production process.
D. Economic Analysis
Life Cycle Costing
This study assumed the lifetime of the project of 10
years. Based on the economic indices in 2011, a discount
rate was 6.7% [9], cost escalation was 3%, the electricity
and fuel escalation rates were 3.13% and 5.0%
respectively, while the maintenance costs escalation rate
was 5.0%.
The data present in Fig. 11 showed that the operation
cost accounted for 65.47% of the total cost and the rest of
the expenses included rice husk, glycerine, technician and
labor. The percentage cost of the energy consumption
was 32.61%, and the maintenance cost was 1.92%.
Fig 11. Breakdown of LCC for biomass gasification
power plant.
TABLE VIII
LCC
BIOMASS GASIFICATION POWER PLANT
Cost
Present Value
(
US$
)
C
c
39,902
PC
O
480,901
PC
M
14,073
PC
E
241,919
PS
1,812
Total Cost
774,982
N
OTE
: 1 US$ = 30.50 THB
(
WWW
.
BANGKOKBANK
.
COM
)
23 March 2011
Thus the total cost of biomass gasification power plant
without externalities was 0.11 US$/kWh (3.37
Baht/kWh).
In this study, the benefit of the project all year round
was considered under the following condition:
1. Electricity production 700,800 kWh/year
2. On-peak and off-peak saling price were 0.12
US$/kWh (3.62 Baht/kWh) and 0.04 US$/kWh
(1.19 Baht/kWh)
(Source:
power/pw-
Rate
–
PEA.html#1)
3. Adder price of electricity from biomass
0.002
US$/kWh (0.5 Baht
/
kWh) [10]
Net Present Value: NPV
The results of NPV, BCR, and IRR for all 3 cases of
the increasing of interest, Ft, and CDM
5
%,
10
%, and
15
% were shown in Fig 12.
Fig. 12. The NPV of 3 causes.
The result showed that if the value of NPV >
0
meaning that the project is feasible and has worth for
investment.
Benefit-Cost Ratio (BCR) and Internal Rate of Return
(IRR)
The result of BCR and IRR under the sensitivity of Ft
and CDM increasing
3
cases;
5
%,
10
% and
15
%, were
shown in Table 9.
