lviii Revenue from Combine Cycle electricity sales:
= 350,400 MWh x USD 110 MWh = USD 38,544,000 year
4. PLTU Calculations: Generated electricity from PLTU combination:
= 140 MW x 8,760 hours = 1,226,400 MWhyear Generated electricity from PLTU without combination:
= 400 MW x 8,760 hours = 3,504,000 MWhyear Fossil fuel cost for PLTU combination:
= 140 MWh x USD 75.551,93MWh = USD 10.577.270,2 year Fossil fuel cost for PLTU without combination:
= 400 MWh x USD 75.551,93MWh = USD 30.220.773,60 year Revenue from electricity sales from PLTU combination:
= USD 1,226,400x 110 = USD134,904,000 Revenue from electricity sales from PLTU without combination:
= USD 3,504,000 x110 = USD 385,440,000 Net income from PLTU combination:
= 211.992.000 +38.544.000 +134.904.000- 10.577.270,2 = USD 374.862.729,8 year
Net income from PLTU without combination: = 385.440.000- 30.220.773,60
= USD 355.219.226,4 year
5. Expected saving:
Revenue from electricity sales from PLTU combination per year totals USD 374.862.729,8 year, while revenue from electricity sales from PLTU without
combination reaches USD 355.219.226,4 year, and therefore, there is a difference in
sales of USD.19.643.503,4. This net income of USD.19.643.503,4 could be invested in
the construction of PLTP Batu Kuwung and the Combine Cycle System for the period minimum of 22 years.
lix
7. Utilizing all wastes as potential products
The wastes from the industrial production process in PT.KIEC industrial estate consist of garbage, liquid wastes, and wastewater as well as CO
2
emission. For CO
2
emission, PT Krakatau Steel produces the highest amount of CO
2
from its steel smelting process, which could be processed into liquefied CO
2
. The strategy to utilize waste has already been carried out by PT.RMI by processing CO
2
waste from steel smelting into liquefied CO
2
that could be consumed by other industries. The level of CO
2
emission reduction from energy efficiency and recycling of waste is presented in Table 3 as follows:
Table 3. CO
2
Emission Reduction
Source of Energy Before
After Total reduction
CO
2
tonyear
MWh CO
2
tonyear MWh
CO
2
tonyear
Fossil Energy 400
2,733,120 140
956,592 1,776,528
- -
Geothermal -
- 220
- Combine Cycle
- -
40
-
PT.KS 350,400
350,400 PT.RMI
- -26,280
+26,280
Total 400
3,083,520 400
1,280,712 1,802,808
Source: PT.KIEC 2013
Table 3 above shows that activities involving energy efficiency and recycling of CO
2
in PT.KIEC industrial estate could reduce CO
2
emission by 58.5 from 1,802,808 tons per annum to 1,280,712 tons per annum. Therefore, the development of a model from this
research implemented in PT.KIEC industrial estate is workable and could reduce more than 6.5 of total CO
2
emission emitted from PT.KIEC industrial estate, as required by the National Action Plan to reduce greenhouse gasses.
The Raw Model on Figure 5.17 on symbiosis of industries in energy efficiency and recycling of CO
2
was developed from the earlier condition in PT.KIEC industrial estate in Cilegon, as presented in Figure 5.16. In addition to giving economic benefits, it also benefits
environmental preservation, as follows: c.
Reducing CO
2
emission, as one of greenhouse gasses that could potentially create global warming, by 58.5 from 3,083,520 tons per annum to 1,280,712 tons per
annum.
