Results and Discussion

Power Efficiency Guide

Ultimate Guide to Power Efficiency

Get Instant Access

The solar and biomass energies in refineries are utilized as the approximately GHG-free alternatives. The optimization through replacing the solar and biomass is done. The amount of CO2 and SO2 reduction through the discussed scenarios is presented in Table 29.4. The results reveal that the SGDBS scenario and SGB scenario achieved the maximum and minimum emission reduction in comparison to the other cases.

Figure 29.6 shows the capital cost comparison of the discussed scenarios. It is shown that the SGB scenario has achieved minimum capital cost and SGDBS scenario has accomplished maximum capital cost.

Table 29.4 Emission reduction.

CO2 reduction (ton/year)

SO2 reduction (ton/year)

SGB

2573.15

4.29

SGDBS

3648.30

10.58

SGSBS

3330.07

8.74

Fig. 29.6 Capital cost comparison of the discussed scenarios.

SGB SGDBS SGSBS

Fig. 29.6 Capital cost comparison of the discussed scenarios.

Table 29.5 presents the operating cost, energy saving, and payback period of each scenarios. The operating cost of biomass replacement consisted of electricity cost, auxiliary material cost (petrol, chemicals), maintenance cost, water and wastewater disposal cost, and disposal of residual inert material cost. The solar replacement operating cost is included of electricity cost and maintenance cost.

Table 29.5 Total operating cost, energy saving, and payback period of each scenario.

Scenario

Total operating cost ($/year)

Energy saving (%)

Payback period (year)

Base Case

99,532,524

-

-

SGB

89,857,084

10.25

6.35

SGDBS

89,658,233

10.25

7.81

SGSBS

89,792,267

10.25

8.49

It is noted from the result that the SGDBS scenario has achieved the minimum total operating cost of $89,658,233/year and the payback period of 7 years and 10 months. However the SGB scenario, which used biomass for replacing, has accomplished the minimum payback period of 6 years and 4 months. As shown in Table 29.5, the total operating cost achieved through SGB is higher than the SGDBS and SGSBS scenarios. It is because of simultaneous replacement of solar and biomass energies in the steam network system. It is shown that the optimum case is the SGB scenario which achieves minimum capital and operating cost. Furthermore, among all suggested scenarios, the SGDBS case achieved maximum emission reduction. It is noted that there is a trade-off between the payback period and emission reduction.

Was this article helpful?

0 0
Guide to Alternative Fuels

Guide to Alternative Fuels

Your Alternative Fuel Solution for Saving Money, Reducing Oil Dependency, and Helping the Planet. Ethanol is an alternative to gasoline. The use of ethanol has been demonstrated to reduce greenhouse emissions slightly as compared to gasoline. Through this ebook, you are going to learn what you will need to know why choosing an alternative fuel may benefit you and your future.

Get My Free Ebook


Post a comment