Optimal thermal power plant selection for a tropical region using multi-criteria decision analysis

Njoku, Ifeanyi Henry; Oko, C.O.C.; Ofodu, J. C.; Diemuodeke, Ogheneruona E.

doi:10.1016/j.applthermaleng.2020.115706

Cited by 12 publications

(2 citation statements)

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“…To determine the relative performance indicators [59] of gas hydrate as a fuel blend, it is necessary to take the following parameters into account: economic (fuel cost) [60,61], energetic (minimum ignition temperature, ignition delay times, calorific value, degree of burnout) [62,63], and environmental (anthropogenic gaseous emissions) [64][65][66]. The ignition and combustion of methane-propane hydrate (the fraction of methane was 0.6, and the fraction of propane was 0.4) was studied experimentally and theoretically to establish the characteristics listed above.…”

Section: Combustion Of Gas Hydratesmentioning

confidence: 99%

Prospects of Using Gas Hydrates in Power Plants

et al. 2022

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By adding water to fuels, several objectives are pursued, with the main ones being to stabilize combustion, minimize the anthropogenic gaseous emissions, homogenize and stabilize the fuel, as well as improve its fire and explosion safety. Water can be injected into the furnace as droplets or vapor and introduced as part of fuel samples. Water often serves as a coupling or carrier medium for the delivery of the main fuel components. In this paper, we compare the combustion behaviors of high-potential slurry fuels and gas hydrates. We also analyze the contribution of in slurries and gas hydrates to the combustion process. The values of relative combustion efficiency indicators are determined for gas hydrates and slurry fuels. The conditions are identified in which these fuels can be burned effectively in power plants. The research findings can be used to rationalize the alternative ways of using water resources, i.e., gas hydrate powder and promising composite fuel droplets. The results can also help predict the conditions for the shortest possible ignition delay, as well as effective combustion of gas hydrates as the most environmentally friendly new-generation alternative fuel.

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Section: Combustion Of Gas Hydratesmentioning

confidence: 99%

Prospects of Using Gas Hydrates in Power Plants

et al. 2022

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“…Incentives on feed-in tariffs or tax credits could improve its overall cost competitiveness and make it more viable (Yang et al, 2021). In the grid system, the plant configuration has a significant impact, economically and environmentally (Destyanto et al, 2017;Xu et al, 2017;Njoku et al, 2020). Based on the references above, there is a significant gap in the studies that separately investigated efficiency, reliability, and optimum replacement analysis.…”

Section: Introductionmentioning

confidence: 99%

Holistic Operation and Maintenance Excellence (HOME): Integrating Financial and Engineering Analysis to Determine Optimum O and M Strategies for a Power Plant during its Lifetime

Wibawa¹,

Ichsani²,

Yuniarto³

2021

IJTech

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Today, there is an oversupply of 23.5 GW (47.7%) in the electricity system of Indonesia. PT.PLN, the state-owned electricity company, needs decision criteria to decide whether the power plant should be continue operated, rehabilitated or demolished. Base on the literature review, none of the frameworks in the world could be used to solve this problem. Therefore, this research proposed a new method or framework called HOME (Holistic Operation & Maintenance Excellence). The method has proposed and analysed in this research combines engineering analysis (efficiency and reliability) and economic analysis, which are total cost (acquisition cost, fuel cost, operation cost, and maintenance cost) and revenue. The objective is to define decision criteria to maximize the profit and minimize the cost has spent by a power plant. The final results are the decision criteria for a power plant, wheater to continue operated, rehabilitated, relocated, or demolished. A subcritical coal power plant, 400 MW, has been selected as a case study. Two scenarios of coals (LRC and HRC) and CF (79.46% and 60.96%) have been analyzed. Coal variation is used to evaluate its impact on efficiency and reliability, while CF change would represent the external and uncontrollable factor that impacts its revenue. The results showed that the thermal efficiency when using LRC (4,220 kcal/kg) reduced from 36.99% to 35.18% compared to HRC (4,917 kcal/kg), while the plant availability decreased from 97.93% to 97.45%. Nonetheless, the annualized profit when using LRC at the CF of 79.46% was 18.31 million USD/year, and it was a preferable option compared to 7.80 million USD/year when using HRC. Furthermore, the CF has predicted a reduction to 60.96%. In this situation, the power plant was better rehabilitated or relocated when it used HRC because it needs a minimum CF of 63.83% to get a break-even point (CFBEP). Conversely, the plant could continue to operate when LRC is used because CFBEP was 50.82%. Based on the analysis results, HOME is a good approach to determine and aid decision-making on the strategies required to operate and maintain a power plant comprehensively through its whole life cycle.

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