Probabilistic Exergoeconomic Analysis of Transcorp Power Plant Ughelli

Ogbe, Otujevwe Paul; Anosike, Nnamdi; Okonkwo, Ugochukwu C.

doi:10.20944/preprints201609.0054.v1

Cited by 3 publications

(6 citation statements)

References 26 publications

(44 reference statements)

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“…This has led to the uncertainty in energy prices and increasing stringent emission regulations. Therefore, researchers and industries are encouraged to discover more efficient energy systems with reduced thermal energy losses [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Exergoeconomic Analysis of 21.6 MW Gas Turbine Power Plant in Riau, Indonesia

Martin

Rivai

Amir

et al. 2021

ARFMTS

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In this study, exergoeconomic analysis was carry out on a 21.6MW gas turbine power plant by using logbooks record Pekanbaru Unit. The exergy analysis was start to determine the exergy destruction of each component of the power plant based on the first and second laws of thermodynamics and in this study, exergy and economic analysis were combined and used to evaluate the accrued cost caused by irreversibility, including the cost of investment in each component. The exergy analysis results showed that the location of the largest destruction was in the combustion chamber with 21,851.18 kW, followed by the compressor and gas turbine with 8,495.48 kW and 3,094.34 kW, respectively. The economic analysis resulted that the total cost loss due to exergy destruction was 2,793.14$/hour, consisting of compressor 1,066.43$/hour, combustion chamber 1,561.46$/hour and gas turbine 165.25$/hour. The thermal and exergetic efficiency of gas turbine power plant were 24.51% and 22.73% respectively.

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Section: Introductionmentioning

confidence: 99%

Exergoeconomic Analysis of 21.6 MW Gas Turbine Power Plant in Riau, Indonesia

Martin

Rivai

Amir

et al. 2021

ARFMTS

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“…Table 4 shows the comparison between the base data and the optimum results of the decision variables. [2], [24], [25]. As gas turbine get older, its compressor airfoils tend to be rougher because of long exposure to the environment.…”

Section: Resultsmentioning

confidence: 99%

Optimal Operating Parameters of 100MW Delta IV Ughelli Gas Turbine Power Plant Unit

Otunuya¹,

Emeka²

2017

IJEPE

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Abstract:The possibility of improving the overall efficiency of 100MW Delta IV Ughelli gas turbine power plant unit is presented. The study used Non-Dominated Sorting Genetic Algorithm (NSGA) to minimize the exergy destruction by optimally adjusting the operating parameters (decision variables). The adjusted operating variables were compressor pressure ratio r p , compressor isentropic efficiency ƞ ic , turbine isentropic efficiency ƞ it , turbine inlet temperature T 3 , inlet flow rate of air a and mass flow rate of fuel f. The ambient temperature and pressure were held constant at 303K and 1.013 bar respectively because of location limitations. The optimization code was written in MATLAB programming language. The decision variables (constraints) were obtained randomly within the admissible range. The optimal values of the decision variables were obtained by minimizing the objective function (total exergy destruction). The choice of 300 generations was to enable the full utilization of the search space without putting strain on the computation time and complexity. The determined optimum values of the operating variables were r p = 12.41, ƞ ic = 86.40%, ƞ it =89.12%, T 3 =1,486.36K a =355.82kg/s and f =8.62kg/s. The obtained optimal values of r p , ƞ ic, ƞ it and T 3 were higher than their base values while that for a and f were less. Increased r p brings about higher thermal efficiency while increased ƞ ic guarantees less exergy destruction in the compressor. Increased ƞ ic and T 3 are crucial in decreasing the exergy destruction in the combustion chamber and in reducing the cycle fuel consumption. Reduced a and f play vital roles in the reduction of the total exergy destruction. They reduction also result in less emissions from the plant thereby decreasing the gas turbine's negative impacts on the environment. Suggested coatings of compressor blades will lead to increased compressor efficiency whereas thermal barrier coatings of the hot sections of the plant will increase the lifespan of the parts at the designed firing temperature. Thermal barrier coatings also allow increased firing temperature while still maintaining the original designed lifespan.

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“…According to [14] exergoeconomic analysis combines the exergy analysis with economic principles and incorporates the associated cost of the thermodynamic inefficiencies in the total product cost of the energy system. Exergoeconomic analysis has become a powerful tool for assessing the performance of energy conversion system for improving overall system efficiency and lowering life cycle costs of a thermodynamic system [15][16]. Exergoeconomics applied to design optimization provide the designer of an energyconversion plant with information not available through conventional energy, or cost analyses, but critical to the design of a cost-effective plant [17].…”

Section: It Is a Key Component In Obtaining Sustainablementioning

confidence: 99%

“…Ogbe et al [15] carried out a probabilistic exergoecominc analysis of four modeled industrial gas turbine units, two each of 100MW GE Engine and 25MW Hitachi Engine at Transcorp Power Plant in Ughelli, Delta State, Nigeria. From his results, the irreversibility of the gas turbines decreased with an increase in inlet temperature and is consistent with the report by Chand et al [7] in their analysis of 112.4MW single shaft in Genting Lanco, Vijayawad at ISO condition.…”

Section: It Is a Key Component In Obtaining Sustainablementioning

confidence: 99%

“…Generally, the average efficiencies of Ihovor Gas Power Plant are 59.32%, 60.83%, 59.80% and 60.38% for GT ONE, GT TWO, GT THREE and GT FOUR respectively. From the plant linear trend line the efficiency of the plant generally decreased with increase in temperature as increase in inlet air temperature leads to increase in irreversibility thus increasing exergy destruction rate [2,14,15,34,35].…”

Section: Exergeconomic Factor Fkmentioning

confidence: 99%

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Exergoeconomic analysis of Ihovbor Gas Power plant

Aliu

Ochornma

2018

Nig. J. Tech.

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Exergoeconomic parameters of Ihovbor Gas Power plant were determined in this study. To achieve this, the exergy of each stream, the economic cost of the plant components, the exergetic costs of each stream and the exergoeconomic evaluation of each component were determined. The average exergy efficiency of GTs ONE, TWO, THREE and FOUR were found to be 59.32%, 60.83%, 59.80% and 60.38% respectively and it decreased with increase in ambient temperature. The exergy destruction cost was greatest in the combustor (average of 1596.175$/hr), the relative cost difference was greatest in the air compressor with an average ratio of 0.36585, the exergoeconmic factor of the gas turbine was greatest (91.84%) and the average cost of power generation was found to be $0.0162/kWhr. Exergoeconomic parameters can be used as tools for energy audit and determining the running costs of power plants and power generation.

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Probabilistic Exergoeconomic Analysis of Transcorp Power Plant Ughelli

Cited by 3 publications

References 26 publications

Exergoeconomic Analysis of 21.6 MW Gas Turbine Power Plant in Riau, Indonesia

Exergoeconomic Analysis of 21.6 MW Gas Turbine Power Plant in Riau, Indonesia

Optimal Operating Parameters of 100MW Delta IV Ughelli Gas Turbine Power Plant Unit

Exergoeconomic analysis of Ihovbor Gas Power plant

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