Exergy Analysis of a Power Plant in Abu Dhabi (UAE)

Alhosani, Omar Mohamed; Alhosani, Abdulla Ali; Dadach, Zin Eddine

doi:10.5963/ijee0503001

Cited by 2 publications

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“…On the other hand, the compressor had the lowest exergy destruction (12.4%). From the design conditions, results show that, during summer weather conditions, the power plant lost 7.6 MW (4.66%) and 4.61% of its exergy efficiency [7].…”

Section: Introductionmentioning

confidence: 99%

Exergy Efficiency and Environmental Impact of Electricity of a 620 MW-Natural Gas Combined Cycle

Almansoori¹,

Dadach²

2018

JPEE

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In the first part of this investigation, a Natural Gas Combined Cycle (NGCC) producing 620 MW of electricity was simulated using the commercial software Aspen Hysys V9.0 and the Soave-Redlich-Kwong (SRK) equation of state. The aim of this second part is to use exergy-based analyses in order to calculate its exergy efficiency and evaluate its environmental impact under standard conditions. For the exergy efficiency, the performance index under investigation is the exergy destruction ratio (y D ). The results of the study show that the combustor is the main contributor to the total exergy destruction of the power plant (y D = 24.35%) and has the lowest exergy efficiency of 75.65%. On the other hand, the Heat Recovery Steam Generator (HRSG) has the lowest contribution to the exergy destruction (y D = 5.63%) of the power plant and the highest exergy efficiency of 94.37%. For the overall power plant, the exergy efficiency is equal to 53.28%. For the environmental impact of the power plant, the relative difference of exergy-related environmental impacts (r b ) is utilized as the performance index for each equipment of the plant and the environmental impact of a kWh of electricity (EIE) is used to represent the performance index of the overall power plant. In agreement with the exergy analysis, the results indicate that the combustor and the HRSG have respectively the highest (r b = 32.19%) and the lowest (r b = 5.96%) contribution to the environmental impact. The environmental impact of a kWh of electricity of the power plant is 34.26 mPts/kWh (exergy destruction only), and 34.42 mPts/kWh (both exergy destruction and exergy loss).

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Section: Introductionmentioning

confidence: 99%