Analysis of Gas Turbine Operation before and after Major Maintenance

Mrzljak, Vedran; Anđelić, Nikola; Lorencin, Ivan; Car, Zlatan

doi:10.18048/2019.57.04.

Cited by 3 publications

(2 citation statements)

References 35 publications

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“…A part of mechanical power produced in the gas turbine is used for the MTC and RTC drive (turbo-compressors are mechanical power consumers), while the remaining mechanical power produced in the turbine (useful power) is applied for the EG drive. The principle of mechanical power distribution is the same for closed-cycle and open-cycle gas turbines which drives any power consumer [40,41].…”

Section: Description and Operating Characteristics Of The Analyzed Wa...mentioning

confidence: 99%

Energy and Exergy Analysis of Waste Heat Recovery Closed-Cycle Gas Turbine System while Operating with Different Medium

Mrzljak

Kudláček

Šegota

et al. 2021

JMTS

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In this paper is performed energy and exergy analysis of waste heat recovery closed-cycle gas turbine system. Analyzed system can use waste heat from various main propulsors (gas turbines or internal combustion engines). Basically, the observed system operates by using CO2, what was the baseline for the analysis. It is investigated did the observed system, while retaining the same configuration, can operate with different operating mediums instead of CO2. Other observed operating mediums were Air and Helium. During the change in operating medium, pressures and temperatures in some system operating points cannot remain the same as in the process with CO2, but the intention was to perform only the necessary changes (to ensure proper operation of each system component). Obtained results show that the system, while retaining the same configuration, can operate by using different operating mediums. Energy analysis of the system shows that the whole configuration is composed to operate with CO2, because the whole system energy efficiency is much higher than in operation with Air or Helium. The energy efficiency of the whole system during operation with CO2 is 87.68%, with Air is 58.39% and operation with Helium gives energy efficiency of 49.25%. Exergy analysis of the observed system shows that the system has a good potential to operate with other mediums, because in any observed situation exergy efficiency of the whole system was higher than 50%. In this analysis the highest exergy efficiency of the whole system was obtained during operation with Air (57.76%). In the observed system, low-temperature regenerator and main turbo-compressor are detected as components which are highly influenced by the change of operating medium. Therefore, these two components should be a baseline for further improvements and system optimization.

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Section: Description and Operating Characteristics Of The Analyzed Wa...mentioning

confidence: 99%

Energy and Exergy Analysis of Waste Heat Recovery Closed-Cycle Gas Turbine System while Operating with Different Medium

Mrzljak

Kudláček

Šegota

et al. 2021

JMTS

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“…Nigeria has been incredibly fortunate to have natural resources (gas) but has not utilized these resources for its energy supply [4]. Gas turbines nowadays are essential components of combined power plants, Gas turbine process, and exhaust gas parameters play a major role in both the operation of the combined power plant's steam component and all of its constituents [5]. With Twenty (23) gasfired plants out of thirty generation stations in Nigeria, only 25% of the electricity generated is delivered to the end user [6].…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of Olorunsogo Gas-Fired Power Plant Phase I

Eko, Michael A.,

Ale, Thomas O.

2023

JERR

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Aim: The aim of this research is to evaluate the performance of the Olorunsogo gas-fired power plant phase 1, examines the reason(s) for not operating at full capacity, and proffers possible solution(s). Study of the Design: The power plant comprises of eight (8) numbers of 42MW unit gas turbine capable of evacuating 277MW. Methodology: To obtain electrical parameters from the gas turbine, a mathematical model for pressure using a simple open-cycle gas turbine was developed. The pressure was further converted to energy using principles of kinetic theory of gases. Hence, the efficiency and other performance indicators were calculated. Results: The study revealed an average operating capacity of 31.28MW. The average efficiency of the power plant in the period under review was 50.88%, as compared to the international standard practice of 65% and above. The average load factor and capacity factor was 11.25% and 11.54% respectively as compared to international standard practice of 50-80%, while the average reliability was 55.79%, as compared to international standard practice of 95%. Conclusion: The study further reveals that wastage of gas, downtime, and inadequate gas supply are the major factors against the full capacity operation of the power plant. The proffered possible solutions articulated in this study if implemented, will optimize the power plant's full-capacity operation.

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