• 제목/요약/키워드: Industrial Gas Turbine

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A Study on Repair Case of Journal and Bearing Damage for 25MW Industrial Gas Turbine (25MW급 산업용 가스터빈의 저널과 베어링 손상 보수사례에 관한 연구)

  • Kim, Byung Ok;Sun, Kyung Ho;Lee, An Sung
    • The KSFM Journal of Fluid Machinery
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    • v.15 no.6
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    • pp.64-69
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    • 2012
  • This paper deals with the study on repair case of journal shaft and bearing damage in 25MW industrial gas turbine caused by sudden blackout, operation mistake, and logic abnormal, etc. When a serious accident such as journal and bearing damage in a gas turbine occurs, the domestic local companies having the gas turbine are dependent on manufacturer for all maintenance and repair schedule until now. This case study shows that the damaged gas turbine is normally re-operated itself in domestic by establishing repair schedule in a short period of time, repairing damage journal shaft and tilting pad bearings, and performing rotating test for a reliability check. This paper can be regarded as the important case study of emergency test run experience of the refurbished 25MW gas turbine rotor.

Status of Combustor Development for Industrial Gas Turbine (산업용 가스터빈 연소기 개발 현황)

  • Ahn, Chulju;Park, Heeho;Kim, Min-Ki;Kim, Myeonghyo;Jung, Seungchai;Kim, Kitae;Shon, Youngchang
    • 한국연소학회:학술대회논문집
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    • 2013.06a
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    • pp.113-116
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    • 2013
  • The Samsung Techwin has been developed the various types of combustor and fuel nozzle frontal devices for the aero engine and small scale industrial gas turbines. Currently, we have been developed the highly heat capacity and long-lived gas turbine combustor based on the short-lived combustor and fuel injector technologies. In this paper, the market trends and the information on the survey of an advanced gas turbine combustor were introduced for the development of large scale gas turbine combustor and fuel nozzle assembly.

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Study on Operational Plan of Hot Gas Parts for Cost Reduction of Gas Turbine with Cases Oriented (가스터빈의 운전유지비 절감을 위한 고온부품의 운영방안에 관한 연구 - 사례중심으로 -)

  • Yu, Won-Ju;Cho, Chi-Woon
    • Journal of the Korea Safety Management & Science
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    • v.11 no.1
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    • pp.93-101
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    • 2009
  • The use of the gas turbine for power supply is increasing recently. Accordingly, the operation and maintenance cost of the gas turbine is gradually increasing and the various efforts to cut the cost are needed. For an operation and maintenance cost saving of the gas turbine, reductions of the new purchasing charge and the reproduction repair cost of the hot gas parts are required through more effective operation and life management methods for the hot gas parts. The hot gas parts are the main parts of the gas turbine and they are replaced with the periodic. In this research, efficient operation and life management methods for the hot gas parts were presented with the cases. The methods were analyzed and verified based on real data and the cases for improving a lifetime were utilized in the field.

Performance degradation due to compressor fouling of an industrial gas turbine operating at design point condition (막오염에 의한 압축기 성능 저하가 발전용 가스터빈 설계점 성능에 미치는 영향에 관한 연구)

  • Seo, J.S.;Sohn, J.L.;Kim, J.H.;Kim, T.S.;Ro, S.T.
    • The KSFM Journal of Fluid Machinery
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    • v.6 no.3 s.20
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    • pp.36-43
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    • 2003
  • Operating performance of industrial gas turbines in combined cycle power plants depends upon atmospheric conditions. Compressor fouling caused by airborne particles in the atmosphere and their adhesions on compressor blades is one of critical phenomena related to the performance degradation of industrial gas turbines. Compressor fouling provokes increase of pressure loss in inlet duct, decrease of mass flow rate of intake air and decrease of compressor stage efficiency. In this study, impacts of compressor fouling on the performance of an industrial gas turbine operating at design point condition are investigated analytically. As results, it is found that the reduction of produced power with decreased mass flow rate of intake air caused by narrowed flow area by the adhesion of airborne particles on compressor blades is the most dominant impact on the gas turbine performance by the compressor fouling phenomena.

Critical Speed Analysis of a Small Gas Turbine Rotor (소형 가스터빈 회전체의 위험속도 해석)

  • Kim, Young-Cheol;Ha, Jin-Woong;Myung, Ji-Ho
    • The KSFM Journal of Fluid Machinery
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    • v.12 no.3
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    • pp.26-30
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    • 2009
  • This paper predicts the critical speeds of a 5MW industrial gas turbine by using commercial rotordynamic tool, DYNAMICS 4.3. The gas turbine is operated at 12,975 rpm on squeeze film dampers. The stiffness of the squeeze film dampers are estimated. The critical speeds of the gas turbine rotor are calculated to have a sufficient separation margin (2%) from the 1st bending mode and pass over 2 rigid body modes below 4,000 cpm. This paper discussed the coupling effects on the dynamic response of the gas turbine.

The Catalytic Combustor for Gas Turbines (가스터빈 촉매연소기의 개발 현황)

  • Lee, Dong-Hun;Lee, Kang-Yeop;Choi, Seong-Man
    • 한국연소학회:학술대회논문집
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    • 2003.12a
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    • pp.265-272
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    • 2003
  • Some catalytic reactors for industrial/generation gas turbines were reviewed and investigated to understand the current status and future prospect for ultra low NOx catalytic gas turbine combustor. Catalytic reactor which was applied to 1${\sim}$10MW class gas turbine has achieved the ultra low emission corresponding to less than 3ppm NOx and 10ppm CO. But the durability and sizing flexibility of catalyst is needed to improve the catalyst performance for commercial gas turbine operation.

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An Overview of the Gas Turbine & Tubomachinery Business at Samsung Aerospace Ind.,Ltd. (삼성항공의 가스터빈 사업 현황)

  • 정영기
    • Journal of the Korean Society of Propulsion Engineers
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    • v.3 no.4
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    • pp.104-108
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    • 1999
  • Samsung Aerospace Ind., Ltd. (SSA) has been involved in gas turbine and turbomachinery businesses since 1980. An overview is given of its gas turbine overhaul, parts manufacturing, and industrial turbo machinery businesses. It is hoped that interested people will find the current status and capabilities of Korean gas turbine industry as represented by SSA's Gas Turbine & Turbomachinery Division.

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Vibration Response Analysis of a Small Gas Turbine Rotor (소형 가스터빈 회전체의 진동응답 해석)

  • Kim, Young-Cheol;Ha, Jin-Woong;Myung, Ji-Ho
    • The KSFM Journal of Fluid Machinery
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    • v.13 no.3
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    • pp.18-23
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    • 2010
  • This paper predicts the unbalance and transient (start-up) response of a 5MW industrial gas turbine by using commercial rotordynamic tool, DYNAMICS 4.3. The gas turbine is operated at 12,975rpm on squeeze film dampers or tilting pad bearings. The stiffness and damping coefficients of the squeeze film dampers and tilting pad bearings are estimated. It is seen that the vibration amplitude of the gas turbine rotor is sufficiently small around the critical speeds and at the rated speed.

Domestic Gas Turbine Industry Development Strategies Based on Domestic Supply Chain and Potential Analysis (공급사슬 및 내재역량 분석을 통해 고찰한 국내 가스터빈 산업 국산화 개발 전략)

  • Hyun, Jungwoo;Lee, Sangkyun;Jin, Hwan Jun;Park, Chinho
    • Journal of Energy Engineering
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    • v.29 no.1
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    • pp.13-24
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    • 2020
  • Many countries are actively engaging in the reduction of greenhouse gas emissions, and as part of this effort, gradually reducing the portion of coal power generation and instead increasing the portion of power generations from renewable energy sources and natural gas. Korea is taking a similar policy to expand LNG power generation for the next decade. There is a concern, though, about the policy not being aligned with the domestic industry development, since only a few products are being made in Korea along the LNG power generation industry value chain. Therefore in this paper, we first looked at the current status of the gas turbine and high temperature parts industry used for LNG power generation in Korea, and then looked into the industrial issues and challenges through the analysis of supply chains of the domestic gas turbine industry. Finally, we tried to propose strategies to revitalize and localize the domestic gas turbine and high temperature parts industry. The proposed strategies can be summarized as 1) creation of domestic gas turbine manufacturing ecosystem via construction of gas turbine alliance, 2) strategic R&D support for localization of gas turbine and high temperature parts, and 3) provision of domestic testbeds for technology evaluation and commercialization.

A Study on NOx Emission Characteristics of An Industrial Gas Turbine (산업용 가스터빈의 NOx 배출 특성에 관한 연구)

  • Jeong, Jai-Mo;Park, Jung-Kyu
    • Journal of the Korean Society of Combustion
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    • v.9 no.1
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    • pp.11-17
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    • 2004
  • The purposes of this study are to analyze nitrogen oxides(NOx) formation mechanism and to reduce abnormal NOx emissions in gas turbines. Industrial gas turbines emissions have potential to negative affect to the atmosphere in many different ways such as photochemical smog, acid rain and global warming. In conventional gas turbine combustors, one of the main pollutants such as nitrogen oxide(NOx) species, are principally formed from combustion process of fuel with oxygen in the primary combustion zone, and their emission levels are highly depend on peak temperatures in the combustor. In order to examine the characteristics and the effect of NOx formation, we used gas turbine of which commercial operating in Korea. From the examination, it has been found that NOx emissions are relatively high at low load(output) and during combustion mode change. Also, the effect of Air/Fuel ratio was considered. As the Air/Fuel ratio was increased in Lean-Lean mode, the NOx emission was decreased. The results of this study indicated that NOx emission levels are highly depend on peak temperature and pressure of combustion process in the combustor.

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