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송기욱(G.W. Song),김의현(E.H. Kim),하정수(J.S. Ha),김종영(J.W. Kim) 대한기계학회 2002 대한기계학회 춘추학술대회 Vol.2002 No.3
화력발전 기술은 점차 대형화, 고온고압화하는 경향으로서 고효율/ 환경친화성 뿐만 아니라 안전성과 높은 신뢰성이 요구되기 때문에 1000㎿ 급의 초초임계압 발전설비의 개발이 요구되고 있다. 국내에서는 그동안 확보된 기술을 바탕으로 각종 실증 신뢰성 평가 기술을 개발하고자 한다. 아울러 기존의 초임계압 발전설비에서 얻어진 손상기구 및 수명평가 기술을 상호 보완하기 위하여 실험실적 기계 및 재료 특성을 구하는 것은 물론 실증 신뢰성 평가 기술을 확보하고자 한다. 이를 위하여는 보일러 설비는 가공성 및 용접성, 내식성 등의 특성 실험을 실제 규모의 모델로 수행하고자 한다. 터빈 설비에서는 고온에서 실험할 수 있는 시험용 로타를 설계하였다. 크리프 특성을 고려하기 위하여 500시간 운전이 가능한 고온 시스템을 구상하였다. 또한 핵심 부속기기의 실증 신뢰성 평가를 위하여 실제 운전조건에서 시험할 수 있는 시험계통을 설계 제작하고자 한다. As a result of the fuel cost increasement and the competitive environmental condition for the power plants, it became highly desirable to have a plant of high efficiency. The research and the development to raise the temperature and the pressure of steam have been actively undertaken to improve the efficiency of power plants in the world. The development plans of the Ultra Super Critical (USC) power plant system is undergoing. To develop those system, it is necessary to get the field evaluation tests for the reliability of new components and materials. This paper introduces the fundamental technologies for the life and the reliability test and a conceptional design test.
송기욱(G.W. Song),현중섭(J.S. Hyun),하정수(J.S. Ha),조선영(S.Y. Cho) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.11
Most domestic fossil power plant have exceeded 100,000 hours of operation with the severe<br/> operating condition. Among the critical components of fossil power plant, high temperature steam pipe<br/> system have had a many problems and damage from unstable displacement behavior because of<br/> frequent start up and shut down. In order to prevent the serious damage and failure of the critical<br/> pipe system in fossil power plant, 3-dimensional displacement measurement system were developed for<br/> the on-line monitoring system. 3-D Measurement system was developed with using the LVDT type<br/> sensor and rotary encoder type sensor, this system was installed and operated on the real power plant<br/> successfully. In the future time, network system of on-line diagnosis for critical pipe will be designed.
최우성(W.S. Choi),김봉수(B.S. Kim),김범신(B.S. Kim),송기욱(G.W. Song) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.5
Fossil power plants are requested to be more efficient and reliable for longer operation against frequent start-ups and load changes, recently. To aid utilities in this endeavor, various technologies have been developed that provide a systematic approach to life assessment of critical facilities. Steam turbine facilities such as turbine rotor, inner casing, especially, may suffer from more severe creep and fatigue damage under high temperature and high pressure conditions. However, until now, to evaluate remaining life of turbine facilities, qualitative / semi-quantitative analysis is carried out without standard guideline or procedure in Korea. In this paper, the procedure for assessing the life consumption of turbine facilities is proposed based on creep and fatigue, generally accepted as dominant damage mechanisms of turbine facilities. According to the standard procedure, more reliable life assessment of turbine facilities and more effective maintenance can be possible.
현중섭(J. S. Hyun),송기욱(G. W. Song),박정현(J. H. Park),하정수(J. S. Ha) 대한기계학회 2004 대한기계학회 춘추학술대회 Vol.2004 No.8
The piping system of fossil power plant is subject to a severe thermal range and usually operates well into the creep range. Cyclic operation of the plant subjects the piping system to mechanical and thermal fatigue mechanisms and poor or defective support assemblies can impose massive loads onto the system. In order to prevent the serious damage and failure of the critical pipe system in fossil power plants, 3-dimensional displacement measurement system was developed for the on-line monitoring. Two types displacement measurement systems were developed with LVDT type sensor and rotary encoder type sensors. These systems were installed and operated on the piping system of fossil power plant successfully.