• Title/Summary/Keyword: 열소비율

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A Technique of the Combined Cycle Heat Rate Allocation for the On-Line Performance Monitoring System (복합화력 온라인 성능감시 구현을 위한 열소비율 분담 기법)

  • 주용진;김시문
    • Journal of Energy Engineering
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    • v.13 no.3
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    • pp.173-180
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    • 2004
  • A technique of the heat rate allocation was devised to monitor the performance of Combined Cycle Power Plant. This calculates the expected heat rate of current conditions and compares it with actual values. Loss allocation in heat rate is reconciled by calculating the magnitude of the deficiency contributed by major components, such as the gas turbine, heat recovery steam generator (HRSG), steam turbine and condenser. Expected power output is determined by a detailed model and correction curves of the plant.

Uncertainty Estimation Model for Heat Rate of Turbine Cycle (터빈 사이클 열소비율 정확도 추정 모델)

  • Choi, Ki-Sang;Kim, Seong-Kun;Choi, Kwang-Hee
    • Proceedings of the KSME Conference
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    • 2004.11a
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    • pp.1721-1726
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    • 2004
  • Heat rate is a representative index to estimate the performance of turbine cycle in nuclear power plant. Accuracy of heat rate calculation is dependent on the accuracy of measurement for plant status variables. Uncertainty of heat rate can be modeled using uncertainty propagation model. We developed practical estimation model of heat rate uncertainty using the propagation and regression model. The uncertainty model is used in the performance analysis system developed for the operating nuclear power plant.

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The steam turbine condenser pressure optimization with different heat rate correction curves (각기 다른 열소비율 보정곡선을 갖는 증기터빈의 최적 복수기 운전압력 설정)

  • Cho, Cheon-Hwan;Baek, Nam-Ho;Hur, Jin-Hyek;Lee, Jae-Heon;Moon, Seung-Jae;Yoo, Ho-Sun
    • 한국전산유체공학회:학술대회논문집
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    • 2008.03b
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    • pp.224-227
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    • 2008
  • The present study performs a test of a change in a condenser pressure on two kinds of power plants having different condenser pressure-heat rate correction curve and evaluates the results. According to a result of the test, it is confirmed that a sub-critical drum type steam power plant is optimally operated at the condenser pressure of 38㎜Hga that is designed, even during winters. On the other hand, it can be found that a supercritical once through type steam power plant operated at the condenser pressure that is reduced below a design value, that is, up to 28㎜Hga during winters is advantageous in view of turbine efficiency and is operated without a problem in facility operation such as moisture erosion, turbine vibration, etc. Also, the present study compares and reviews a condenser pressure-heat rate correction curve proposed by a manufacturer and a test value. The present study proposes optimum condenser operation pressure capable of concurrently satisfying the stable operation and efficiency improvement of the power plant facility that is operating, making it possible to support an efficient operation of a power plant.

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A Study on Minimizing of Condenser Pressure Loss according to the Temperature Rise of the Seawater for Korean Standard Coal-fired Power Plants (표준석탄화력 발전소 해수온도 상승에 따른 복수기 압력 손실 최소화 방안)

  • An, Hyo-Yoel;Moon, Seung-Jae
    • Plant Journal
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    • v.11 no.2
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    • pp.45-51
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    • 2015
  • In this paper, studied condenser operating management which is affecting power plants efficiency considering the cost of poor quality. Sea water temperature and condenser pressure have clear correlation in S power plants. As the sea water temperature changes, condenser pressure changed -1.7~+20 mmHg from design condenser pressure(38.1 mmHg). Use the heat rate correction curve from manufactory company, realized that efficiency and cost of poor quality changed 0.0201%, 12,830 won/h at Unit #1,2 but 0.0155%, 9,832 won/h when condenser pressure 1 mmHg rise. Also, checked that it is changed depend on seasonal corresponding operation, plant ageing and the point of preventive maintenance like overhaul maintenance. This study said if we considered complying with management range and planning overhaul maintenance, then it could help reducing operating maintenance losses minimum 2.5 billion won per 1 year (case : Unit #1, forty days maintenance).

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Analysis on the Energy Balance and Performance Variation of the Power Plant by using the Heavy Residual Oil (중질잔사유 적용시 발전플랜트의 에너지 수지 및 성능 변화 분석)

  • Park, Ho-Young;Kim, Tae-Hyung
    • Journal of Energy Engineering
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    • v.17 no.2
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    • pp.107-115
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    • 2008
  • The numerical analysis of energy and material balance, and plant performance has been carried out when applying the heavy residual oil instead of heavy oil to the existing heavy oil power station. The performance analysis model has been constructed for A heavy oil power station in Korea, and the modeling results were compared with the design data in order to ensure the validity of the model, and further compared with the plant operation data. With the heavy residual oil, the simulation gave 315 MW in power output, which is higher than that of the heavy oil combustion, but the plant efficiency turned out to be lower. The sensitivity analysis of heat rate for the changes in cooling water and ambient temperature, flue gas recirculation and power output has provided valuable information for the optimal operation of the power station.

A Study on the Diagnosis of Thermal Performance in the Steam Turbine for Generation (발전용 증기터빈 열성능 진단에 관한 연구)

  • Kim, Kwang-Hong;Hong, Eun-Kee;Hwang, Kwang-Won;Jang, Chul-Ho;Kim, Si-Moon
    • Proceedings of the KSME Conference
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    • 2007.05b
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    • pp.3236-3240
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    • 2007
  • This paper describes the results of steam turbine performance tests. The objectives of performance test is to exactly evaluate the degradation(decrease in performance) of the coal-fired steam turbine generator in order to provide plant information to help performance engineers identify problems, improve performance, and make economic decisions about scheduling maintenance and optimizing operation. To achieve these goals, the periodic thermal performance tests have been carried out since the initial operation period, 1997. We made the calculation program and guidelines for the tests and developed the performance index of the turbine cycle on the basis of the ASME PTC. By comparing the performance changes throughout the whole operation period, we confirmed the performance reliabilities of the turbine and its conditions.

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A Study on the Evaluation of Turbine Efficiency through the Performance Test of New Power Plant (신규 화력발전소의 성능 시험을 통한 터빈 효율의 평가에 관한 연구)

  • Kweon, Y.S.;Chung, H.T.;Jung, Y.B.
    • Journal of Power System Engineering
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    • v.5 no.1
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    • pp.11-20
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    • 2001
  • Super-critical type steam power plant, which operates with steam pressure above the super-critical point, has a good reputation recently and is adopted as a new standard of the Korean Electric Power Corporation. The reason for the good reputation lies in it's superior power efficiency. However, the field data of the new power plant for the verification of it's performance are still insufficient, and more empirical data are needed to acquire technologies on the effective operation of it. In this study, the authors analyzed the field test data on power efficiencies got in a super-critical type steam power plant, and evaluated the excellency of the new plant by comparing the efficiency data with the one got in a conventional sub-critical type steam power plant.

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