외향 반경류 터빈의 예비설계에 관한 기초연구
A fundamental study on the preliminary design of a radial outflow turbine
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초록
최근 강화되는 배출가스 규제에 대응하여 친환경 발전 사이클이 주목받고 있다. 터빈은 발전 사이클의 효율에 있어 지대한 영향을 미치는 요소이다. 근래 발전 사이클용 외향 반경류 터빈에 관한 연구가 진행되고 있다. 외향 반경류터빈은 축류 터빈과 내향 반경류 터빈이 가진 이점을 모두 지니고 있기 때문이다. 터빈의 예비설계에 있어 목표 효율을 분명히 할 필요가 있다. 그러나 기존의 연구들은 터빈의 예비설계에서 목표 효율이 불분명하다. 본 연구에서는 목표효율을 입력변수로 사용하는 외향 반경류 터빈의 예비설계에 관하여 기초연구를 수행한다. 예비설계에 적합한 설계모델들을 고려하였으며, 외향 반경류 터빈의 목표 성능을 만족시키기 위한 독창적인 알고리즘을 제시하였다. 예비설계프로그램의 검증을 위하여 전산유체역학을 수행하였다. 그 결과, 외향 반경류 터빈의 설계에 있어 편향각이 중요한 변수임을 알 수 있었다. 편향각을 고려하여 노즐 깃과 로터 깃의 최적화를 수행하였다. 터빈의 최종형상에서 설계목표를 달성할 수 있었다.
Abstract
In recent years, eco-friendly power generation cycles have been attracting attention in response to enhanced emissions regulations. The turbine is a significant component in the efficiency of the power generation cycle. Currently, studies on the radial outflow turbine in power generation cycles have been carried out. This is because the radial outflow turbine has both the advantages of an axial flow turbine and a radial inflow turbine. It is necessary to clarify the target efficiency in the preliminary design of turbines. However, existing studies have unclear target efficiency in the preliminary design of turbines. In this paper, a fundamental study is conducted on the preliminary design of a radial outflow turbine that uses target efficiency as an input variable. Design models suitable for preliminary design of turbines were considered, and an original algorithm was presented to satisfy the target performance of the radial outflow turbine. Computational fluid dynamics analysis was performed for verification of preliminary design programs. The results showed that the deviation angle is an important variable in the design of the radial outflow turbine. The optimization of the nozzle and rotor blades was performed by considering the deviation angle. The design objectives were achieved in the final geometry of the turbine.
참고문헌 (20)
- J. S. Kim, "Experiment on radial inflow turbines and performance prediction using deep neural network for the organic Rankine cycle", Applied Thermal Engineering, 149, pp.633~643 (2019)
- 김준성, "해양온도차발전용 초월임계 이산화탄소 랭킨사이클의 열역학적 분석 및 최적화", 대한기계학회논문집 B, 42(11), pp.721~733 (2018), 대한기계학회
- D. Y. Kim, "Preliminary design and performance analysis of a radial inflow turbine for organic Rankine cycles", Applied Thermal Engineering, 120, pp.549~559 (2017)
- Y. Wang, "Aerodynamic design and numerical study for centrifugal turbine with different shapes of volutes", Applied Thermal Engineering, 131, pp.472~485 (2018)
- J. Bao, "A review of working fluid and expander selections for organic Rankine cycle", Renewable and Sustainable Energy Reviews, 24, pp.325~342 (2013)
- C. Spadacini, "Organic Rankine Cycle (ORC) Power Systems", pp.335~359 (2017), Elsevier
- A. M. Al Jubori, "Modelling and parametric analysis of small-scale axial and radial-outflow turbines for Organic Rankine Cycle applications", Applied Energy, 190, pp.981~996 (2017)
- D. Luo, "The design and analysis of supercritical carbon dioxide centrifugal turbine", Applied Thermal Engineering, 127, pp.527~535 (2017)
- C. Spadacini, "Geothermal Energy Exploitation with the Organic Radial Outflow Turbine", Proceedings World Geothermal Congress, pp.1~6 (2015)
- D. Maksiuta, "Study on applicability of radial-outflow turbine for 3MW WHR organic Rankine cycle", Energy Procedia, 129, pp.293~300 (2017)
- D. Y. Kim, "Preliminary design and performance analysis of a radial inflow turbine for ocean thermal energy conversion", Renewable Energy, 106, pp.255~263 (2017)
- E. Casati, "Centrifugal turbines for mini-organic Rankine cycle power systems", Journal of Engineering for Gas Turbines and Power, 136, pp.122607~ (2014)
- A. T. Sayers, "Hydraulic and Compressible Flow Turbomachines" (1990), McGraw-Hill
- "Mathworks MATLAB Manual", ~ (2016)
- H. Moustapha, "Axial and Radial Turbines" (2003), Concepts NREC
- R. H. Aungier, "Turbine Aerodynamics" (2006), ASME Press
- A method of performance estimation for axial-flow turbines, "D. G. Ainley", Aeronautical Research Council, ~, pp.Aeronautical Research Council Reports and Memoranda no. 2974 (1951)
- "ANSYS CFX 13.0 Modeling Guide", ~ (2010)
- "ANSYS CFX 13.0 Theory Guide", ~ (2010)
- E. Sauret, "Three-dimensional off-design numerical analysis of an organic Rankine cycle radial-inflow turbine", Applied Energy, 135, pp.202~211 (2014)