Results 211 to 220 of about 1,562 (254)

Gas Path Diagnostics for a Once-Through Steam Generator

Volume 3: Coal, Biomass, Hydrogen, and Alternative Fuels; Cycle Innovations; Electric Power; Industrial and Cogeneration; Organic Rankine Cycle Power Systems, 2019
Abstract The performance of a once-through steam generator (OTSG) is bound to degrade due to fouling during its operation. The fouling will result in the degradation of the heat transfer between hot gas and water or steam on both sides of the tubes within the OTSG, thereby causing degraded OTSG performance.
Yu-Zhi Chen, Yi-Guang Li, Mike A. Newby
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Dynamic modeling of a large once-through steam generator

Nuclear Engineering and Design, 1972
Abstract A mathematical model of a large counter-current heat exchanger for generation of supercritical steam was derived. The model consists of coupled, nonlinear, partial differential equations derived from the laws of conservation of mass, momentum, and energy pertaining to the compressible secondary fluid and the counterflowing incompressible ...
C.K. Sanathanan, A.A. Sandberg, F.H. Clark, O.W. Burke, R.S. Stone   +4 more
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Water Treatment for Once-Through Steam Generators

Journal of Petroleum Technology, 1965
Abstract Emphasis on steam flooding has led to a new steam generator, the once-through type. This new generator, in turn, has changed requirements for water treatment for the generator. This paper discusses the water sources, requirements for treating source water for steam generators, equipment necessary for ...
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Experimental Investigation of a Once-Through Coaxial Steam Generator

Journal of Spacecraft and Rockets, 1965
Tests were conducted on a straight-tube coaxial heat exchanger to determine heat-transfer rates for the generation of superheated steam from heat supplied by a solid-propellant, hotgas generator. Superheated steam at 1600°F and 1500 psia was generated by hot gas at 2200°F that was introduced into a coaxial counterflow tube-in-tube heat exchanger ...
H. E. KARIG, D. N. JACKLEY, L. G. HIDDE
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Minimum variance feedforward control of a once-through steam generator

Engineering Solutions for the Next Millennium. 1999 IEEE Canadian Conference on Electrical and Computer Engineering (Cat. No.99TH8411), 2003
Reliable operation of once-through steam generators (OTSG) of the continuous-tube type, as used for gas turbine heat recovery, requires tight regulation of final steam temperature, using feedwater flow as the controlled variable. The feedwater flow controller typically utilizes feedforward information concerning gas temperature and flow rate, as well ...
K. Gooden, P. Morgan, D. White, R. Rink
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Numerical studies of a helical coil once-through steam generator

Annals of Nuclear Energy, 2017
Abstract A Thermal Hydraulic analysis code for Helical Coil once-through Steam Generator (TH-HCSG) is developed in the present study in order to predict the heat transfer process and thermal hydraulic characteristics in vertical helical coil steam generators. The numerical model is programmed using a one-dimensional four-equation drift-flux model and
Genglei Xia, Yuan Yuan, Minjun Peng, Xing Lv, Lin Sun   +4 more
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A Nonlinear Dynamic Model of a Once-Through Subcritical Steam Generator

Journal of Dynamic Systems, Measurement, and Control, 1976
A dynamic thermal-hydraulic model of a once-through subcritical steam generator is presented which allows the investigation of power plant system transients. The three-section (economizer, evaporator, and superheater) model with time-varying phase boundaries is described by a set of nonlinear differential and algebraic equations derived from the ...
A. Ray, H. F. Bowman
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Dynamic characteristics analysis of a once-through heat recovery steam generator

Applied Thermal Engineering, 2020
Abstract A U-type once-through heat recovery steam generator (HRSG) is investigated in this paper and emphasis is laid on a mathematical model for its dynamic characteristics analysis. The model is built in the Matlab/Simulink environment based on the thermodynamics principles and conservations of mass, momentum, and energy. Genetic algorithm (GA) is
Wenjing Du, Jinbo Li, Baoqiang Yuan
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Flow Distribution in Forced-Circulation Once-Through Steam Generators

Journal of Fluids Engineering, 1934
Abstract Forced-circulation, once-through steam generators of large capacity are constructed of several parallel circuits connected between inlet and discharge headers. Unequal flow distribution between these circuits, possibly resulting in tube failure, may be due to unequal frictional resistances, unequal heat absorption, or improper ...
H. L. Solberg, G. A. Hawkins, A. A. Potter   +2 more
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Aperiodic Instability of a Once-Through Steam Generator with a Feedwater Line

Volume 2: Thermal Hydraulics, 2006
Aperiodic (static) flow instability is an instability related to the change of a flow direction in individual steam generating U-shaped channels operating at given pressure difference. The nature of an aperiodic instability is close to a Ledinegg instability [1] related to the presence of multiple flows at the full hydraulic curve of a U-shaped channel.
Jae-Kwang Seo, Han-Ok Kang, Juhyeon Yoon, Keung-Koo Kim   +3 more
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