Oxide scale thickness measurements are used in assessing the life of different components operating at high temperature environment. Such measurements provide an approximation for the temperature inside components such as reheater and superheater tubes. A number of failures were encountered in one of the boilers in one of Kuwaiti power plants. These failure were mainly in the first row of the p...

The failure analysis of reheater tubes were analyzed by means alloy composition analysis, metallographic structure mechanical properties and oxide analysis. results showed: meets the requirements 12Cr1MoV standard. No abnormality was observed in structure. Mechanical qualified. Oxide components are mainly O Fe. Comprehensive shows that main reason tube is oxygen corrosion, which caused thinning...

In this study, a real and significant industrial problem in a steam power plant was investigated. Reheater tubes in boilers are under the creep and the fireside corrosion mechanism that cause some of them to fail. Since the estimation of probability of failure (PoF) and remaining life (RL) is expensive and time consuming in the deterministic methods, in this work they were evaluated using struc...

The fluctuation in temperature and pressure boiler parts subjected to creep fatigue stress also fuel burnt steam generation leads corrosion various areas the boiler. Residual during manufacturing, vibration due flow over tube, mechanical vibrations, erosion abrasive nature of fuel, does occur boilers. All above, individually or combined lead material degradation different magnitude will failure...

Multi-input multi-output (MIMO) dynamic matrix control (DMC) technique is applied to control steam temperatures in a large-scale ultrasupercritical once-through boiler–turbine system. Specifically, four output variables (i.e., outlet temperatures of platen superheater, finish superheater, primary reheater, and finish reheater) are controlled using four input variables (i.e., two spray valves, b...

In order to control the power plant accurately, exact models of the reheater and attemperator are needed. But sometimes due to a lack of needful information and complex internal structure of the system, it is unadvisable to establish the dynamics model based on energy mass balance, physical rules and thermodynamics principles. In this paper, a generalized regression neural network(GRNN) is deve...

One of the main energy sources utilized to produce power is coal. Due lack combustion enhancement, issue with coal-based plants that they significant amount pollutants. The major problem slagging formation within boiler; it sticks water tube walls, superheater, and reheater. Slagging might decrease heat transferred from area or steam inside tubes, increasing coal extra air. abrupt fall slag on ...