Global ETD Search
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Showing 1 to 18 of 18 for “"Steam Temperature"”.
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Steam temperature regulation in fossil power plants
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2001.
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Steam temperature and flow maldistribution in superheater headers
Heat exchangers and steam headers are at the heart of any boiler and are susceptible to a range of failures including tube leaks, ligament cracking, creep and fatigue. These common forms of header failure mechanisms can be exacerbated by local thermal stresses due to temperature and flow …
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Neural network based hybrid modelling and MINLP based optimisation of MSF desalination process within gPROMS: Development of neural network based correlations for estimating temperature elevation due to salinity, hybrid modelling and MINLP based optimisation of design and operation parameters of MSF desalination process within gPROMS
… sector in the desalination industry. Top Brine Temperature (TBT) (boiling point temperature of the feed seawater in the first stage of the process) is one of the many important parameters that affect optimal design and operation of MSF processes. For a given pressure, TBT is a function of …
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Experimental and numerical investigation of hydrogen production in a microwave oven
… applications. Yet, hydrogen production from steam plasma is one of the least researched techniques and lacks experimental and numerical studies. Hence, in this thesis, hydrogen production through steam plasma is experimented in a microwave oven. Moreover, pure steam plasma is numerically …
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Detailed model for robust feedback design of main steam temperatures in coal fired boilers
Main steam temperatures play a significant role in large coal fired power plant operation. Ideally, main steam temperatures should be accurately controlled to protect the thick wall components against long term overheating and thermal stress while meeting the design conditions at the steam turbine …
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Design of a fault tolerant control scheme based on sliding mode for Canadian supercritical water reactor
… performance was maintained and the variation of steam temperature within design limit was guaranteed.
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A 10 kilowatt-thermal input multiple effect distillation pilot for concentrated solar power and desalination of seawater plant
… to the first MED stage, reducing required motive steam pressure. Capture of unused thermal losses from low temperature sources, to heat the TVC inlet motive steam, reduces the required motive steam temperature. The results of a parametric study confirm the Brayton power cycle analysis that the use …
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Thermal Modeling of Vacuum Assisted Steam Pasteurization for Improved Product Safety of Low Water Activity Foods
Vacuum assisted steam pasteurization is a common method used to kill harmful pathogens on low water activity foods (LWAFs). During this treatment process it is generally believed that the steam will quickly penetrate through the small gaps within a package of product and condense on the surfaces …
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Characterization of the robustness of superhydrophobic surfaces during condensation
… conditions at room (~25°C) and elevated (~50°C) temperatures. The continuous condensations tests were run at a steam temperature of 27°C as well as 100°C. To understand the change in surface properties over the duration of the tests, the surface contact angle was chosen as the metric to be …
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Steam Explosion Pretreatment of Cotton Gin Waste for Fuel Ethanol Production
… This study focused on the use of steam explosion as the pretreatment method. Steam explosion treatment of biomass has been previously described to increase cellulose accessibility. The governing factors for the effectiveness of steam explosion are steam temperature and retention …
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Statistical Modeling and Analysis of Bivariate Spatial-Temporal Data with the Application to Stream Temperature Study
Water temperature is a critical factor for the quality and biological condition of streams. Among various factors affecting stream water temperature, air temperature is one of the most important factors related to water temperature. To appropriately quantify the relationship between water and air …
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Nuclear renewable oil shale hybrid energy systems : configuration, performance, and development pathways
… would operate steadily at full power, providing steam for shale heating in closed steam lines when the price of electricity is low and electricity to the grid when the price of electricity is high. Because oil shale has low thermal conductivity, heat input to the shale can be cycled as needed …
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Integrated optimization of hybrid steam-solvent injection in post-CHOPS reservoirs with wormhole networks and foamy oil behaviour under uncertainty
… to a higher oil recovery than expected. Hybrid steam-solvent injection has been considered as the most effective recovery method for heavy oil reservoirs; however, the existence of wormhole networks makes it technically and operationally challenging and foamy oil may be artificially induced. …
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Localization with the EnKF for the Automatic History Matching of the SAGD Processes
… successfully applied to data assimilation in Steam Assisted Gravity Drainage (SAGD) processes, but applications of localization for the EnKF in SAGD processes have not been studied. Distance-based localization has been reported to be very efficient for assimilation of large amounts of …
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Fluidised bed gasification of high-ash South African coals : an experimental and modelling study
… show that stable gasification is possible at temperatures between 880 °C and 980 °C. The maximum fixed carbon conversion achievable in the pilot plant is, however, limited to ± 88% due to the low reactivity of the coals tested and to thermal fragmentation and attrition of the coal in the …
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Steam condensation in flattened-tube air-cooled condensers
… pair. Air-cooled condensers cool the process steam by forced-convection of air, replacing the water evaporation found in traditional power-plant designs. Air-cooled condensers are rising in prominence because they provide utility companies with additional freedoms – to build power plants away …
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MSF process modelling, simulation and optimisation : impact of non-condensable gases and fouling factor on design and operation. Optimal design and operation of MSF desalination process with non-condensable gases and calcium carbonate fouling, flexible design operation and scheduling under variable demand and seawater temperature using gPROMS.
… takes into consideration the effect of stage temperature on the calcium carbonate fouling resistance in the flashing chambers in the heat recovery section, heat rejection section, and brine heaters of MSF desalination plants. The effect of seasonal variation of seawater temperature and top …
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Simulation, optimisation and flexible scheduling of MSF desalination process under fouling. Optimal design and operation of MSF desalination process with brine heater and demister fouling, flexible design operation and scheduling under variable demand and seawater temperature using gPROMS.
… heater fouling factor with varying seawater temperatures (during the year) on the plant performance and the monthly operating costs for fixed water demand and fixed top brine temperature are then studied. The total monthly operation cost of the process are minimised while the operating …