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A Multi-layered Integral Approach to the de-icing process
Get PDFThe modification of the shallow water icing model to handle de-icing phenomenon is the main focus of this study. As stated in the original model [1], the runback water is modeled utilizing a lubrication assumption for the water film velocity profile. A constant film temperature Tf(t,x) is then calculated under the thin-film hypothesis. Unlike the simplified icing model, the temperature field within the ice layer Tice(t,x,z) is no longer assumed to be constant. Instead, a temperature profile is utilized, enabling the generation of a static film on the wall when a heat conduction source term from a resistance is present [2]. A Temperature profile Ts(t,x,z) is also used in the static film layer if the model predicts the occurrence of this state. In the energy equation for both the solid ice and liquid portion of the static water film, transverse transfers are not considered, a 1D heat equation is then resolved. An integral approach and proper boundary conditions are used to close the problem. The validity of the integral method deteriorates as the thickness over which vertical integration is performed increases. To avoid this problem, a multi-layer approach is proposed. The thickness of the ice block is then divided into three layers of identical thickness. The purpose of this study is to offer a straightforward and robust method suitable for conducting industrial test cases. The model will first be introduced, followed by a description of the numerical approach. Subsequently, validation test cases will be conducted. Realistic de-icing scenarios will then be designed to evaluate the model [3]. Additionally, non uniform roughness effects will be examined
ENERGÍA NUCLEAR: UNA ALTERNATIVA VÁLIDA PARA LAS INVERSIONES SOSTENIBLES - FULL PAPER
No full textEn medio de la crisis climática y la demanda de soluciones sostenibles, la energía nuclear ha resurgido como una opción clave para reducir las emisiones de carbono sin comprometer la generación energética. No obstante, enfrenta desafíos como la percepción pública, los riesgos de accidentes y la gestión de residuos radiactivos. A pesar de no emitir dióxido de carbono durante su operación, su papel en la transición hacia una economía de bajas emisiones depende de superar tanto barreras técnicas como prejuicios sociales. Este estudio explora cómo la energía nuclear puede contribuir de forma efectiva y sostenible en la lucha contra el cambio climático. Y a la vez, investiga la viabilidad de la energía nuclear dentro del ámbito de las inversiones sostenibles, detallando un universo de inversión en tecnologías nucleares e instrumentos financieros que apoyan la transición hacia un futuro energético descarbonizado
A Novel EHD-Jet System to Achieve High Performance in Terms of Energy Consumption and Heat Transfer
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On the Use of Representative Inhomogeneous Poisson-Voronoi Tessellations for Brittle Fragmentation Modelling
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