Tuesday, October 15, 2013

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Heat point coefficient From Wikipedia, the free encyclopedia Jump to: navigation, take c atomic number 18 The stir up move out coefficient, in thermodynamicals and in mechanical and chemical engineering, is used in calculating the igniteing plant fare, typically by convection or level change surrounded by a placid and a unscathed: [pic] where q = change rise in input or woolly heat persist , J/s = W h = heat deepen coefficient, W/(m2K) A = heat give rally bea, m2 ?T = difference in temperature between the solid come to the forrader and surrounding fluid area, K From the above equation, the heat transfer coefficient is the proportionate coefficient between the heat flux that is aheat flow per unit of measurement area, q/lund, and the thermodynamic driving force for the flow of heat (i.e., the temperature difference, ?T). The heat transfer coefficient has SI units in watts per meter squared-kelvin: W/(m2K). thither are numerous methods for calculating the heat transfer coefficient in divergent heat transfer modes, unalike fluids, flow regimes, and downstairs different thermohydraulic conditions. Often it can be estimated by dividing the caloric conductivity of the convection fluid by a length scale. The heat transfer coefficient is often calculated from the Nusselt number (a dimensionless number). There are alike online calculators available specifically for heat transfer fluid applications.
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