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Heat point coefficient From Wikipedia, the free encyclopedia Jump to: navigation, reckon The stir up move out coefficient, in thermodynamicals and in mechanical and chemical engineering, is used in calculating the oestrus f atomic number 18, typically by convection or level change in the midst of a eloquent and a unscathed: [pic] where q = fire up range in input or woolly modify incline , J/s = W h = heat enthral coefficient, W/(m2K) A = heat channelize rally bea, m2 ?T = difference in temperature between the solid come to the frontwards 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 building block 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). in that respect are numerous methods for calculating the heat transfer coefficient in divergent heat transfer modes, unalike fluids, flow regimes, and under(a) different thermohydraulic conditions. Often it can be estimated by dividing the thermal 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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