Heat transfer coefficient
Quantity relating heat flux and temperature difference
Heat transfer coefficient
In thermodynamics, the heat transfer coefficient or film coefficient, or film effectiveness, is the proportionality constant between the heat flux and the thermodynamic driving force for the flow of heat (i.e., the temperature difference, ΔT ). It is used to calculate heat transfer between components of a system; such as by convection between a fluid and a solid. The heat transfer coefficient has SI units in watts per square meter kelvin (W/(m2K)). The total heat transfer rate for combined modes and system components is usually expressed in terms of an overall heat transfer coefficient, thermal transmittance or U-value. The heat transfer coefficient is the reciprocal of thermal insulance. This is used for building materials (R-value) and for clothing insulation. There are numerous methods for calculating the heat transfer coefficient in different heat transfer modes, different fluids, flow regimes, and under different thermohydraulic conditions. Often it can be estimated by dividing the...
Read on Wikipedia · Image mitopencourseware, CC BY-SA 4.0
Open boosters, collect cards and trade them. Free to play.
Play for free