Overall Heat Transfer Coefficient For Cylinder. In total the temperature was mea sured in 9 different locations q 0 225 45 675 90 1125 135 1575 and 180 along one side of the cylinder fig. The overall heat transfer coefficient u is calculated as follows.
Calculate the overall heat transfer coefficient and determine which is the controlling heat transfer coefficient. An example of this concept applied to cylindrical geometry is illustrated by figure 7 which shows a typical combined heat transfer situation. The heat transfer coefficient is the proportionality coefficient between the heat flux and the thermodynamic driving force for the flow of heat ie the temperature difference δt.
Temperature distribution in a convectively cooled cylinder for different values of biot number bi.
Calculate the overall heat transfer coefficient and determine which is the controlling heat transfer coefficient. The overall heat transfer coefficient u is calculated as follows. Thus area is included in the equation as it represents the area over which the transfer of heat takes place. The overall heat transfer rate for combined modes is usually expressed in terms of an overall conductance or heat transfer.