Overall Heat Transfer Coefficient Water. Overall heat transfer coefficient is expressed as wm2 c or kcalh m2 c. In order to model this i assumed two heat transfer processes to calculate the two overall heat transfer coefficients.
The overall heat transfer coefficient r resistances to heat flow in pipe wall kw other parameters are as above. To facilitate example calculations below the following values may be used as a reference for the convective heat transfer coefficients. 12 0 btuhr ft 2 f.
Ce n т t.
When more information about the fluids and process is available one can use the overall heat transfer coefficient values. Thus area is included in the equation as it represents the area over which the transfer of heat takes place. Water to gasoline or kerosene 3001000. Calculate the heat exchanger area.