In cases where the heat transfer coefficient is independent, or relatively independent, of the temperature difference between object and environment, Newton's law is followed.
42.
There are numerous methods for calculating the heat transfer coefficient in different heat transfer modes, different fluids, flow regimes, and under different heat transfer fluid applications.
43.
This equation uses the overall heat transfer coefficient of an unfouled heat exchanger and the fouling resistance to calculate the overall heat transfer coefficient of a fouled heat exchanger.
44.
This equation uses the overall heat transfer coefficient of an unfouled heat exchanger and the fouling resistance to calculate the overall heat transfer coefficient of a fouled heat exchanger.
45.
Where q represents the heat flux, h represents the heat transfer coefficient, T _ w represents the wall temperature and T _ f represents the fluid temperature.
46.
A somewhat better estimate by replacing k _ { air } / r _ { tube } \ rightarrow h _ c by an effective convective heat transfer coefficient.
47.
In addition, fill volumes ( i . e . wetted area ), specific heat, heat transfer coefficient have to be determined to arrive at a correct value.
48.
The heat transfer coefficient is often relatively independent of temperature in purely conduction-type cooling, but becomes a function of the temperature in classical natural convective heat transfer.
49.
The calibration factor ( or the overall heat transfer coefficient ) are affected by the product composition, process temperature, agitation rate, viscosity, and the liquid level.
50.
As the thermal conductivity of the vapor is much less than that of the liquid, the convective heat transfer coefficient and the heat flux reduces with increasing temperature difference.
