U Heat Transfer Coefficient. Uc the clean overall heat transfer coefficient based on the outside area of the tube assuming no fouling new heat exchanger btuhft2of ud the design overall heat transfer coefficient based on the outside area of the tube taking into account fouling factors for both fluids btuhft2of ho outside fluid film coefficient btuhft2of. Correspondingly the convective heat transfer coefficient h the overall coefficient u o and the other fluid properties may vary substantially for the fluid if it experiences a large temperature change during its path through the convective heat transfer device.
Heat transfer hot oil. The u factor is defined by an expression analogous to newtons law of cooling. Overall heat transfer coefficient a heat exchanger typically involves two flowing fluids separated by a solid wall.
This is especially true if the fluids properties are strongly temperature dependent.
The u factor is defined by an expression analogous to newtons law of cooling. With these composite systems it is often convenient to work with an overall heat transfer coefficient known as a u factor. Overall heat transfer coefficient a heat exchanger typically involves two flowing fluids separated by a solid wall. Determine the area of this heat exchanger required for this performance.