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The scales form in heat exchanges after a period of operation and provide additional resistance to heat transfer with some heat transfer coefficient . The reciprocal of this scale heat transfer coefficient is called .
Extended heat transfer surface like fins are used to increase the heat transfer rate. Fin efficiency is defined as the ratio of heat transferred across the fin surface to the theoretical heat transfer across an equal area held at the
In a heat exchanger, the rate of heat transfer from the hot fluid to the cold fluid
For shell and tube heat exchanger, with increasing heat transfer area, the purchased cost per unit heat transfer area
Air is to be heated by condensing steam. Two heat exchangers are available (i) a shell and tube heat exchanger and (ii) a finned tube heat exchanger. Tube side heat transfer area are equal in both the cases. The recommended arrangement is
In which type of fluid flow, the velocity of flow of fluid changes from point to point in the fluid at any instant?
The process of heat transfer from one particle of the fluid to another by the actual movement of the fluid particles caused by some mechanical means, is known as
The process of heat transfer from one particle of the fluid to another by the actual movement of the fluid particles due to difference of density caused by temperature of the particle is known as
Fluid motion in the natural convection heat transfer between a solid surface and a fluid in contact with it, results from the
Controlling heat transfer film co-efficient is the one, which offers __________ resistance to heat transfer.