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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 .
A multiple effect evaporator as compared to a single effect evaporator of the same capacity has
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For shell and tube heat exchanger, with increasing heat transfer area, the purchased cost per unit heat transfer area
The heat capacity of a solid compound is calculated from the atomic heat capacities of its constituent elements with the help of the
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
Steam economy in case of a triple effect evaporator will be
If we increase the pressure on a substance (which is at its triple point), then the triple point
A single pass air heater is connected to a two pass unit. For the air flow rate and other conditions remaining the same, the film heat transfer co-efficient for air will vary in the ratio of