Indirect contact heat exchangers are preferred over direct contact heat exchangers, because

Related MCQs

• 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
• The average heat transfer co-efficient over the entire length of the plate (ha) and the local heat transfer co-efficient (hL), in case of heat transfer over a flat plate in laminar zone is related as
• For large heat transfer area requirement, shell and tube heat exchanger is preferred, because it
• In heat exchangers, degree of approach is defined as the difference between temperatures of
• In counter flow heat exchangers
• Multipass heat exchangers are used
• Finned tube heat exchangers
• LMTD for evaporators & condensers for a given terminal parameters & set of conditions for counter-flow is equal to that for parallel flow. In such heat exchangers, with one of the fluids condensing or evaporating, the surface area required is the least in the __________ flow.
• Double pipe heat exchangers are used
• Heat exchangers operating, when the asymptotic range is reached,