Heat Transfer
HEAT EXCHANGERS
Summary
The important information in this chapter is summarized below.
Heat Exchangers Summary
Heat exchangers remove heat from a high-temperature fluid by
convection and conduction.
Counter-flow heat exchangers typically remove more heat than
parallel flow heat exchangers.
Parallel flow heat exchangers have a large temperature difference at
the inlet and a small temperature difference at the outlet.
Counter-flow heat exchangers have an even temperature difference
across the heat transfer length.
Regenerative heat exchangers improve system efficiency by
returning energy to the system. A non-regenerative heat exchanger
rejects heat to the surroundings.
The heat transfer rate for a heat exchanger can be calculated using
the equation below.
Q
Uo Ao DTlm
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