Introduction to Heat
Exchanger
A heat exchanger can be dened as
any device that transfers heat from
one uid to another or from or to a
uid and the environment.
Whereas in direct contact heat
exchangers, there is no intervening
surface between uids
In indirect contact heat exchangers,
the customary denition pertains to
a device that is employed in the
transfer of heat between two uids
or between a surface and a uid
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