Heat exchangers
Heat exchangers are devices where two moving fluid streams
exchange heat without mixing.
Heat is transferred from the hot fluid to the cold
one.
Under steady operation, the mass flow rate of each
fluid stream flowing through a heat exchanger remains constant.
w = 0, Dke = 0, Dpe = 0
Heat exchangers are intended for heat transfer
between two fluids within the device.
Usually, the entire heat exchanger is selected as
the control volume and Q becomes zero.
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