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4.1.1 Liquid–Liquid
In liquid–liquid applications, the hot and cold sides can be mounted to either side of the
exchanger. In general, the hot side will be on the plate side and the cold liquid on the
shell side. Both sides are clearly marked on the drawings and heat exchangers. General
recommendation for flow directions are hot side down and cold side up, but special
directions can be specified during heat exchanger heat transfer calculation.
1-pass
2, 4-pass
1, 3-pass
1-pass openable
In condensing applications, the steam is on the shell side, with the cold side on the plate
side. Shell side (steam) flow enters the exchanger at the top of the shell and the con-
densate exits at the bottom. Plate side flow is counter-current: the exchanger operates
on the counter-current principle. Steam on the end plate side/cold side in the shell and
vent condenser designs are also possible.
4.1.2 Condenser
HOT OUT
HOT IN
HOT OUT
HOT IN
COLD OUT
COLD OUT
COLD IN
COLD IN
4.1.3 DX-Evaporator
