# There are two methods of constructing heat exchangers: plate type and tube type.
# Parallel flow - the hot fluid and the coolant flow in the same direction.
# Counter flow - The hot fluid and the coolant flow in opposite directions.
# Cross flow - the hot fluid and the coolant flow at 90° angles (perpendicular) to each other.
# The four heat exchanger parts identified were:
Tubes
Tube Sheet
Shell
Baffles
# Single-pass heat exchangers have fluids that pass each other only once.
# Multi-pass heat exchangers have fluids that pass each other more than once through the use of U tubes and baffles.
# Regenerative heat exchangers use the same fluid for heating and cooling.
# Non-regenerative heat exchangers use separate fluids for heating and cooling.
