gea - phe101
TRANSCRIPT
GEA Heat Exchangers /
GEA PHE Systems
PHE University at GEA PHE Systems North America
PHE 101 – Anatomy and Function of a Plate Heat
Exchanger
Jon Paulos, Manager of Business Development
Revised 5 November 2010
Company
Confidential GEA Heat Exchangers/ GEA PHE SystemsJon Paulos, November 2010
Contents of this Session.
What is a plate heat
exchanger?
- Heat Exchanger definition.
- Plate Heat Exchanger
definition.
How does a plate heat
exchanger work?
- Gasketed
- Brazed
- Welded
Components
Company
Confidential GEA Heat Exchangers/ GEA PHE SystemsJon Paulos, November 2010
What is a plate heat exchanger?
A heat exchanger is a vessel used to transfer
heat from one medium to another without
allowing the respective media (fluids or
gasses) to mix and become cross-
contaminated.
A plate heat exchanger (PHE) is a heat
exchanger that uses multiple layers of
corrugated plates, with two media running in
alternate layers, transferring heat from one
media to the other.
Company
Confidential GEA Heat Exchangers/ GEA PHE SystemsJon Paulos, November 2010
How does a PHE work?
Shown here is
an exploded
view of a typical
plate heat
exchanger.
This is called a
“countercurrent”
or “counterflow”
design because
the two media
flow “counter” to
each other, in
opposite
directions.
One media enters at the top,
flows through every other
channel, then leaves at the
bottom.
The other media enters
at the bottom, flows
through the remaining
channel, then leaves at
the top.
Company
Confidential GEA Heat Exchangers/ GEA PHE SystemsJon Paulos, November 2010
How does a PHE work?
Here’s another view of
the same heat
exchanger.
This is called a “single
pass” design because the
two media pass each
other only once within the
heat exchanger.
Single pass designs
account for the majority
of plate heat exchanger
designs, but “multi-pass”
designs are common.
Company
Confidential GEA Heat Exchangers/ GEA PHE SystemsJon Paulos, November 2010
How does a PHE work?
This is a multi-pass
design, called that
because the two
media pass each
other more than one
time within the heat
exchanger.
This example is a
“two-pass” design.
Company
Confidential GEA Heat Exchangers/ GEA PHE SystemsJon Paulos, November 2010
Basic Anatomy for a Gasketed PHE
Support
Foot
Follow Pressure
Plate
Base Pressure
Plate
Tie Rod Assembly
- Threaded Rod
- Cast Bushings (Lock Bushing at
Base end, Thrust Bushing at
Follow end).
- Locknut
- Lockwasher
Gasket
Heat Transfer
Plate
Support
Leg
Guide (or Lower)
Beam
Carry (or
Upper) Beam
Connection
Company
Confidential GEA Heat Exchangers/ GEA PHE SystemsJon Paulos, November 2010
Basic Anatomy for Brazed PHE
This example is a single-pass
design.
Pressure
Reinforcement
Plate (aka the
“Bottom” Plate)
Heat
Transfer
Plate Stack
Pressure
Reinforcement
Plate (aka the
“Top” plate)
Connection
(there are
multiple types)
Mounting Stud
(does not go
through the
unit)
Company
Confidential GEA Heat Exchangers/ GEA PHE SystemsJon Paulos, November 2010
Basic Anatomy for a Fully Welded Bloc PHE
Bloc heat exchangers
are cross-flow in
design (vs. the
counterflow seen
earlier).
Shown here is a 4-
pass design, where
the two media pass
each other 4 times.
Plate Pack Top HeadPanel
Gasket Panel
Primary Side
Connection
Column
SupportBottom Head
BaffleSecondary Side
Connection
Company
Confidential GEA Heat Exchangers/ GEA PHE SystemsJon Paulos, November 2010
Plate Corrugations
Because plate heat exchangers transfer heat
most efficiently when there is a lot of
turbulence in the media, they always have
corrugations embossed in the heat transfer
plates.
Shown here is an example of a Brazed PHE
heat transfer plate.
Corrugation patterns vary according to
requirements of each application.
Company
Confidential GEA Heat Exchangers/ GEA PHE SystemsJon Paulos, November 2010
Plate Corrugations
The heat transfer efficiency of
the plate also relies on the even
flow of media over the entire
area (the Heat Transfer Surface
Area).
This frequently requires a
special area near the port,
designed to distribute the media
across the entire Heat Transfer
Surface Area.
Because liquid media takes the
path of least resistance, the
distribution area ensures full
use of the Heat Transfer
Surface Area by spreading the
media evenly across the face of
the plate. (NT150S H Gasketed PHE plate shown)
Media enters
here.
Distribution area
spreads media.
Heat Transfer
Surface Area.
Note the
corrugations.
Media leaves
here.
Company
Confidential GEA Heat Exchangers/ GEA PHE SystemsJon Paulos, November 2010
More Information
For more information, contact us:
- Phone: 717-268-6200
- Email: [email protected]
- Fax: 717-268-6119
Or go to our web site:
- www.gea-phe.com/usa
Select Brazed PHE’s directly at:
- www.flatplateselect.com