|
 GUPEX® air-to-air
crossflow heat exchangers, made of
glass fiber reinforced plastic, are increasingly cost effective with the escalation of energy prices.
Designed for heat recovery from polluted, moist and corrosive air
and gas emissions and humid flue gas as as well as heat recovery from low
to medium temperature air, which is a
substantial energy area largely ignored up until now. Retro–fitting of air-to-air waste heat recovery and heat exchanger batteries in industrial processes has never been more cost effective.
GUPEX® air to air (gas to gas) plate heat exchanger unit are designed for exhaust air handling in dusty
and humid environments without air filters to protect them from clogging up the plates. The
GUPEX® technology is used for recovering heat and energy from many
harsh, corrosive, wet, dusty and polluted industrial air and gas processes and environments, including:
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Zinc plating air heat recovery |
|
Combustion
exhaust gas heat exchanger |
|
Mining
air extract heaters |
|
Air-to-air heat recovery metallurgical processes |
|
Exhaust gas scrubber processes |
|
Exhaust
air heat recovery from galvanizing process |
|
Mine
ventilation supply air heaters |
|
Welding workshop air-to-air
extraction heat recovery |
|
Food processing
humid air/air heater system |
|
Heat
recovery - combustion
air preheater |
|
Paper Factory
ventilation pre-heater |
|
Moist
flue
gas HVAC exhaust air energy recovery |
|
Energy efficient
dehumidification |
|
Exhaust
gas purification (wet scrubbing) |
|
Spray drying
heat recovery |
|
Flue gas heat recovery |
TYPE
1 Air-to-air heat exchanger
Plate
module, fiberglass reinforced polyester
Type
G1 Air-to-air (gas to gas) heat exchanger
Air
plate module only, designed for connecting to, and building
into an air handling and air duct system. Low to medium
temperature.
KEY
TECHNICAL POINTS
Long Life:
GUPEX® air-to-air heat
exchanger is made of corrosion resistant composite
material (plastic) which gives it a long economic life with low
maintenance cost even under wet, corrosive or very hostile air conditions.
Large plate distance:
A 14mm gap between the heat
conductive plates enable handling of very dusty air
and particles without getting blocked. Air
filters are therefore normally not needed. If required, cleaning of plates is a very simple to
carry out by e.g. water flushing.
Low pressure drop:
A great advantage of the GUPEX® heat exchanger is very low pressure drop, only approx.
150 Pa excluding air chambers at nominal air volumes.
Low pressure drop reduces investment cost and saves energy.
| TECHNICAL
DATA |
| Model |
GUPEX
type 1 |
| Type |
Plate
type, air-to-air (gas-to-gas) crossflow |
| Material |
Glass
fibre reinforced composite |
| Width |
250-5000
mm - depending on air flow volume |
| Height |
1450
mm |
| Depth |
1450
mm |
| Plate
size |
1400x1400
mm |
| Thickness
of plates |
Approx
1 mm |
| Plate
distance |
Approx
15 mm |
| Pressure
drop |
150
Pa (at nominal air volume) |
TYPE
1C Air-to-air plate heat exchanger
Plate
module, with sandwich foam core polyester
walls
Type
G1 Air-to-air (gas to gas) heat exchanger
Air-to-air
plate module with polyester sandwich walls, thermally
insulated, designed for connecting to, and building into an
air handling system. low to medium temperature.
KEY
TECHNICAL POINTS
Long Life:
GUPEX® air-to-air heat
exchanger is made of corrosion resistant composite
material which gives it a long economic life with low
maintenance cost even under humid, dusty and very hostile air conditions.
Large plate distance:
A 14mm gap between the heat
conductive plates enable handling of very dusty air
and particles without getting blocked. Air
filters are therefore normally not needed. If required, cleaning of plates is a very simple to
carry out by e.g. water flushing.
Low pressure drop:
A great advantage of the GUPEX® heat exchanger is very low pressure drop, only approx.
150 Pa excluding air chambers at nominal air volumes.
Low pressure drop reduces investment cost and saves energy.
Casing
walls are thermally insulating, directing the energy exactly
where it is needed.
| TECHNICAL
DATA |
| Model |
GUPEX
type 1C |
| Type |
Plate
type, air-to-air (gas-to-gas) crossflow |
| Plate
Material |
Glass
fibre reinforced polyester |
| Casing
Material |
Polyester
sandwich core foam with laminated glassfibre layers on
both sides |
| Width |
250-5000
mm - depending on air flow volume |
| Height |
1500
mm |
| Depth |
1500
mm |
| Plate
size |
1400x1400
mm |
| Thickness
of plates |
Approx
1 mm |
| Plate
distance |
Approx
15 mm |
| Pressure
drop |
150
Pa (at nominal air volume) |
Type
1P Gas-to-gas in industrial processes
Vinylester
plate module in vinyl ester casing
Type
G1P Gas-to-gas (air-to-air) heat exchanger
Heat
exchanger plates and casing made of vinyl ester to operate
in and process gases up to 140°C. Can
be used for combustion
air preheating.
This
heat exchanger has solid laminated flanges on every opening
for connection into a gas and air process flow.
Low and medium temperature.
KEY
TECHNICAL POINTS
Long Life: GUPEX® air-to-air heat
exchanger is made of corrosion resistant composite
material which gives it a long economic life with low
maintenance cost even under very hostile (moist, condensing,
dusty) air conditions
Large plate distance:
A 14mm gap between the heat
conductive plates enable handling of very dusty air
and particles without getting blocked. Air
filters are therefore normally not needed. If required, cleaning of plates is a very simple to
carry out by e.g. water flushing.
Low pressure drop:
A great advantage of the GUPEX® heat exchanger is very low pressure drop, only approx.
150 Pa excluding air chambers at nominal air volumes.
Low pressure drop reduces investment cost and saves energy.
| TECHNICAL
DATA |
| Model |
GUPEX
type 1P |
| Type |
Plate
type, air-to-air (gas-to-gas) crossflow |
| Material |
Glass
fibre reinforced vinylester |
| Width |
250-5000
mm - depending on air flow volume |
| Height |
1600
mm (approx.) excluding flanges |
| Depth |
1600
mm (approx.) excluding flanges |
| Plate
size |
1400x1400
mm |
| Thickness
of plates |
Approx
1 mm |
| Plate
distance |
Approx
15 mm |
| Pressure
drop |
150
Pa (at nominal air volume) |
Type
1S Gas-to-gas heat exchanger for ventilation and
flue gas heat recovery
Polyester
plate module in galvanized steel casing
Type
G1S Gas-to-gas (air-to-air) heat exchanger
Air/air
heat
exchanger plates and casing made of polyester to operate
in wet, corrosive air flows with high concentration of
particles and dust.
The
heat exchanger has air openings made of solid galvanized steel
and with galvanized steel sheet side panels.
KEY
TECHNICAL POINTS
Long Life: GUPEX® air-to-air heat
exchanger is made of corrosion resistant composite
material which gives it a long economic life with low
maintenance cost even under very hostile air conditions.
Large plate distance:
A 14mm gap between the heat
conductive plates enable handling of very dusty air
and particles without getting blocked. Air
filters are therefore normally not needed. If required, cleaning of plates is a very simple to
carry out by e.g. water flushing.
Low pressure drop:
A great advantage of the GUPEX® heat exchanger is very low pressure drop, only approx.
150 Pa excluding air chambers at nominal air volumes.
Low pressure drop reduces investment cost and saves energy.
| TECHNICAL
DATA |
| Model |
GUPEX
type 1S |
| Type |
Plate
type, air-to-air (gas-to-gas), crossflow |
| Plate
Material |
Glass
fibre reinforced vinylester |
| Casing
Material |
Galvanized
steel |
| Width |
250-5000
mm - depending on air flow volume |
| Height |
1500
mm (approx.) excluding flanges |
| Depth |
1500
mm (approx.) excluding flanges |
| Plate
size |
1400x1400
mm |
| Thickness
of plates |
Approx
1 mm |
| Plate
distance |
Approx
15 mm |
| Pressure
drop |
150
Pa (at nominal air volume) |
TYPE
2 Diagonal air to air crossflow heat exchanger
Fiberglass reinforced polyester
plates - diagonal configuration 
Type
G2 Air to air (gas to gas) heat exchanger. Both
gas or air stream enters into a plenum which has tapered walls
defined by the diagonal walls of heat exchanger casing.
The air flows diagonally at an angle through the plates of the
heat exchanger.
Diagonal
plate heat exchangers may be advantageous in many plant
layouts to minimize the number of bends in the air ducts and
reduce the overall pressure drop and installation cost.
Low to medium temperature.
TECHNICAL POINTS
Long Life:
GUPEX® air-to-air heat
exchanger is made of corrosion resistant composite
material which gives it a long economic life with low
maintenance cost even under very hostile air conditions like
wet and condensing air containing particles and dust.
Large plate distance:
A 14mm gap between the heat
conductive plates enable handling of very dusty air
and particles without getting blocked. Air
filters are therefore normally not needed. If required, cleaning of plates is a very simple to
carry out by e.g. water flushing.
Low pressure drop:
A great advantage of the GUPEX® heat exchanger is very low pressure drop, only approx.
150 Pa excluding air chambers at nominal air volumes.
Low pressure drop reduces investment cost and saves energy.
| TECHNICAL
DATA |
| Model |
GUPEX
type 2 |
| Type |
Plate
type, air-to-air (gas-to-gas) crossflow |
| Material |
Glass
fibre reinforced polyester |
| Width |
250-5000
mm - depending on air flow volume |
| Height |
2000
mm |
| Depth |
2000
mm |
| Plate
size |
1400x1400
mm |
| Thickness
of plates |
Approx
1 mm |
| Plate
distance |
Approx
15 mm |
| Pressure
drop |
200
Pa (at nominal air volume) |
TYPE
3 Air-to-air heat exchanger with two plenums
Air
to air crossflow plate heat exchanger in fiberglass reinforced polyester
with top and lower plenum
GUPEX®
model 3 Air-to-air (gas to gas) heat exchanger.
Built for the most most extreme air atmosphere conditions, offering the advantages of low weight, high mechanical strength, high thermal insulation and high resistance to corrosive air and gas atmospheres. The surface finish of the air or gas heat transfer plates is smooth and easy to clean, making the heat exchanger practically maintenance free.
The
GUPEX®
3
type air heat exchanger body is supplied with plenums with large inspection doors
for easy inspection and cleaning. The heat exchanger casing is made of insulated
polyester sandwich material, limiting heat loss. The casing can also be made of other materials as an option.
Any
moisture condensing inside can automatically be drained away from a dedicated
drain point at the lowest point in the lower plenum.
GUPEX®
type 3 air to air heat exchanger variant without
top plenum
Where
ducting is not required and the air is being emitted straight
to the atmosphere the
GUPEX® type 3 air/air heat exchanger can be
built without a top plenum. This is less expensive and
reduces pressure drop.
KEY
TECHNICAL POINTS
Long Life:
GUPEX® air-to-air heat
exchanger is made of corrosion resistant composite
material which gives it a long economic life with low
maintenance cost even under very hostile air conditions.
Large plate distance:
A 14mm gap between the heat
conductive plates enable handling of very dusty air
and particles without getting blocked. Air
filters are therefore normally not needed. If required, cleaning of plates is a very simple to
carry out by e.g. water flushing.
Low pressure drop:
A great advantage of the GUPEX® heat exchanger is very low pressure drop, only approx.
150 Pa excluding air chambers at nominal air volumes.
Low pressure drop reduces investment cost and saves energy.
| TECHNICAL
DATA |
| Model |
GUPEX
type 3 |
| Type |
Plate
type, air-to-air (gas-to-gas) crossflow |
| Material |
Glass
fibre reinforced polyester |
| Width |
250-5000
mm - depending on air flow volume |
| Height |
2900
mm |
| Depth |
1450
mm |
| Plate
size |
1400x1400
mm |
| Thickness
of plates |
Approx
1 mm |
| Plate
distance |
Approx
15 mm |
| Pressure
drop |
150
Pa (at nominal air volume) |
Double
and triple gas-to-gas heat exchangers
Double
air-to-air plate heat exchangers for extra heat recovery
Double
configurations are chosen for when a higher degree of heat
recovery is desired. or when there is a big difference between
the hot and cold air flow volumes. The overall thermal efficiency is
higher when the hot and cold air is exchanged twice (or even
three times).
With
the GUPEX® air-to-air heat
exchanger design you are totally flexible with regards to the
positioning of the air and gas ducts.
KEY
TECHNICAL POINTS
Long Life: GUPEX® air-to-air heat
exchanger is made of corrosion resistant composite
material which gives it a long economic life with low
maintenance cost even under very hostile air conditions.
Large plate distance:
A 14mm gap between the heat
conductive plates enable handling of very dusty air
and particles without getting blocked. Air
filters are therefore normally not needed. If required, cleaning of plates is a very simple to
carry out by e.g. water flushing.
Low pressure drop:
A great advantage of the GUPEX® heat exchanger is very low pressure drop, only approx.
150 Pa at nominal air volumes excluding the air plenums.
| TECHNICAL
DATA |
| Model |
Based
on GUPEX
type 2 or 3 |
| Type |
Plate
type, crossflow, air-to-air (gas-to-gas) |
| Material |
Glass
fiber reinforced vinyl ester |
| Casing
Material |
Composite
sandwich core construction |
| Width |
to
fit the required design |
| Height |
to
fit the required design |
| Depth |
to
fit the required design |
| Plate
size |
1400x1400
mm |
| Thickness
of plates |
Approx
1 mm |
| Plate
distance |
Approx
15 mm |
| Pressure
drop |
150Pa
through each plate module;
overall figure individually
calculated |
GUPEX
gas-to-gas plate heat exchangers in gas scrubbing processes
Crossflow
type fiberglass reinforced polyester air air heat exchanger
 The GUPEX®
gas to gas plate heat exchangers are designed for medium-range
temperature areas of flue gasses e.g coal fired power station
processes. The air/air (gas gas) plate heat exchanger is a
viable alternative to the rotating heat exchangers. And with
no moving parts and with its excellent chemical resistance the
plate heat exchanger improves efficiency and pay-back time and
reduce the cost.
Untreated
flue gas enters at 100 - 150°C and is cooled down to 70 - 100°C,
which is below the acid dew point. The clean gas enters
saturated with moisture at 45 - 50°C and is re-heated to
typically 75 - 90°C to give the outlet gas the buoyancy
required to lift it through the chimney. The flue gas at this
stage typically contain fly ash, condensing acid, water with a
high chlorine content, unbleached limestone, remnants of SO2
and SO3 etc. The use of a corrosion resistant high
temperature resistant specialty composite plate heat exchanger can
remove the need for large rotating heat exchangers which
typically are made of coated or enameled steel.
GUPEX®
gas-to-gas plate heat exchanger in FGD process
Since
the GUPEX® gas to gas plate heat exchanger has no
moving parts there will be no air leakage caused by the
design of the heat exchanger, so no cross contamination of gas
flows will occur.
The GUPEX®
gas to gas plate heat exchangers are scaleable to suit air and
gas volumes from flue gasses in coal fired power stations (up
to more than one million m³ per hour, or more than 1
million CFM).
KEY
TECHNICAL POINTS
Long Life:
GUPEX® air-to-air heat
exchanger is made of corrosion resistant composite
material which gives it a long economic life with low
maintenance cost even under very wet and hostile air conditions.
Large plate distance:
A 14mm gap between the heat
conductive plates enable handling of very dusty air
and particles without getting blocked. Air
filters are therefore normally not needed. If required, cleaning of plates is a very simple to
carry out by e.g. water flushing.
Low pressure drop:
A great advantage of the GUPEX® heat exchanger is very low pressure drop, only approx.
150 Pa excluding air chambers at nominal air volumes.
Low pressure drop reduces investment cost and saves energy.
Pre-heating
of the supply air to drying processes
Hot exhaust air to pre-heat
combustion (burner) air
Most
drying processes use heat and air to remove moisture from a
process.
The
moisture is absorbed by the hot air.
The
hot and moist (and extremely energy-rich!) exhaust air is
removed through exhaust gas ducts and chimneys and out into
the atmosphere.
Very
efficient drying indeed!
Or
is it?
Many
companies are blowing tens of thousands of kWh of energy per
year straight into the air.
For
example recovery of 100 kW of heat from exhaust air operating
for 6000 hours per year will with an energy price of say,
$0.02 per kWh, be equivalent to a loss of $12,000 per year.
This
is a totally preventable loss. With the
installation of a GUPEX® exhaust gas-to-gas heat
exchanger the cold supply air to the combustion process will be pre-heated
directly by the outgoing exhaust gas. And when the cold
supply air is pre-heated this way, less energy is required to
heat it further up the air to the required drying process.
KEY
TECHNICAL POINTS
Long Life:
GUPEX® air-to-air heat
exchanger is made of corrosion resistant composite
material which gives it a long economic life with low
maintenance cost even under very hostile medium range
temperature air conditions.
Large plate distance:
A 14mm gap between the heat
conductive plates enable handling of very dusty air
and particles without getting blocked. Air
filters are therefore normally not needed. If required, cleaning of plates is a very simple to
carry out by e.g. water flushing.
Low pressure drop:
A great advantage of the GUPEX® heat exchanger is very low pressure drop, only approx.
150 Pa excluding air chambers at nominal air volumes.
Low pressure drop reduces investment cost and saves energy.
Underground
mine air pre-heating: Heating the Supply Air to Deep Mine Ventilation
Shafts
Frost-free
mines: Air-to-air plate heat exchangers as pre-heaters of supply air to
underground mine ventilation system.
 In
arctic and other cold regions of the world (apart from deep
mines where the mining horizon is above the permafrost) the supply air
through the mines must be pre-heated
prior to entry via the shaft,
ventilation raise or adit during the frosty winter periods.
Air heating
is typically done with large
heater units or blowers burning propane, diesel, natural gas or oil, all
of which consume
large amounts of energy and add CO2 to the atmosphere. In addition, air-to-liquid fluid heat exchangers
are sometimes used to recover some of the heat from the mine extract air but these installations have a very low inherent thermal
efficiency since the exchange air-to-liquid has to take
place twice.
The GUPEX®
air-to-air crossflow plate heat exchanger, instead of a
conventional mine heater, is a very
cost-effective method of pre-heating the supply air to the
mine shaft. The incoming cold supply air is heated directly by the warm
and moist mine extract air which contains vast amount of energy
(which
otherwise would be wasted) in a large plate heat
exchanger with no moving parts.
The
heat exchanger unit is built as part of the mine ventilation system
to the required air flow,
which can be up to several million m³/h (1m+ cfm),
constructed with a housing connected to the air ducts and fan
units. Thousands of kW heat power is constantly transferred from the
extract air to the cold supply air, saving large amounts of
alternative energy used by combustion heater units.
The purpose of
a mine ventilation shaft heater system is to raise the temperature of the mine intake air entering the decline portal to 2°C during the winter months. The basis for
using a mine heater for keeping the air above freezing is to:
- Prevent the mine services from freezing including compressed air (condensation), mine water and water
discharge;
- Keep decline roads
and stopes free from ice;
- Improve ergonomics and reduce cold related stress.
Gupex supply complete mine air
pre-heater systems with heat
exchanger unit, housing, ductwork, extract and supply air fan
units, engineering and commissioning.
These
large GUPEX® heat exchangers are made of corrosion resistant material which
withstand corrosion caused by condensing extracted mine air. The heat exchanger
plates are designed to give low pressure drop to minimize
energy consumption of the fan units.
Email
for more details
Maintenance
of GUPEX air-to-air heat exchanger
Rugged
Design
 The glass fibre reinforced plastic plates are so robust and
mechanically strong that personnel can walk on the edges on top of the plates whilst inspecting, jet or steam spraying, scrubbing and washing and hosing the plates according to requirements.
The GUPEX plates are made of solid GRP which resists most corrosive and erosive air and gas flows. GUPEX therefore provide many years of operation where regular equipment replacements are the norm.
When the the heat exchanger housing is included in our supply we provide suitable access openings for inspection maintenance and cleaning of the the plate section.
A 14mm gap between the heat
conductive plates enable handling of very dusty air
and particles without getting blocked. Air
filters are therefore normally not needed. If required, cleaning of plates is a very simple to
carry out by e.g. water flushing.
Email
for more details
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