09-092 al-ko prospekt energierückg 6s eng-01
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8/9/2019 09-092 AL-KO Prospekt Energierückg 6S Eng-01
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HIGH PERFORMANCE-RUN AROUND COIL SYSTEMENERGY RECOVERY
AIR-HANDLING-UNITS
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Supporting frame for Hydraulic components Heat recovery system according to VDI 2071
Benets of energy recovery
The heat capacity transferred to the
outside air is not generated afresh but
recovered through heat recovery from
the extract air. The use of heat recovery
units in air conditioning systems results
in a higher capital investment but
results in much lower operation costs.
A feasibility study determines whether
the installation of a heat recovery unit
is economic.
Reasons for using a heat
recovery system:
I Capacity reduction for heat generation.
I Reduction of annual heating energy
consumption.
I Capacity reduction for cooling.
This means a scaling down and
saving of investment in heating coils,
pipelines, pumps, cooling systems,
refrigeration plant, cooling towers
and cooling coils.
I Reduction of the annual cooling
energy consumption, thus lower
operating costs.
I Reduction in environmental pollution.
The most important heat
recovery systems
Recuperators
The hot and cold airows are directed
along common interfaces through which
the heat is transferred.
Regenerators
Heat and possibly humidity exchange
via contact surfaces. Hot and cold air
ows physically separated through the
heating wheel. This absorbs the heat in
the extract air and passes it to the
supply air.
Run around coil systems
The heat recovery unit is made up of
several heat exchangers. The energy
is transferred indirectly using heattransfer medium via the interface
between the hot air and the heat
transfer medium and the interfaces
between the energy heat transfer
medium and the cold air.
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Run around Coil Systems
AL-KO HEHR (High efcieny Heat recovery)
The AL-KO run around coil system
achieves the highest possible heat
recovery values considering construc-
tional criteria, like hydraulic circuit,
geometry and heat flow capacity.
The capacity of the system can be
adjusted to high demands for optimal
achievement of economic criteria.
In the run around coil system the
heat exchange elements for cooling
are integrated into the extract airflow
and for heating in the outside airflow.
A pipe system connects the two coils
and serves as a energy transport
medium. The circulating water-glycol
fluid removes the heat energy from the
hot extract air and transfers it to the
cold outside air.
Heat exchangers with special
water conduit circuit
Air ow ratio outside / exhaust
Air velocity on corrugated exchanger surface
Temperature efciency outside air
Inlet, fresh air
Outlet, fresh air
Inlet, exhaust air
Outlet, exhaust air
Glycol content, Antifrogen N
AL-KO Standard system design
1 : 1
2 m/s
70 %
-12 °C / 85 % r. F.
11,8 °C / 13,2 % r. F.
22 °C / 10 % r. F.
-1,8 °C / 50 % r. F.
25 %
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System description
Operation of the AL-KO
run around coil system
I Use of high performance heat ex-
changers in a multiple countercur-
rent circuit. This achieves high
annual utilisation ratios of 80%.
I Each heat exchanger has only one
mode of air flowing through (fresh
or extract air) so that germs and
contamination cannot be transferred.
I The system is used during the winter
period to pre-heat the fresh air and
in the summer to pre-cool the fresh
air through adiabatic cooling of the
extract air.
I Because of humidification of the ex-
tract air during summer period the air
is cooled and the cooling transferredto the supply air. Humidity cannot be
transferred between the airflows.
Because the exhaust air temperature
is raised in the exhaust air heat ex-
changer, it leaves the building with-
out moisture.
I Depending on the type of humidifier
(evaporation humidifier, high pressure
nebuliser, air washer) the humidifica-
tion is able to use service water,
demineralized or adul terate water.
I The AL-KO outside air heater can be
divided in accordance with VDI 6022.
The defroster with wide fin spacing,
installed before the filter, raises the
outside air temperature sufficiently to
avoid frost formation on the filter
medium and thus ensures compliance
with the relative humidity required byVDI 6022.
Exhaust air
Outdoor air
Extract air
Supply air
Hybrid humidifier
DVE
Leistungsregelungprimärseitig
PWW 50/30
HydraulicModul
PWW 50/30
SN
MID
ZL
VE
PTH
M
M
M
5 2 4 3 2
I For dehumidifying an additional heat
recovery system exchanger is installed
after the dehumidifying cooler. During
dehumidifying operation the energy
medium will first be directed over the
heat recovery reheater to raise the
supply air temperature. The thereby
reduced water temperature considera-
bly reduces the outlet temperature
at the heat recovery coil. This system
circuit saves approximately 20 % cooling
capacity.
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HEHR run around coil system design
I The division in to separate self-
sufficient systems ensures a very high
operational safety and optimal energy
transfer. The heat transfer medium
impinges directly on the heater and
cooler. This design removes the need
for an intermediate medium and additi-
onal medium pumps.
I All hydraulic components needed
for the operation are contained on
a supporting frame.
I Cooler and heater are tubed and
connected in accordance with proven
layouts.
I This energy transfer concept is installed
at the factory and piped together on site
by customer installers. There is no re-
quirement for factory specialists for this
system. The same applies for servicingand maintenance. All heat exchangers
can be high-pressure cleaned up to the
core.
I The excellent performance values of
the AL-KO-systems result in a short
amortisation period.
Heat exchangers:
The standardised AL-KO heat exchangers
consist as standard of copper tubes with
expanded aluminium fins and stainless
steel frame. For increased requirements
the multifarious material combinations
are further enhanced by high quality coa-
tings from two component epoxy resin
or polyamide. The heat exchangers are
designed around the principle of multiple
countercurrents. The heat exchangers
can be completely drained and vented
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AL-KO THERM GmbH
Hauptstraße 248-250
89343 Jettingen-Scheppach
Phone (+49) 8225 / 39-0Fax (+49) 8225 / 39-113
E-mail [email protected]
www.al-ko.com
AL-KO Lufttechnik – Auszug aus der Referenzliste
Projekt
WRG: Wärmerückgewinnung ERG: Energierückgewinnung (Wärme / Kälte etc.) SN: Sommernachwärmung bei Entfeuchtung über ERG
Verbund: Mehrere Lüftungsgeräte zu einem Anlagenverbund zusammengeschlossen
ZUL ges.
m3 / h
ABL ges.
m3 / h
Anzahl
Geräte
WRG ERG SN Ver-
bund-
anlage
Adiabate
Abluft-
befeuch-
tung
Hybride
Abluft-
befeuch-
tung
Aircabin Laupheim 382 000 382 000 6 + 6 X X
Bio Zentrum Köln 264 000 220 800 6 + 9 X X
Böhringer Ingelheim 27 500 27 500 1 + 1 X
Creavis Marl I. BA 58 300 51 450 5 + 4 X X X
Creavis Marl II. BA 59 500 45 500 6 + 5 X X
Diakonie Bremen 38 000 38 000 1 + 3 X X X
Ehrmann Moskau 50 000 50 000 1 + 1 X
FHG IZI Labore Leipzig 9 000 9 000 2 + 2 X X
Franziskus Stif t Lohne 35 000 35 000 1 + 1 X
Fraunhofer Erlangen II. BA 52 650 52 650 6 + 6 X
Fraunhofer ITEM Hannover 83 000 71 700 1 + 2 X X X
Hbf Dresden 43 150 44 120 3 + 3 X
Heiligenhafen 21 080 21 080 2 + 2 X
IFOK Rostock 64 000 64 000 4 + 4 XJogu Mainz Hörsäle 26 315 19 425 1 + 1 X
KH Siloah 10 600 10 850 1 + 1 X
Maritim Hotel Berlin 10 600 10 600 1 + 1 X
Mehrzweckhalle Heilgenhafen 10 000 10 000 X
PTB Braunschweig 30 000 30 000 1 + 1 X X
Reha Kirchberg Luxembourg 129 200 129 200 9 + 9 X
Residenztheater München 9 000 8 500 1 + 2 X X
Rietberg Museum Schweiz 20 000 1 X
Schülke & Mayr 35 000 38 000 1 + 1 X X
Technologiepark Warnemünde 29 275 29 590 1 + 1 X
TIH Hannover 23 000 23 000 1 + 1 X X
Uni Köln Wirtschaf tsgebäude 254 000 250 000 2 + 7 X X