500149_e_Prospekt Klima-_72

Transcription

22.9.2005
10:44 Uhr
Seite 1
Aluminium Enclosure Systems
AIR-CONDITIONED CABINET
ACS (patented)
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Seite 2
ACS
Thermal conduction through heat dissipation
Construction
The framework of the ACS cabinet is composed of robust distortion proof hollow alu extrusures.
The extrusures are fitted with symetrical fixing runners for the fitting of sliding nuts, giving a wide
and varied construction range.
The bridth and depth connections over various levels provide a universal construction range.
The cabinet has a closed top and bottom (inner circulation). The doors, side- and back panels, are all
double panelled. Added strengthened extrusures ensures a high mechanical stability.
Finishing treatment
Standard coating:
Pre-treatment:
Coating:
RAL 7032
Chromated to DIN 50939
powder coated
Non standard coating:
Pre-treatment on extrusure:
Pre-treatment on panel sheets:
RAL to order
Chromated to DIN 50939
Cleaned with Meta-Clean HP hydrocarbon compound specially for
aluminium, biologically decomposed
60 – 80 Micron
Coating thickness:
This treatment proceedure is necessary on aluminium used outside and guarantees long term weather
protection.
Testing
The ACS complies and certifies to EN 50298
RF Shielding provided to EN 61000
Earthquake, shock, vibration, transportation ETS 300019
IP 55 dust and waterproof to EN 60529
subject to alteration
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Standard version 1-Hinged door
Standard version 2-Hinged doors
sectional view B – B
sectional view A – A
measurements in mm
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19”/ ETSI Swivel frame
View without door
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Seite 4
19”/ ETSI Fixed extrusure
View without door
sectional view A – A
sectional view B – B
Swivel frame 180 ° pivotable
Double fixed extrusure
sectional view plinth
standard
option
19” / ETSI Swivel frame
Table 1
measurements in mm
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ACS
Einflussfaktoren
Influence
factors
Thermal
physical characteristics
airLuft
Thermophysikalische
Charakteristikof
von
Air
a eine
mixture
of gases, which
have physical thermal
characteristics that
change
due to
pressure,
Luftisist
Gasmischung
mit thermophysikalischen
Charakteristiken,
die beim
Ändern
von
Druck
temperature
and humidity.
bzw. Förderhöhe,
Temperatur und Feuchtigkeit variieren.
3 3, das heisst, dass
Die air
Dichte
vonofLuft
20 °C50und
50% relativer
Feuchtigkeit
beträgt
kg/m
An
density
20 bei
% with
% relativ
humidity,
is equivalent
to 1,21,2
kg/m
,
3
3 Luft 1,2 kg1wiegt.
in
m of Die
air weighs
1,2 kg.
pressureArbeitsbereich
in a normal working
area can
then be considered
Dichte kann
beiThe
normalem
als konstanter
Wert
1 motherwords,
as
a
constant
value.
betrachtet werden.
The
specific heat
capacity of dry air
-40 °C is equivalent
to°C
0,238
kcal/kg
°C,kcal/kg
and at°C,
60bei
°C 60
to 0,244
kcal/kg °C.
Die spezifische
Wärmekapazität
vonattrockener
Luft bei -40
beträgt
0,238
°C
The
constant
value
of 0,244
kcal/kg
°C. TheWert
constant
value
of 0,24
°Cfür
applies
alsoLuft.
to humid air.
beträgt
sie 0,244
kcal/kg
°C. Der
konstante
von 0,24
kcal/kg
°C kcal/kg
gilt auch
feuchte
In
otherwords
practice
can zum
be said),
to heatoder
or cool
1 kg ofvon
air1inkgone
hour,
kcal
would
be needed,
Praktisch
kann(in
man
sagen,itdass
erwärmen
abkühlen
Luft
um 0,24
1 °C in
einer
Stunde,
so
long
there were
no change
in keine
conditions,
(humidity, condensation,
0,24
kcalasbenötigt
werden,
solange
Zustandsänderungen
auftretenetc.).
(Verdampfung,
3 °C
We’re
working usw.)
with aWir
rounded
off mit
value
of 0,29
kcal/m3 °C.Wert
Reached
through
the equivalent:
Kondensation
arbeiten
dem
aufgerundeten
0,29 kcal/m
Density
x specific thermal
capacity
= 1,2 x Wärmekapazität
0,24 = 0,29.
zusammengesetzt
aus: Dichte
x spezifische
= 1,2 x 0,24 = 0,29.
Passive
thermal heating
/ Convection
Passive Entwärmung
/ Konvektion
Example
Beispiel
• Kühlleistung
•Cooling
performance
•
max.
Aussentemperatur
• max. outside temp.
• max.
•
max. Shelter-Innentemperatur
inner cabinet temp.
•
Shelter-Abmessungen
• Cabinet dimensions
• Shelter-Plazierung
•
Cabinet location
• Shelter-Material
•
Cabinet construction
850 Watt
(Verlustleistung
iminKlima-Shelter)
850
Watt (Performance
loss
cabinet)
30
°C
30 °C
50 °C
50
°C
Breite
Tiefe
0,6m
Bridth 11m,
m, Höhe
height2m,
2 m,
depth
0,6 m
Breite
1m
x
2m
an
der
Wand
(sonst keine Hindernisse)
Bridth 1 m x 2 m against the wall
Aluminium
Alu
P Konvektion
die durch
die
Shelterwände
die Umgebung abgegeben wird)
P
Convection (Wärmeleistung,
(Heat performance,
emitted
through
the sidean
panels)
2
. = A x ΔT x k
k
Pkonv
2 (für Aluminium)
P
conv. = A x Δ T x k
k == 55WW/ m
/ m°C
°C (for Alu)
22 x 20 °C x 5W / m2 °C
P
konv.
=
5m
Δ
T
=
T
Schrank
2 = 500 Watt
Pconv. = 5 m x 20 °C x 5 W/m °C = 500 Watt
Δ T = T cabinet––TTaussen
outside
A
A == Shelter-Oberfläche
Cabinet surface area
Effektive cooling
Kühlleistung
Effective
performance
Peff.
eff. =
conv.
= Pv ––PPkonv.
P
eff. =
Watt --500
500Watt
Watt==
350
Watt
Peff.
= 850
850 Watt
350
Watt
loss
PPvv =
= Performance
Verlustleistung
Diagramm
Diagram
Given
heat performance
abgegebene
Wärmeleistung
Cabinet
surface area (m2(m
) 2)
freie Schrankoberfläche
Wärmeverlust
durch die
Thermal loss through
theShelter-Wände
cabinet panels
Im nebenstehenden
Diagramm
kann
man
The
thermal performance
can be
read
diegraphical
Wärmeleistung
(Konvektion)
graphisch
in
form, from
the adjacent
ablesen (mit k = 5 für Aluminium).
diagram.
Temp. difference between
inside
and
outside
Temperaturdifferenz
zwischenthe
Innenund
Aussenseite
subject
to alteration
Änderungen
vorbehalten
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Seite 6
ACS
Principle function
The climate cabinet functions similar to an air-air heat exchanger. By this we mean an outer and inner air
circulation. The climate cabinet has the function, to transfer heat between two medias with various
temperatures (the cooler media carries the heat up, and the warmer media, down).
The climate cabinet is built on an air-air opposing principle. That means that the two air flows exchange
direction in the cabinet thermal flow.
The main advantage over air-vents, is that the two air flows do not mix.
The heat, in relation to the cooling performance of the climate cabinet is dependant on:
• The exchange area of the cabinet
• Type of medien (by us always air)
• Air density inside and outside
• Temperature difference between inside and outside the cabinet
Mostly the values for the cabinet are given, only the air temperatures inside and outside are to be given.
The cooling performance changes, when the temperature differences changes. By constant temperature
differences, the cooling performance doesn’t change. The cooling performance (in Watt) and the temperature
difference (pro grad Kelvin, or °C), between outside and inside air can be exchanged and printed out as a
specific cooling performance.
Specific cooling performance x Temperature difference = cooling performance
Pspez. x ΔT = Pv
(W/K x °C = W)
Climate cabinet example
Following values are known:
Resulting in:
– Specific cooling performance
– max. permitted temp.
– max. forseen outside temp.
50 W/K
45 °C
35 °C
Cooling performance = 50 x (45–35) = 500 W
The climate cabinet can retain a temperature of 45 °C with a max. ambient temperature of 35 °C.
By a performance loss of 500 W or less in the cabinet, the max. temperature in the cabinet can be guaranteed.
The climate cabinet volume decides the number of fans to be fitted in the cabinets top spacing. This generates
a vacuum flow in the top compartment of the cabinet which meets the air-flow from the bottom hollow
chambers at ca. 3,6 m/s. Through the controlled inflow speed in the chambers of the doors, side- and back
panels is an optimal air quantity in the outside circulation guaranteed, independant of the size of the cabinet.
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Seite 7
ACS
Perfect design
Climate cabinet closed with swivel grip handle and locking cylinder
Special plinth for the application to a concrete grounding
With removable lifting rings, ensuring an easy transport and placing of the cabinet
7
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Seite 8
ACS
Perfect enclosure technique
Version with sidedoor entry to mains field, with separate cylinder lock
Double winged front with telescope door-restrainer
With outer enviromental seal, and inner R.F.-shielding
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Seite 9
ACS
Made to measure
Outer hanging front with inner securing
Stainless steel, pull out or fixed battery compartment (max. weight 220 kg)
19”/ ETSI swivel frame (180 ° pivotable)
19”/ ETSI fixed extrusure
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Seite 10
ACS
High efficiency
Inner cooling body increases the wetting area.
The heat flow from inside over the cooling body
(convection) in the hollow chambers is optimal and
the heat effect on the outer panel surface is low.
The hollow chamber (double panel) on the doors,
side- and back panels enable a high air-flow to
cool the inner panels. The air will then be directed
over the cooling body, between the mid and top
panels until released into the open.
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Seite 11
ACS
Individual installation
Lockable cable guide
Removable service shelf
Door retrainer
Fixing technique to customers wish
19” / ETSI Alu-swivel frame 180 °
pivotable with inserted thread
ledges M6 and roller bearing.
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Seite 12
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500149_e_Prospekt Klima-_72

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