Claudio Bortolin EPADOPO Rack configuration 2 3x ATCA shelves 2x CERN standard Schroff unit 1x ASIS 3x 2U heat exchangers with max cooling capacity of 79 kW each Water chiller max cooling capacity ID: 935133
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Slide1
Update on ATCA cooling and noise reduction in ATLAS
Claudio Bortolin EP-ADO-PO
Slide2Rack configuration
2
3x ATCA shelves– 2x CERN standard Schroff unit + 1x ASIS
3x 2U heat exchangers with max. cooling capacity of
7.9 kW
each
Water chiller: max. cooling capacity
25kW
3x different set of load blades (LB):14x ASIS LB, max power dissipation: 600W only front14x New type Comtel LB, max power dissipation: 800W only front 14x Old type Comtel LB, max power dissipation: 50W RTM+ 300W front
ASIS LB (6 T sensors)
High air resistance
New type Comtel LB (no T readout)
Old type Comtel LB (6 T sensors)
Low air resistance
Important notes
: 1) The power dissipation on the load blades is spread equally on the whole board2) To increase the life time of the boards in the ATCA shelves, maximum target temperature is 50C.
Water piping are insulated for cold water tests
Slide3Hardware used and cooling principal
2x CERN standard Schroff ATCA crate – each equipped with 2
fan trays
(1 top and 1 bottom)
Turbine– 4U
ATCA 3 – 14U
ATCA 1 – 14U
Air Deflector – 2U
1 Heat exchanger -2U
ATCA 2 – 14U
1 Heat exchanger -2U
Power supply 1 – 3U
63U
Power supply 2 – 3U
free–2U
1 Heat exchanger -2U
Power supply 3 – 1U
ATCA 3 – 14U
ATCA 2 – 14U
ATCA 1 – 14U
1 HX -2U
1 HX -2U
1 HX -2U
Air Deflector – 2U
PS2 – 3U
PS1 – 3U
PS3 – 1U
Turbine– 4U
free–2U
“Cooling tower”
1x
NOT
CERN standard ASIS ATCA crate – equipped with 3
fan trays
on the top and one on the bottom
Front view
Side view
3
Different LB
sets => different cooling efficiency:
ASIS LB
= a lot of heat sinks => higher air resistance =>
better cooling efficiency
Old Comtel LB
= no heat sinks => low air resistance =>
high temperature peaks on axis of the fans
s13
s11
s9
s7
s5
s3
s1
s2
s4
s6
s8
s10
s12
s14
Airflow indication in the rack =>
Slide4Vertical cooling configuration
4
Shelves + heat exchangers
(noise source)
Air gaps (32mm wide)
Front door
Cooling
back door
Insulation material 28mm thick
Sec. A-A
Turbine– 4U
ATCA 3 – 14U
ATCA 1 – 14U
Air Deflector – 2U
1 Heat exchanger -2U
ATCA 2 – 14U
1 Heat exchanger -2U
Power supply 1 – 3U
63U
Power supply 2 – 3U
free–2U
1 Heat exchanger -2U
Power supply 3 – 1U
A
A
Empty space for pipes and cables.
Air gap
Slide5ATLAS USA15 Counting rooms dimensions
3.44 m
1.22 m
4.25 m
1.2 m
Side view of the USA15 Counting rooms level 1&2
In both counting rooms there is AC system mounted under the ceiling, the lowest piping is at the height of 3.01m in the counting room level 1 and 2.63
m
in level 2
.
Since
the
walls
in the USA15
Cavern
are
arched
the
dimensions
may
differ
depending
on the
height
of the
measurement
.
USA15
Counting
rooms
level
1&2
Volume to be considered for noise confinement
Slide6ATLAS USA15 Counting rooms dimensions
3.44 m
1.22 m
4.25 m
1.2 m
Side view of the USA15 Counting rooms level 1&2
In both counting rooms there is AC system mounted under the ceiling, the lowest piping is at the height of 3.01m in the counting room level 1 and 2.63
m
in level 2
.
Since
the
walls
in the USA15
Cavern
are
arched
the
dimensions
may
differ
depending
on the
height
of the
measurement
.
USA15
Counting
rooms
level
1&2
Volume to insulate with soundproofing panels
Slide7Level 1
Concrete wall covered by aluminium wall containing water
Concrete wall
Concrete wall
1900
370
750
310
400
2300
2000
700
Concrete wall
Sandwich panels
Sandwich panels
Sandwich panels
Sandwich panels
Sandwich panels
850
350
250
180
Concrete wall
Concrete wall
250
300
100
150
100
400
250
29 future ATCA racks (63U)
Rack dimension
Width = 60
Depth = 99.5
Height = 292.4
Height room = 430 cm
Non ATCA Rack dimension (52U)
Width = 60
Depth = 99.5
Height = 243.5
540
120
110
90
90
90
90
90
90
90
90
210
120
120
120
120
120
90
185
140
130
145
115
85
145
115
115
175
110
200
200
100
200
90
320
100
100
195
480
200
100
100
190
480
Unit = cm
Laetitia BARDO – 02.08.2019
Slide8Level 2
Concrete wall
Concrete wall
Concrete wall
1900
2300
800
400
Height room = 350 cm
200
1200
Sandwich panels
Sandwich panels
500
250
300
93
196
145
65
100
200
100
200
100
175
120
100
90
140
60
135
135
135
370
370
130
130
180
180
145
180
110
230
230
270
180
220
80
290
215
425
290
215
195
195
210
15
15
205
Concrete wall covered by aluminium wall containing water
Unit = cm
33 ATCA racks = 63 U
Rack dimension
Width = 60
Depth = 99.5
Height = 292.4
Slide9Level
1 - Ventilation structure
All light blue blocks (on the plan) are part of the ventilation system (see picture)
Width = 29 cm
Height = 130 cm
Length = 130 cm
Material = Aluminium
Slide10Level 2 - Ventilation structure
All light blue blocks (on the plan) are part of the ventilation system (see picture)Width = 29 cmHeight = 130 cm
Length = 130 cm
Material = Aluminium
Slide11Width = 30 cmHeight = room heightLength = room length
Aluminium wall with
water
Slide12Ceiling
Level 1
Level 2