Power
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Power |
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Muon power consumption page.htm
Outer tracker power consumption page.htm
Rich1&2 power consumption page.htm
Velo power consumption page.htm
Veto power consumption page.htm
An EDMS document describing the power needs for LHCb is available here: https://edms.cern.ch/cedar/plsql/doc.info?document_id=473770&version=last
Due to harmonics problems with the 1500 PCs of the PC farm in D1 and partially in D2, it has been decided to make a separation between the PCs and the front-end electronics by installing two different transformers.
| Transformer 1: | All numbers are given in kW | |||
| for the PC farm in D1 and D2 | ||||
| Item | In cavern (detector area) | Counting house area | Remarks | |
| Barracks D1 | ||||
| Max. per PCs Rack | 10 | kW | The maximum power that can be cooled for each rack has been considered. | |
| Max. number of racks | 50 | |||
| In D1 barrack (PCs farm) | 500 | |||
| Barrack D2 | ||||
| Max. per PCs Rack | 10 | kW | ||
| Max. number of PC racks | 10 | |||
| Total for futur extension of PC farm | 100 | kW | For futur extension | |
| Switches, ECS, SFC (3 rack rows) | 100 | kW | ||
| In D2 barrack (ECS, Network) | 200 | |||
| TOTAL | 0 | 700 | kW |
| Transformer 2: | All numbers are given in kW | |||
| for the F-E electronics in D3 and in the cavern (+ additional sub-systems) | ||||
| Item | In cavern (detector area) | Counting house area | Remarks | |
| Barracks A2 and B3 | ||||
| Calorimeter | 0 | 45 | LVPS for "in-cavern" electronics are installed in the counting house area | |
| Inner Tracker | 0 | 14 | " " | |
| Trigger Tracker | 0 | 17 | " " | |
| Muon | 0 | 44 | " " | |
| OT | 0 | 30 | " " | |
| Rich 1&2 | 0 | 14 | " " | |
| VELO | 0 | 22 | " " | |
| VETO | 0 | 3 | " " | |
| Total | 0 | 188 | " " | |
| Safety factor (errors) | 1.5 | 1.5 | ||
| Total for the detectors | 0 | 282 | ||
| 30% safety margin for future extension | 30% | 30% | ||
| Total for the detectors with margin | 0 | 366.6 | ||
| DSS (1 rack) | 1 | |||
| TFC + L0DU (3 racks) | 20 | |||
| In barracks A2 and B3 (detectors) | 387.6 | |||
| Barrack D2 | ||||
| DSS (1 rack) | 1 | |||
| Spare for futur detectors racks (10kW per rack) | 90 | For futur extension | ||
| In D2 barrack | 91 | |||
| General | ||||
| Detector cooling racks (8*15kW) | 120 | |||
| Gas (7 racks on platform near counting house, 4kW each) | 28 | |||
| Magnet control MCS + MSS | 6 | |||
| Sniffer system racks | 10 | |||
| Cooling on the detector | 70 | |||
| Pumps (for the VELO) | 10 | |||
| TOTAL | 10 | 713 | = | 721 kW |
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| This page was last modified by
VB on
May 19, 2004.This
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