A Mixed Reality System for Enabling Collocated After Action Review
RPC Temperature Studies A. Cimmino. Temperature Studies 310 temperature sensors are collocated...
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Transcript of RPC Temperature Studies A. Cimmino. Temperature Studies 310 temperature sensors are collocated...
RPC Temperature Studies
A. Cimmino
Temperature Studies
• 310 temperature sensors are collocated throughout the barrel.
• Temperatures are monitored by the RPC DCS system online
• Values are written in OMDS with a 0.3°C dead band (sensor resolution).
• Temperatures measured during Cruzet3 & 4 were analyzed and are here presented.
• The behavior of each single sensor has been studied.
Average Temperature for 3 Wheels during Cruzet3
Wheel0 appears to be the hottest one at all times
In 6 days the average temperature of the wheels increases of ~ 1 -1.5°C as you may see from the next slide62 sensors/Wheel
Temperature Distribution for 3 Wheels at the beginning and end of
Cruzet3
Black = 07/07/2008 2pmRed = 13/07/2008 2pm
While the average temperature is below the critical value (23°C) our concern are due to these tails
Average Temperature Plot and Distribution for Reference sensors during Cruzet3
Compatible with a horizontal line
Possible heating sources• RPC FEB LVs• DT FEB & MiniCrate LVs• ECAL Cables(???)
What happens if RPC LVs are turned off?
LVs OFF from 09/07/2008 7pm
Slopes measured in
°C/day
(8.5 ± 1.1) * 10-2
(11.5 ± 1.3) * 10-2
(9.0 ± 1.2) * 10-2
(9.9 ± 1.3) * 10-2
(9.3 ± 1.1) * 10-2
~1°C every 10 days of increase
DT minicrates ON
What happens if DT LVs are off?
Data from Cruzet4DT LV off the entire period on Sectors 6 & 7 Wheel-2RPC FEBs ON
DTemp with DT OFF & RPC ON
°C
Temperature increase distribution after 5 days with DT LVs OFF
W-2 Sector 4 RB1in & RB1out
Temperature with DT&RPC ON
DT ON – Cruzet4
Weekend = RPC ON & DT OFF
~ 2.5 °C of increase during Cruzet 4 week
---------
~1.5°C of increase in the
first day
Temperature of water during Cruzet 4
°C
Sensor stopped reading ~2.5 hours
Cooling Schema
Flow-limiters 1.5 liter/minute
1.5 x 50/2 = 37 l/min/wheel
1.5 x 50/2 = 37 l/min/wheel
Cooling
• Cooling water is shared by 2 adjacent sector
• Sectors are twined as shown in the tables
IN OUT
12 11
10 9
8 7
6 5
4 3
2 1
IN OUT
12 1
2 3
4 5
6 7
8 9
10 11
Wheels +1,0,-1,-2 Wheel +2
IN
OUTRB4
RB4RB3
RB2
RB1 RB1
RB2
RB3
DTemp between RB4 and RB1in
Even Sectors
Odd Sectors
Temperature Distribution by Stations
RB1in
RB1out
RB2
RB3
RB4
Temperatures refer to the 11/07/2008 2pmTemperatures refer to the 11/07/2008 2pm