February 2006

To January 2006

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Date Hour ID Note
Wed 01/Feb/06 10:00 GG Vapours and injection pressure did not change. Does the LEAK CONTROL works? Weight 26.4 kg. Loops closed.
Thu 02/Feb/06 14:58 GG STAND-BY. Valve #8 return vapours-input compressor closed manually . Leak detection with PhoenilL300. Connections to the liquid manifold and to the return vapours of loop 2. 2.13E-8 mbar*l/s @ 3.1E-2 mbar. Open all the loops.
Fri 03/Feb/06 09:00 GG 2.07E-6 mbar*l/s @ 1.1E-2 mbar.
12:30 GG Checked all loops from the manifold to the "sectors", ceiling solderings too. No more than 2.11E-6 mbar*l/s @ 1.1E-2 mbar. Weight 25.3 kg. Locked all loops. Leak detector OFF.
Mon 06/Feb/06 09:00 GG System found in ALARM: weight variation @ 02:21 reported. Slow decrease of the weight in the last 24h. Leak of some valves to the vacuum?
11:35 GG Weight 23.4 kg @ 2.2 b. No relevant pressure variation in the loops and in the manifolds.
11:48 GG Loops opened, system in STAND-BY. Leak detector ON with closed vacuum valves: 2.7E-9 mbar*l/s @ 1.3E-2 mbar; opened blue valve: 3.1E-7 mbar*l/s @ 0.4 mbar; opened red valve: 2.1E-7 mbar*l/s @ 0.3 mbar, still decreasing.
12:15 GG Weight 23.2 kg @ 2.2 b. possible not vacuum valve for the liquid and/or the compressor input valves?
12:35 GG Weight 23.4 kg. 6.6E-8 mbar*l/s @ 2.7E-2 mbar.
14:00 GG Weight 23.8 kg. 8.7E-9 mbar*l/s @ 1.3E-2 mbar.
16:00 GG Weight 24.3 kg @ 2.2 ba and 20.7C. Disconnected leak tester. Loops locked. Restored valve #8 .
16:17 GG Opened loops 9-10. RUN with 1.880 b vapours and 2.700 b liquid.
17:28 GG Dummies stave ON. Loop 2 opened.
16:40 GG Weight 17.7 kg 2.2 b 19.7C.
17:22 GG Weight 14.9 kg 2.2 b 19.7C.
17:37 GG Weight 13.9 kg 2.2 b 19.7C.
18:17 GG Weight 11.2 kg 2.2 b 19.9C. ~4.2 kg/h. changed vapours pressure to 1.800b.
19:08 GG Weight 10.4 kg. RECOVERY.
Tue 07/Feb/06 15:40 GG Weight 25.6 kg @ 20C 2.2b. Locked loop 1 has 0.44 b while the other still ~0.01 b. Closed loop 2. Run with vapours 1.800 b and Liquid 2.700 b.
15:46 GG Dummy ON.
15:50 GG Loop 2 opened.
16:09 GG Weight 17.4 kg.
16:31 GG Weight 15.9 kg. RECOVERING. Dummy OFF
17:28 GG Weight 22.2 kg. RUN
17:35 GG Dummy ON. Weight 17.6 kg.
18:30 GG Weight 14.0 kg.
18:40 GG Weight 13.2 kg.
19:10 GG Weight 11.4 kg. RECOVERING. Dummy OFF. Loop 1 at 0.6 b!
Wed 08/Feb/06 08:30 GG Manifolds at 0.4 b, locked loop 1 at 0.54 b : Leak on loop 1. Loop 7 at 0.04 b; loop 3,4,5,6,8 at ~0.02 b.
10:35 GG Weight 25.5 kg. RUN.
10:40 GG Dummies ON.
10:48 GG Weight 18.0 kg.
11:52 GG Weight 14.0 kg.
12:22 GG Weight 12.0 kg.
12:35 GG Weight 11.0 kg. ~4.0 kg/h.
12:47 GG Stable at 11.0 kg. Loop 1 at 0.72 b.
13:28 GG Weight 10.2 kg.
13:45 GG Weight 10.1 kg. ~0.8 kg/h. Liquid is visible in the window before the compressor. RECOVERING, dummies OFF.
16:00 GG Weight 25.0 kg. Loop 2 closed. RUN. Loop 1 at 0.95 b.
16:09 GG Dummies ON. Dummy of loop 10 is detaching. Loop 2 opened.
16:40 GG Weight 16.2 kg. RECOVERING for end of the tests. Condensate on the vapours returns of loop 10.
17:10 GG Weight 21.8 kg. Loop 2 closed. RUN.
17:19 GG Dummies ON. Loop 2 open. Weight 17.5 kg.
17:30 GG Weight 17.0 kg.
17:45 GG Weight 16.1 kg.
18:00 GG Weight 15.3 kg.
18:15 GG Weight 14.5 kg. All sector 0 powered.
18:57 GG Weight 14.6 kg.
19:05 GG Weight 14.8 kg. Sector partially feed.
19:22 GG Weight 14.6 kg.
19:40 GG Weight 13.1 kg.
20:14 GG ALARM: weight variation. kg 13.2 (?): STOP. RECOVERING (only loops 2, 9, 10 opened; the other locked.
Thu 09/Feb/06 16:00 GG Weight 24.11 kg. Loop 1 at 1.65 b; loops 2, 9, 10 at 4 b; loops 3, 4, 5 at 2.16. Loops 6, 7, 8, at 2.26 b. Leak on loop 1.
16:07 GG All channels open... ALARM: booster overpressure. When the pressure in the loops is high, open the channel one by one, slowly!.
16:10 GG RECOVERING.
16:24 GG Locked loops 1, 3, 4, 5, 6, 7, 8. Weight 25.2 kg. Pression in all the loops ~ 0.35 b.
17:28 GG Loop 2 closed. Weight 25.3 kg. RUN.
17:37 GG Dummies ON, loop 2 opened, weight 18.9 kg.
17:46 GG Weight 17.8 kg.
18:10 GG Weight 16.4 kg.
18:32 GG Weight 15.2 kg.
19:03 GG Weight 13.4 kg.
19:51 GG Weight 11.0 kg. No liquid in the compressor yet.
19:58 GG Weight 10.7 kg. Liquid in the compressor. RECOVERING. Dummies OFF. Condensate on the vapours manifold. Next time would be better to open a closed circuit to decrease the liquid level before recovering.
20:25 GG Loop 1 at 0.51 b. The locked ones (not the 2, the 9 and the 10) at 0.37 b. Weight 22.9 kg. RUN.
20:32 GG Dummies ON.
20:42 GG Weight 15.0 kg.
21:05 GG Weight 14.4 kg stable.
21:13 GG Weight 14.3 kg stable.
21:43 GG Weight 13.6 kg linear decreasing.
22:05 GG Weight 13.2 kg.
22:08 GG Weight 13.0 kg. RECOVERING. Dummies OFF.
Fri 10/Feb/06 10:20 GG Weight 25.24 kg. Loop 2 closed. RUN.
10:35 GG Dummies ON. Weight 19.2 kg. Loop 2 opened.
10:39 GG Weight 18.2 kg.
11:06 GG Weight 17.3 kg.
11:36 GG Weight 17.2 kg. Stable: 9 half staves ON.
12:12 GG Weight 17.1 kg. Stable. Loop 1 at 0.63 b, the other locked at ~0.35 b.
13:20 GG Weight 17.1 kg. Stable. Loop 1 at 0.70 b.
22:00 IAC RECOVERING
Mon 13/Feb/06 10:35 GG Weight 24.9 kg. Loop 2 closed. RUN.
10:43 GG Dummies ON. Weight 18.5 kg. Loop 2 opened.
14:42 GG Weight 16.7 kg. Slowly decreasing.
15:23 GG Weight 16.0 kg. RECOVERING. Dummies OFF.
Week 7-8 AP
RT
AT
Changed the vacuum valve in the cleaning room on loop 1. Plate to fix the heater. Installed the PVSS interface. Changing on notation: loop open -> loop ON; loop closed -> loop OFF.
Mon 27/Feb/06 11:20 GG Weight 21.4 kg. Loops 1, 3, 4 are locked; loops 2, 5, 6, 7, 8 are OFF. All loop at ~0.37 b. Loop 9 and 10 ON. RUN.
11:25 GG Loop 2 ON.
13:08 GG RECOVERING. Loops 2, 9, 10 ON; the others OFF.
13:59 GG Loops 1, 3, 4, 5, 6, 7, 8 locked at ~0.4 b.; loops 2 OFF. RUN. Weight 21.4 kg.
14:11 GG Dummies ON. Loop 2 ON.
16:45 GG RECOVERING. Dummies OFF. Weight 16.1 kg.
Tue 28/Feb/06 11:00 GG Weight 23.1 RUN with usual procedure.

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To March 2006


ID Name
GG Gianluca Guaglio
IAC Ivan Amos Cali
AP Adrano Pepato
RT Rosario Turrisi
AT Arturo Tauro

Logbook

Cooling System

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Topic revision: r9 - 2006-05-17 - unknown
 
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