1. Detector Cooling Project WP2 CO2 activities status report
Jan Godlewski on behalf of CO2 working group
Bart Verlaat, Joao Noite, Hans Postema, Jan Godlewski, Raphael Dumps, Paolo Petagna, Lukasz Zwalinski, Jerzy Kotula, Jerome Daguin, Jihao Wu, Paola Tropea, Viren Bhanot, Tomasz Niezgoda and many others that already left CERN and working outside of CERN
J.Godlewski PH-DT-PO
DCP 20 April 2011

2. Test stand for gear pumps
Cryolab test stand
Modifications and changes
Tests
Modular units
1kW unit
Design
Interested Institutes
Manpower and budget issues
100 W units
Concept
Assembly status
Test stand for gear pumps
First approach
Status
Students (stage) from Krakow to help on work with CO2
A lot of information about CO2 activities in PH-DT can be found in Bart talk at PH-DT seminar from 8 April A lot is copied from this talk
J.Godlewski PH-DT-PO
DCP 20 April 2011

3. WP2 CO2
J.Godlewski PH-DT-PO
DCP 20 April 2011

4. Cryolab test stand
A lot of changes/improvement have been done recently
Change of heaters
Improving the tests in small mass flows
Adjusting control system
Tests on Belle stave done by Max Planck at Munich
Good results
Perspectives on collaboration
Measurements on Cryolab small stave –Jihao
Problem with cooling capacity of the chiller
Capacity of the chiller went down substantially in comparison with the beginning of operation. Probably permanent use of the compressor out of it range could be the reason.
Week 4-8 April Stefan Heindl, Thomas Weiler and Tobias Barvich from Karlsruhe came to CERN and tested the thermal structure of the Belle-2 pixel detector during several days using the full scale test setup in the Cryolab.On Thursday, Christian Kiesling and Hans-Gunther Moser visited the setup and we discussed the possibilities for future collaboration.
From Hans Postema
J.Godlewski PH-DT-PO
DCP 20 April 2011

5. Cryolab test stand PVSS
J.Godlewski PH-DT-PO
DCP 20 April 2011

6. 1 kW unit
Commercial chiller
2-Pump option
Experiment connection
Condenser
Accumulator
Cooling water
It is a design that should be a base for the future cooling plants
IBL
XFEL
BELLE
It is a common design of CERN and NIKHEF
Share point address:
J.Godlewski PH-DT-PO
DCP 20 April 2011

7. J.Godlewski PH-DT-PO
DCP 20 April 2011

8. CO2 gear pumps test stand
Gear pumps are an option for 1 kW and 100 W CO2 cooling units as they have stable (not pulsating) flow. Long term tests are foreseen on the dedicated test stand. First bunch od gear heads shown leaks on the sealing and have been sent to manufacturer. They came back and are presently dried before starting the tests. This activity is coordinated by Bart and stage students from Krakow helped to build and will make the tests.
J.Godlewski PH-DT-PO
DCP 20 April 2011

9. Process simulations
J.Godlewski PH-DT-PO
DCP 20 April 2011

10. Other CO2 activities at CERN
SR1 CO2 cooling unit for IBL
Details in M.Battistin talk in ATLAS Upgrade Week
Planned delivery of the cooling system: beginning of May, we expect 2 weeks of delay.
Share point for this activity
CMS flash system
Cryolab small scale tests (heat transfer and pressure drops)
Rahmani Mustafa (stagiere from Grenoble) working on continuation of A.Moreaux work
He is concentrated on heat exchanger simulation
J.Godlewski PH-DT-PO
DCP 20 April 2011

11. Summary A lot of activities ongoing
Cryolab test stand is a good test field for future development
Very good collaboration with Cryolab
Construction of 1 kW and 100 W units is advancing well
Good collaboration between CERN and NIKHEF (share of responsibilities and recourses)
New partner appeared – MPI Munich (BELLE)
They will dedicate manpower for construction
SR1 test stand for IBL will be finished in May
Students “stagiers” from Krakow are giving substantial help to CO2 activities
There are three different share pages for CO2 activities at CERN. It would be good if everyone has a link to others.
Next time I will report on CO2 activities in Krakow
J.Godlewski PH-ATU
DCP 20 April 2011