1. C ONCENTRIC TUBE H EAT EXCHANGER TEST SETUP AT C RYOLAB CO2 FOR CMS T RACKER WEEK MEETING. Theodoros Katopodis PH-CMX

2. CTHX PIPE TESTS CO2 FOR CMS T RACKER WEEK MEETING A. CTHX theoretical considerations. B. Cryolab’s restrictions and interior design. A. Designing approach by using Catia. i. 3D models. ii. 2D models B. CTHX construction procedure. i. Welding/Bending/Insulation at Gasgroup. ii. Transportation at Cryolab. iii. Insulation. C. CTHX insulation. D. CTHX installation. E. Future tasks. 5/13/2013 2 Theodoros Katopodis PH-CMX

3. The concentric tube heat exchanger consists of two tubes that are concentrically arranged. One of the fluid (either hot or cold fluid) flows through the tube and the other through the annulus. Heat is a form of energy that flows due to difference in temperature between two points that are located within a medium or in two different media. The transfer of heat occurs via one or any combination of the three modes of heat transfer - conduction, convection and radiation. Similarly, the rate of heat transfer can be described by the following equations: 5/13/2013 3 Theodoros Katopodis PH-CMX CTHX PIPE TESTS CO2 FOR CMS T RACKER WEEK MEETING A simplified representation of heat transfer between two fluids through the walls of a CTHX.  The new CTHX is made of stainless steel in a two layers of insulation, trying to improve the system performance, reaching stable conditions : Tsupply=-40°C and Treturn=-20°C.  The CTHX will be tested at Cryolab (connected from the one side (cooling plant) directly to the other (four Loops mockup of Joao’s tests). CTHX theoretical considerations.

4. 5/13/2013 4 Theodoros Katopodis PH-CMX CTHX PIPE TESTS CO2 FOR CMS T RACKER WEEK MEETING Cryolab’s restrictions and interior design. Cryolab building 158 view before the removal of the scaffolding. No space at all!!

5. 5/13/2013 5 Theodoros Katopodis PH-CMX CTHX PIPE TESTS CO2 FOR CMS T RACKER WEEK MEETING Cryolab’s restrictions and interior design. The most candidate place where we could install the concentric tube pipes.

6. 5/13/2013 6 Theodoros Katopodis PH-CMX CTHX PIPE TESTS CO2 FOR CMS T RACKER WEEK MEETING Cryolab’s restrictions and interior design. Cryolab building 158 view after the removal of the scaffolding. Cooling Box (CMS 4 Layer mockup) Cooling Plant Horizontal Path Vertical Path 5m 4m

7. The plan is to represent in a 3D simple drawing model the room space of Cryolab more or less precisely. 5/13/2013 7 Theodoros Katopodis PH-CMX 3D models 3D_Assembly connection between Cooling plant and CTHX. 3D_Cryolab room place. 3D_The CTHX. 3D_The CTHX view. CTHX PIPE TESTS CO2 FOR CMS T RACKER WEEK MEETING

8. 5/13/2013 8 Theodoros Katopodis PH-CMX 2D models 2D_Views of the CTHX. 2D_Assembly connection between Cooling plant and CTHX. o Concentric Stainless Steel Tube i.Inside Tube ID=4mm and OD=6mm. ii.Outside Tube ID=10mm and OD=12mm. 2D_ISO view of the CTHX. CTHX PIPE TESTS CO2 FOR CMS T RACKER WEEK MEETING o Armaflex Insulation i.First Layer ID=12mm and OD=35mm. ii.Second layer ID=35mm and OD=100mm.

9. 5/13/2013 9 Theodoros Katopodis PH-CMX  Tubes arrived at CERN in bunches of 6m. i. ID= 4mm and OD= 6mm (3x6m). ii. ID= 10mm and OD= 12mm (3x6m).  Construction process Welding process ( by using the orbital welding-a specialized area of welding whereby the arc is rotated mechanically through 360° around a static work piece, an object such as a pipe, in a continuous process). Small tube is placed inside the big. Cross unions tees were installed to the marked points (where it is supposed to be located the PPT). Subsequently the two tubes bended together ( by using the hand tube bender to different 6 points following a bend radius of 38 °). Before the transportation the CTHX was insulated (by using the thin insulation of ID=12mm and OD=35mm ). Afterwards the 18m CTHX transported at Cryolab, in order to be adjusted on the correct position. Holes opened on the wall (for the vertical path). Supporting brackets fixed on the wall, holding stable the CTHX to the horizontal path. Insulate the CTHX with the second layer of Armaflex ID=35mm and thickness of 32mm. Pressure transmitters installed. CTHX PIPE TESTS CO2 FOR CMS T RACKER WEEK MEETING CTHX construction procedure.

10. 5/13/2013 10 Theodoros Katopodis PH-CMX CTHX PIPE TESTS CO2 FOR CMS T RACKER WEEK MEETING During the construction at Gasgroup.Installing at Cryolab at Cryolab. CTHX transportation from Gasgroup workshop to Cryolab Insulating with the first layer.

11. 5/13/2013 11 Theodoros Katopodis PH-CMX CTHX PIPE TESTS CO2 FOR CMS T RACKER WEEK MEETING CTHX insulation.  Insulating with the second thick layer.  Drilling holes, fixing supports and placing the CTHX. During the insulation procedure. Awaiting for the glue to dry out.

12. 5/13/2013 12 Theodoros Katopodis PH-CMX CTHX PIPE TESTS CO2 FOR CMS T RACKER WEEK MEETING Collier support Armafix ø 42/45 K avec collier support. Wall mounting brackets x 3, holding the CTHX on the horizontal path. CTHX connection to four loops mockup. CTHX connection cooling plant. PTT_01 CTHX installation. PTT_02

13. 5/13/2013 13 Theodoros Katopodis PH-CMX CTHX PIPE TESTS CO2 FOR CMS T RACKER WEEK MEETING Horizontal path view. CTHX installation.

14. 5/13/2013 14 Theodoros Katopodis PH-CMX CTHX PIPE TESTS CO2 FOR CMS T RACKER WEEK MEETING CTHX installation. CTXH to cooling box connection. Still needs to be insulated.. Cooling plant to CTXH connection. Still needs to be insulated. CTHX view

15. 5/13/2013 15 Theodoros Katopodis PH-CMX CTHX PIPE TESTS CO2 FOR CMS T RACKER WEEK MEETING Future tasks. A. Insulate the CTHX assembly connections (cooling plant, box). B. Fix the PTT_02. C. All the connections should be well done tightened. D. A possible pressure test. E. Calculations about the CTHX performance. F. Comparison to future measurements. Many thanks to Joao and Abdel. Acknowledgements

16. 12/20/2012 16 Theodoros Katopodis PH-CMX CTHX PIPE TESTS CO2 FOR CMS T RACKER WEEK MEETING