PANDA 17/2 Collaboration Meeting 08.06.2017 BWEC Cooling shell design S. Ahmed, L. Capozza, A. Dbeyssi, P. Grasemann, J. Jorge Rico, F. Maas, O. Noll, D. Rodríguez Pi ñ eiro, S. Wolf BWEC Cooling shell design 08.06.2017
Contents 1. Overview 2. Calculations (thermal and fluid mechanics) 3. 3D design 4. Simulations (thermal and fluid mechanics) 5. Summary and future tasks 2 BWEC Cooling shell design 08.06.2017
Overview What is our aim? 3 BWEC Cooling shell design 08.06.2017
Overview Overview Cooling requirements Outer shell Inserts Mounting plate • Work at -25 ° C Cover • Maximum 500 mbar pressure drop (leakless-mode) • Limited space • Low temperature gradient Front cooling Boards Vacuum insulation panel (VIP) Crystals Coolant Methanol 60% Water 40% Inner shell Property Value Units Density 930 kg/m3 Dynamic viscosity 0.0077 kg/s/m Cp 3151 J/kg/K 4 BWEC Cooling shell design 08.06.2017
THE PROCESS IS THIS 5 BWEC Cooling shell design 08.06.2017
Calculations Thermal and fluid mechanics calculations of the cooling shells 6 BWEC Cooling shell design 08.06.2017
Thermal calculations Heat sources ◉ Electronics P ◉ Heat flow through the walls ◉ Power to cool down +70C ° ° APFEL 1.5 7 BWEC Cooling shell design 08.06.2017
Thermal calculations Electronics ◉ 150 mW/crystal * 524 crystals =78.60 W ◉ Applied in back side of crystals ◉ Cables out of the detector are not taken into account 8 BWEC Cooling shell design 08.06.2017
Thermal calculations Outer face Heat flow through walls Front face Back face Worst case at 70 ° C surrounding temperature Inner face Source Value [W] Outer face 40.23 Inner face 17.25 Front face 16.63 Back face 18.59 Radiation 27.92 9 BWEC Cooling shell design 08.06.2017
Thermal calculations Power to cool down ◉ Constant cooling flow ◉ Initial temperature 30 ° C ◉ Final temperature -25 ° C ◉ Time 24 h 0,06 𝑛 3 ∙ 8280 𝑙 ∙ 262 𝐾 𝑙 ∙ (55 ° 𝐷) 𝑸 = 𝑛 ∙ 𝐷 𝑞 ∙ ∆𝑈 𝑛 3 = = 𝟗𝟒. 𝟏𝟏 𝑿 𝑢 24 ℎ ∙ 3600 𝑡 10 BWEC Cooling shell design 08.06.2017
Summary of heat sources Stationary Transient Source Value [W] Source Value [W] Outer face 40.23 Outer face 40.23 Inner face 17.25 Inner face 17.25 Front face 16.63 Front face 16.63 Back face 18.59 Back face 18.59 Radiation 27.92 Radiation 27.92 Electronics 78.60 Cooling down 83.00 Total 199.30 Total 203.70 Total*1.5 298.95 Total*1.5 305.98 Safety factor 1.5 11 BWEC Cooling shell design 08.06.2017
Thermal calculations Mass flow calculation Distance between pipes • 0.3 ° C between inlet and outlet (homogeneity) • 0.25 ° C max temperature difference (homogeneity) • 15 mm thickness 𝐷 𝑞 ∙ ∆𝑈 = 0.3237𝑙 𝑄 → 20.88𝑚 𝑄𝑀 2 8∆𝑈𝑙𝑢 𝑛𝑗𝑜 𝑛 = 8 ∙ 𝑙 ∙ 𝑢 = ∆𝑈 → 𝑀 = 𝑡 𝑄 • 2 outer shells and 2 inner shells L • Outer shell 7.34 l/min • Inner shell 3.10 l/min • L= 150 mm 12 BWEC Cooling shell design 08.06.2017
Fluid mechanics calculations (Half outer shell) Outer shell parts • 5 front square connectors • 6 pipes d = 13 mm • 4 back elbow connectors • 4 pipes d = 10 mm 13 BWEC Cooling shell design 08.06.2017
Fluid mechanics calculations Pipe with d = 10 mm Elbow of d = 10 mm ∆𝑞 = 8𝑅 2 𝑔 𝑀 ∆𝑞 = 8𝑅 2 𝑔 𝑀 + 𝑀 𝑓𝑟 𝐸 5 𝜍 = 11.37𝑛𝑐𝑏𝑠 𝜍 = 21.05 𝑛𝑐𝑏𝑠 𝜌 2 𝜌 2 𝐸 5 Pipe with d = 13 mm Square connector (estimation) ∆𝑞 = 8𝑅 2 ∆𝑞 = 8𝑅 2 𝑔 𝑀 + 𝑀 𝑓𝑟 𝑔 𝑀 𝜍 = 27.60 𝑛𝑐𝑏𝑠 𝐸 5 𝜍 = 3.99 𝑛𝑐𝑏𝑠 𝜌 2 𝜌 2 𝐸 5 14 BWEC Cooling shell design 08.06.2017
Fluid mechanics calculations summary Part Pressure drop (mbar) Amount Total Pd (mbar) Straight d =13 mm 3.99 6 23.94 Straight d = 10 mm 11.37 4 45.48 Elbow d = 10 mm 21.05 4 84.20 Square connectors 27.60 5 138.00 Total 291.62 mbar 𝟑𝟘𝟐. 𝟕𝟑𝒏𝒄𝒃𝒔 < 𝟔𝟏𝟏𝒏𝒄𝒃𝒔 15 BWEC Cooling shell design 08.06.2017
🎩 3D design An overview of the outer shell 3D design 16 BWEC Cooling shell design 08.06.2017
3D design 17 BWEC Cooling shell design 08.06.2017
3D design Front square connectors Back elbows 18 BWEC Cooling shell design 08.06.2017
Simulations Thermal and fluid mechanics simulations Autodesk Simulation Mechanical & Autodesk CFD 2016 19 BWEC Cooling shell design 08.06.2017
Thermal simulations Outer shell (Aluminum) Front shell Inserts (HDPE) (Aluminum) Gap (air 4mm) Crystals (PbWO4) Inner shell (Aluminum) 1 quarter dummy for simulations 20 BWEC Cooling shell design 08.06.2017
Thermal simulations Only outer and inner shells -25.08 °C ◉ Not front shielding -23.14 °C ◉ 2 ° C gradient 21 BWEC Cooling shell design 08.06.2017
Thermal simulations Back pipe with both inner and outer shells ◉ Back homogeneity -25.10 °C ◉ Not front shielding -23.16 °C ◉ 2 ° C gradient 22 BWEC Cooling shell design 08.06.2017
Thermal simulations Front shell, back pipe and both inner and outer shells Out of scale -5°C ◉ Front shielding ◉ Less than 0.5 ° C gradient -25.00 °C ◉ Solid angle loss (further -24.00 °C for the IP) 23 BWEC Cooling shell design 08.06.2017
Thermal simulations Possible 140W (STT worst elect. case) front without front cooling -25,06 °C ◉ Huge temperature -17.87°C gradient (7.13 ° C) 24 BWEC Cooling shell design 08.06.2017
Thermal simulations Possible 140W (STT worst elect. case) front with front cooling Out of scale 57°C ◉ Good front protection ◉ Less than 0.5 ° C gradient -25.00 °C ◉ Solid angle loss (further -24.00°C from the IP) 25 BWEC Cooling shell design 08.06.2017
Fluid mechanics simulations Straight pipes and elbow 4.00 mbar 23.82 mbar 11.63 mbar 26 BWEC Cooling shell design 08.06.2017
Fluid mechanics simulations Front square connectors 27 BWEC Cooling shell design 08.06.2017
Fluid mechanics simulations Front square connectors 28 BWEC Cooling shell design 08.06.2017
Fluid mechanics simulations Front square connectors 29 BWEC Cooling shell design 08.06.2017
Fluid mechanics simulations Front square connectors 35.44 mbar 31.21 mbar 30.28 mbar 30 BWEC Cooling shell design 08.06.2017
Fluid mechanics simulations Summary Part Pressure drop/part(mbar) Amount Total Pd (mbar) Straight d = 10 mm 11.63 4 46.52 Straight d = 13 mm 4.00 6 24.00 Elbow d = 10 mm 23.82 4 95.28 Square conn 1 35.44 2 70.88 Square conn 2 31.21 2 62.42 Square conn 3 30.28 1 30.28 Total 329.38 mbar 31 BWEC Cooling shell design 08.06.2017
Fluid mechanics calculations vs. simulations Pressure Pressure Total Pd Total Pd Part drop Amount Part drop Amount (mbar) (mbar) (mbar) (mbar) Straight Straight 11.37 4 45.48 11.63 4 46.52 d =10 mm d = 10 mm Straight Straight 3.99 6 23.94 4.0 6 24.00 d = 13 mm d = 13 mm Elbow Elbow 21.05 4 84.20 23.82 4 95.28 d = 10 mm d = 10 mm Square Square 27.60 2 55.20 35.44 2 70.88 conn 1 conn 1 Square 27.60 2 55.20 Square conn 2 31.21 2 62.42 conn 2 Square Square 27.60 1 27.60 30.28 1 30.28 conn 3 conn 3 Total 329.38 mbar Total 291.62 mbar 32 BWEC Cooling shell design 08.06.2017
Summary and future works What is next? 33 BWEC Cooling shell design 08.06.2017
Summary ◉ Less than 0.3 o C of gradient in the coolant temperature ◉ Good homogeneity with front cooling ◉ Low pressure drop: Calculations Simulation 291.62 mbar 329.38 mbar ◉ Different pressure drop values because of the square parts (simplifications in calculations for complex geometry) 34 BWEC Cooling shell design 08.06.2017
Future works ◉ Building an outer shell prototype (on process) ◉ Make measurements for validating calculations and simulations ◉ Tests for front cooling with existing prototype (on process) ◉ Design inner shell with the same procedure 35 BWEC Cooling shell design 08.06.2017
THANKS! Any questions? You can write me jjorgeri@uni-mainz.de 36 BWEC Cooling shell design 08.06.2017
Back Up slides 08.06.2017 BWEC Cooling shell design
Front cooling Preparation in Outer shell and MP B1 BWEC Cooling shell design 08.06.2017
Front cooling Preliminary design ◉ Parallel circuits (low pressure drop) ◉ Different diameter each branch (homogeneity) ◉ 3D printed (HDPE) B2 BWEC Cooling shell design 08.06.2017
Simulations Velocity examples B3 BWEC Cooling shell design 08.06.2017
Thermal calculations General inputs B4 BWEC Cooling shell design 08.06.2017
Thermal calculations Example B5 BWEC Cooling shell design 08.06.2017
Thermal calculations Output summary B6 BWEC Cooling shell design 08.06.2017
Fluid mechanic calculations Serial Pressure drop calculator ◉ Inputs: Coolant • Section ´ s geometry • Length • Local elements • Flow • Valve • Height • B7 BWEC Cooling shell design 08.06.2017
Recommend
More recommend
![Design Patterns in Eiffel Dr. Till Bay design patterns? [Design Patterns] are](https://c.sambuz.com/1019917/design-patterns-in-eiffel-s.jpg)
