1. ESS Cryogenic Distribution System for the Elliptical Linac CDS Heat Loads Calculations Preliminary Design Review Meeting. 20 May 2015. ESS. Lund. Sweden J. Polinski. J. Skrzypacz. P. Jaszak

2. Heat paths to the CDS process lines Fixing supports Vacuum barrier in the Jumper Connections Sliding supports Thermal Insulation - MLI Croygenic Valves

3. Fixed Support Heat Transfer CTL – 14 supports CDL – 30 supports CDLVLPHe supplyTS supplyTS return Heat [W]0.770.360.1322.2 CTLVLPHe supplyTS supplyTS return Heat [W]1.220.30.122.5

4. Vacuum Barrier Heat Transfer VLPHe supplyTS supplyTS return Heat [W]0.15460.0450.03830.136 CTL – 0 VB CDL – 30 VB

5. Sliding Support Heat Transfer CTLVLPHe supplyTS supplyTS return TS Heat [W]0.140.001-0.0530.0121.78 CTL – 27 CDL – (4×30)=120

6. Multi Layer Insulation He Supply Line – 50-4K. 10 layers VLP Line – 50-4K.10 layers TS Supply Line – 50-40K. 10 layers TS Return Line – no MLI. TS Return = TS Thermal Shield (TS) –300-50K. 30 ÷ 40 layers Temp. range300-50 K50-40 K50-4K Heat [W/m 2 ]1.30.010.1

7. Cryogenic Valves Heat Transfer – after WEKA AG catalogue Valve NameLocation Valve size Heat 300 – 20K W Heat 300 – 4K W CV03He Supply LineDN 10NA0.33 CV04VLP LineDN 50NA2.6 CV06VLP LineDN 15NA0.47 CV60TS Supply LineDN 60.19NA CV61TS Return LineDN 60.19NA CV63TS Return LineDN 60.19NA Total number of the valves – 30 of each type

8. Heat Loads to CTL Size OD mm Length m Area m 2 MLI 300-40K W/m 2 MLI 50-40K W/m 2 MLI 40-4K W/m 2 Sliding Supports W Fixing Supports W He supply lineDN6576.16415.3001.530.0274.2 VLP lineDN2502736454.9005.493.7817.08 TS Supply LineDN5060.36412.100.1210-1.4311.4 TS Return LineDN5060.36412.1=TS000.324315 Thermal ShieldNA4756495.51240048.060 Heat Total to CTL W Heat Limit W Prc. of Limit % He supply line5.7510.355.9 VLP line26.3431.882.8 TS Supply Line0.095.51.64 TS Return Line487.54450108.3

9. Heat Loads to CDL Size OD mm Length m Area m 2 MLI 300-40K W/m 2 MLI 50- 40K W/m 2 MLI 40- 4K W/m 2 Sliding Supports W Fixing Supports W He supply line DN6576.125661.2006.120.1210.8 VLP line DN250273256176.20017.616.823.1 TS Supply Line DN5060.325648.4900.4850-6.363.9 TS Return Line DN5060.325648.49=TS001.44666.0 Thermal Shield NA475256382496.600213.60 Size ODLengthArea MLI 300- 40K MLI 50- 40K MLI 40- 4K Sliding Supports Vac. Barrier Valves mmmm2W/m2 WWW He supply lineDN1017.153.980.2140021.4E-30.031.359.9 VLP lineDN5060.33.670.695006.96E-34.24.6492.1 TS Supply LineDN813.73.330.14301.4E-30-1.591.155.7 TS Return LineDN813.7NA =TS000.364.0811.4 Thermal ShieldNA9240.822.383.100NA Main Headers Branch Headers

10. Heat Loads to CDL Main Headers W Branch Headers W Heat Total to CDL W Heat Limit W Prc. of Limit % He supply line17.0411.328.3471.139.86 VLP line57.52101158.5203.877.78 TS Supply Line-1.975.263.28537.28.83 TS Return Line137718.941396183176.27

11. Heat Loads to CDS Heat Total to CTL W Heat Total to CDL W Heat Total W Heat Limit W Prc. of Limit % He supply line5.7528.3434.0981.441.9 VLP line26.34158.5184.9235.678.5 TS Supply Line0.093.2853.37542.77.9 TS Return Line487.5413961884228182.6