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

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

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

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

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

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. range K50-40 K50-4K Heat [W/m 2 ]

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

Heat Loads to CTL Size OD mm Length m Area m 2 MLI K W/m 2 MLI 50-40K W/m 2 MLI 40-4K W/m 2 Sliding Supports W Fixing Supports W He supply lineDN VLP lineDN TS Supply LineDN TS Return LineDN =TS Thermal ShieldNA Heat Total to CTL W Heat Limit W Prc. of Limit % He supply line VLP line TS Supply Line TS Return Line

Heat Loads to CDL Size OD mm Length m Area m 2 MLI K W/m 2 MLI K W/m 2 MLI 40- 4K W/m 2 Sliding Supports W Fixing Supports W He supply line DN VLP line DN TS Supply Line DN TS Return Line DN =TS Thermal Shield NA Size ODLengthArea MLI K MLI K MLI 40- 4K Sliding Supports Vac. Barrier Valves mmmm2W/m2 WWW He supply lineDN E VLP lineDN E TS Supply LineDN E TS Return LineDN813.7NA =TS Thermal ShieldNA NA Main Headers Branch Headers

Heat Loads to CDL Main Headers W Branch Headers W Heat Total to CDL W Heat Limit W Prc. of Limit % He supply line VLP line TS Supply Line TS Return Line

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 line VLP line TS Supply Line TS Return Line