Comparison of cooling services at barrel end Description SCT Barrel Upgrade ID barrel one end one...

Comparison of cooling services at barrel endDescription SCT Barrel Upgrade ID barrel one end one end

Total number of staves/rows 176 Staves/rows serviced off one end 88 use sample of 88 Length of stave/row wrt barrel length full length half lengthTotal exhaust pipes off barrel end 22 88Total input pipes off barrel end 44 88Number of pipes on each stave/row 1 2Staves/rows served by 1 exhaust pipe 4 1Staves/rows served by 1 input pipe 2 1Cooling ‘unit’ serves: alternate 4 rows integrated with staveLocation of exhaust manifold inside barrel end no manifoldingNumber of pipes to manifold 2 pipes go to 1 “Length of manifold approx. 60mm “Material exhaust spiders Cu ssMaterial input capillary CuNi ssNumber exhaust connectors 22 88Number input connectors 44 88Extra pipe on stave/row > SCT x 2Extra exhaust pipe on barrel end > SCT x 4Extra pipe outside barrel end > SCT x 3

modules

staves

Current SCT Barrel cooling layout for 4 rows – 1 manifold.

Upgrade SCT Barrel cooling layout for 4 rows – no manifolds

Schematic illustrating comparative occupation of cooling pipes/manifolds/connectorson one barrel end flange – overlap of modules not shown, equivalent active area – 4 full length rows on ‘old’ compared with half-length ‘new’ (very approx.) Not to scale.

end

flang

e

cooling direction

SCT BARREL END…..22 Cu cooling pipe spiders

Wait and see……if this scenario leads to a 10% loss in the EC thenUpgrade will probably lose 40% in the EC even without cooling connectors.