IBL cooling operation at bake-outIBL CO2 meeting 10 April 2014

Bart Verlaat, Lukasz Zwalinski, Maciej Ostrega, Olivier Crespo Lopez

1

Special operation for bake out

• To have a guaranteed cooling during bake out a special procedure is in place:– Both systems in parallel

• If 1 fails we interlock the bake-out– Safe cooling down at half the flow from the 2nd system

• If both systems fail a bottle is emptied through the transfer line to have cooling for an extended time.

– Operation at a temperature set point of -20’C

2

AC042

LP101

ventevacuate

6

8

FT106

⅜”

EH106TT106TS106

EH101 / EH102 / EH103TT101 / TT102 / TT103TS101 / TS102 / TS103PT101 / PT102 / PT103

HX150

CO2 system A100 labels

LT142LT342

FT306

FL304

⅜”

FL306

VP05

6

50

40

12

4444

46

48

PV110

PT150/ TT150/ SC150

¼”

BD108PT108TT108

CO2 from experiment

CO2 to experiment

42

PT142

PV108

PV144

HX148

TT148BD148

SV042 SV043MV042

FL144

MV041

TT146

AV108

Freon chiller A

200

CO2 system B300 labels

10

LP101EH301 / EH302 / EH303TT301 / TT302 / TT303TS301 / TS302 / TS303PT301 / PT302 / PT303

4

FL344

PT304TT304

MV306

6

8

EH306TT306TS306

BD308PT308TT308

AV308

PV308

PV310

PV344

46 TT346

HX350

HX348

LP301

Fill port

nc

nc

no

nc

no

nc

MV050

MV054MV052 MV056BD054

PT054

EV148 EV348

nc nc

50

PT350/ TT350/ SC350

SV040 MV040

SV041 BD01210

MV058

NV110

MV110 MV310nc

CV142

nc

CV342

ncnc

ncnc

nc

nc

Cold CO2 lineCold R404a lineWarm service line(Cold lines require 32mm insulation)

no

NV310

no

¼” ¼”

½”½”

½”

½” ½”

48 TT348BD348

Freon chiller B

400

MV043

PT342

BV, 28-01-2014

PT040

PT042

PT056

PRC142 controlling CV142, EH142/143(PT142 & SC150)

PRC342 controlling CV342, EH342/143(PT342 & SC350)

PT050 PT058

no

FL104

4 PT104TT104

nc

FL106

Fill port

MV106

EH142/143TT142/143TS142/143

FL042

EH342/343TT342/343TS342/343

MV012

MV039

AV012

PV110

CO2 from experiment

CO2 to experiment

PV144

LP101

PV310

PV344

nc

ncnc

nc

MV012

MV039

AV012

nono

Vent

Water

no

Normal operation: 2 systems running

All pneumatic valves are pressurized

PV110

CO2 from experiment

CO2 to experiment

PV144

LP101

PV310

PV344

nc

ncnc

nc

MV012

MV039

AV012

nono

Vent

Water

no

Failure: 1 system stops, bake out is interlocked

Pneumatic valves of blow system stay pressurized

PV110

CO2 from experiment

CO2 to experiment

PV144

LP101

PV310

PV344

nc

ncnc

nc

MV012

MV039

AV012

nono

Vent

Water

no

Failure: 2 systems stop, blow system activated

All system valves loose air pressure, blow system valves automatically openend

Blow system connection location

7

R404a 2-stage chiller

CO2 unit

Accumulator

unit

Blow system summary

• A failure of both system cause automatically a blow system activation.– Safe against: cooling system failure by interlocks– Power loss, blow system is activated in fail safe

condition meaning valves will be opened• Parts have been ordered from SR1 foreseen

test ( never carried out)• Blow system activation can be tested over

junction box.