TTCS simulation status report

2023年4月21日

Tracker Thermal Control System

TTCS simulation status reportTTCS simulation status report

SYSU: S.S.Lv, D.C. Mo, Z.C. Huang, Z.H. He

NLR: E. van Johannes, P.Aswin

CGS: C.Vettore, M.Molina

2023年4月21日


OutlineOutline

• Status of TTCS modeling

• Simulation result– Cold orbit result– Hot orbit result

• Summary

2023年4月21日


Status of TTCS modelingStatus of TTCS modeling

• Modified and debugged the cmdv1.3 (combined model draft version 1.3)– Reversed the flow direction– Considered the contact conductance between the h

eatpipe and the facesheet of the radiator– Modified the thermal link of peltier– IF data debugged etc.

2023年4月21日


Reverse the flow directionReverse the flow direction

2023年4月21日


Contact conductance between the face sheet Contact conductance between the face sheet and HPand HP

Outside facesheet 5xxxx

ROHACELL HP 6xxxx

Inside facesheet 7xxxx

Condenser 9xxxx

MLI 10xxxx

5xxxx 6xxxx 7xxxx 9xxxx

Layers of the radiator

R56`=8.27E4W/K R56=181W/K

R67`=3.07E5W/K

R67=188W/KR79`=171W/K

R79=209W/K

2023年4月21日


Cases selected for simulationCases selected for simulation

Beta Angle SuggestedEnv

Screening rank

TTCB-P TTCB-S Ram RadPeak

Ram RadAvg

Wake RadPeak

Wake RadAvg

RadAvg

Delta T

75 -15-20-15 hot H1 H5 H1 H1

75 -15+00-15 hot H2 H2 H2

75+15+15+15 cold C1 C1 1

75 -15+00+15 cold C6 C1 C1

-75+00+00-15 cold C9 C1

2023年4月21日


Results of cold casesResults of cold cases

2023年4月21日


Temperature and QBYPR=+75+15+15+15

170

190

210

230

250

270

290

3. 7 4. 9 6. 2 7. 4 8. 7 9. 9 11. 2 12. 4 13. 7 14. 9 16. 2 17. 4Time(hr)

Tem

pera

ture

(K

) a

0.00

10.00

20.00

30.00

40.00

50.00

60.00

70.00

80.00

90.00

Sub

cool

ing(

K)

/Q (

W)

0

T_set(TL1000)

T_HX_liq_in(TL2101)

T_HX_liq_out(TL5000)

T_cds_out_ram(TL10032)

T_cds_out_wake(TL10033)

T_Uss(TTCBP.27100)

T_HX_2phase_in(XL10023)

T_HX_2phase_out(XL10025)

T_subcooling(TL1000-TL1)

Q_uss(HR1517~1520)

Q_preheater(PHbot+PHtop)

Q_cold orbit(Qheat)

Q_heatleak from Acc(HR1132)

Cold case1: BYPR=+75+15+15+15Cold case1: BYPR=+75+15+15+15

Tset=258KFR=2g/s

Cold orbit heaters

Pre-heaters

2023年4月21日


Temperature and QBYPR=+75-15_0+15

170

180

190

200

210

220

230

240

250

260

270

3.7 4.9 6.2 7.4 8.7 9.9 11.2 12.4 13.7 14.9 16.2 17.4Time(hr)

Tem

pera

ture

(K

) a

0.00

10.00

20.00

30.00

40.00

50.00

60.00

70.00

80.00

90.00

Sub

cool

ing(

K) /Q

(W

) 0

T_set(TL1000)

T_HX_liq_in(TL2101)




T_Uss(TTCBP.27100)




Q_uss(HR1517~1520)


Q_cold orbit(Qheat)


Cold case2: BYPR= Cold case2: BYPR= +75-15_0+15+75-15_0+15

Cold orbit heaters

Tset=258KFR=2g/s

2023年4月21日


Cold case3: BYPR= -75_0_0-15Cold case3: BYPR= -75_0_0-15

Temperature and QBYPR=-75_0_0-15

170

180

190

200

210

220

230

240

250

260

270

3.7 4.9 6.2 7.4 8.7 9.9 11.2 12.4 13.7 14.9 16.2 17.4Time(hr)

Tem

pera

ture

(K

) a

0.00

10.00

20.00

30.00

40.00

50.00

60.00

70.00

80.00

90.00

Sub

cool

ing(

K) /Q

(W

) 0

T_set(TL1000)

T_HX_liq_in(TL2101)




T_Uss(TTCBP.27100)




Q_uss(HR1517~1520)


Q_cold orbit(Qheat)


Tset=258KFR=2g/s

2023年4月21日


Comparison of the cold orbit resultsComparison of the cold orbit results

CasesBYPR

Subcooling(K) cold orbit heater duty cycle

+75+15+15+15

11.3~15.8 51%

+75-15_0+15

16.7~19.9 67%

-75_0_0-15 16.1~18.9 46%

2023年4月21日


Summary for cold caseSummary for cold case

• The result of the cmdv1.3 shows that a power of 40W for the cold orbit heaters should be enough for keeping the loop running in the extreme cold cases.

2023年4月21日


Hot casesHot cases

2023年4月21日


BYPR=+75-15-20-15BYPR=+75-15-20-15

Temperature and QBYPR=+75-15-20-15

255

260

265

270

275

280

285

290

295

300

305

310

5.4 6.7 7.9 9.2 10.4 11.7 12.9 14.2 15.4Time(hr)

Tem

pera

ture

(K

) a

0.00

5.00

10.00

15.00

20.00

25.00

30.00

35.00

40.00

Sub

cool

ing(

K) /Q

(W

) 0

T_set(TL1000)

T_HX_l i q_i n(TL2101)

T_HX_l i q_out(TL5000)



T_Uss(TTCBP.27100)

T_HX_2phase_i n(XL10023)


T_subcool i ng(TL1000-TL1)

Q_uss(HR1517~1520)

Q_preheater(PHbot+PHtop)subcoolings

Tset=293KFR=2g/s

2023年4月21日


Qual i ty and temperature of the inlet of the pump

276

278

280

282

284

286

288

290

292

294

0.6

1.3

2.1

2.8

3.6

4.3

5.1

5.8

6.6

7.3

8.1

8.8

9.6

10.3

11.1

11.8

12.6

13.3

14.1

14.8

15.6

Time/hr

Temp

erat

ure(

K)

A

0

0.02

0.04

0.06

0.08

0.1

0.12

Qual

ity

A

LOOP.TL1LOOP.XL1

BYPR=+75-15-20-15BYPR=+75-15-20-15

2 phase

2023年4月21日


BYPR=+75-15-20-15BYPR=+75-15-20-15BYPR=+75-15-20-15

250

260

270

280

290

300

310

1.0 2.3 3.5 4.8 6.0 7.3 8.5Time/hour

Tem

pera

ture

(K) o

0.00

5.00

10.00

15.00

20.00

25.00

30.00

35.00

40.00

(sub

cool

ing/

K) or

(Q

/W)

T_set(TL1000)

T_HX_l i q_i n(TL2101)

T_HX_l i q_out(TL5000)



T_Uss(TTCBP.27100)

T_HX_2phase_i n(XL10023)


T_subcool i ng(TL1000-TL1)

Q_uss(HR1517~1520)


Tset=293KFR=4g/s

Pre-heaters

2023年4月21日


Summary of the hot casesSummary of the hot cases

• In the extreme hottest cases, TTCS loop is running with little sub cooling.

• Proposed solutions and impacts– Higher the set point– Higher the mass flow rate

• Higher pressure drop of the loop (up to 1600mbar)

• Higher the pre-heater power

2023年4月21日


Future workFuture work

• Building and debugging the TTCS v1.0– modified the length and volume to the latest loop l

ayout– More reliable accumulator model.

• Involving of the tracker people in modeling is started, and to be strengthened.

2023年4月21日


Thank youThank you

Documents

TTCS simulation status report