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TTCS simulation status report

TTCS 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. Outline. Status of TTCS modeling Simulation result Cold orbit result Hot orbit result Summary. Status of TTCS modeling.

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TTCS simulation status report

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  1. TTCS 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

  2. Outline • Status of TTCS modeling • Simulation result • Cold orbit result • Hot orbit result • Summary

  3. Status 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 heatpipe and the facesheet of the radiator • Modified the thermal link of peltier • IF data debugged etc.

  4. Reverse the flow direction

  5. Contact conductance between the face sheet and HP Layers of the radiator R56`=8.27E4W/K à R56=181W/K R67`=3.07E5W/K à R67=188W/K R79`=171W/K à R79=209W/K

  6. Cases selected for simulation

  7. Results of cold cases

  8. Cold case1: BYPR=+75+15+15+15 Tset=258K FR=2g/s Cold orbit heaters Pre-heaters

  9. Cold case2: BYPR= +75-15_0+15 Tset=258K FR=2g/s Cold orbit heaters

  10. Cold case3: BYPR= -75_0_0-15 Tset=258K FR=2g/s

  11. Comparison of the cold orbit results

  12. Summary 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.

  13. Hot cases

  14. BYPR=+75-15-20-15 Tset=293K FR=2g/s subcoolings

  15. BYPR=+75-15-20-15 2 phase

  16. BYPR=+75-15-20-15 Tset=293K FR=4g/s Pre-heaters

  17. Summary 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

  18. Future work • Building and debugging the TTCS v1.0 • modified the length and volume to the latest loop layout • More reliable accumulator model. • Involving of the tracker people in modeling is started, and to be strengthened.

  19. Thank you

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