Swift BAT Thermal Recovery After Loop Heat Pipe #0 Secondary Heater Controller Failure in October 2015 | Zendy

Michael K. Choi | Zendy

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Swift BAT Thermal Recovery After Loop Heat Pipe #0 Secondary Heater Controller Failure in October 2015

Author(s) -

Michael K. Choi

Publication year - 2016

Publication title -

7th international energy conversion engineering conference

Language(s) - English

Resource type - Conference proceedings

DOI - 10.2514/6.2016-4704

Subject(s) - set point , controller (irrigation) , swift , control theory (sociology) , materials science , thermal , environmental science , analytical chemistry (journal) , mechanics , chemistry , physics , thermodynamics , engineering , computer science , biology , astrophysics , control engineering , control (management) , chromatography , artificial intelligence , agronomy

The Swift BAT LHP #0 primary heater controller failed on March 31, 2010. It has been disabled. On October 31, 2015, the secondary heater controller of this LHP failed. On November 1, 2015, the LHP #0 CC temperature increased to as 18.6 C, despite that the secondary heater controller set point was 8.8 C. It caused the average DM XA1 temperature to increase to 25.9 C, which was 5 C warmer than nominal. As a result, the detectors became noisy. To solve this problem, the LHP #1 secondary heater controller set point was decreased in 0.5 C decrements to 2.2 C. The set-point decrease restored the average DM XA1 temperature to a nominal value of 19.7 C on November 21.

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