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Multi-Evaporator Miniature Loop Heat Pipe for Small Spacecraft Thermal ControlUnder NASA s New Millennium Program Space Technology 8 (ST 8) Project, Goddard Space Fight Center has conducted a Thermal Loop experiment to advance the maturity of the Thermal Loop technology from proof of concept to prototype demonstration in a relevant environment , i.e. from a technology readiness level (TRL) of 3 to a level of 6. The thermal Loop is an advanced thermal control system consisting of a miniature loop heat pipe (MLHP) with multiple evaporators and multiple condensers designed for future small system applications requiring low mass, low power, and compactness. The MLHP retains all features of state-of-the-art loop heat pipes (LHPs) and offers additional advantages to enhance the functionality, performance, versatility, and reliability of the system. An MLHP breadboard was built and tested in the laboratory and thermal vacuum environments for the TRL 4 and TRL 5 validations, respectively, and an MLHP proto-flight unit was built and tested in a thermal vacuum chamber for the TRL 6 validation. In addition, an analytical model was developed to simulate the steady state and transient behaviors of the MLHP during various validation tests. The MLHP demonstrated excellent performance during experimental tests and the analytical model predictions agreed very well with experimental data. All success criteria at various TRLs were met. Hence, the Thermal Loop technology has reached a TRL of 6. This paper presents the validation results, both experimental and analytical, of such a technology development effort.
Document ID
20110015223
Document Type
Conference Paper
Authors
Ku, Jentung
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Ottenstein, Laura
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Douglas, Donya
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Hoang, Triem
(TTH Research, Inc. Clifton, VA, United States)
Date Acquired
August 25, 2013
Publication Date
January 4, 2010
Subject Category
Fluid Mechanics And Thermodynamics
Report/Patent Number
GSFC.CP.4680.201
Meeting Information
Meeting: Multi-Evaporator Miniature Loop Heat Pipe for Small Spacecraft Thermal Control
Location: Orlando, FL
Country: United States
Start Date: January 4, 2010
End Date: January 7, 2010
Distribution Limits
Public
Copyright
Public Use Permitted.
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