Title of Presentation: Miniature
Primary (Corresponding) Author: Jentung Ku
Organization of Primary Author: Laura Ottenstein, Thai Pham, Donya Douglas
The MLHP Breadboard has demonstrated excellent performance in laboratory and thermal vacuum environments. The loop started successfully every time with heat loads of 2W to 50W to either one or both evaporators. The loop operated steadily with heat loads of 2W to 130W. The TECs could maintain the loop operating temperature within 0.5K of the desired set point temperature at all power levels and all sink temperatures, and could save more than 50% of the control heater power when compared to traditional electrical heaters. The loop could adapt to rapid changes in the evaporator heat loads or condenser sink temperatures. The un-powered evaporator would automatically share heat from the other powered evaporator, thus eliminating or reducing the supplemental heater power needed to maintain the temperature of the un-powered instrument. The Thermal Loop technology has achieved a technology readiness level of 5.
The MLHP combines the functions of variable conductance heat pipes, thermal switches, thermal diodes, and the state-of-the-art LHPs into a single integrated thermal system. It retains all the performance characteristics of state-of-the-art LHPs and offers additional advantages to enhance the functionality, performance, versatility, and reliability of the system. In addition, steady state and transient analytical models have been developed, and scaling criteria have also been established.