Advanced Structurally Embedded Thermal Spreader Oscillating Heat Pipe Micro-Gravity Flight Experiment

Innovations in pulsating heat pipes: From origins to future perspectives

“…The Japanese team lead by Professor Nagai and supported by JAXA, has been the first to test an FPPHP on orbit with long duration experiment starting from 2012 showing that the thermal performance is comparable to the one obtained with ground tests without any degradation for almost four years [101]. Recently, the American Airforce Research Laboratory tested a FFPHP without check valves on orbit for 780 days, confirming that the PHPs experienced no significant hysteresis effects and performed successfully in six-week long continuous operation [102] [103].…”