loop

The Capillary Pumped Loop (CAPL) Flight Experiment will provide a microgravity test of a full sized prototype
for a capillary pumped thermal control system. This two-phase system utilizes an ammonia working fluid to
transfer large amounts of heat over long distances at nearly constant temperature. Capillary pumped systems will
be used for thermal control on Earth Observing System (EOS) satellites and other future missions. CAPL is
sponsored by NASA's Goddard Space Flight Center EOS project and will fly as a Hitchhiker payload on the space
shuttle.