This new “subcooled flow boiling” technique results in greatly improved heat transfer effectiveness compared to other approaches and could be used to control the temperatures of future systems in space. This process is greatly ameliorated when the liquid supplied to the channel is in a subcooled state (i.e., well below the boiling point). This process efficiently transfers heat by taking advantage of both the liquid’s lower temperature and the ensuing change of phase from liquid to vapor. The boiling liquid forms small bubbles at the walls that depart from the walls at high frequency, constantly drawing liquid from the inner region of the channel toward the channel walls (see figure below). As these devices heat up, the temperature of the liquid in the channel increases, and eventually the liquid adjacent to the walls starts to boil. The FCBE’s Flow Boiling Module includes heat-generating devices mounted along the walls of a flow channel into which coolant is supplied in liquid state. Hollander Family Professor of Mechanical Engineering, has developed the Flow Boiling and Condensation Experiment (FBCE) to enable two-phase fluid flow and heat transfer experiments to be conducted in the long-duration microgravity environment on the International Space Station.Ĭomponents of the Flow Boiling and Condensation Experiment (FBCE) (Image: NASA Glenn Research Center) What’s more, this same technology may make owning an electric-powered car here on Earth easier and more feasible.Ī team led by led by Issam Mudawar, Purdue University’s Betty Ruth and Milton B. These systems-including nuclear fission power systems for missions to the Moon, Mars, and beyond vapor compression heat pumps to support Lunar and Martian habitats and systems to provide thermal control and advanced life support onboard spacecraft-will require advanced heat transfer capabilities to execute the thermal control required.Ī team sponsored by NASA’s Biological and Physical Sciences Division is developing a new technology that will not only achieve orders-of-magnitude improvement in heat transfer to enable these systems to maintain proper temperatures in space, but will also enable significant reductions in size and weight of the hardware. Numerous future NASA space missions will involve complex systems that must maintain specific temperatures to operate. The charging cable is cooled internally by dielectric fluid using subcooled flow boiling. Purdue University’s Electric Vehicle charging facility can charge a car in five minutes.
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