Heat Out • Robust operation – Vapor tolerant: secondary wick provides liquid from CC to evaporator • Reservoir is plumbed in line with the flow circulation. – Operating temperature depends on heat load, sink temperature, and surrounding temperature. – External power is required for temperature control. Limited growth potential
Heat pipe is a capillary two-phase heat transfer device. Why two-phase thermal system? Why capillary two-phase system? Typical Typical use use of of heat heat pipe: pipe: one one end end (the (the evaporator) evaporator) is is attached attached to to the the heat heat source source, and and the the opposite end (the condenser) to the heat sink.
Two Phase Systems | GSFC Thermal - NASA
The Heat Pipe is one of the most utilized systems in space applications for thermal management. "Heat Pipe" is the name given to a high performance heat transfer device which can transport heat at high rates and over relatively long distances with a small temperature difference.
heat pipes in a reactor system, there remains several key areas of development for this high temperature heat pipe technology before they can be used for flight missions. These areas are divided into four parts: fluid return under reduced gravity conditions, heat pipe to power conversion interface, heat pipe to reactor core interface, and long-life
7.0 Thermal Control - NASA
2010年7月2日 · Heat pipes are an efficient passive thermal transfer technology, where a closed-loop system transports excess heat via temperature gradients, typically from electrical devices to a colder surface, which is often either a radiator itself, …
The results indicated that the combination of liquid metal heat pipe cooling and surface transpiration or film cooling tended to mitigate the otherwise severe maximum leading edge surface temperatures expected on a SCRAMJET engine inlet
A pair of propylene Loop Heat Pipes has been designed, built, tested and delivered for use in cooling the 2 main Ocean Color Instruments for the Plankton, Aerosol, Cloud, ocean Ecosystem satellite, due to be launched by NASA in 2023.
FHMT | ASETS-II OSCILLATING HEAT PIPE SPACE FLIGHT …
The ASETS-II experiment is made of three low-mass, low-cost oscillating heat pipes (OHPs) and an electronics/experiment control box. The three primary science objectives of the experiment are to measure the initial on-orbit thermal performance, to measure long duration thermal performance, and to assess any lifetime degradation.
Advanced Structurally Embedded Thermal Spreader Oscillating Heat Pipe …
2021年8月31日 · The ASETS-II flight experiment accomplished its mission to demonstrate functionality, characterize behavior, and explore the predicted limits of operation of oscillating heat pipes (OHPs) in a long-term microgravity environment.
The Loop Heat Pipe (LHP) is a passive two-phase ther-mal control system that uses the latent heat of vaporiza-tion of an internal working fluid to transfer heat from an evaporator (the heat source) to a condenser (the heat sink). The circulation of the working fluid is accomplished by capillary pressure gradients in a wick with very small pores.