Speaker
Description
Heat switches are widely used in cryogenic systems and play an important role in controlling thermodynamic cycles and accelerating the cooling of cryogenic components, etc. Among them, the active gas-gap heat switch (AGGHS), as one of the mainstream heat switches, mostly uses activated carbon as the adsorption material. It desorbs/adsorbs helium, by heating/cooling the activated carbon, to realize the on/off state. Normally, a short response time, which is related to adsorption properties of the materials and the heating method of adsorption bed, is desired. In order to further shorten the response time and improve the performance of the heat switch, an active gas-gap heat switch using carbon nanotubes as the adsorption material is investigated. The heat switch at different filling mass of carbon nanotubes and charged amount of helium was tested and compared with the performance of the heat switch using activated carbon.
