Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Liquid helium - Siemens-cycle only?

  1. Nov 27, 2014 #1
    Why can't I reach 4K with the Siemens-cycle?
  2. jcsd
  3. Nov 28, 2014 #2


    User Avatar
    Staff Emeritus
    Science Advisor


    It appears that He liquification systems use the Siemens cycle upfront in the high temperature range, and the last stage is Hampson-Linde cycle.

    It would be worthwhile to find the original patents - Siemens cooling cycle (patented by W. Siemens 1857) and the Hampson-Linde Patent.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook