Cryogenic processor with Perlite insulation
Cryogenic processor with Perlite insulation
(OP)
I am designing a cryogenic processor for size of 300x300x600mm rectangular with maximum efficiency.
Foam insulation will be very inefficient and other MLI and High vacuum insulation will be very costly.
So i was thinking of using 150mm thick insulation (annular section filled with expanded perlite. just my concern is whether vacuum is needed after loosely filled perlite inside the section or air tight section is fine.
or any other option for insulation.
Foam insulation will be very inefficient and other MLI and High vacuum insulation will be very costly.
So i was thinking of using 150mm thick insulation (annular section filled with expanded perlite. just my concern is whether vacuum is needed after loosely filled perlite inside the section or air tight section is fine.
or any other option for insulation.





RE: Cryogenic processor with Perlite insulation
Of course square is a very structurally inefficient shape for vacuum service.
Using vacuum as insulation is very inexpensive, just build a good shell and pump it down.
The filler helps the insulation when it acts to block radiant heat transfer in the vacuum space.
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P.E. Metallurgy, Plymouth Tube
RE: Cryogenic processor with Perlite insulation
Thermal conductivity values and total heat transfer coefficients for perlite powder in vacuum and slight N2 pressure my be found in Perry Chem Engg Handbook in the subsection for cryogenic insulation.
RE: Cryogenic processor with Perlite insulation
any engineering references for designing this type of box or vessel in cryogenics.
Below link is of Cryocart from Chart, i want something similar.
https://www.princetoncryo.com/cryocart.html
Thanks in advance.
RE: Cryogenic processor with Perlite insulation
RE: Cryogenic processor with Perlite insulation
TTFN (ta ta for now)
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