I am quite convinced that supersonic compression represents a serious market potential for CO2 applications and equivalent.
- But do you think this is a technology that can be deployed, say in the short/mid term, for lower molecular weight applications; e.g. natural gas (say in the 17-22 MW range) or even much lighter gases (such as hydrogen)?
- What would you expect as limitations / challenges for extending the range of applications to lower MW?
I would like to quote the following article:
and the following table:
Gas Molecular Weight Mach 1 (ft/sec)
Hydrogen 2.0 4290
Methane 16.0 1440
Ammonia 17.0 1410
Water (water vapor or steam) 18.0 1400
Air 28.9 1130
CO2 44.0 880
As a matter of general discussion and being quite ignorant on this new technology, I suspect that when going toward lower MW - the following problems will become even more acute:
- Increase of peripheral speed.
- Increase of volume flow / capacity thereby increasing diameter / frame size.
For example - as far as tip speeds are concerned, here are some of the achieved performance:
Tip speed for CO2 (MW 44) : 1600 ft/s
Tip speed for Air (MW 28.9): 2100 ft/s
I am curious about which material would be capable to withstand 2100 ft/s and above while lighter MW are envisaged?
I will be glad if you can share your thoughts.