The application I have in mind is static, moving gas from a low
pressure system to a high pressure one. This is not a "low delta_p -
high flow" nor a "high delta_p - low flow" but somewhere inbetween,
closer to the latter. I am thinking of a standing-wave accoustic tube
with some kind of one-direction flow devices (Tesla valves) placed at
velocity nodes. Any other suggestions?
Violates conservation of energy, unless the gas is moving fast
Doesn't help. How did you get the gas to move in the first place?
Ionize the gas, and use magnetohydrodynamics to compress the stream
before it recombines and you lose your grip on the stream. Don't know
what you'd make the containment vessel out of, unless you have really
low pressures both before and after (like sub-1-Torr).
David A. Smith
Of course there has to be external energy input, not trying to break
any laws of physics.
Not necessarily, it can be a thermo-accoustic heat engine, but I am ok
with a vibrating membrane and linear motor if it can run maintenance
free for 10+ years.
I am trying to figure out if it's possible to build a refrigeration
system that is very close to a typical vapor compression system in
terms of refrigerating capacity, energy efficiency and overall size
but has close to zero moving parts (no friction, seals, bearings,
lubrication) and can run virtually maintenance free. This mainly
targets the motors, compressors and pumps. The cost is also a factor
The good old ammonia absorption cycle. I was looking into this a while
back to be powered with solar heat. Way too inefficient to be cost-
effective (COP 0.5 vs 3.2 for a commercial vapor compression system)
but it works if you don't have another choice, or got loads of free
waste heat available.
Polytechforum.com is a website by engineers for engineers. It is not affiliated with any of manufacturers or vendors discussed here.
All logos and trade names are the property of their respective owners.