How cool would it be to have fans throughout a computer case like these Dyson fans with no blades that are silent yet, "amplify airflow from 15 to 18 times?" They could work on power supplies and graphics cards too. How about blade-less, silent fans on an XBox?
Cases today have options for up to 11 fans, not including the fans in the power supply and sometimes two fans on each graphics card, which can be up to four in a case now. That's potentially up to 20 fans. Can you imagine the noise from all those fans?
What's really cool about Dyson fans is that they don't have to be round. They can be elongated, which would be perfect for filling up the front with one fan that might be 120 mm wide yet 240 mm tall. Same with the top of the case.
I'd like to see some serious scientific air-flow testing on computer cases to eliminate hot spots, especially around GPU's and PSU's. That way we're guaranteed great air-flow where we need it most. I like removable dust filters too - dust is a real problem where I live.
These Dyson fans are really expensive though but, maybe something can be done about that.
Bladeless fans would be... Compressors? No wait, the turbine in the compressor still uses a fan...
Either way, most decent fans you get nowadays are quite silent. Cooler Master Sickleflow fans are remarklably silent with a 19dB audible noise. High airflow fans like the Turbine Master aren't too quiet, but they blow impressively (insert sexual joke here).
Cooler Master MegaFlow fans are pretty decent too, with 19dB's and a 110CFM air movement, it's not a bad investment for a case fan. Too bad most cases won't accept a 200mm monster.
bladeless fans uses hidden fan-like in their base units, by channel these forced air flows through the design funnel, creates a venturi effect to push air.... noise is still inevitable... but it is definitely safer around children....
This post is old at this point, but the only way to really create airflow without a fan would be with a dual bellows system. A motor could lift one bellows to inflate it, while depressing another to exhaust air into the case. But to arrive at 75 cfm, say, with two 1.5 x 3 in. bellows the motor would have to go through about 85 inflate/deflate cycles per minute. On the plus side, you could install them anywhere in the case and port in the intakes/outputs where you wanted.
The only real fanless air pumps that I know of are pond pumps that work by oscillating a diaphragm at high speeds in an electromagnetic block. While low wattage, they are heavy and at least as big as a PSU. They're mostly low volume/high pressure though.
Best solution: reverse a central vacuum line and plug it into your computer.