KaiserPingo January 25, 2019 07:02 AM Great ! watersworm January 25, 2019 07:24 AM Indeed a potential Great world-changer ! Let's hope it'll be cheaply downscaled myale January 25, 2019 08:50 AM Did I miss the data - i.e. does 1 degree of heat produce 1 degree of cooling? or how many kilo watts produce what cooling potential? - so if I take a room at 25 degree C can I cool a same size room to 0? WONKY KLERKY January 25, 2019 09:37 AM Errrrrr ... etc ...... Was this not done in 1950's in Brit (at least) military aircraft? (Not forgetting also, ye Vortex Tube used for heating). paul314 January 25, 2019 01:16 PM Any word on efficiency? How many watts across what kind of temp difference does it take to produces how many btu/hr of cooling? (Or whatever units you prefer)It's nice to hear that it doesn't use moving parts, but, for example, is that 25-kw number quoted the in or the out? guzmanchinky January 25, 2019 02:00 PM Aww man this is great news! toyhouse January 25, 2019 02:40 PM What an awesome development! Disruptive tech indeed but much needed. nigeltech January 25, 2019 02:58 PM WOW Douglas Bennett Rogers January 25, 2019 04:59 PM Doesn't look like a replacement for a home air conditioner but a replacement for an ammonia absorption unit. Needs a boiler or process heat to work. Both of these will work with solar thermal. PV's have about 90 % waste heat but at too small a thermal gradient. SatoruRyu January 25, 2019 05:24 PM While this is interesting an efficiency of 40% pales in comparison to absorption chillers whose coefficient of performance is almost double for single stage absorption chillers to 3.5 times higher efficiency in two stage absorption chillers. Evaporation is simply superior as a cooling function hence why it's favored.I will concede based upon basic material properties the thermoacoustic cooling system should theoretically have a longer lifespan and longer maintenance cycles. Yet, if they can't outright demolish the upfront pricing I don't foresee this becoming mainstream.