Refrigeration without Electricity
The Dutch company SoundEnergy has developed an industrial thermoacoustic energy converter that uses excess heat to cool air or water without additional power sources..
The device, named THEAC-25, is based on a thermoacoustic effect. After integration into the infrastructure of an enterprise or production line, the system converts the incoming heat energy into sound waves, with the help of which it then cools the air or water. The outlet temperature can reach -25 °C. Heat input to one side the device leads to the production of 25 kW of cold on the other.
Unlike traditional air conditioning systems, the new development does not use chemical fluids (refrigerants) that are harmful to the environment, but only argon gas. It also lacks mechanical moving parts and expensive materials. The internal working pressure is 12 bar and the noise level is – 70 dBA.
The service life of the system is up to 30 years. At the same time, the equipment does not require regular maintenance, but only an annual check..
In autumn and winter, the converter can be used to power the heating system, since its panels can heat up to a temperature of 40 °C.
The developers say the device will allow businesses to cut their overall operating costs by reduce electricity consumption and gas.
Not a less interesting solution was recently presented by American engineers who created a new type of durable wood material for passive cooling of buildings, the temperature of which is always 5-6 °C below ambient air.
text: Ilya Bauer, photo: SoundEnergy