Using Sound Waves to Heat the House During Winter Becoming More Advanced

The past year has seen energy efficiency become one of the key issues, and air conditioning has been one of its major players. Thermoacoustic heat pumps, a temperature exchange system that works differently than traditional heat pumps, provides great promise in this field.

This technology has been around us since the mid-18th century but only in mid-last century have efforts begun to turn this scientific knowledge into practical use.

It is believed to have the potential to reduce the current CO2 emissions associated with air conditioning systems by up to 80%.

French startup Equium has taken the lead in developing this technology through a loudspeaker that operates at volumes between 10 and 30 dB. It changes the density of the gas (helium) in its nucleus and alters the temperature, making air conditioning more efficient.

The Netherlands company Blue Heart Energy is also developing a similar device, designed as a transition to the current heat pumps used in some air conditioning systems.

It is also intended for use in conjunction with electrical self-generation systems such as solar panels and is expected to be released for home use this year.

These advances in air condensing are in addition to December’s discovery of the ionocaloric refrigeration cycle, an energy-change process based on ions to oscillate matter between solid and liquid states.

Though we find ourselves in a crisis that has lent greater urgency to energy efficiency research and innovation, this progress would not have been possible without many decades of work.

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