Revolutionary crystals pave way for greener cooling solutions
Scientists have developed a new type of cooler, distinguished by using special "plastic" crystals that could replace the traditional cooling systems used in refrigerators and air conditioning units.
A team from Deakin University in Australia, led by Dr Jenny Pringle, has developed new crystals that could revolutionise cooling technology. These "plastic crystals" (OIPC) can absorb heat when subjected to extreme pressure, potentially leading to the development of more eco-friendly refrigerators and air conditioning systems.
Traditional cooling devices operate on the principle of liquid circulation, which absorbs heat through a cycle of evaporation and condensation. This technology is not without faults, as it can cause leaks that release substances into the atmosphere, potentially contributing to the greenhouse effect. The newly developed crystals could serve as an alternative to these liquids.
Under high pressure, the crystal molecules transition from random orientation to an ordered lattice. When the pressure decreases, the crystals return to a disordered state, absorbing heat and consequently cooling the surroundings.
Previous research into "pressure-based" cooling did not produce satisfactory results because the materials operated at impractical temperatures. The crystals developed in Australia operate in a range from approximately -37°C to 10°C, which aligns well with the requirements for domestic refrigerators and air conditioning systems.
Technological challenges
The technology is currently in the laboratory testing phase. The required pressures are very high, comparable to those found thousands of metres underwater. Additionally, with repeated use, the crystals may lose their ability to absorb heat as their structure becomes increasingly strained. Nonetheless, ongoing research into this technology could, in the future, contribute to the development of more eco-friendly cooling solutions.
