Elastocaloric Effect

Question: Elastocaloric effect, which was recently in news, is related to?
(a) Cooling
(b) Heating
(c) Food calories
(d) None of the above
Answer: (a)
Related facts:

  • Recently researchers have shown that elastocaloric effect ultimately leads to cooling. This is an important research published in the Journal Science.
  • The elastocaloric effect, if harnessed, may be able to do away with the need of fluid refrigerants used in fridges and air-conditioners.
  • Nowadays everybody knows that the fluids like Chlorofluorocarbons (CFCs) are susceptible to leakages, and can contribute to global warming.
  • Caloric effects refer to the entropy changes when applied external fields, such as stress, electric or magnetic fields, change.
  • It should be known that there is a strong demand in the world for efficient and environmentally friendly refrigeration technologies. Therefore the materials with giant caloric effects, including elastocaloric, have been widely investigated.
  • Elastocaloric effect can be perceived in rubber bands, when rubber bands are twisted and untwisted, it produces a cooling effect.
  • Elastocaloric effect is defined as the isothermal change of entropy or the adiabatic change in temperature of a material subjected to a uniaxial strain.
  • Basically, elastocaloric materials are solids capable of stress-induced reversible phase transformations during which latent heat is released or absorbed.


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