A regenerative elastocaloric heat pump

Kurt Engelbrecht, Dan Eriksen, Stefano Dallolio, Janez Tušek, Nini Pryds

Research output: Contribution to journalJournal articleResearchpeer-review


A large fraction of global energy use is for refrigeration and air-conditioning, which could be decarbonized if efficient renewable energy technologies could be found. Vapour-compression technology remains the most widely used system to move heat up the temperature scale after more than 100 years; however, caloric-based technologies (those using the magnetocaloric, electrocaloric, barocaloric or elastocaloric effect) have recently shown a significant potential as alternatives to replace this technology due to high efficiency and the use of green solid-state refrigerants. Here, we report a regenerative elastocaloric heat pump that exhibits a temperature span of 15.3 K on the water side with a corresponding specific heating power up to 800 W kg−1 and maximum COP (coefficient-of-performance) values of up to 7. The efficiency and specific heating power of this device exceeds those of other devices based on caloric effects. These results open up the possibility of using the elastocaloric effect in various cooling and heat-pumping applications.
Original languageEnglish
Article number16134
JournalNature Energy
Number of pages1
Publication statusPublished - 2016


  • Devices for energy harvesting


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