Elastocalorics cooling?

[begreen]

This one is new to me. Has anyone been following this field?

The first part is intro to refrigeration the elastocalorics info starts at 6:05.

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[stoveliker]

In my understanding the longevity is problematic; the martensitic transition is never uniform, but always happens in domains. Given the unit cell volume (and symmetry) changes this introduces a lot of stress, and reversal often leads to grain boundaries that will become weak points as cycling goes on.

The argument of the UM professor (no hydrofluoro carbons) is valid, but is being met with other liquids.

Yet I think it's good that there is diversity in ideas so that magneto calorics gets a kick in the behind as they've struggled for decades with finding the right material (large hysteresis at the right temperature range and then often similar material longevity problems)

 

[stoveliker]

Also the need for a heavy mechanical structure (we're talking about straining materials after all) will eat into the lifecycle carbon budget by having a lot of metal processing up front as compared to conventional refrigeration.