<div dir="ltr">I was amused to see an announcement of a thermoacoustic heat pump  the other day:<div><br></div><div>  <a href="https://www.pv-magazine.com/2023/01/02/residential-thermo-acoustic-heat-pump-produces-water-up-to-80-c/">https://www.pv-magazine.com/2023/01/02/residential-thermo-acoustic-heat-pump-produces-water-up-to-80-c/</a></div><div><br></div><div>then an ionocaloric refrigerator announcement turns up this morning</div><div><br></div><div>  <a href="https://newscenter.lbl.gov/2023/01/03/cool-new-method-of-refrigeration/">https://newscenter.lbl.gov/2023/01/03/cool-new-method-of-refrigeration/</a></div><div><br></div><div>It seems that you won't recognize your air conditioner in a few years.</div><div><br></div><div>-- rec --</div></div>