At laboratory stage but promising:
Heat pumps without compressors: Fraunhofer advances electrocalorics
"Novel concept: solid-state #HeatPumps based on #electrocaloric materials that do not run on harmful #refrigerants and could potentially be more efficient than compressor-based systems."
Sonnenseite · Heat pumps without compressors: Fraunhofer advances electrocalorics - Sonnenseite - Ökologische Kommunikation mit Franz AltHighly efficient solid-state heat pumps without compressors – that is the vision of Fraunhofer researchers. With the recent completion of the ElKaWe