4 ms·
You drill very deep shafts and move refrigerant up and down. It’s efficient but capital costs are huge. Usually it does not make sense economically without gove
by vbezhenar 5y ago
You drill very deep shafts and move refrigerant up and down. It’s efficient but capital costs are huge. Usually it does not make sense economically without government regulations.
- oblio 5y agoYou don't even need that. Up to circa -20C you can use a regular AC with an inverter and it would still work, albeit at reduced efficiency.