2 ms·
maybe vacuum insulated panels. A big thermos would be much more challenging, though there are already long vacuum bottles/tubes used as solar cookers.
by jacknews 1y ago
maybe vacuum insulated panels.
A big thermos would be much more challenging, though there are already long vacuum bottles/tubes used as solar cookers.
- kragen 1y agoI have in fact cooked eggs at night by running water over them that was heated in such vacuum-insulated-tube collectors, then held in an insulated tank. This used to be an economical way to get hot water when PV was more expensive.