what you’re describing is an oven with a heat pump. industrial-grade ovens like this exist, but they don’t really exist in the home appliance market as the amount of energy recaptured at that scale would be negligable. it’s easiere (and cheaper) to make ovens more energy efficient in other ways.
there are a number of other home appliances (washers, dryers, and dishwashers), however, which use inverter heat pumps to recapture/recycle heat, thus increasing energy efficiency by quite a lot.
Digestive_Biscuit@feddit.uk 3 days ago
Not as fancy as heat pumps but our kettle boils one cup at a time and the boiling chamber is under the water tank. Some of the wasted energy goes to warm up the water in the tank meaning less energy is needed for the next cup. It’s probably not that efficient but it’s better than nothing.
blave@lemmy.world 3 days ago
Considering that heat rises, I’d be pretty surprised if the heating element for an electric kettle was anywhere but beneath the tank. It wouldn’t work very well otherwise, unless you used a much more expensive method of heating it all around., But even then, there would still be heating elements underneath.
A good way to improve efficiency there, would be to insulate the tank to reduce heat dissipation in the first place.
Digestive_Biscuit@feddit.uk 2 days ago
I don’t think I explained very well. It has two tanks. Storage water tank and a boiling tank which is under the storage tank. It draws water into the boiling tank which is 1 cup size. Once it’s hot it shoots the water out of the spout into the cup. Water from the storage tank fills the boiling tank.
blave@lemmy.world 2 days ago
Oh, I see. Yeah, I misunderstood it this side. Thanks for clearing that up.