"To help feed the country’s population, an inventor, Toufic Hamdan, created a commercial bakery to bake bread in solar ovens. The startup “Partners With Sun” has installed a solar convection oven on the bakery’s roof. The Solar Oven uses large silver mirrors to capture and magnify the sun’s rays to build heat. The heat is transported by a transfer fluid which is then used to help operate a convection oven, allowing it to reach a baking temperature of between 300 and 400 Celsius. The heat is used directly in food and beverage production. " Baking Bread in a Solar Oven | Happy Eco News
According to the company website, “The Solar Oven cuts up to 80% of the bakery’s fuel bill.”
This is a really interesting idea, however, it would be good to see how efficient it is. I would think going from light>mirrors>liquid>oven>bread is less efficient than going from light>solar panel>oven>bread.
Either way, this is a creative design, and could be used for other applications. Could a house be heated in the same way?
Photovoltaic solar panels have quite poor efficiency, ~20% in good operating conditions. I wouldn't be surprised that the light>mirrors>liquid>oven>bread solution has a superior efficiency.
Interesting, I didn't know that. It would be great to see some numbers for this.
How well does it operate during sub-optimal conditions? Electricity can be stored in a battery, so you can spread your power out over time. I would expect some flexibility in this, since heat doesn't instantly dissipate, but if conditions remain poor for an extended period, I would think this would be much less resilient.
The tech. has been around since the 70s and used for heating and hot water also.
radiant hot water heating is a thing, industrial compost pipes often has heat transfer tubing in it for free heat and hot water.