The GoSun's patented solar cooking technology can bake, boil or fry a meal using nothing but energy from the sun, even in clouds, wind and freezing conditions. Heating up to 280°C while staying cool to touch, the stove's performance is only made possible from a combination of ideal materials and clever engineering.
Let's take a look inside:
The core of GoSun Technology is with the vacuum tube cooking chamber, which absorbs light while acting as a perfect insulator. We think of it as a physics hack, one of thermodynamic’s only free lunches.
A perfect insulator? That’s right. Between the tube’s two layers of borosilicate glass (wiki link), is a pocket of beautiful nothing (AKA outer space). Heat requires a medium to transfer. Without a thermal bridge, the heat absorbed by the stove collects rapidly.
How is the heat absorbed? Great question! The internal face of the tube is coated in three layers of metal: aluminum nitride, stainless steel, and copper. Placed on the inside of the vacuum (away from your food), these three layers work in unison to trap both viable light and ultraviolet, allowing one to cook in a light overcast.
What is borosilicate glass? Borosilicate glass is known for its chemical and thermal resistance, making it a go-to choice for bakeware, LED lights, and lab equipment.
So this is high-tech, right? This technology is new but not cutting edge. GoSun founder and solar energy expert, Patrick Sherwin, got the idea while working with a solar vacuum tube water heater. The tubes used for solar hot water heaters have been known to last decades on roofs around the world.
Compound parabolic reflectors concentrate light from a variety of angles onto the cooking tube. This means that there's little need to re-adjust the stove while cooking and even diffused light (such as light going through clouds) can be focused on the tube.
Roland Winston invented the first compound parabolic concentrator (CPC) in 1974, a breakthrough technology in solar energy. His discovery has now been used extensively in solar energy collection, wireless communication, and biomedical research.
Solar cooking times vary but this chart will help you figure out what to expect when dealing with the weather.