25 Apr '16, 2am

Solar grills that store the daylight sun for nighttime cooking:https://t.co/Oi8cZuLJrf

The wording of this article is a bit misleading. This grill as shown simply will not be able to cook non stop with 1 day's thermal storage. Given that: 1. At best on a clear day near the equator in mid-summer you will get 1 kW/m^2 of direct-normal solar insolation for the eqivilent of 11 hours (1 kW-h/m^2) and 2. An efficient cooking grill requires a flux of around 40 kW/m^2 to safely cook meats Then assuming the collector area is roughly the same as the cooking surface area (as it appears shown here. The slant will add a few percent more area, but let's keep the math simple, you can estimate from there), you can see that, in the best possible case, 1 day of charging will give you about 17 minutes of grilling time. (11 kW-h/m^2 / 40 kW/m^2 = 0.275 hr) It would be possible to store up 25 hours of grilling time with enough nitrate salt and good insulation, but it would take ...

Full article: http://inhabitat.com/wilson-solar-grill-stores-the-suns-e...

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