Noel Bourke has tried many solar oven designs over many years and, being a Joiner/Patternmaker by Trade, have developed my patio model which he calls a Sola Kooka. Its cooking chamber has a yearly average temperature of 167°C. It reaches 200°C constantly (212°C max) with all reflectors focused in high summer here in Western Australia and fries foods because it gets so hot. Noel has failed to find another "passive" (black collector) that attains the same hight temperatures that this model reaches for its size. He describes it as very user friendly as it sits on a free moving trolley, and is rapidly being taken up by people who live in the hotter country areas of Australia as well as the city dwellers. The design has been Patent applied for in many countries and can be made in any width (up to 2350mm wide) without compromise of user friendlyness. Noel makes them wider for less sunlit countries like England for example, (1200mm width) with the standard width for Australia being 750mm wide. It can have an electric, gas, or flamed fire as a back up, as the design is so useful for multi-tasking.
For a solar cooker to gain wide use, Noel says it has to be user friendly, get hot and retain the heat, be inexpenve to build. and be durable. He asserts that this design gets very hot quickly and retains and replaces heat more efficently than any other passive solar oven for its collection area. The design can be made for less in developing countries, with basic construction for costs, yet not compromise its user friendly facts, or its high reaching temperatures, or can be made from more durable qualities (steel) for the more affluent western countries.
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