Last year, in the the spring, I met Steen Carlsen. He has travelled extensively in Asia and East Africa, including Zambia, which is why I came to hear of him. Steen has a background in
electronics and electrical engineering and we have had many interesting conversations already. Unfortunately, Steen is terminally ill, and is in a hurry to realize a few projects before it is too late. When he showed me his solar oven project, I suggested we tell about it here, in the hope that his detailed description of this simple and crucial technology could reach more people who would benefit greatly.
The report contains rare and very detailed technical details on the principles of thermal conductivity. It’s a must read for anyone who needs to manage temperatures in any system really. It’s an exercise in capturing, confining, and not wasting thermal energy.Considerations, design calculations, construction, test and evaluation of a cavity walled solar oven
A prototype has been built and tested in Aarhus, Denmark , where it reached a maximum temperature of 83.0 degrees Celsius on August 13, 2022. The test of the oven complied well with the theoretical calculations. Based on calculations, test results, and the lessons learned, I believe that the temperature of a subsequent prototype can be increased by another 5–15 degrees Celsius. The design, the technology, the choice of materials and required tools have been aimed to be adapted to the conditions in refugee camps. I have tried to use either recycled or cheap lightweight materials. I have strived to make a design that can be made by a skilled handyman.
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