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Manufacturing and testing of parabolic solar cooker

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  1. Abstract
  2. Introduction
  3. Solar energy for cooking applications
  4. Selection of solar collector
  5. Principal of working
  6. Tracking arrangement
  7. Tracking a parabolic curve
  8. Manufacturing
  9. Conclusion
  10. References

Solar cooking has been proved as the simplest, safest and the most convenient system for cooking food without using traditional fuels and heating up of the kitchen. A parabolic solar cooker works by reflecting solar radiation to a small area, where cooker or baking pot is located. The parabolic dish is supported on a stand which also incorporates a support at the focus for the cooker. A very high temperature at 150-200? C achieved at the focal area with manual tracking. The cooker has to be of dark black to absorb the sun's radiation and placed at the focal area for maximum efficiency. Over the past century, fossil fuels have satisfied most of our energy needs. These fuels were much cheaper and more convenient compared to alternative energy sources till the emergence of energy crises. The sun has produced energy for billions of years. Solar energy can be converted directly or indirectly into other forms of energy, such as heat and electricity. [1]

[...] Parabolic radius of 1150 found Figure 4.2 Parabolic length with Al sheet suitable for manufacturing a parabolic concentrator MANUFACTURING: Figure 5.1 Views Parabolic cooker Major Parts : - Hollow shaft - Grill with cooker support - Grill - Side friction plate - Friction plate - Supporting arm - Center Bar - Auminium plates - Supporting Plate all the circular rings and joining the ends of radius on the card board. Then the desired shape of supporting plate of MS material is achieved by using hammer. [...]

[...] The examples of concentrating type collectors are Scheffler's solar cooker, parabolic cooker as shown in the figure. temperature is achieved in the range of 200 to C. This is sufficient for roasting, frying and boiling[3] 2. SELECTION OF SOLAR COLLECTOR The solar energy can be used for the need of cooking. The range of temperature 2 Figure 2.1 photogragh of Parabolic cooker converting these light waves to heat energy and The drawback of Scheffler's cooker is that it requires continuous tracking and also it has high initial and maintenance cost. [...]

[...] where large quantity of food is to be cooked in a very short duration of time PRINCIPAL OF WORKING There are three main principles Figure 3.1 parabolic curve incorporated into solar cooking. These fundamental principles are Principal focus: - rays of the light parallel to possible the principal axis and incident upon the concave reflecting surface meet at a certain point after reflection. This point is called directing the greatest amount of the sun's light rays to the pot by means of reflection 3 principal focus of the concave reflecting focus. [...]

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