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. [...]
[...] The following conclusions are drawn based on the work: 1)The maximum temperature achieved in the system is 264 and it can be achieved in just 50 minute of time, for 2 kg mass only in good sunshine condition. 2)The total cost of the system is Rs 15,310. It is estimated that the solar cooker can effectively utilize 4.714 kWh energy for 8 kg of water, and can be used for around 6 hours in a day. Annual saving in Rupees is [...]
[...] The cooker has to be of dark black to absorb the sun's radiation and placed at the focal area for maximum efficiency cookers, solar stills, solar dryers etc. Thus, at the micro level, a solar cooker facilitates financial savings for the consumer, while at the macro level, it helps in conserving precious natural resources like fuel wood and helps in reducing the cost of fuels like disel or LPG. While talking about solar cooker, the common name comes to forward is flat plate solar cooker. [...]
[...] Normally in most of the parabolic solar cookers, the only tracking arrangement possible is around x-axis, but this type of parabolic cooker with parabolic concentrator can also be swiveled around y axis. In the twenty four hours the earth completes its one rotation about its axis In 24 X 60 minutes, time rotation, so for rotation time required will be 4 minutes. Therefore for turn, time required will be 16 minutes. As the sun is far away from the earth and also has larger diameter, turn does not matter so much, as still some rays will be concentrated on the cooker. [...]
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