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* Parvati
Solar Cooker *

Construction of Parvati solar cooker (Twelve sided) is given below

This is Modified Dual angled Funnel Cooker made in 12 sections. This is similar to DATS design of Teong H. Tan.There is one minor difference between design of these two cookers. Apperture size of Teong H. Tan's cooker is 36 inches while that of Parvaticooker is 24 inches and ratio of length of sides. Solar ray reflection of both the cookers is shown in Fig A and B. We have not done comparative study between these two designs so far.

Fig. A : DATS ( Teong H. Tan) | Fig. B : Parvati Cooker. |

Dimensions of single section are given in Fig.1. These dimensions are for cooker having rim diameter of 2 feet. For rim diameter of 3 feet and 4 feet multiply these dimensions by 1.5 and 2 respectively.

Fig1.

To simplify the construction we decided to make it out of single sheet of aluminum or cardboard instead of making multiple section and joining them together. Apart from simplifying construction this strengthened the cooker.

Take a rectangular sheet of dimension 24”
* 48”. Draw a semicircle of 24”
radius. Divide this semicircle into 12 equal parts by replicating 12 times the
drawing of single section. Complete drawing resembles as shown is fig 3. The
drawn portion is cut along the edge. You will have the sheet now as shown in fig
2.

Next you have to bend this to form solar cooker. First bend the “A” parts of all sections to the angle of 135 degrees with part “B”. Then bend part “B” of all sections to the angle of 165 degrees with Part “C”.

Now start bending all “C” parts on the inner side so that each “C” part makes an angle of 165 degrees with next one. After bending is complete join together two ends of “C” parts by using paper strip and glue. For aluminum sheet use nut bolt and connecting strips.

All “B” parts will form the lower cone while all ”A” parts will form the part of base. A circular disc of the diameter of 7" has to be fitted to bring together all “A” parts. For cardboard paste the ring. Then paste reflective paper or aluminum foil. For aluminum cooker aluminum disc has to be bolted. The photograph of aluminum disc bolted is shown in the photograph. This completes the construction of Cooker. The inner surface of aluminum cooker will need polishing and protective coating.

Parvati Solar cooker. We are selling 26" diameter Parvati solar cooker with fabricated rotating metal stand and hard anodized reflector. Price Rs 4399/- FREE SHIPPING within India.

Full size plans available. (Full size Plans of 24 sided 26 inch diameter cooker only printed copies available.Us$ 8 as printing and postage charges)

Parvati Green Tech Enterprises, Sahakar Nagar, Parvati Pune India Pin 411 009.

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