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Dish Type Solar Cooker |
Solar Mass Cooking
:: Dish Type Solar Cooker
(SK-14)
|
The concentrating type parabolic dish solar cooker will be useful for individuals in rural as well as urban areas and also for small establishments like dhabas, tea shops etc. The solar cooker has an aperture diameter of 1.4 meter and a focal length of 0.28 meter. The reflecting material used for its fabrication is anodized aluminium sheet that has a reflectivity of over 75 %. The tracking of the cooker is manual and so has to be adjusted in 15 to 20 minutes during the cooking time. |
It has a delivery power of about 0.6 KW that can boil 2 to 3 liters of water in half an hour. The temperature achieved at the bottom of the vessel could range from 350 to 4000C which is sufficient for roasting, frying and boiling. A cooker with about 40% thermal efficiency can meet the needs of around 15 people and can be used from one hour after sunrise until one hour before sunset on clear days. It can be easily dismantled and assembled. and therefore can be transported anywhere in the country. It can also be placed at a convenient level for its users.
The cooker can save up to 10 LPG cylinders a year on full use in small establishments. The metallic structure reflecting sheets may, however, have to be replaced once in 5 years.
The major components of the cooker are as below:
- Reflecting bowl: It is a parabolic dish made of reflecting sheets supported on suitable rings for holding them in a fixed position. The sheets will be joined together in such a way that they automatically form the parabolic shape. The structure and frame of the bowl will be so strong that the reflectors do not get deformed while turning in various directions.
- Reflecting stand: It is made of mild steel with powder coating for battery durability. The stand is designed in such a way that the reflector can rotate 3500 around the horizontal axis passing through the focus and the centre of gravity. It should also be able to rotate around the vertical axis so as to adjust the cooker in the direction of the sun.
Indicative Cost:
- Rs.8,500/- approx. with imported reflectors having reflectivity of above 90%. .
This includes the cost of accessories like pressure cooker, cap, hand gloves, and goggles, cooker manual, packing etc. The transportation may however cost extra. The pay back period is 2 to 3 years depending on the extent of use and place of utilization.