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Solar Cooker

    Cooking in Sunshine   

India is blessed with abundant sunshine. It receives 5,000 trillion kilowatt hours per year of solar energy. Several solar technologies have been developed to harness this renewable form of energy. The solar cooker is an example of a solar thermal technology.

The different types of solar cookers includes the box solar cooker for a family of 4 to 5 members, a community solar cooker for about 40 people and the solar steam cooking system that can cook for people of about thousand.

The world's largest solar steam cooking system, used to cook for around 15,000 people per day, has been installed at a temple in Tirupathi, Andhra Pradesh, and is functioning satisfactorily since October 2002.

A solar box cooker is a slow cooking device useful for small families. It can cook four dishes at a time and can save around three LPG cylinders in a year if used regularly. The solar cooker is the most decentralised and compact system possible.

One can use it in a place cut off from the outside world – indeed in Kargil where our Jawans are using it. A total of around 530,000 box solar cookers
have been sold in the country.

The Gujarat Energy Development Agency (GEDA 1979) calculates that the use of solar cookers by about 2000 families for 10 years would mean a saving of Rs 3.6 million in terms of reduced firewood consumption, or Rs. 100 million worth coal or Rs. 8.55 million worth kerosene (as per 1979 prices).

Do-It-Yourself: Build a Solar Cooker

Reflective Panels

  1. Draw the outline of the reflector segment and cut the 4 cardboard segments.

 

2. Spread the glue evenly over the cardboard segments and cover them with Aluminum foil with the shiny side up. Avoid wrinkles and creases as this would decrease the efficiency of the reflector.

3. Arrange the panels keeping a 2mm space between them as shown below. The wide sections alternating with the narrow sections. Use a duct tape to join them. Flip the panel on the other side and reinforce the joint.

Insulated Box

1. Fasten the cardboard to the bottom of the reflector by its flaps using the duct tape. Be sure the box is centered.

2. Shred some newspaper and put it into the gaps between the box and the reflector

Baking Chamber

1. In a plastic container mix black tempera paint with one teaapoon of white glue and two teaspoons of water.

2. Apply two coats of this black paint evenly over the inside of the aluminium foil loaf tin and set it aside to dry.


3. Find painted tins that fit exactly in your baking chamber.

Test It

1.Preheat the painted tins inside the solar cooker before cooking with them.


2. Place the baking chamber into the bottom of the reflector.


3.Prop up the reflector with the help of bricks etc to keep it at right angle to trap more heat from the sun.

 

 

Your dishes are ready !!!

For solar recipes www.solarshopee.com/solar/some_recipes.htm
Dr Ashok Kundapur on Solar cooker http://ashokk_3.tripod.com

 

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Cooking in Sunshine