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Old Tuesday, April 06, 2010
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Default solar cooker

Write a note on solar cooker.

ANS:



* Solar cooker is a device that uses solar energy in the form of heat for cooking food.

* As shown in figure, solar cooker consists of a container box whose body is made up of nonconducting plastic or fibrous material and insulated from outside to prevent heat loss.

* A plane mirror is fixed on the top of the box inb such a way that it reflects sunrays into the box.

* Solar cooker contains small containers painted black externally to absorb heat.

* The box is covered with a glass-sheet to retain the heat inside due to greenhouse effect. This heat develops about 100-140°C temperature inside the box within 2-3 hours when placed in sunrays.

* This type of cooker can be used to prepare food items like rice, dal, pulses, vegetables,etc.

* ADVANTAGES

1. There is no combustion of fuel.

2. Maintenance is negligible.

3. It is pollution-free.

4. The natural taste of the food is maintained as it conserves all nutrients.

5. During the preparation of food no personal attention is needed.



* LIMITATIONS

1. Food cannot be cooked on a cloudy day or in absence of direct sunlight

2. It takes very long time for cooking.
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MZkhan (Monday, March 12, 2012), rmma (Thursday, September 01, 2011), SAMEYA AROOJ (Monday, November 10, 2014), Waqar Bangash (Wednesday, February 09, 2011)