What does the reflector do in a solar cooker?
Large reflectors are used to absorb sunlight and then focus it on a small area. The power of the sun’s rays striking the earth can produce energy levels of up to a kilowatt on each square meter of the planet’s surface. This is the equivalent of just half the energy output of a modern electric hot plate.
How hot can a parabolic solar cooker get?
400 degrees F
Box cookers can reach up to 300 degrees F (150 degrees C) [source: SHEI]. That’s hot enough to safely cook meat. A parabolic cooker can get even hotter, up to 400 degrees F (204 degrees C), which is hot enough to fry food or bake bread.
Is used as a heat reflector in solar cooker?
The mirror reflects the heat energy in a confined area and increases the net input energy to the solar cooker.
What are the advantages of a parabolic solar cooker?
There is no cost for solar radiation. Using parabolic, box, or panel cookers means no gas or electricity costs. They are easy to maintain and just as easy to build. With a little planning and some basic mathematical calculations, anyone can own their own solar cooker.
What is the best reflective material for a solar cooker?
Three different reflective material had used for development of solar cookers. Rice, egg and potato had cooked by these solar cookers. Mylar tape is the best reflective material from three cookers.
How do parabolic solar cookers work?
Parabolic solar cookers use a parabolic-shaped reflector to direct sunlight to a small area in order to generate heat for cooking. They are able to reach high temperatures, 350 °C (662 °F) or higher, which allows them to be used for grilling and frying.
How long does it take to cook with a parabolic solar cooker?
The time taken to cook will depend upon the type ;of the food, time of the day and solar intensity. However, the time taken to cook some of the dishes in a solar cooker is as follows : Rice (45 minutes to one hour), vegetables(about one to two hours), black gram and Rajma (about two hours), and cake(one hour).
What are the disadvantages of a parabolic solar cooker?
Disadvantages of solar cooker
- The solar cooker cannot be used at night and during cloudy weather.
- It takes more time to cook food.
- The direction of the solar cooker is to be changed continuously towards the direction of the Sun.
- Solar energy is not available uniformly all the time and at all places.
What are the disadvantages of the parabolic cooker?
The single biggest drawback to a parabolic cooker is the need to adjust the angle and direction of the cooker more frequently (as compared to other styles of cookers) for maximum cooking efficiency.