What is the shape of collector plate in solar cooker?
Parabolic trough This type of collector is generally used in solar power plants. A trough-shaped parabolic reflector is used to concentrate sunlight on an insulated tube (Dewar tube) or heat pipe, placed at the focal point, containing coolant which transfers heat from the collectors to the boilers in the power station.
What is the diameter of dish of point focusing collector?
The collector consists of a 6.7-m diameter, fully (2-axis) tracking parabolic dish, which focuses sunlight into a cavity-type absorber. The absorbed thermal energy is carried away by an organic (petroleum based) liquid, named Therminol 66. The reflector consists of a toric parabola (Fig.
What is a solar box type cooker?
Box-type solar cookers consists of an insulated box, metallic cooking pots inside the box, double glass lid on the cooking tray, and a reflecting mirror fitted on the underside of the lid of the box. The heat is absorbed by the blackened surface and gets transferred to the food inside the pots to facilitate cooking.
How do you make a solar cooker with a box?
DIY Solar Oven
- Use a box knife or sharp scissors to cut a flap in the lid of the pizza box.
- Cover the inner side of the flap with aluminum foil so that it will reflect rays from the sun.
- Use clear plastic wrap to create an airtight window for sunlight to enter the box.
Which type of collectors are used in solar cooker?
The primary elements of the solar cooking system are: High temperature solar collector consisting of a non-tracking concentrator with evacuated tubular absorber.
What is cylindrical parabolic collector?
It is formed by curved mirrors, concave channel shaped that concentrates its radiation over a pipeline that carries oil with high temperatures. This means they need to reach temperatures above boiling, then they are used in industrial plants dedicated to the generation of electricity. …
What is aperture area in solar collector?
Aperture area is the area over which the solar radiation enters the collector. Absorber area is defined as the dimensions of the absorber. For unglazed flat plate collectors the gross area, the aperture area and the absorber area are the same.
What are the parts of a solar cooker?
Important parts of a box type solar cooker
- Outer Box: The outer box of a solar cooker is generally made of G.I. or aluminum sheet or fibre reinforced plastic.
- Inner Cooking Box (Tray) : This is made from aluminum sheet.
- Double Glass Lid: A double glass lid covers the inner box or tray.
How does a solar box cooker work?
Solar cooking is done by means of the suns UV rays. A solar cooker lets the UV light rays in and then converts them to longer infrared light rays that cannot escape. Infrared radiation has the right energy to make the water, fat and protein molecules in food vibrate vigorously and heat up.
What is cylindrical collector?
It is formed by curved mirrors, concave channel shaped that concentrates its radiation over a pipeline that carries oil with high temperatures. Parabolic cylindrical collectors are also known as high temperature collectors.
How does a flat plate collector work?
A Flat Plate Collector is a heat exchanger that converts the radiant solar energy from the sun into heat energy using the well known greenhouse effect. As the plate gets hotter this heat is conducted through the risers and absorbed by the fluid flowing inside the copper pipes which is then used by the household.
What are the principles of a solar box cooker?
Heat Principles The basic purpose of a solar box cooker is to heat things up – cook food, purify water, and sterilize instruments – to mention a few. A solar box cooks because the interior of the box is heated by the energy of the sun. Sunlight, both direct and reflected, enters the solar box through the glass or plastic top.
What makes a solar oven a box oven?
The box solar oven is quite simple in design. Some of them are designed to be effective, inexpensive, and able to be created quickly and easily by anyone using common materials. The structure involves a reflective box which contains the pot for the food, along with a lid and a single reflective panels that concentrates sun into the cooker.
Can a solar cooker be made out of cardboard?
With an understanding of basic principles of solar energy and access to simple materials such as cardboard, aluminum foil, and glass, one can build an effective solar cooking device. This paper outlines the basic principles of solar box cooker design and identifies a broad range of potentially useful construction materials.
Why does the glass on a solar cooker face the Sun?
The more directly the glass faces the sun, the greater the solar heat gain. Although the glass is the same size on box 1 and box 2, more sun shines through the glass on box 2 because it faces the sun more directly.