International Research Journal of Engineering and Technology (IRJET) Volume: 09 Issue: 06 | June 2022
e-ISSN: 2395-0056
www.irjet.net
p-ISSN: 2395-0072
Parabolic Solar Cooker: Design, Construction and Testing 1Sonam
Kumar, 2Raja Kumar Singh, 3Sandeep Jhamb
1Dept.
of Mechanical Engg., Arya Institute of Engineering & Technology, Jaipur, India of Mechanical Engg., Arya Institute of Engineering & Technology, Jaipur, India 3Head of Dept. of Mechanical Engg., Arya Institute of Engineering & Technology, Jaipur, India -------------------------------------------------------------------------***-----------------------------------------------------------------------Abstract: Sun rays are used in solar cooker which makes it natural and clean source of energy. Uses of solar cookers can save 2Dept.
fuel and helps in eco-friendly cooking of food. The main disadvantage of the use of solar energy is it only available in daytime. The research is on the Design, Construction and Testing of Parabolic Solar Cooker with concentrated parabolic reflector. Heat which is coming from the sun is concentrated on the base of cooking pot which is kept inside the transparent glass box, the transparent glass box is fixed at the focal point of the parabolic reflector, the black coated makes cooking pot as a heat absorber. The heat absorbed by the black coated cooking pot is utilized for baking or cooking or boiling the liquid inside it. The sun rays tracking system is manual, the parabolic reflector can be rotate in the direction of sun easily with the help of screw jack mechanism.
Key Words: Parabolic, Solar Cooker, Heat absorber, Reflector, Focal Point. 1. INTRODUCTION
indoor or night. Concentrating solar cookers can achieve concentrating temperatures up to 350 OC.
Use of solar energy is one of the best ways to reduce the use of non-renewable resources of energy. The sun rays are also used to generate electricity, to heat water or other fluids and also used to heat the rooms in winter season through window glass and also for cooking. Solar Cookers are used as an alternative source of heat for cooking instead of conventional sources like firewood and other burning fuel oil and gasoline. One of the more efficient and famous solar cookers is the parabolic solar cooker. The working of solar cooker is so simple in which the incoming sun rays are concentrated at a point to generate heat or increase the inside temperature of cooking pot which is used for cooking or any other purposes.
2. DESIGN AND CONSTRUCTION The design is first and most important steps and everything or we can say whole thing is dependent on design, if our design is not good or not full fill our requirement the project is fail and we will not get desired results. In parabolic solar cooker the challenging design is the design of parabolic reflector, in this we designed the parabolic solar reflector in such a way that the rays which is coming from sun after the reflection from the parabolic reflector converged at a point that point is called the focal point of the parabola. Aluminium foil of thickness 0.4mm is used over the mild steel structure for the reflector construction, due to its light weight, low cost, energy effectiveness and high quality and good specular reflectance with reflectivity of 87%. To make parabolic reflector the reflecting aluminium sheet is cut into the required number of pieces in the trapezium shape. To support all the trapezium shaped aluminium sheet circular aluminium channelled structure is designed in which the one side of all sheet is fixed by the help of screw and nut, and copper wire.
In the parabolic solar cooker, there is a parabolic shape reflector on which the incoming sun rays are incident and after reflection all the rays are concentrate at a point. There is also another type of solar cooker called box type solar cooker in which the cooking pot is kept inside a box which is made up of transparent glass and wood and there is a plane reflector. And it is also possible to cook food approximate in the same time interval that food is cooked by conventional methods. The parabolic solar cookers have been identified to cook faster and can achieve higher temperatures compared to other types of solar cooker. There are two types of parabolic cookers, one is the direct solar cookers in which cooking pots are placed at the focus point of the parabolic dishes and another type are the indirect solar cookers in which the heat is stored and channelled for
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