What is parabolic dish concentrator?
A parabolic dish is a point-focus concentrator that consists of a parabolic reflector that tracks the Sun and creates an image of the Sun at the focal point.
What is the efficiency of parabolic dish collector?
Within CSP technologies, parabolic dish concentrators are the most efficient of all solar collector types due to a combination of dual axis tracking and high concentration ratios [2]. The optical efficiencies noted for different dish concentrators range from 78% to 89% [3].
What is the material to manufacture parabolic dish concentrator?
Through a polished stainless steel parabolic dish, solar radiation is concentrated into a specific area called focus, where thermal energy is generated and is used for cooking or fulfilling a necessity without high investment and helping the environment.
How does a parabolic trough collector work?
Parabolic-trough solar concentrating systems are parabolic-shaped collectors made of reflecting materials. The collectors reflect the incident solar radiation onto its focal line toward a receiver that absorbs the concentrated solar energy to raise the temperature of the fluid inside it as shown in Fig.
What is parabolic solar cooker?
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.
What are three disadvantages to the parabolic cooker?
Disadvantages of solar cooker:
- It is slow.
- It can not be used in rainy or cloudey days.
- you can not cook all kind of foods usin solar cooker.
- it can not be used every where on the earth.
What are the disadvantages of the parabolic cooker?
The biggest disadvantage of using a solar cooker is that it is dependent on sunlight for cooking. As a result, you cannot cook using a solar cooker at night. Besides, rain, low sunlight penetration, cloudy weather, etc. also serve as impediment to cooking on a solar cooker.
How much is the effective area in a parabolic antenna?
Antenna efficiency: The efficiency of the antenna has a significant effect on the overall parabolic reflector gain. Typical figures are between 50 and 70%. The efficiency varies as a result of a number of different factors which are detailed below.