What is parabolic collection?

What is parabolic collection?

A parabolic trough is a type of solar thermal collector that is straight in one dimension and curved as a parabola in the other two, lined with a polished metal mirror. This solar energy collector is the most common and best known type of parabolic trough.

What is parabolic dish type solar collector?

Parabolic-dish solar concentrators are two-axis solar tracking systems that concentrate the solar radiations toward the thermal receiver located on the focal point of the dish collector as demonstrated in Fig.

How does a parabolic dish work?

Parabolic dishes are sometimes called parabolic deflectors or parabolic mirrors. A radio telescope with a parabolic dish. The parabolic dish works by either collecting or refracting energy. Energy sources such as sound, light, and radio waves are collected or reflected by parabolic dishes.

What is parabolic trough solar collector?

A parabolic-trough collector (PTC) is a linear-focus solar collector, basically composed of a parabolic-trough-shaped concentrator that reflects direct solar radiation onto a receiver or absorber tube located in the focal line of the parabola (see Fig. 7.1).

How does 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 the function of a parabolic trough?

The parabolic trough reflector is a solar thermal energy collector designed to capture the sun’s direct solar radiation over a large surface area and focus, or more generally “concentrate it” onto a small focal point area increasing the solar energy received by more than a factor of two which means more overall heat …

How does parabolic trough work?

A parabolic trough solar plant uses long, trough-shaped solar concentrators to collect solar heat and focus it onto a linear heat absorber. These reflectors track the Sun across the sky for maximum efficiency. In both systems a heat collection fluid is pumped through the heat receiver.

What is the use of parabolic antenna?

Parabolic antennas are used as high-gain antennas for point-to-point communications, in applications such as microwave relay links that carry telephone and television signals between nearby cities, wireless WAN/LAN links for data communications, satellite communications and spacecraft communication antennas.

How do you make a parabolic dish?

The easiest way is to cut and fold a flat sheet into a parabolic dish. Then glue a layer of aluminum foil on its inner surface, for reflectivity. The flat sheet can be as cheap as cardboard. However water resistant material, such as plastic or metal, will last longer.

How much does a parabolic trough cost?

The cost of solar trough is presented at 9–12 cents (U.S.)/kW h (Rs. 4.5–6) for solar insolation from 2000–2400 kW h/m2/yr for centralized systems and 11–40 cents (U.S.)/kW h (Rs. 5–20/kW h) for solar insolation from 2000–2400 kW h/m2/yr for decentralized systems.

What is compound parabolic collector?

Compound parabolic collectors (CPCs) are non-imaging concentrators. They have the capability of reflecting to the absorber all of the incident radiation within wide limits. Compound parabolic concentrators can accept incoming radiation over a relatively wide range of angles.

What are parabolic dish collectors (PDC)?

Parabolic dish collectors (PDC) are composed of a concave mirror which concentrates the direct solar radiation in a single point receiver and use a two axis solar tracking system which constantly tracks the sun. From: Renewable and Sustainable Energy Reviews, 2018

How does a parabolic dish reflector work?

A parabolic dish reflector (PDR) is a point-focus system with a paraboloid geometry given by the revolution of one half of a parabola around its normal axis. Sunlight entering the collector aperture with a normal incidence is concentrated onto a heat receiver located at the focal point of the dish.

What is a parabolic dish type solar power system?

A parabolic dish type of CSP system uses a parabolic dish-shaped or concave mirror to concentrate sunlight on to a receiver situated at the focal point of the mirror as highlighted in Fig. 1D. The concentrated solar energy is absorbed by the receiver to heat a fluid to ∼ 750°C.

Why are parabolic dish concentrators so expensive?

As a parabolic dish becomes larger, its area increases and so do the wind loads on the system. Also, the weight of the whole system increases. Both of these factors contribute to dynamical deformations of the concentrator structures and make very expensive to attain good enough optical accuracy for large system sizes.