Trough solar power mirror

About Trough solar power mirror

A parabolic trough collector (PTC) 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. The sunlight which enters the mirror parallel to its plane of symmetry is focused along the focal line, where objects are positioned that are.

The trough is usually aligned on a north–south axis, and rotated to track the sun as it moves across the sky each day. Alternatively, the trough can be aligned on an east–west axis; this reduces the overall efficiency of the collector.

The enclosed trough architecture encapsulates the solar thermal system within a greenhouse-like glasshouse. The glasshouse creates a protected environment to withstand the elements that can increase the reliability and efficiency of the solar.

Commercial plants using parabolic troughs may use thermal storage at night while some are hybrids and supportas a secondary fuel source. In the United Statesthe amount of fossil fuel used in order for the plant to qualify as a renewable energy.

• Duffie, John; Williams Beckman (1991).(Second ed.). New York: John Wiley & Sons, Inc. • Patel., Mukund (1999). Boca Raton London New York Washington, D.C.: CRC.

A parabolic trough is made of a number of solar collector modules (SCM) fixed together to move as one solar collector assembly (SCA). A SCM could have a length up to 15 metres (49 ft 3 in) or more. About a dozen or more of SCM make each SCA up to 200 metres.

In 1897, , a U.S. inventor, engineer and solar energy pioneer built a small demonstration solar engine that worked by reflecting solar energy onto square boxes filled with ether, which has a lower boiling point than water, and were fitted internally with black.

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6 FAQs about [Trough solar power mirror]

Do parabolic trough solar collectors perform well?

G. Calderón, inRenewable and Sustainable Energy Reviews, 2017 The thermodynamics of a Parabolic Trough Solar Collector (PTC) play an important role in solar energy and the efficiency of the collectors. This report presents an up-to-date review on the thermal performance of PTC collectors.

What is a parabolic trough solar concentrator?

The traditional parabolic trough solar concentrator is widely used in the solar collection field, especially in a solar thermal power plant, because it has the most mature technology. Under the condition of accuracy tracking by a precise mechanism, it can achieve heat at a temperature higher than 400°C.

Which concentrating solar trough is the cheapest?

Among the concentrating solar collectors, the parabolic trough is the most developed, cheapest, and widely used for large-scale applications in harnessing solar energy. However, it is not yet cheaper than conventional fossil fuels, and improvements and developments in the PTC are a must . 2.2. Parabolic dish Sterling engine

Which solar power systems use parabolic trough technology?

As of 2014, the largest solar thermal power systems using parabolic trough technology include the 354 MW SEGS plants in California, the 280 MW Solana Generating Station with molten salt heat storage, the 250 MW Genesis Solar Energy Project, the Spanish 200 MW Solaben Solar Power Station, and the Andasol 1 solar power station.

What is a trough shaped reflector?

For large-scale solar concentration, a trough-shaped reflector has proved more effective. If the trough is built with a parabolic cross-section, the reflector will bring the incident sunlight to focus at a line rather than at a single point, a line running along the length of the trough.

What are PTC mirrors made of?

Typical PTC mirrors for CSP plants are made from float glass of 3–4 mm thickness with low iron content to avoid absorption in the glass, with a silvered backside, protected by a multilayer protection coating from the backside (copper, protection paints, and final lacquer) (Fig. 10).