Solar updraft towers, also known as solar chimneys, are a relatively new concept of renewable energy power plant that may become widespread in the future.
They would combine three old and proven technologies: the chimney effect, the greenhouse effect, and the wind turbine. Air would be heated by sunshine and contained in a very large greenhouse-like structure around the base of a tall chimney; the resulting convection would cause air to rise up the updraft tower. This airflow would drive turbines, producing electricity. A first research prototype operated in Spain in the 1980s.
Many modelling studies have since been published as to their optimisation, scale and economic feasibility. Some proposals have involved mega-structures reaching up to a kilometre in height.* A small operating plant is reported to have been built in Jinshawan, China, as of 2011. The solar updraft tower (SUT) is a renewable-energy power plant for generating electricity from solar power. Sunshine heats the air beneath a very wide greenhouse-like roofed collector structure surrounding the central base of a very tall chimney tower.
The resulting convection causes a hot air updraft in the tower by the chimney effect. This airflow drives wind turbines placed in the chimney updraft or around the chimney base to produce electricity. Plans for scaled-up versions of demonstration models will allow significant power generation, and may allow development of other applications, such as water extraction or distillation, and agriculture or horticulture.
As a solar chimney power plant (SCPP) proposal for electrical power generation, commercial investment is discouraged by the high initial cost of building a very large novel structure, and by the risk of investment in a feasible but unproven application of even proven component technology for long-term returns on investment—especially when compared to the proven and demonstrated greater short-term returns on lesser investment in coal-fired or nuclear power plants. Likewise, the benefits of 'clean' or solar power technologies are shared, and the widely shared harmful pollution of existing power generation technologies is not applied as a cost for private commercial investment.
This is a well-described economic trade-off between private benefit and shared cost, versus shared benefit and private cost. If it is in the public interest, then some form of public investment or subsidy to share cost and risk will be required to demonstrate SCPP feasibility at scale. Power output depends primarily on two factors: collector area and chimney height. A larger area collects and warms a greater volume of air to flow up the chimney; collector areas as large as 7 kilometres (4.3 mi) in diameter have been discussed.
A larger chimney height increases the pressure difference via the stack effect; chimneys as tall as 1,000 metres (3,281 ft) have been discussed. Due to variations in design, climate, local geography and latitude, a standardised model for comparisons between design features and outputs is needed and proposed Heat can be stored inside the collector area. The ground beneath the solar collector, water in bags or tubes, or a saltwater thermal sink in the collector could add thermal capacity and inertia to the collector. Humidity of the updraft and condensation in the chimney could increase the energy flux of the system
9.2.14
Subscribe to:
Post Comments (Atom)
Write 4 namesake-expert
Thank you for your interest in being part of the namesake-expert writing community.
namesake-expert publishes original news content, opinion pieces, trending topics and breaking stories in the area of technology, entertainment, business, politics, lifestyle, videos,sports, lifestyle and women’s issues. Articles must be written in English, published first on namesake-expert and will be reviewed by the “seasoned” namesake-expert Team.
If you are interested revert back to proud2_besingle@yahoo.co.in
namesake-expert publishes original news content, opinion pieces, trending topics and breaking stories in the area of technology, entertainment, business, politics, lifestyle, videos,sports, lifestyle and women’s issues. Articles must be written in English, published first on namesake-expert and will be reviewed by the “seasoned” namesake-expert Team.
If you are interested revert back to proud2_besingle@yahoo.co.in
side l
Texts
images in posts are not related to the content .
it pasted to relate the content or to describe the message of post.
if any photo of any person in post hurting any sentiment it can be removed busted. pls complain it to this Email -->
proud2_besingle@yahoo.co.in
it pasted to relate the content or to describe the message of post.
if any photo of any person in post hurting any sentiment it can be removed busted. pls complain it to this Email -->
proud2_besingle@yahoo.co.in
0 comments:
Post a Comment
please leave your opinion about his blog ,
this will help us to give some more quality information.