This article offers an illustrated description of a method to produce a closed parabolic trough solar energy collector box based on the
elasticity of the material. What is described here is basically a manual method
to make high efficiency solar collectors against very low cost
Adidas Henrik Lundqvist Jersey , which is particularly suited for teaching, research or demonstration purposes. But it is hard for a manually made
collector to match the efficiency, lifetime and water tightness standard of an
industrial product using the same method. It will also cost more than the
industrial collector.
The method for industrial production of elastic closed parabolic trough boxes will be described in another article later. A parabolic
trough solar collector uses a mirror in the shape of a parabolic cylinder to
reflect and concentrate sun radiations towards a receiver tube located at the
focus line of the parabolic cylinder. The receiver absorbs the incoming
radiations and transforms them into thermal energy, the latter being transported
and collected by a fluid medium circulating within the receiver tube. This
method of concentrated solar collection has the advantage of high efficiency and
low cost
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way to exploit solar energy directly.
Known methods to form the parabolic cylinder reflective surface consist either of forming a curved plate material
under high temperature, or of adding pre-formed ribs at the back of a flat
reflective plate
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high precision. Our method uses the natural elastic deformation of a planar
plate to form a curved surface close to a parabolic cylinder, then redress the
approximation error of this surface, again using elasticity. As it is easier to
get higher precision by natural elastic deformation
Authentic Henrik Lundqvist Jersey , this method has the following advantages.
1. Simplicity and low cost. It is actually the only known method for home making high performance parabolic trough solar collectors without any special
tools. Not only the production cost drops to far below the other manufacturing
methods of parabolic troughs, but also it makes the solar energy collecting cost
substantially lower than any fossil fuel. The economic and social signification
of the method may be huge.
2. Better performance and quality of the product. It is a general understanding that the smaller a parabolic trough is, the lower
is its performance, although smaller parabolic troughs are much more useful than
bigger ones. The fundamental characteristics of the performance of a parabolic
trough solar collector are its concentration ratio and its optical efficiency.
Today
Mika Zibanejad Jersey , the concentration ratio of a parabolic trough collector of width between 1m and 2m is limited to about 50 times under
industrial manufacturing conditions and with high cost, while our method can
achieve an effective and efficient concentration ratio of over 80 times for a
manually made parabolic trough of width less than 1m, together with a higher
efficiency.
The solar collector described here has several usages, and changing the usage amounts simply to replacing the receiver tube. Beside the
simple low-temperature receiver described in this article that can be used for
water heater
Mats Zuccarello Jersey , space heater or heat source for an absorption cooler, there are also tubes covered by photovoltaic cells useful for combined
heat and electricity generation, and evacuated high-temperature receivers. The
latter can be combined with thermal storage devices to be described in a coming
article, to form round the clock electricity generating systems of sizes ranging
from individual home energy systems to large solar power plants.
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The low costs of the collector and the storage device guarantee that all these applications will lead to an energy cost significantly
below that of fossil fuels. The theoretic design principle of a closed parabolic
trough box can be found in MIT.
The method described here is patent pending. But the patent assignee allows royalty-free manual use of this method for
non-profit purposes. For commercial exploitation of the method or
product
Henrik Lundqvist Jersey , please contact the author.
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