Design and Operation of Sustainable Systems

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Design and Operation of Sustainable Systems
Name
Class (Course)
Professor (Tutor)
School (University)
The City and State
The Date

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1. Introduction
A heliostat is a gadget that incorporates a mirror, that changes position in order to
continue reflecting daylight towards a foreordained tower, making up for the evident
movements of the sun. The tower might be far from the heliostat.
In a sun powered thermal power plants such as the Spain’s PS10 and California’s
Solar One, a large area containing heliostats centers the energy of the sun on a tower
to warm fluid. The fluid is passed through a heat exchanger for steam generation and
after that create power through a steam turbine. According to Farges, Berzian and El
Haffi (2008), PS10 sunlight based focal recipient office works in Spain. It produces
11MW utilizing its 624120 square meters heliostats pointed at the 115m high pinnacle
Figure 1: PS10 Spain. Source, (Farges, Berzian and El Haffi, 2008)
A somehow distinctive course of action of heliostats in a field is utilized at
exploratory sun based heaters, for example, there is one in France, Odeillo. All
mirrors of the heliostat mirrors disseminates precisely parallel sunlight rays to a
substantial parabolic reflector that conveys the rays to an exact core interest (Guillot,
Rodriguez, Boullet, and Sans 2018.

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Figure 2: Odeillo. Source (Guillot, Rodriguez, Boullet, and Sans 2018)
Littler heliostats are utilized for daylighting and warming. Rather than numerous huge
heliostats concentrating on a solitary focus to think sun oriented power, a solitary
heliostat for the most part around up to two square meters. A little heliostat, placed on
a an elevated construction such as a rooftop, proceeds onward two axes so as to make
up for the consistent development of the sun. Along these lines, the reflected daylight
remains fixed the objective.
From these plans over, the mirrors are substantial and subsequently, troublesome in
cleaning, and need a huge land zone to abstain from shadowing and blocking. When
contrasted with the proposed plan, they are progressively inclined to wind load which
can cause expanded spillage in the recipient
2. Selection of Bearing Diameter
There is a need to limit the maintenance activities which sacrifices the bearing size.
The thought is that the bearing ought to be sufficiently enormous to serve 25 years
and little enough to decrease control misfortunes

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For a general industrial machinery, the proportion of length to diameter (l/d) is
between a scope of 1-2. In the plan of journal bearing, there is a broad utilization of
dimensionless parameters - the Sommerfeld Number (Illner, Bartel, and Deters 2015)
Sommerfeld Number = ZN
P ( d
c )
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For a majority of designs, the Sommerfeld Number is
14.3 ×106 = ZN
P ( d
c )
2
P= W/ld = (300×9.81)/ld
N is approximated to be 20 rpm for the heliostat
From the table, c/d = 0.001 and therefore, d/c = 1000
Z = 0.03
Therefore,
14.3 ×106 =0.0 3 ×20 × l d
300 ×9.81 (1000)2
Therefore, ld = 70141.5mm2
But l/d = 2, hence, l =2d
Therefore
d = 187.271mm, say 188 mm
Length equals 2(188) = 376 mm
3. Pressure, forces, and selecting the diameter of bearing
From the abovementioned, we have two qualities for the measurement. It is
appropriate to choose the one which meets the cost necessities. Taking into account