الفهرس 
First Constructed modelsOnly 14 pages are availabe for public view
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Abstract
With the growing demand on electrical power for day to day activities that
coincides with less power resources specially for fossil fuels that is also
creating many issues for the environment, a big need for shifting round to the
Renewable energy resources(e.g. solar , wind , water , sea waves
,…,etc.,)which is more cheaper and effectively clean.
One of the most common renewable energy types is the solar energy with
different power generation ways (photovoltaic solar system, thermal solar
system).
Many studies were there for enhancing the use of thermal solar system
technology that converts radiation from sun into heat energy that would be
useful for energy generation through many ways and techniques. One of the
newly developed technologies for the thermal solar energy is the solar
chimney which is the subject of our study in this research.
Conventional solar chimney theory based on retaining long waves Sun
radiation and admits short waves solar radiation through a transparent
surface (collector) thus solar radiation is absorbed heating up air that will
start raising up inside the chimney where located turbine(s) with electrical
generator would start producing electrical power.
In this work, power generation enhancement for a 2.00 m height hexagonal
base solar chimney with a 6 double faced trapezium sides is introduced.
Amount of energy acquired to move the generating part of the solar tower
(direct current fan on the exit) depends on the air flow which will increase
with the temperature raise that is affected by the solar heat up of the double
faced sides. Analysis and comparison will be based on taking different
temperature readings in 3 cases for the stagnant fluid filling the gap of the
double faced solar tower sides (air, vacuum and helium) to see the best case
where the highest air temperature is reached and consequently having the
highest generated power.
In addition to that, a Savonius air turbine is to be fitted on the top of the tower
to get more power from the unit in dark time using the wind energy which is a
continuous source not relying on solar energy.
Vacuum was found to be the best option due to its lowest heat losses to the
surrounding as it acts as heat transfer isolator for conduction, also Savonius
was a good addition to the system but with the constrain of having it attached
to the system due to induced vibrations and stresses on the solar chimney
tower.