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Register a new userReplacing of Steam Bleeding in a Steam Power Plant by Using Solar Energy
استبدال استنزاف البخار في المحطات البخارية لتوليد الطاقة باستخدام الطاقة الشمسية
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Aِl-Baath University ورقة بحثية
Publication date
2016
fields
Mechanical Engineering
and research's language is
العربية
Authors
عيسى مراد( باحث )
Created by
Shamra Editor
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تم في هذا البحث دراسة استخدام حقل شمسي مؤلف من مجموعة من المركزات القطعية لتسخين مياه التغذية عالية و منخفضة الضغط حسب توافر الإشعاع الشمسي و بالتالي يمكن الاستغناء عن الاستنزاف في أوقات السطوع الشمسي جزئياً أو كلياً. تم تحليل النتائج وفق المعطيات الشمسية و المناخية لمدينة دمشق حيث بلغت الزيادة في المردود السنوي حوالي % 1.6 بينما كانت نسبة الزيادة في الطاقة المنتجة سنوياً حوالي 6%.
In this paper the use of parabolic trough solar field to rise feed water temperature completely or partially according to brightness of sun is studied, in this way steam bleeding could be avoided variably. Results are analyzed according to Damascus solar and climate data, efficiency is increased about 1.6 % and power raised 6 %.
References used
Pai BR, 1991, Augmentation of thermal power stations with solar energy. Sadhana, 16, 59–74
Odeh SDMG, Behnia M., 1997, Trough collector field arrangements for solar-boosted power generation systems. Proceedings of ANZSES 35th Annual Conference Canberra, Australia
Ying Y, Hu EJ, 1998, A modified Rankine power cycle for solar thermal energy,Proceedings of Solar ‘98 The Annual Conference of the Australia and New Zealand Solar Energy Society. Australia p. 623–30
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The last stage endured on obvious erosion especially the front and the
end of the blade . The erosion caused the appearance some cracks in
this place. These remarks coincided with the theoretic al results ,
which were acquired according to the con
dition of the turbine of
station which showed that the droplet , which collided with the blade
ends, caused high pressure on the surface of the blade and caused
the occurrence of the corrosion . The danger of the erosion
unavoidable due to its relationship with tae station efficiency and the
only to avoid that is the use of the blade made of erosion resistance
ingots .
Three identical gable-even-span greenhouses were designed, constructed
and installed at the Agricultural and Veterinary Research Station of King
Faisal University in order to produce cucumbers during the winter season.
These experimental greenhous
es were covered by ٠,٨mm thick fiberglass
reinforced plastic. Two different solar heating systems were designed, built and
employed to heat the ambient air temperature inside the greenhouses. The
design of the first one was a surface heating system suspended and fixed on the
southern side of the gable roof of one greenhouse. The second solar heating
system was a solar panel, which was designed, built and situated outside of the
other greenhouse.
The process of direct steam generation was studied in this work
within a parabolic trough solar collector in order to generate
electricity. The study was based on the equations of a two phase
flow to study heat transfer in the collector's tube. Th
e study showed
a possibility to reach an effective model to study the performance of
this type of solar collectors which will aid in the understanding of
the working principle of power plants and to research further
towards new control strategies of solar power plants or towards the
hybridization with other types of power plants.
Direct steam generation in parabolic trough collector (DSGPTC)
has had a great importance because of its thermoeconomic
advantages and many researches have be done in
this field. Due to that reason this paper studies the convection
heat transfer
from absorber tube of a PTC to all phases of
water (liquid water, wet steam and dry steam) along the
whole distance of fixed length of a DSG-PTC generates a high
temperature superheated steam (561 °C). All heat transfer
operations in PTC has been modelled and then the
convection' components which are; fluid temperature, tube
wall-fluid temperatures difference and heat transfer
coefficient have been analyzed in details at different
operation conditions such as inlet fluid pressure, direct solar
beam and mass flow.
The integration of various renewable energy sources as well as the liberalization of
electricity markets are established facts in modern electrical power systems. The increased
share of renewable sources within power systems intensifies the supply
variability and
intermittency. Therefore, energy storage is deemed as one of the solutions for stabilizing
the supply of electricity to maintain generation-demand balance and to guarantee
uninterrupted supply of energy to users. In the context of sustainable development and
energy resources depletion, the question of the growth of renewable energy electricity
production is highly linked to the ability to propose new and adapted energy storage
solutions. Recent advancements in hydrogen technologies and renewable energy
applications show promise for economical near to conversion to a hydrogen-based
economy. As the use of hydrogen for the electric utility and transportation sectors. This
paper briefly discusses provides a historical perspective for hydrogen production and the
role of hydrogen as an energy carrier, discusses hydrogen economy, the process of
electrolysis for hydrogen production (especially from solar and wind technologies).
A comprehensive techno/socio/economic study of long term hydrogen based
storage systems in electrical networks is addressed. the excess produced hydrogen during
high generation periods or low demand can be sold either directly to the grid owners or as
filled hydrogen bottles. The affordable use of Hydrogen-based technologies for long term
electricity storage is verified. The results indicate that ample resources exist to produce
Hydrogen from wind and solar power. However, hydrogen prices are highly dependent on
electricity prices.
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