Subscribe to the gold package and get unlimited access to Shamra Academy
Register a new userالدراسة النموذجية لاستخدام مواد التخزين في مجمع طاقة شمسية باستخدام الحاسوب
497
0 1
0.0
(
0
)
Created by
Shamra Editor
Ask ChatGPT about the research
في هذا البحث تم إعداد نموذج رياضي لمجمع شمسي يقوم بتخزين طاقة الشمس الحرارية التي يمكن استخدامها عند المغيب لأغراض متعددة, كتوليد الطاقة الكهربائية، التدفئة، أو في عملية تخمير الوقود الحيوي, أو أي استخدامات أخرى . يحتوي هذا النموذج على خليط من المواد القابلة لتخزين الحرارة مثل الرمل ، الكربون الأسود ، ماء البحر ، صخور الإسمنت الداكنة . لقد تم ترتيب معادلات النموذج وحلّها عند قيم افتراضية متغيرة لكل من شكل الخزان و أبعاده ، ونسبة المواد الداخلة في الخليط، وذلك من خلال إعداد برنامج حاسوبي مبنى على برنامج Matlab و تطبيقه على نوعين من الخلائط المستخدمة لخزن الحرارة ، وقد حولت النتائج الحسابية إلى منحنيات هندسية واضحة القيم بهدف المقارنة بين النوعين ، وقد تم تبسيط النموذج للتجربة وللدراسات المستقبلية, وقد كانت النتائج مشجعة, أظهرت أفضلية استخدام خليط ماء البحر مع صخور الإسمنت الداكنة على الخلائط الأخرى .
In this research a mathematical model for solar store is organized in which save the heat solar energy is saved for different purposes such as electrical energy generation , heating , or bio-energy fermentation and many other uses . This model includes a mixture of heat store substances such as sand , graphite , sea water , the dark cement rocks . The equation of the model was arranged , and solved by using variable values for the shape , and the dimensions of the reservoir and the percentage of the materials in the mixture by using a computer program through which the Matlab program was based on , and was practiced on two kinds of heats store mixtures . The results was converted in to geometric curves through which the comparison can be made between the two mixtures . The results showed that using a mixture of the sea water and dark cement rocks model gave better results .
References used
The Climate System 'Solar Radiation and the earth’s energy balance',Lectures-Monday and Wednesday, 11:00 AM -12:15 PM, Lab -Tuesday, 4:10 PM -7 PM EESC 2100 Spring 2007,29Nov.2008
rate research
Read More
Researchers and scientists to ease due to electric power generation
using fossil fuel plants with environmental pollution is seeking, in the
discovery and improve the methods of generation using renewable
energies. Floating solar chimney technolog
y of the most promising
technologies that can be used in power stations with solar chimney is
considered.
The research aims to give results on a proposal to determine the
specifications for the plant of this kind in the climate of the city of Homs,
for example, and the study of the behavior of this station and analyze the
most important parameters affecting it. In this research study hydrothermal
behavior floating solar chimney in the climate of the city of
Homs by a program written in a language programming EES thermal
power station.
Electric energy is very important for sustaining the good life on the planet's surface, especially since civilization has become associated with this type of energy. Solar photovoltaic (PV) is one of the most suitable applications for converting sunl
ight into electrical energy. The appropriate use of solar energy is an important topic for reducing dependence on fossil energy sources that are used to generate electricity, and thus reducing the emissions of greenhouse gases on the planet's surface. Globally, because of environmental conditions, other methods of generating energy being searched for that are less harmful than traditional methods, which rely on a large percentage of them on generating stations that run on fossil fuels. This research discusses electrical power generation using solar energy cells and the effect of these cells on the Syrian electrical grid so that a study of a solar energy farm project provides the data required when working on implementing such a project, and these data are voltage control, load flow, total harmonic distortion coefficient levels. To implement such a project, the model must be designed and we chose the ETAP program for that.
In this paper, an analysis of the balance of power and Exergy hyphen to
the station by solar radiation using thermal programming language EES, and
solving inter equations of mathematical model is written for the station
floating balances of the chimney in order to facilitate the analysis. We chose
thermal EES programming language to write a program to solve
mathematical equations governing the balance of power in this type of
stations due to its flexibility in dealing with thermodynamic tables, and the
possibility of solving linear equations, and many other features.
Solar and wind energy is considered as one of the best renewable energy resources
because it Available and economical . We can take advantage of these two resources of
renewable energy in Katina area in Homs for designing and building a bilateral r
esources
(solar-wind) electric power system, depending on the daily bending of the wind speed and
the solar radiation intensity in the studied area.
This research studies the design of a hybrid wind and solar system by selecting its
components that available in the local market in terms of their nominal, technical
specifications, based on the technical and economic studies and the corresponding
international standards. The obtained results showed that we have approximately (1246.7
Kw/Year) surplus during the year for the benefit of consumers, which makes the system
economically feasible for investment, as explained in research needs an additional resource
to feed the load and charge the energy-savings with (3360.2 w/day) that constituting (50.4
%) of the volume of the load in addition to the practical results provides a theoretical
database, whether for the researcher or the investor in the field of renewable energies,
particularly in terms of the efficiency of selecting the system’s components.
Background & Objective: Spray drying techniques are used to produce inhaled powders of enzymes and proteins without denaturation. The surface free energy data of these powders is used to reduce the time of formulation development. During storage, the
surface free energy of the inhaled protein powders could change and so their performance will be affected. Many factors affect the limit of this change. Storage temperature is the critical factor.
Material& methods: A spray drying method was optimized to prepare inhaled spray dried lysozyme powders. Inverse gas chromatography was utilized to measure the surface free energy of the prepared powders pre and post-storage to detect the effect of storage temperature on the surface free energy.
Differential Scanning Calorimetry and biological activity tests were used to evaluate the integrity of lysozyme conformation after storage at different storage temperature.
Results: Increasing the storage temperature decreased both dispersive and specific surface components of the spray-dried lysozyme powders significantly (ANOVA: P < 0.001) up to 12% and up to 31 % after storage for one year at 40 °C, respectively. The overall decrease in the polar components resulted in a
reduction of the surface basicity. These decreases in the surface energetics would be due to the aggregation of denatured lysozyme molecules at the powder surface via hydrophobic regions rich with electrons. The same results were found after storage for one year at room temperature, but the extents of
changes were smaller.
Conclusion: It is advisable to store protein powders at 5°C to inhibit the changes in their surface free energy which is the crucial factor affecting their performance.
Log in to be able to interact and post comments
comments
Fetching comments
Sign in to be able to follow your search criteria
