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Register a new user50 Watt Thermoacoustic prime mover Design, manufacturing, and Testing
تصميم و تنفيذ و اختبار لجهاز توليد موجة صوتية باستطاعة 50 واط
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يجري في جامعة دمشق بكلية الهندسة الميكانيكية و الكهربائية بحث تطوري لمشروع للطاقة المستدامة شمسي ثيرموصوتي. حيث قامت العديد من الأبحاث السابقة ضمنه، و تضمنت نمذجة و توصيف معادلات التصميم اللازمة لمولدات الموجة الصوتية و مبرداتها. يهدف البحث الى تصميم و تنفيذ مولد موجة صوتية للأماكن المعزولة باستخدام تقنيات منخفضة. حيث تم تصميم و بناء بعض من هذه التجهيزات، و كذلك تطوير برامج تصميمية لهذا الغرض.
In Damascus University a researches of sustainable project named "Thermoacoustic solar" going on. Early researches were done on Thermoacoustic devices, modeling equations for design were submitted. The aimed wave engine using low technology, the final goal is building large sized tunnel. Since It is necessary to build an evaluating device, helping to push the research to a straight rout to the goal.
References used
Tijani,M.E.H. 2001. “Loudspeaker-Driven Thermoacoustic Refrigeration” Ph.D. Thesis University of Eindhoven, Netherlands
M.E.H Tijani, J.C.H Zeegers and A.T.A.M Waele,2002. “Construction and Performance of a Thermoacoustics Refrigerator” Cryogenics 42 (2002) 59-66
Daniel George Chinn. " PIEZOELECTRICALLY-DRIVEN THERMOACOUSTIC REFRIGERATOR". Master of Science, University of Maryland, College Park. 2010
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The main goal of this search is to design maximum solar power batteries charging
system, Maximum power point tracking (MPPT) system is used in the photovoltaic (PV)
system consisting of a buck-boost Direct Current DC/DC converter, which is controll
ed by
a microcontroller unit, The microcontroller is programmed with a simple and reliable
MPPT called Incremental Conductance (InCond).
The designed battery charger was tested, and the results obtained had insured about
the permanent control on the battery charging.
Comparison study was done, with PWM solar charger controller, it was obvious by
The experimental results, that the battery get charged in a very short time period
considering of the solar sun light hours per day, and the characteristics of the used solar
panel, which confirm the reliable performance of the suggested charging system.
The DC sources like fuel cells, solar cells, storage units need to
raise its output voltage in order to match load requirements. So often these systems are equipped with Power Electronics
techniques in general and DC-DC booster converters in partic
ular.
The paper provides the mathematical model and algorithm for
designing the booster converter with selected values in order to define the values of the most important parameters of its
components including inductor parameters. Based on the developed algorithm, a simulation of the system is conducted in MATLAB / Simulink environment to analyze the impact of changing the inductor inductance on booster performance.
Also the paper includes the mathematical model and algorithm for designing the booster inductor in terms of material, conductor type and shape of core and number of windings. Based on the design results, the inductor has been implemented completely in the laboratory. The inductance of the implemented inductor has been measured using a number of measuring methods to make sure of its value and match it with the theoretical values of design. Finally, the developed algorithm has been translated into a program in an environment Matlab / GUI , with which several computer tests have been performed.
In this study, we have designed and manufactured a simple and relatively
inexpensive solar cell, from the available materials in the local markets, where the cell is
contained of the outer body (Case), which is a plastic box on a parallel form of r
ectangles
of acrylic transparent allows the passage of light. It has resilient and high durability, and
two poles of red copper higher purity, one of them has been thermally treatment to
different temperatures (200, 300, 400°C), which turns the copper pole from carrier to semiconductor
(cuprous oxide, Cu2O), using heating device (Hot plate).
The other pole left without treatment and the electrolyte solution (Gel) has been
developed on the (Hydrogel), thus freeing electrons from the treatment plate to the
Hydrogel layer then to the clean plate (non-treatment), during shining light.
The results showed that the cell voltage proportional to the polyelectrolyte
concentration and the area of copper pole (cuprous oxide). As the experiments showed that
the temperature has an important role in transforming the metal carrier to the semiconductor,
and whenever this conversion possible whenever the pole of the light
sensitively more effective and efficient.
This Research presents a detailed study and practical design for the
construction, programming and implementation of the system to
receive SMS messages sent from a mobile phone or more to the
SIM card placed with in the circuit (GSM-MODULE) connected in
turn with a microcontroller which translates and shows this message
on the optical matrix.
High Voltage Direct Current systems have been used for
transporting electrical energy for very long distances, at high
voltages (100- 1000 kv). On utilize thyristorized or transistorized
power converters, one converter is working as rectifier at s
ending
side, and the other is working as inverter at receiving side. Back to
Back Converters are used also where the rectifier and inverter are at
the same station, transmission line has hundreds of meters as long.
In our model we used non controlled three phase rectifier as
sending station and controlled three phase bridge as receiving
station (Graitze).
مبدلات التوتر و التيار
المقومات و العواكس
قدح الثيرستور
دارات توليد النبضات
إشارة التزامن
Voltage and current Converters
Power Transmission using High Voltage Direct Current systems
Rectifiers and Inverters
Thyristor firing
Synchronizing signal
نقل الطاقة الكهربائهة بالتوتر المستمر عالي التوتر
المزيد..
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