Studying and fabrication of electrical transparent self-cleaning dust shield for solar panels

العناوين الأخرى

دراسة و تصنيع ألواح كهربائية شفافة لتنظيف سطوح المجمعات الشمسية من الغبار المتراكم عليها ذاتيا

مقدم أطروحة جامعية

Aziz, Rasha Iyad

مشرف أطروحة جامعية

Abd Allah, Manal Midhat

الجامعة

جامعة بغداد

الكلية

كلية العلوم

القسم الأكاديمي

قسم الفيزياء

دولة الجامعة

العراق

الدرجة العلمية

ماجستير

تاريخ الدرجة العلمية

2014

الملخص الإنجليزي

The accumulation of dust over time on the surfaces of cells and solar collectors is one of the most series problems facing the maintenance and operation of these networks.

In his study we are trying to participate in solving a part of this problem.

Dust particles are statically charged in nature, hence we adopted the idea of cleaning the surfaces of solar collectors in a manner dependent on the generation of electrostatic charge on the surface of solar collectors.

The aim is generating a repulsive force between the accumulated dust particles and the charged surface.

The repulsive force helps in cleaning the surface of the system.

For the first time, according to available researches, we manufactured a self-charging and cleaning system, where we used a D.C.

current from the solar cell itself to charge a conductive glass located on the top surface of the cell.

It is worth to say that we used 0.01 of the solar cell's output current for charging the conductive glass.

In this research, we manufactured a transparent conductive glass by spraying a thin film of a Tin dioxide ( SnO2 ) on a glass sheet.

The prepared thin film showed high transparency in the spectral response region of the silicon solar cell, a good adhesion with the glass, economic, and stable in different weather conditions.

AFM test showed that the average particle diameter of the prepared conductive glass surface was (183.8 nm).

Other important tests were done also , such as the X-Ray and the SEM.

We have conducted experiments to study the relationship between the transparency factor of the glass (clearing factor) and the amount of applied voltages to the conductive glass on the one hand, and the relation between the diameters of accumulated dust particles and the clearing factor on the other hand.

For this purpose we have collected dust and classified into three categories depending on the values of the dust particles diameters (20 , 40 and 56 μm).

We measured the efficiency of the system for each case and the results were as follows: The efficiency of the system consisting of a solar cell-covered with the conductive glass was 3.52%, spreading the dust on the surface of the conductive glass gave efficiency 0.27%, (i.e.

92.33 % energy loss for dusty solar cells).

Charging the conductive glass with 1 volt increased the efficiency to 0.31% (decreasing the energy loss to 91.2%).

Increasing the charging voltage to 4 Volt increased the efficiency of the system to 2.704% (23.18% loss in energy).

We found that the charging with 7 volt gave a clean glass.

this recorded efficiency of ( 3.42 ) that mean the energy loss was (2.84 % ).

Also in this study we represent the components and characteristics and behavior of the accumulated dust on those surfaces.

Fluorescence X-Ray results showed that the dust is composed of various elements such as lead, silver, nickel, copper, and many others.

The presence of those elements on the charged conductive glass depend on their electrical conductivity and molecular weights.

التخصصات الرئيسية

الفيزياء

عدد الصفحات

60

قائمة المحتويات

• APA
• MLA
• AMA

لغة النص

الإنجليزية

نوع البيانات

رسائل جامعية

رقم السجل

BIM-607467