Wyniki wyszukiwania - BazTech

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Environmental assessment of solar cell materials

Klugmann-Radziemska Ewa

Ecological Chemistry and Engineering. S

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2023

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Vol. 30, nr 1

23--35

EN

In today’s world, fossil fuels, including coal, oil, and gas, are the primary energy sources from which electricity is obtained. As they are exhaustible and their exploitation has a negative impact on the natural environment, they should be, at least partially, replaced by renewable energy sources. The implementation of this goal depends on a number of factors, including social and political, the existence of investment support programmes, and the need to lower electricity prices and ensuring energy security. One of these sources is solar energy. Each year, the Earth receives around 1 ∙ 1018 kWh of solar energy, which is more than 1000 times the current global energy demand. This is therefore a vast source of energy that can be tapped to satisfy human energy requirements. The use of solar energy releases no CO2, SO2, or NO2 gases, and does not contribute to global warming. Photovoltaics is one of the technologies that makes it possible to generate electricity in an environmentally friendly manner. By using the energy of solar radiation, a photovoltaic cell converts energy without emitting harmful substances to the atmosphere, noise, and waste. Photovoltaics is the cleanest technology among all the technologies that use renewable energy. Considering the shorter and shorter times needed to generate energy equal to that required by the module production process, during its lifetime it will produce much more electricity than was used to produce it. This results in a reduction in greenhouse gas emissions. For example, during its lifetime, a 200 Wp module prevents the emission of over four tonnes (Mg = 106 g) of carbon dioxide. Although the technologies for the production of photovoltaic cells and modules entail a lower environmental burden compared to other sources of electricity, it is necessary to remember about the risks associated with the use of chemicals at the stage of module production, which threatens their release to groundwater or air, and the need to recycle modules after their disassembly. Also, the energy consumption in the production phase of PV systems significantly worsens the ecological balance. This article presents an analysis of the impact of the materials and technologies used on the result of the environmental analysis of PV installations. In the article a detailed energy balance analysis of the EPBT value has been carried out. The values of greenhouse gas emissions throughout the life cycle of the solar module were determined. Methods of limiting the impact of photovoltaic technologies on the natural environment were indicated.

2

Laser Power Transmission and Its Application in Laser-Powered Electrical Motor Drive: A Review

Liu Hongzuo, Zhang Yixuan, Hu Yihua, Tse Zion, Wu Jing

Power Electronics and Drives

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2021

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Vol. 6 (41)

167--184

EN

Laser power transmission (LPT) is considered a potentially efficient way for power delivery, especially in long-distance wireless applications and harsh hazardous environmental conditions. In contrast to other wireless power transmission (WPT) methods, LPT has many advantages such as lower device size, focused transmitting direction and high power density. With the development of technology, LPT has been widely adopted in several fields. In conservative industries, the utilisation of LPT can resolve the limitation problem in a wired connection. The adverse influence of electromagnetic interference (EMI) concerning application and high-temperature fields can be reduced. This paper will give a simple review of LPT and demonstrate the basic concept of a photoelectric emitter, transmission channel and receiver material. Based on the recent research about diode laser beam combining technology and high-efficiency multi-junction photovoltaics (PV) materials, the advised LPT devices for simple application as laser power motor will be simply discussed.

3

Badanie materiałów fotowoltaicznych z wykorzystaniem urządzenia Sherescan

Musztyfaga-Staszuk M., Tański T.

Energetyka

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2015

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nr 1

37--39

PL

Przedstawiono wyniki badań parametrów krzemowej płytki półprzewodnikowej, takich jak typ przewodności p/n i rezystancję powierzchniową warstwy dyfuzyjnej emitera oraz parametry wytwarzanego ogniwa fotowoltaicznego, takie jak rezystancja kontaktu na styku metal - półprzewodnik z zastosowaniem urządzenia „Sherescan”.

EN

Presented are testing results of a semiconductor silicon wafer parameters such as p/n type conductivity and surface resistance of an emitter diffusion layer as well as the parameters of the produced photovoltaic cell like the contact resistance of a metal - semiconductor junction with the use of Sherescan device.

4

Report on the main areas of the materials science and surface engineering own research

Dobrzański L. A.

Journal of Achievements in Materials and Manufacturing Engineering

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2011

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Vol. 49, nr 2

514--549

EN

Purpose: The purpose of the paper is to present the representative examples for the own scientific research in the area of the forming of the structure and properties of engineering materials including biomaterials, their properties testing and microstructure characterisation and modelling, simulation and prediction of the properties and structure of these materials after selected materials processing technologies. Design/methodology/approach: The main areas of the scientific interests reported in this paper on the basis of the own original research include forming of structure and properties of engineering materials including biomaterials using advanced synthesis and materials processing technologies and nanotechnologies, engineering materials including biomaterials properties testing and microstructure characterisation using very advanced contemporary research methodologies including electron microscopy, modelling, simulation and prediction of properties and structure of engineering materials including biomaterials using advanced methods of computational materials science including artificial intelligence methods. Findings: A general character of the paper concerning many aspects of material science research enabled a detailed description of research methodology and details concerning research results. Detailed information is included in many detailed cited works. Practical implications: Presented research results can be used in practice. Originality/value: The paper presents numerous research results which Has been made during last years generalising the achievements of the research team directed by the author.