Bucharest, Romania
Bucharest, Romania

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Ilie C.,Splaiul Unirii 313 | Comeaga D.,Splaiul Independentei 313 | Dontu O.,Splaiul Independentei 313 | Popa M.,Splaiul Unirii 313
Advanced Materials Research | Year: 2013

To remove the shortcomings from the manufacturing process it is necessary to optimize all process parameters, for all stages of technological process: the exposure, the development, the electroforming and removal of the exposed SU8. This research implies that various types of MEMS devices can be developed at a high accuracy with design flexibility, only if all process parameters are optimized. This article is presenting a study regarding typical errors arisen during manufacturing of micro-parts using UV-LIGA technology. © (2013) Trans Tech Publications, Switzerland.

Climat changes and environment degradation are nowadays important problems that trigger important efforts of the worldwide research to to be focused on finding suitable solutions to solve these issues. Energy generation using renewable sources, represent modern and ecofriendly solutions that can contribute to overcome the pollution problem, with a wide range of practical applications. In this paper will be presented the main results obtained in the frame of the European Research Project RO0054/2009 (EEA Grant) entitled: "Integrated micro CCHP-Stirling Engine based on renewable energy sources, for the isolated residential consumers from South-East region of Romania".

Pencioiu P.,Splaiul Unirii 313 | Golovanov N.,Polytechnic University of Bucharest
EEA - Electrotehnica, Electronica, Automatica | Year: 2012

Increase installed capacity of photovoltaic installations to values according a conventional power plant necessitate the conditions analysis of the photovoltaic power can work in the public network, without reducing the electricity quality supplied to users connected to the network, and without being affected by disturbances in the network. It is also necessary to know how these plants can participate in system services necessary for safe operation of power system. The paper analyzes the main disturbances that can result from the operation of a photovoltaic power plant in the public network, the conditions for such plants to coexist with the power system and some of the solutions that can be taken to provide specific operational indicators to the source energy power system. It specifies that, that, although they have a specific operating system, the photovoltaic plants connected to the network for more than 10 MW installed capacity, are subject to the same conditions as any power plant in the power system.

This article describes the modeling and simulation of photovoltaic street lighting systems and a design concept of the power of LED lighting units proposed to use in areas with moderate solar potential. In finally is determined the contribution value of carbon dioxide emissions by replacing the traditional street lamps with LED lighting, solar lamps.

Renewable energy sources are in a continuous development and generally promoted by all national energy politics based on European strategy of limiting emissions and promoting green energy. Modeling the effects of some independent green sources on the transport and distribution power grids underlines a new problem and generates new techniques of adjustment and management. After various modeling simulations during the study the fact is that renewable sources can generate serious power grid falls and provoke even black-outs increasingly seen all over the world. The article puts up a real problem of management and control of the power transit optimized to increase the green energy produced.

The action of the electromagnetic field on the human body, is an important problem at the moment because it manifests through the disturbance of the mechanisms of the nervous system. It is of utmost importance to achieve an exact measurement of the sources of electromagnetic waves and consequently impose acceptable limits for human operators. Software tools offer effective techniques for simulating the induced electromagnetic field into human body. The present work studies the electric and magnetic fields produced by power lines and PV systems. The main field quantities are compared with those derived from the limits imposed by standards.

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