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Craiova, Romania

Popescu M.-C.,University of Craiova | Mastorakis N.E.,Technical University of Sofia | Popescu J.-O.,College Elena Cuza
WSEAS Transactions on Heat and Mass Transfer | Year: 2010

The paper focuses on modeling the phenomenon of air recirculation in rooms with heat releases. Modeling highlights the connections existing between climatic values (pressure-temperature) and allows the determining of an airing constant used in describing the efficiency of a passively climatized room. In the second part of this paper the authors propose efficient solutions to remove heat from the room, using conventional air conditioning equipment. Source


Popescu M.-C.,University of Craiova | Mastorakis N.E.,Technical University of Sofia | Borcosi I.,Constantin Brancusi University | Popescu J.-O.,College Elena Cuza
WSEAS Transactions on Power Systems | Year: 2010

As compared to hydraulic, pneumatic, or thermal motor devices, electrical drives have certain advantages owed to the ease of generating, transporting and distributing the electrical energy. This fact made them become the first choice in most of the cases emerging in actual activity. The present paper simulates the behavior of electrical drives powered by continuous current motors. The efficiency optimizing of the drive systems in industrial and modern appliances can be done through using vector control with DSP and intelligent power module for asynchronous motors. The authors contribution to this paper refer to the proposal and development of a control system of a rotation AC motor with field oriented control based on the signal processor TMS320F2812 DSP. Source


Popescu M.-C.,University of Craiova | Mastorakis N.E.,Technical University of Sofia | Grigoriu M.,Polytechnic University of Bucharest | Popescu J.-O.,College Elena Cuza
WSEAS Transactions on Fluid Mechanics | Year: 2010

In practice, due to various over-the loss of pregnancy considered by designers as a security measure, the pump provides a flow chosen much higher than calculated. The main greenhouse gases (GHGs) producer is represented by the fossil burning systems. The paper presents the effect on the GHGs emission combined with the economic effects of a new pumping system method of automatic mixing of hot and cold water circulated with variable speed driving pumps and adjustable vanes. Considering the potential economic and environmental effects combined with the social one, The heating systems represent a sensitive sector of the energy consumers' basket, strengthen by the unpredictable primary energy price fluctuation, the recent financial crisis and the population expectations. This paper tries optimizing operation of machinery, hydro-pneumatic. Source


Popescu M.-C.,University of Craiova | Mastorakis N.E.,Technical University of Sofia | Popescu J.-O.,College Elena Cuza
WSEAS Transactions on Information Science and Applications | Year: 2010

This paper develops two distinct systems in terms of their use: the classic centralized access control in a building (or building complex) based on a card and the proposed system of development for applications based on PIC 16F628 microcontroller. These systems are studied in terms of advantages and disadvantages involved in using them. In the second part of the paper shows how to implement video-tracking device used to access an enterprises. Source


Popescu M.-C.,University of Craiova | Mastorakis N.E.,Technical University of Sofia | Popescu J.-O.,College Elena Cuza
WSEAS Transactions on Systems and Control | Year: 2010

This paper aims to achieve a program that operates the traffic light of intersections with TwidoSoft programming language. The order of priority between traffic rules is implemented in machine specific language TwidoSoft. At the end of this paper is a simulated traffic congestion situation. Source

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