International Journal of Energy and Environment


ISSN: 2308-1007
Volume 14, 2020

Notice: As of 2014 and for the forthcoming years, the publication frequency/periodicity of NAUN Journals is adapted to the 'continuously updated' model. What this means is that instead of being separated into issues, new papers will be added on a continuous basis, allowing a more regular flow and shorter publication times. The papers will appear in reverse order, therefore the most recent one will be on top.

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Volume 14, 2020


Title of the Paper: The Context and Principles of Environmental Management System Implementation

 

Authors: Dumitrascu A.-E.

Pages: 20-24

http://doi.org/10.46300/91012.2020.14.5

Abstract: The purpose of this paper is to detail the aspects regarding the implementation requirements of environmental management system in accordance with SR EN ISO 14001:2015. There are defined the main indicators underlying the context and the principles of environmental management system highlighting the importance of systematic approach of environmental management. The presented study consists of environmental aspects assessment specific to the production processes. By implementing the adequate corrective actions, the score of the significant environmental aspects decrease falling within the category of insignificant environmental aspects.


Title of the Paper: Research in the Field of Polycrystalline Diamond Tools

 

Authors: Ioan Enescu

Pages: 14-19

http://doi.org/10.46300/91012.2020.14.4

Abstract: The multitude of cutting materials already in existence increased further with the appearance of polycrystalline diamond (PCD) some 25 years ago. Ceramic show no chemical affinity to most machining materials, but are very brittle. Natural diamond, the hardest known material, is very wear resistant, but also sensitive to impacts and difficult to shape. The main advantage brought about by the development of polycrystalline diamond is the partial combination of the exceptional hardness of diamond with the toughness of tungsten carbide. This paper is presenting a series of the general considerations on cutting tools which have the cutting surface made of polycrystalline diamond. There are also presented some original results concluded by the author, based on experiments made with the tools mentioned before, which have different design values.


Title of the Paper: Interdisciplinary Process in the Field of Energy and Environment

 

Authors: Mihaela Popescu

Pages: 9-13

http://doi.org/10.46300/91012.2020.14.3

Abstract: The paper presents the results of a interdisciplinary research study of terminology in the field of energy and environment. Some modalities of acquiring terminology in environment and energy field by means of lexical and semantic entities to be mastered in a communication context are presented. Within the framework of a theoretical approach on the communication process, its cultural and social implications, the study is focused on a effects of applying a modern yet traditional learning method, problem-based learning and its benefits for the way information is rigorously organized and the importance of creating maps of representations of knowledge in this precise field. The knowledge-rich contexts contained in the corpora, the semantic relations comprised in the lexical networks are also described.


Title of the Paper: Thrusters Physical Model Formalization With Regard to Situational and Identification Factors of Motion Modes

 

Authors: Vitalii Budashko

Pages: 5-8

http://doi.org/10.46300/91012.2020.14.2

Abstract: Within the framework of the research of diagnos-tics and prediction of technical state of ship power plants (SPP) of combined propulsion complexes (CPC) depend-ences of correcting factors influencing components of thrusts and moments, proportional dimensions of model and real thrusts (THRs), tied to the original geometry were obtained. This was done by formalizing the physical model of the azimuth thruster with the means of identifying the degradation effects on the flow lines of the propellers by methods of computational hydrodynamics. The technique of improving the structure of the mathematical models of the SPP CPC according to experimental studies by measur-ing the input and output parametric coordinates of the THRs CPC of a vessel operating in the dynamic positioning mode is announced.


Title of the Paper: Techno-Economic Study of Linear Fresnel Solar Thermal Power Plant in Algeria

 

Authors: Hani Beltagy, Sofiane Mihoub, Hamid Ajdad, Noureddine Said

Pages: 1-4

http://doi.org/10.46300/91012.2020.14.1

Abstract: The objective of the present work is to characterize a power plant with concentrator of Fresnel on various Algerian sites (Sahara). These sites were chosen for comparison by moving the power plant in the Algerian sites: Hassi-R’mel, Tamanrasset, Béni-Abbes, and El Oued. A technico-economic study was made to determine the various characteristics of the power plant. This study is carried out through a simulation in the hourly scale: it concerns the insolation, the system 'field', and the 'receiving' system. The results of the simulation are represented on annual average. Annual energy production and the cost per kWh are evaluated, the technico-economic results are also estimated for the same sites, and the results are compared for the purpose of site classification.