Volume 10, number 1, 2016: Print version and published papers:
METRICS FOR ENERGY EFFICIENCY IN LOGISTICS OF FREIGHT DISTRIBUTION
Mihaela ŞTEŢ , Technical University of Cluj-Napoca, North University Centre of Baia Mare, mihaela.stet@cunbm.utcluj.ro
Keywords: energy consumption, energy efficiency, energy management, economic indicators
Abstract: The paper is a study on the energy efficiency indicators that can be used for the activities in logistics of freight distribution, at the company level, as well as at macroeconomic level. There are highlighted also some solutions for increasing energy efficiency in distribution channels, starting from technical and logistics management actions, at the company level. There are revealed also the impacts of energy efficiency measures.
ON-LINE MONITORING SYSTEM FOR POWER TRANSFORMERS
Alexandru HOTEA, Sorin SAVA, Radu TÎRNOVAN, Technical University of Cluj-Napoca,sandu_hotea@yahoo.com, savasorin@yahoo.com
Keywords: monitoring system, power transformers, power system protection;
Abstract: Power transformers are the most important and expensive equipment from the electricity transmission system, so it is very important to know the real state of health of such equipment in every moment. De-energizing the power transformer accidentally due to internal defects can generate high costs. Annual maintenance proved to be ineffective in many cases to determine the internal condition of the equipment degradation due to faults rapidly evolving. An On-line Monitoring System for Power Transformers help real-time condition assessment and to detect errors early enough to take action to eliminate or minimize them. After abnormality detected, it is still important to perform full diagnostic tests to determine the exact condition of the equipment. On-line monitoring systems can help increase the level of availability and reliability of power transformers and lower costs of accidental interruption. This paper presents cases studies on several power transformers equipped with on-line monitoring systems from Transelectrica substation.
ASPECTS REGARDING SF6 SWITCH DISCONNECTOR FRAMEWORK DESIGN
Liviu NEAMT, Olivian CHIVER, Zoltan ERDEI, Cristian BARZ, Technical University of Cluj-Napoca, liviu.neamt@cunbm.utcluj.ro
Keywords: Finite element analysis, high-voltage techniques, switchgear
Abstract: The complexity of the designing process of a switch disconnector framework comes from the almost impossible task to appreciate the discrepancy between the ideal and practical electric strength. Complicated geometries characterized by nonuniform fields are predesigned based on a set of analytical relations and corrected/optimized based on numerical methods and high voltage testing on prototypes. This paper suggest some approaches to minimize the effort and the steps required to achieve an acceptable stainless steel housing, in the insulators area, for a medium voltage SF6 switch disconnector. The results are based on simple analytical evaluation and finite element analysis in both 2D and 3D configurations.
COMPARISON OF VARIOUS EPSON SMART GLASSES IN TERMS OF REAL FUNCTIONALITY AND CAPABILITIES
Oliviu MATEI1, Ioan VLAD2, Robert HEB1, Alexandru MOGA1, Otto SZIKA1, Ovidiu COSMA3 , 1 HOLISUN SRL, 2 Intellisoft Association, 3 Technical University of Cluj-Napoca,oliviu.matei@holisun.com, ioan.vlad@intellisoft.ro, robert.heb@holisun.com, alexandru.moga@holisun.com, otto.szika@holisun.com, ovidiu.cosma@cunbm.utcluj.ro
Keywords: smart glasses, Epson Moverio, mobile streaming
Abstract: The article presents some experiences with the smart glasses developed by Epson, namely Movrio BT-200, BT-300 and BT-2000. We conclude that they are on the right track, good devices, however, are still in an incipient, before the market stage and need a lot of technical (both hardware and software) improvements to be up to the needs of the real market.
CONSIDERATIONS ABOUT ELECTRODYNAMIC FORCES ANALYTICAL COMPUTATION
Alina NEAMT1, Liviu NEAMT2 1Anghel Saligny Technical College, Baia Mare, 2Technical University of Cluj-Napoca, alina23_tatiana@yahoo.com
Keywords: electrodynamic forces, analytical computation, electromagnetic fields
Abstract: The electrodynamic forces deped on the strength of the currents and conductors shapes and mutual positions. For simple configurations are available analytical solutions but for complex ones only numerical methods could be used. Anyway only the real-life tests will quarantee the accuracy in design process. So, the fastest method to predict the electrodynamic forces with acceptable error is desired. This paper deals with analytical solutions and the availability of each one regarding the imposed precision. The influence of filiformity and the infinite length is studied.
INVESTIGATION OF ELECTRICAL ENERGY EFFICIENCY USE IN AN AUTOMOBILE ASSEMBLY INDUSTRY
Jacob Tsado1, Olabisi AKINWOLE2, Gbenga OLARINOYE3, Sadiq AHMAD1, 1 Department of Electrical and Electronics Engineering, Federal University of Technology, Minna, Nigeria, 2 Peugeot Automobile Nigeria Limited, Kaduna, Nigeria, 3 Department of Electrical & Computer Engineering, Ahmadu Bello University Zaria, Nigeria, tsadojacob@futminna.edu.ng
Keywords: electrical energy, efficiency, saving, utilization, production
Abstract: This research work investigated the electrical energy efficiency improvement and cost saving potentials for automobile assembly plant; a case of Peugeot Automobile Nigeria Limited. The study identified lighting system as a major source through which energy is being wasted, hence efficient energy saving lighting systems are being proffered; also saving accrued were determined to justify their deployment. In the course of this work, an energy saving calculating tool was developed to calculate energy saving capabilities using energy efficient lamps. With ample devotion to the implementation of the recommendations made, the cost of energy per car will be drastically reduced while profits are also made simultaneously. In all, more cars will be produced thus translating to more employment opportunities in the industry.
EMERGENCY STATUS MANAGEMENT IN ENERGETIC FIELD . RISK TRANSFER
Gherasim Solovestru DOMIDE,Technical University of Cluj-Napoca, North University Centre of Baia Mare, gdomide@yahoo.com
Keywords: risk, insurance
Abstract:The state of emergency in the energy sector generates technical problems such as: disruption in the operation of machinery and equipment, replacement of equipment or others needs. Besides the technical problems which appear, also intervene economic and financial issues that generate costs for the replacement of machines, equipment and installations and expenses of compensation to third parties who have suffered losses by disconnecting the power supply or lack of electricity over a longer or shorter period. Modern methods of risk management include also economic solutions. Some of these solutions will be treated in this paper.