T. Szarka

Bio: T. Szarka is an academic researcher from University of Miskolc. The author has contributed to research in topics: The Internet & Virtual Laboratory. The author has an hindex of 2, co-authored 9 publications receiving 18 citations.

Clean Power Challenges and Pilot Projects in Hungary

Abstract: In 2005 electricity generation from renewable energy sources in Hungary was 1721.7 gigawatthour (GWh) which was 4.5% of the total consumption while in the previous year this ratio was only 2.3% i.e. 884 GWh. By the end of 2005 Hungary exceeded the envisaged 3.6%, which will be increased to 7% by 2010. The authors were active members of individual, industry-academia projects in the clean power field and present the challenges existing in today's Hungary.

Internet at the service of electrical machinery and drives

Abstract: The world wide web became a vital element of all human activities by now. The rapid growth of fast and reliable communication networks provides an easy exchange of information and commands between computers connected to sites of wide area networks such as the internet. Engineers/students form far away workstations can operate through the internet with various remote equipment, since integrated web-learning and web-research environment become more and more accepted. Engineering is transformed into a constructive joint effort within the framework of simulation and exploration. Engineers share information at a rapid pace, with the collective aim of increasing product, process and service quality and reducing development time and costs. The internet-based, virtual or tele-laboratory permits experimentation independently of distance, in a way similar to what occurs in conventional laboratories. With the latest technology available, it reaches the same objectives as for a hands-on or conventional research or university laboratory, and even more efficiently in most cases. The application properties now range right up to the internet-controlled visualization of processes far away from the platforms. University of Miskolc Department contributed to the solution of these challenges by a new smart measuring instrument which performs on-line diagnostics of electrical motors developed particularly for design and production divisions of domestic labor-saving devices, and by an internet-based virtual laboratory serving the Ethernet network-based industrial measurement systems to all users through an “open for all” web site by Fieldpoint and General Purpose Interface Bus (GPIB) modules.

Internet-based measurement technology, electrical drives and automation

Abstract: The rapid growth of fast and reliable communication networks provides an easy exchange of information and commands between computers connected to sites of wide area networks such as the internet. Engineers from far away workstations can operate various remote equipment through the internet. Engineering is transformed into a constructive joint effort within the framework of simulation and exploration. Engineers share information at a rapid pace, with the collective aim of increasing the quality of product, process and service and reducing development time and costs. With the latter-day technology available, it reaches the same objectives as for a hands-on laboratory, and even more efficiently in most cases. The application properties now range right up to the internet-controlled visualization of processes far away from the platforms. University of Miskolc Department contributed to the solution of these challenges by an virtual laboratory serving the Ethernet network-based industrial measurement systems to all users through an “open for all” web site by Fieldpoint and General Purpose Interface Bus (GPIB) modules.

Fractional horsepower DC motor tests in virtual laboratory by Internet access

Abstract: A fractional-horsepower dc motor test series performed in a remote controlled virtual laboratory by Internet access was developed. Nowadays the remote controlled industrial systems have got great importance worldwide. The internet access has become general and the Ethernet cabling has been entirely applied in industry. The new virtual laboratory introduces users into the application of the most sophisticated emerging remote controlled measurement systems. The laboratory incorporates two units: one is built on Fieldpoint and another on General Purpose Interface Bus (GPIB) basis; both are dedicated to measuring and control. Software is developed in LabVIEW. The system is suitable for presentation of the virtual technology to any Internet user interested in the subject requiring such laboratory tests. The first step in the future will be to further develop the virtual laboratory applicable for tests and measurements of dc motors in kW range and to present the characteristics in transient state provided that ultra high speed computers will be available.

Drastic need for renewable sources in light of electrical power quality of a wind power plant

Abstract: The earth has become 0.76 °C warmer since the industrialization took up high speed. To reduce the global rise in temperature by the critical 2.00 °C requires that the content of greenhouse gases in the atmosphere will be limited to 450 (± 50) particles per million over the long term. In 2002 the total emission was 40 billion tons (Gt) and by 2030 it will be 58 Gt if nothing will be done. To save the globe the annual emission in 2030 must be 31 Gt, renewable sources can contribute by 20%. In Europe the losses coming from electrical energy quality problems exceed Euro 10 billion a year. A new wind power plant in North-Hungary having 2 MVA power with less than 50% of utilization ratio will pay back the initial cost within 10 years, its life span is 50 years. Its electrical power quality meets European standard requirements, however it is recommended to build current harmonic filters into the plant.

An Overview of Efficiency and Loss Characterization of Fractional Horsepower Motors

Abstract: This paper presents techniques for testing fractional horsepower (FHP) induction and brushless dc motors. The procedures for segregation of losses in these motors are presented. The issues encountered in testing FHP motors are discussed, and guidelines are provided to avert the issues. This paper also provides insights into understanding the test procedures outlined in the IEEE 114 Standard.

LED street lighting as a strategy for climate change mitigation at local government level

Abstract: In response to the environmental impact of climate change, greenhouse gas emission (GHG) reductions has become a common global goal. This has led to policies and measures to meet GHG reduction targets at country levels without much success. Therefore, the assessment of the effects of energy is important for the promotion of public policies at local levels that can lead to actions on GHG reductions. LED street lighting is more expensive than traditional luminaries and its use remains limited. This study analyzes the technical, economic, environmental and social impacts of LED street lighting in Ciudad Juarez, Chihuahua, Mexico and proposes changes of the street lighting municipal regulation to promote and ensure the adoption of this technology. The results of the study show that by upgrading the street lighting to LED a 64% of energy savings is achieved, which represents an environmental impact on GHG emissions avoided to the atmosphere of 33,192 tons of equivalent carbon dioxide (tCO2e) per year. We propose that the monetary savings achieved using LED street lightning be used to improve the quality of life for population groups in areas of the city that are most at risk.

Generic and Automated Data Evaluation in Analytical Measurement.

Abstract: In the past year, automation has become more and more important in the field of elemental and structural chemical analysis to reduce the high degree of manual operation and processing time as well as human errors. Thus, a high number of data points are generated, which requires fast and automated data evaluation. To handle the preprocessed export data from different analytical devices with software from various vendors offering a standardized solution without any programming knowledge should be preferred. In modern laboratories, multiple users will use this software on multiple personal computers with different operating systems (e.g., Windows, Macintosh, Linux). Also, mobile devices such as smartphones and tablets have gained growing importance. The developed software, Project Analytical Data Evaluation (ADE), is implemented as a web application. To transmit the preevaluated data from the device software to the Project ADE, the exported XML report files are detected and the included data are imported into the entities database using the Data Upload software. Different calculation types of a sample within one measurement series (e.g., method validation) are identified using information tags inside the sample name. The results are presented in tables and diagrams on different information levels (general, detailed for one analyte or sample).

Optimization and techno-economic analysis of PV/Battery system for street lighting using genetic algorithm – A case study in Oman

Abstract: Optimal sizing is necessary in hybrid renewable energy systems for the system to work with highest reliability and minimum cost. The street light system inside Sultan Qaboos University in Oman is considered as a case study for optimal sizing of PV/battery system for three different types of lamps, HPS, LED and discrete LED. The life cycle cost analysis and cost per kWh for two different configurations of panel and battery, the first with larger sized panel/battery and the second, smaller sized panel/battery with and without considering the number of autonomous days(NAD) is compared to investigate the economic feasibility of implementing the system in Oman. Genetic algorithm tool in MATLAB is used for optimal sizing, adopting loss of power supply(LPS) to gauge the reliability using actual data existing in Oman. The cost per kWh of generated energy with large panel/battery system was found to be 0.08 $/kWh while it was 19.9 $/kWh considering the same case for small panel/battery system proving the economic feasibility of implementing the large panel/battery system in Oman. Results also prove that higher the energy requirement, higher the LCC but lesser the cost per kWh. The conversion of the grid connected street light system extending a stretch of 8.6 km with 285 HPS lamps of 400 W to PV/battery system with LED lamp of 80W is expected to reduce the CO2 emissions by 133.595 tonnes annually. The results can be applied to practical systems worldwide to save millions of dollars and CO2 emissions.

A cross-platform modular software solution for automated data evaluation applied in elemental and structural mass spectrometry

Abstract: High-throughput solutions and automation systems are commonly used in bioscreening tasks. In the last years, automation has become more and more important in the field of elemental and structural chemical analysis. A high amount of data points is generated, what requires a fast and ideally fully automated data processing and evaluation. Analytical laboratories involve a multitude of analytical devices with different measurement principles from various vendors with a heterogeneous control software environment often with different export data formats. This results in one of the main tasks in laboratory automation: the integration of various devices to increase the applicative flexibility. Therefore, homogenous communication protocols and data formats are required. Furthermore, to increase the mobility and a spatial independence of the operator modern mobile devices such as tablet PCs and mobile phones can be involved in laboratory processes. In this study, a data evaluation software is presented, which enables an effective data processing of measurement data acquired with various instruments for elemental and structural analysis. The raw data are imported from the device software and the processed data are saved using Excel files. The software Analytical Data Evaluation (ADE) was implemented according to a modular concept as a web application, what enables a simple adjustment to different devices using individual settings stored in filter and calculation methods. Hence, a maximum in flexibility related to the various raw data structure and the required statistical parameters to be calculated can be provided. The cross-platform data evaluation software is independently usable from the user's location with stationary PCs or mobile devices. The integration into an existing hierarchical workflow management system provides a maximum of automation applied both in method development and in routine tasks using various types of analytical principles in a fully automated environment.