Engineering Commons^™

Review Of Pollution Sources Of Sitnica River, Kosovo And Approaches For Improving The River Quality, Ermal Daka

UBT International Conference

The paper aims to provide an overview and in-depth analysis concerning the main sources of pollution of Sitnica River in the section from its springs to discharge into Ibër River. All the existing emitters discharging into the river and its tributaries are analyzed and ranked according to their impact on the river body in terms of pollution load. The main source of pollution appears to be the untreated domestic and industrial wastewater, as the pressure increases with the increasing of population living in the river basin. Different wastewater management approaches (centralized and decentralized) are proposed for the most significant emitters …

The Performance Of The Renewable Energy Sources In The Power Distribution Systems – Case Study, Vezir Rexhepi, Armend Ymeri

UBT International Conference

Renewable energy resources, among other things, play a significant role in the safe and clean supply of electricity consumers. Also, their impacts are reflected in the proper functioning of the transmission, generating and distributing system. Their integration into the topology of power systems and balance between production and consumption, also planning requires a detailed analysis so that the energy balance to be under allowed limits and has no consequences in impairing the safety margin of the power system parameters. For this, analysis and study coincide with the analysis of the indicators and their performance on the integration of these resources …

The Photovoltaic System And Efficiency Of Dc To Ac Buna Inverter, Bujar Dalipi

UBT International Conference

Solar energy nowadays is considered being one of the renewable resources that has the highest rate of growth. BuNa inverter efficiently transforms a DC power source to AC source,with better characteristics in comparison with other inverters.The purpose of this inverter is to supply the LED bulbs only with the same power, more efficiently than other inverters.The input voltage is 12 Volt from battery and output is 220 Volt AC pure sine wave without loads.The consumption of inverter without loads is 0.1 A from battery or 1.2 Watt.This type of inverter has many advantages:no electrical shock hazard,protected input from wrong connection,output …

Reformed Methanol Fuel Cells: Proposed Plant For Vehicular Applications, Kliton Bylykbashi, Roberto Capata

UBT International Conference

Among the various possible applications for a reformed methanol fuel cell, in addition to the portable generation in remote areas and military use, the use in the automotive field is interesting and promising. RMFC is used as "range extender" in battery-powered electric vehicles. This would increase the driving autonomy of the electric vehicle making it no longer strictly dependent on the capacities of today's batteries, eliminating the problems associated with them, such as the battery pack weight and overall dimensions. Besides, they need for recharge to short-term and are characterized by very high hazard in the event of a car …

Determination Of The Type Of Turbines For Use In Restelica 1,2 And 3 Hydropower Plants Based On The Natural Characteristics Of The River, Bukurije Hoxha

UBT International Conference

The focus of this paper describes the designing procedure of Small hydro power plant implemented in Restelica River, Kosovo. For normal operation of the Small hydro power plant, there must be done measurements of the river basin annually water flow, hydraulic net head of water, to calculate sustainability of water flow, flow duration curve, flow rate, configuration units depending on flow rate etc. The choice of the turbines was made depending on head and flow rate of water from which has resulted in the installation of different turbines that have fit better those conditions. The head losses in penstock are …

Use Of Adsorption Thermal Storage For Conservation And Reuse Of Energy At Living Homes, Mark Culaj

UBT International Conference

Use of zeolite type of long term thermal storage and reuse of energy at our homes. The goal is to create future completely self-sufficient energy independent living homes and residential buildings. Integration of heating cooling and refrigeration for everyday use by lowering energy waste and increase of overall energy efficiency management. Description of idea of integration of three household appliances, air conditioner, refrigerator and water heater, into unique system without need of thermal energy irradiation into external ambient. Conservation of thermal energy during hot summer and reuse of such energy for heating on days with low temperature.

A Geospatial Analysis Of The Existing Flood Situation In The Buna River Basin, Freskida Abazaj

UBT International Conference

Floodings cause economic, social and environmental damage and lives loss. In Albania, the rivers constitute the highest flood risk. Basic knowledge for apprehending the flood risk concerns the frequency and intensity of floods, the exposition of humans and assets to flooding, their sensitivity to floodwater and their susceptibility to suffer damage. My study case is located in Buna River area. This is a zone with frequent flood risk. A detailed analysis of the current state, problems and issues of the area is structured around topic areas elaborated in detail. The assessments, maps and developed catalogues of measures shall fulfil the …

Project Proposal For The Picoidraulica Laboratory, Kliton Bylykbashi, Roberto Capata, Sara Maccario

UBT International Conference

This project-oriented work, is a pre-feasibility study of a pico-hydraulics plant, which has to be installed on an appropriate structure in UBTUniversity for Business and Technology at Pristina, the capital of Kosovo. It begins with the structural analysis of the designed laboratory, moving on through to the technical-economic study of the individual components, concluding with the definition of its effectiveness, based on the actual data of the plant. The purpose of the plant comes from the idea of fully exploiting the energy available in a public building, with special regard to what is daily discarded without being exploited. It will …

Energy Performance Certificate – Belgium Example, Ibraim Hajdari

UBT International Conference

The Energy Performance Certificate (EPC) is based on following EU Directives:

The EU Directive 2010/31/EU of 19 May 2010 on the Energy Performance of Buildings (amended by Directive 2018/844 of 30/05/2018) requires the Member States, the establishment of a measurable system of Buildings Energy Performance (BEP) or a Certification of Energy Performance (CEP). This Directive requires that each EU member state must set up a specific calculation method to achieve the BEP requirements and to certify the energy performance of buildings.

The energy efficiency EU Directive 2012/27/EU of 25/10/2012, in particular the article n°5.

The EU Directive 2009/28/EC of 23/04/2009 …

An Application Of Pca Based K-Means Clustering For Customer Segmentation In One Luxury Goods Company, Ana Savic, Goran Bjelobaba, Stefana Janicijevic, Hana Stefanovic

UBT International Conference

In this paper K-means clustering algorithm is applied in order to classify customers into several groups showing the similarity within a group is better than among groups. After determining the relevant client’s attributes in a SQL Server database, PCA (Principal Component Analysis) is applied in order to reduce the number of features, and after that, K-means algorithm is performed in MATLAB programming environment, using fixed number of clusters. Each centroid defines one of the clusters, while each data point is assigned to the nearest centroid, based on the squared Euclidean distance. In this research, centroids are randomly generated, while the …

Heat Affected Zone Microstructure Of Weld Joint Preparation In Artificial Manner, Fidan Smaili, Tomaž Vuherer, Hajredin Ibishi, Afrim Gjelaj

UBT International Conference

This paper presents two possibilities of martensitic (fine grain and coarse grain) microstructure preparation. These microstructures are present as sub-zones in the heat-affected zone of welded joints, but due to the narrow region of HAZ in a real weld, only a few tests are possible to perform such as micro-hardness. Welding simulator and laboratory furnace were used as methods for the preparation of the specimens. The material used in this study was a Nickel Molybdenum alloy steel (18CrNiMo7-6). Investigation of the mechanical properties of sub-zones of the HAZ of this particular alloy steel, were done by applying proper thermal cycles. …

An Overview Of Condition Monitoring Of The Power Transformers Temperatures In The Electrical Power System, Vezir Rexhepi

UBT International Conference

In addition to the analysis of the transformer's assessment in view of the impact on the topology of the transmission, generation and distribution system, the recognition of the status of parameters and performance is a necessity to increase the efficiency of operational work, but the techniques/methods to perform the monitoring are essential. In this context, advanced monitoring techniques as well as smart devices that allow access to continuous analysis and diagnosis of parameters that are considered important for this purpose should be considered. One important condition of monitoring and diagnosis are the temperatures of the power transformers. In this paper …

Comparative Design Aspects Of Reinforced Concrete Liquid Retaining Structures, Ragip Behrami, Ilir Hetemi, Driton R. Kryeziu, Ermal Osaj

UBT International Conference

Reinforced concrete water retaining structures (RCWRS) must be designed so that the facility to be safe from leakage. One of the determining factors for the design of RCWRS is design with restriction of cracks. According to EN 1992-3 are defined four tightness classes in order to show degree of protection against leakage. In general, design of RCWRS can be done in two main cases: design without cracks and design with induced cracks which are controlled one. In this paper is shown the case where in design are foreseen to apply the concept of controlled cracks by application of joint tube …

Structural Investigations For The Refurbishment Project Of The Municipal Building Of Gjakova, Bledian Nela, Francesko Ruci Mail

UBT International Conference

This paper provides a comprehensive overview of the structural investigations performed on the existing municipal building of Gjakova, intended to be refurbished as part of the Refurbishment project by the European Commission. The municipal building of Gjakova built in the end of 1960s is a reinforced concrete structure with bearing masonry walls which are scattered without any logical pattern. This structural system poses a great challange for the seismic assessment of this building. In order to obtain the confidence factors and the mechanical parameters for the appropriate numerical modeling, a series of structural investigations is carried out in detail. Initially …

Near Infrared-Based Hyperspectral Imaging Approach For Secondary Raw Materials Processing In Solid Waste Sector, Giuseppe Bonifazi, Riccardo Gasbarrone, Silvia Serranti

UBT International Conference

In secondary raw materials and industrial recycling sectors there is the need of solving quality control issues. The development and deployment of an effective, fast and robust sensing architecture able to detect, characterize and sort solid waste products is of primary importance. Near InfraRed (NIR) based HyperSpectral Imaging (HSI) techniques to detect materials to recycle and/or solid waste products to process represents an interesting solution to address quality control issues in these sectors. In this paper, are presented two different case studies on the utilization of NIR-HSI to detect contaminants in household plastic packaging waste and recognize materials occurring in …

An Optimization Approach And A Model For Job Shop Scheduling Problem With Linear Programming, Fatmir Azemi, Daniel Tokody, Bekim Maloku

UBT International Conference

Optimization approaches and models are developed for job shop scheduling problems over the last decades, particularly the most attempts have been done in industry and considerable progress has been made on an academic line. The Job-shop scheduling considered the most significant industrial activities, mostly in manufacturing. The JSSP (Job Shop Scheduling Problems) is typical NP-hard problem. To solve this problem, we have used the linear programming approach. Real data have been taken from the company of the metalworking industry. The model has been created, then it was analyzed using Spreadsheet – Excel Solver. The appropriate sequence has been obtained and …

Image Based Recognition Of The Monuments In Prizren, Bertan Karahoda, Annea Futko

UBT International Conference

Image classification application has recently been covering a high number of research fields. In the other hand as the performance of the mobile devices is being updated day by day, the implementation of image recognition algorithms in them, is not only being trendy but very helpful in everyday tasks. With the automatic monument recognition, visiting a city is easy and fun. This application recognizes the captured monument, gives useful information and describes that particular landmark.

In this paper there are used four historical monuments of the city of Prizren, Kosovo and the aim is to classify these four famous monuments. …

Passive Control Of Structures, Feti Selmani

UBT International Conference

Lately, powerful earthquakes stroke some parts of the world, while the Balkan Peninsula was hit by moderate ones. During a powerful earthquake, a building structure is invaded by an enormous quantity of kinetic energy . As far as the manner is concerned, this energy it is initially absorbed, and thereafter distributed throughout building structure relying not only to the reaction of structure as a whole, or structural elements in particular, but the nature, the distribution and the quantity of the damages also. As Nikola Tesla once quoted:“If you want to find the secrets of universe, think in terms of energy, …

International Conference On Energy Efficiency Engineering, University For Business And Technology - Ubt

UBT International Conference

UBT Annual International Conference is the 8th international interdisciplinary peer reviewed conference which publishes works of the scientists as well as practitioners in the area where UBT is active in Education, Research and Development.The UBT aims to implement an integrated strategy to establish itself as an internationally competitive, research-intensive university, committed to the transfer of knowledge and the provision of a world-class education to the most talented students from all background. The main perspective of the conference is to connect the scientists and practitioners from different disciplines in the same place and make them be aware of the recent advancements …

Bim-Based Risk Identification And Assessment In Building Projects At Their Design Phase, Angeliki P. Tsoupra, Fotios P. Tsoukalis, Athanasios P. Chassiakos

UBT International Conference

The complexity and dynamics of construction sites, interwoven with the uncertain behaviour of human factors, may result in severe injuries in the workplace, illness, and may even lead to fatality. Despite the drafting of a strict legislative framework, the statistics in construction industry remain dissatisfactory and worrisome. Therefore, the demand for a thorough risk management process, based on automated safety modelling and preventive strategy, stands out in order to identify and eliminate potential hazards early in the design phase of a construction project, resolving thus safety issues in the field by extending traditional safety management practices. The underlying purpose of …