Jasna Radulovic

• University of Kragujevac

In modern agriculture today, the cultivation of agricultural products cannot be imagined without greenhouses. This paper presents an energy optimization of a solar greenhouse with a photovoltaic system (PV) and a ground-source heat pump (GSHP). The PV system generates electricity, while the GSHP is used for heating and cooling. A greenhouse is desi...

In the last few decades, buildings have been recognized as large energy consumers, so it is necessary continuously implementation of different measures for improving energy efficiency of existing and construction of energy efficient new buildings. The use of renewable energy sources is essential, and solar energy represents the most promising and m...

Exergy as a measure of useful work can be used in the design, simulation and performance evaluation of different energy systems. In this paper it is investigated the Serbian residential building with photovoltaics and solar collectors on the roof, and with three different heating systems: electrical heating, district heating and central heating wit...

The implementation of energy efficiency measures and use of renewable energy sources in educational buildings can significantly contribute to reducing energy consumption, but also to CO2 emissions in the entire public sector. The paper shows the comparison of energy consumption indicators for 61 elementary school buildings which have previously bee...

It is well known that nowadays a significant part of the total energy consumption is related to buildings, so research for improving building energy efficiency is very important. This paper presents our investigations about the dimensioning of horizontal overhangs in order to determine the minimum annual consumption of building primary energy for h...

Global environmental concerns and rapidly increase demands for energy, coupled with permanent progress in renewable energy technologies, are creating new opportunities to utilize renewable energy resources. Solar energy is the most abundant, inexhaustible and clean of all the renewable energy resources. Photovoltaics generate electrical power by co...

Abstract: For a positive net building (PNEB), the paper presents its need, and tools to achieve its design. The PNEB should provide the maximum thermal comfort with a minimum of energy, primary energy, and exergy consumption, •and reduction of the use of energy resources, maximizing energy security, as well as the minimum impact on the environment....

The vegetation walls, which are using in the architecture, have opened new design possibilities and created new challenges for designers, with the aim to increase energy efficiency of the structures.Main goal of the vegetation walls architecture is to enable the building a new type of urban recognition in the environment and to create conditions fo...

The vegetation walls using in the architecture has opened new design possibilities and created new challenges for the designers, with the aim to increase the energy efficiency of the structures. The purpose of this investigation is optimization of the façade by covering of the existing architectural structure with vegetative modular elements, using...

Solar energy has a significant impact on the environment, so the development of new technologies in this field is very important for many reasons and is subject of many researches nowadays. Incorporation of phase change materials (PCMs) into building structures has been found as useful for reduction of temperature fluctuations, while maintaining th...

According to the contemporary research, there are some indications that extremely low frequency electromagnetic fields, such as those originating from electric power transmission lines, can have some influence on human health. This work involved the computation of the magnetic field generated by one typical 110 kV power transmission line in Serbia...

In this study we considered quality of computerized tomography (CT) scanner according to emission of ionizing radiation. The CT scanner as a X-ray source is the most common diagnostic method in radiology and have significant impact of dose exposure by human body during life. The measurement is performed by standard ionizing chamber dosimeter. The o...

In Serbia, for heating of domestic hot water (DHW) it is customary to use electricity. As around 70% of electricity is produced by using low quality coal with high greenhouse emission, it is beneficial to environment to use solar energy by flat-plate solar collectors for heating of DHW in a solar DHW system (SDHWS). The SDHWS with variable tilt fla...

In this study, the possibilities to decrease energy consumption of a residential building in Serbian conditions are analyzed. The building uses electricity for space heating system, heating of domestic hot water, lighting, and for other electric equipment. The electrical energy is generated by photovoltaics (PV) system and it may be consumed by the...

In this study we present method for determination of exposure dose on human head during computer tomography (CT) scanning procedure. Method is based on scan data obtained by CT. The gray level of image is converted to attenuation coefficient distribution in the head model. The exposure dose is calculated using this model data by Monte Carlo method...

In this paper the synthesis of the predictive controller for control of the nonlinear object is considered. It is supposed that the object model is not known. The method is based on a digital recurrent network (DRN) model of the system to be controlled, which is used for predicting the future behavior of the output variables. The cost function whic...

Predicting water quality is the key factor in the water quality management of reservoirs. Since a large number of factors affect the water quality, traditional data processing methods are no longer good enough for solving the problem. The dissolved oxygen (DO) level is a measure of the health of the aquatic system and its prediction is very importa...

High-gradient magnetic separation (HGMS) has attracted considerable attention in recent time, both experimentally and theoretically. It has established itself as a powerful technique for the manipulation of particles with magnetic properties. In the present study, analytical and numerical analysis of magnetic separation of cardiomyocytes (CMs) is p...

Over the past several decades, concerns have been raised over the possibility that the exposure to extremely low frequency electromagnetic fields from power lines may have harmful effects on human and living organisms. This work involved the computation of the magnetic field generated by 110kV overhead power lines using a normalized radial basis fu...

Buildings consume 40% of primary energy and are responsible for 36% of greenhouse gas (GHG) emissions. Therefore, reducing energy consumption in buildings can lead to large energy savings, and thus to a reduction in GHG emissions and environmental protection. Nearly zero energy buildings have great potential for a significant reduction in energy co...

The objective of this study is to develop a feedforward neural network (FNN) model to predict the dissolved oxygen in the Gruža Reservoir, Serbia. The neural network model was developed using experimental data which are collected during a three years. The input variables of the neural network are: water pH, water temperature, chloride, total phosph...

Over the past several decades, concerns have been raised over the possibility that the exposure to extremely low frequency electromagnetic fields from power lines may have harmful effects on human and living organisms. This paper presents novel approach based on the use of both feedforward neural network (FNN) and adaptive network-based fuzzy infer...

This paper presents novel approach based on the use of both radial basis function (RBF) network and adaptive network-based fuzzy inference system (ANFIS) to estimate electric and magnetic fields around an overhead power transmission lines. An RBF and ANFIS used to simulate this problem were trained using the results derived from the previous resear...

According to the contemporary epidemiological researches, there are some indications that extremely low frequency electromagnetic fields harm human health which has been proved through numerous scientific studies published in recent years. Today, most countries use the ICNIRP guidelines and Council Recommendation as the scientific basis for their r...

In the context of electrostatic nuisance the everyday use of motor vehicles gives rise to persistent and often uncomfortable shocks to the people using them. The check of sensibility of motor vehicles upon static electricity discharges, and electrostatic discharge simulator, prepared for such studies is described in this paper.

Using Charge Simulation Method the electromagnetic field distribution of the line current conductor above semi-conducting half-space is determined.

One of the main acoustic problems regarding motor vehicles is the identification if individual sources of noise level which the passanger percieves as a global level. Thereby, one should have in mind that the total noise in vehicle represents the loghatitmic sum oh components, not the algebric one. If the identification of noise sources is performe...