Goran Vučković's research while affiliated with University of Niš and other places

Publications (28)

Article
Primary energy is the quantity often used to express the total amount of consumed or saved energy. It is especially important for certification and standards compliance evaluation of buildings. In order to accurately assess primary energy consumption and savings of building retrofit measures, one needs adequate models that can be based on the knowl...
Article
In a time of permanent care for environmental protection, energy consumption and conservation of resources, heat pumps are becoming increasingly important as a technology for reducing greenhouse gas emissions while preservation thermal comfort in build environment. This paper presents the experimental results of air-source heat pump in different re...
Article
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The use of air-source heat pumps (ASHP) is increasing to meet the energy needs of residential buildings, and manufacturers of equipment have permanently expanded the range of work and improved the efficiency in very adverse outdoor air conditions. However, in the time of a wide range of different technologies, the problem of using ASHP, from a tech...
Article
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Data-driven black-box surrogate models are widely used in research related to buildings energy efficiency. They are based on machine learning techniques, learn from available data, and act as a replacement for or an addition to complex and computationally intensive knowledge-based models. Surrogate models can predict energy demand, indoor air tempe...
Article
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Relying on coal as primary fuel in thermal power plants represents an unsustainable concept due to limited coal reserves and a negative environmental impact. Efficient utilization of coal reserves and a request for minimization of irreversibilities are imperative for thermal power plants operation. Numerous studies have shown that a steam boiler is...
Article
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Buildings are significant energy consumers and provide a notable potential to reduce primary energy consumption and increase energy efficiency. Cost-effectiveness of energy efficiency projects is of crucial importance for their implementation. Cost-optimality of different packages of energy retrofit measures is studied across the European Union, bu...
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The reduction of energy demand for space cooling requires adequate solutions at building and built environment scales in order to achieve sustainability goals. Since many existing buildings have inadequate envelopes for reducing heat gains in summer and heat losses in winter, environmentally friendly renovation tech-niques have to be considered. Th...
Article
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The total exergy destruction occurring in a component is not only due to the component itself (endogenous exergy destruction) but is also caused by the inefficiencies of the remaining system components (exogenous exergy destruction). Hence care must be taken in using the total exergy destruction of a component for making decisions to optimize the o...
Article
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Exergoeconomic methods provide an effective approach for identifying, evaluating and reducing thermodynamic inefficiencies and costs in an energy system. The aim of this paper is to show the potential for cost reduction on the demand side, using the exergoeconomic method in the example of real processes for coffee roasting. More than 6.5•109 kg of...
Article
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In this paper, experimental data on the drying kinetics of corn in a packed and fluidized bed are presented. Experimental research was conducted on a laboratory apparatus. Corn was used as a material because of its significance in agriculture and the food industry. An analysis of the influence of the operational parameters (the drying medium veloci...
Article
When complex energy systems are analyzed and when a large number of their components is observed, the destruction of exergy related to a single component is dependent on its own properties, but also on the characteristics of other components. The advanced exergy analysis is useful for providing supplementary information on the interaction between t...
Article
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The selection of an appropriate waste treatment scenario is a complex problem in which a set of environmental, economic, and social criteria must be taken into account. Different waste treatment scenarios have different effects on the environment, which is expressed through a variety of environmental indicators. The main problem is to determine the...
Article
Buildings use a significant amount of primary energy and largely contribute to greenhouse gases emission. Cost optimality and cost effectiveness, including cost-optimal operation, are important for the adoption of energy efficient and environmentally friendly technologies. The long-term assessment of buildings-related greenhouse gases emission migh...
Article
Exergy analysis and exergoeconomics are often used to evaluate industrial energy systems performance from the thermodynamic and economic points of view. While the classical exergy analysis can be used to recognize the sources of inefficiency and irreversibilities, so called advanced exergy analysis is convenient for identifying real potential for t...
Article
Conventional exergy analysis pinpoints components and processes with high irreversibility. The advanced exergy-based analysis provides additional information about component interactions and reveals the real potential for improvement of each component constituting a system, as well as of the overall system. Having in mind that in addition to the te...
Article
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A shell and tube heat exchanger (STHE) is one of the most often used apparatuses in chemical industry. One of the main goals of the STHE manufacturers is to improve their exploitation reliability and efficiency. Two approaches to the STHE design improvement are possible: experimental investigation, which is very expensive and time-consuming because...
Article
Full-text available
Exergy analysis is a universal method for evaluating the rational use of energy. It can be applied to any kind of energy conversion system or chemical process. An exergy analysis identifies the location, the magnitude and the causes of thermodynamic inefficiencies and enhances understanding of the energy conversion processes in complex systems. Con...
Article
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Co-generation systems, together with absorption refrigeration and thermal storage, can result in substantial benefits from the economic, energy and environmental point of view. Optimization of operation of such systems is important as a component of the entire optimization process in pre-construction phases, but also for short-term energy productio...
Conference Paper
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Limited resources, harmful effects, increase in costs for environmental protection due to the use of conventional energy sources on one hand and on the other a large hydro-geothermal potential available in the Republic of Serbia indicate the potential for a more intensive use of hydro-geothermal energy. The total thermal power which could be obtain...
Article
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Implementation of co-generation of thermal and electrical energy in district heating systems often results with higher overall energy efficiency of the systems, primary energy savings and environmental benefits. Financial results depend on number of parameters, some of which are very difficult to predict. After introduction of feed-in tariffs for g...
Article
As it is necessary nowadays to have a clear and accurate identification of all the influences affecting costeffective usage of energy resources, increase of energy efficiency, evaluation of economic consequences and impacts of energy usage on the environment, the need for a complex methodology which can be adequately developed is increasing. The su...
Article
Full-text available
This paper presents an on-going research project that aims to identify possibilities for wider use of evaporative cooling in process industry especially the use of evaporative fluid cooler units. Experimental study is performed on small scale evaporative fluid cooler, while the correlation based model has been carried out to explore the detailed he...
Article
In this paper, an iterative procedure for sizing shell-and-tube heat exchangers according to prescribed pressure drop is shown, then the thermo-hydraulic calculation and the geometric optimization for shell and tube heat exchangers on the basis of CFD technique have been carried out. Modeling of shell and tube heat exchangers for design and perform...

Citations

... Urban areas are characterized by dense construction and by impermeable areas which cause multiply negative effects because of the devastation of natural ecosystem [3]. Some of them are: change of microclimate of the cities -the effect of urban heat island, increased possibility of flooding, noise pollution, air pollution, etc. [5]. This can be alleviated by design and construction of green roofs and facades, green areas inside the building and by design where the ground is minimally used by the building, which could affect the spatial organization of public buildings. ...
... Physical exergy represents the maximum useful work derivable as a system attains equilibrium with a reference environment (Ameri et al., 2009;Mitrović et al., 2018). The physical exergy rate can be expressed as: ...
... The main properties of the chosen buildings are shown in Table 1. It should be mentioned that the insulation of the interior walls has not been considered for building A. Reference [43] also describes the buildings and considered retrofit measures. ...
... Thermal effects of GR on runoff are rarely assessed, as most studies focus on building cooling for energy savings (Eksi et al., 2017;Imran et al., 2018;Sharma et al., 2016) or mitigating UHI (Cao et al., 2019;Stamenkovi c et al., 2018). We found that both vegetated roofs released slightly cooler water when compared to a nonvegetated roof. ...
... About 60% of the total energy consumed in the coffee-making process can be attributed to the transportation, roasting, and brewing phase [17]. For an instance, the total aggregated energy (mechanical, electrical, and thermal) used for preparing a 100 ml coffee cup from green coffee beans is reported to be 0.5 kWh or 1.94 MJ [18,19]. Roasting operation is an intensive energy-consuming process that requires temperature ranging from (160-240 • C) for green coffee beans associated with suitable roasting time (8-20 min) to attain appropriate characteristics of the final product corresponding to the degree of roast, i.e., light, medium or dark [20]. ...
... Adequate and accurate information are not provided by conventional exergy analysis, in the aspect of interactions between components of the thermal systems and the real potential of improving the systems are not also revealed [4]. Therefore, care must be taken in applying the results of conventional exergy analysis for optimization of an entire thermal system [5]. These limitations of conventional exergy and exergoeconomic analysis can be prevailed to increase the knowledge of thermal systems by the development of advanced exergy based analysis B5-2 U.G. AZUBUIKE ET AL. [6]. ...
... Exergy analysis does not always show the real losses that can be reduced, while in the case of advanced exergy analysi s, these losses can be identified [21]. The advanced exergy analysis method described in literature sources is used during the research of many industrial processes, such as refrigeration equipment [21] and cogeneration plants [22] and research [23] about the manufacturing of rubber products. The results of these studies showed the benefits of a progressive exergy analysis, because priorities for reducing energy loss are ranked on the basis of exergy destruction. ...
... West and Taylor (1952) [3] studied Effect of pulse flow of water on the heat transfer coefficient within the Reynolds numbers (30,000 to 85,000) in a double tube heat exchanger tube and two (water -water) and (steam-Water) researchers have used pulsed air to get impulsive movement and within different frequencies, their findings explained that heat transfer coefficient of the pulse flow increasingly limited (60 -70%) for a value in steady state at frequency (0.25 c.p.s). Stevanovic., et al. (2001) [4] conducted a numerical study of the flow of turbulent fluid and heat transfer in the heat exchanger type shell and tube using (CFD) have been finding the distribution of speed and temperature in addition to calculating the rate of total heat transfer, researchers found that the optimal distribution of the flow is considered an essential step in the design of the heat exchanger as it leads to higher rate of heat transfer. ...
... These characteristics have been crucial to fluidization finding wide application in many industrial processes such as drying of fine-grained material, transportation of powdered materials, coal combustion [1], freezing of food products etc. Due to the fact that the application of fluidization in the industry requires as precise and simple methods as possible so as to calculate the relevant parameters a large number of papers have been published in recent years that, mainly through experimental research, deal with this area [2,3,7,11]. ...
... The shell and tube heat exchanger design was explained by Gay et al. (Bell 1963) who worked on heat transfer, while Halle et al. (Gay et al. 1976) and Pekdemir et al. investigated pressure drop (Halle et al. 1988;Pekdemir et al. 1994;Li & Kottke 1998d). Nowadays, the numerical methods have become an economical alternative for the research of STHE, and through a detailed flow pattern and a temperature field, it could be obtained with much less difficult (Seemawute & Eiamsa-ard 2010;Rhodes & Carlucci 1983;Huang et al. 2001;Stevanovic et al. 2001). The collective effect of all the above parameters on heat transfer is quite interesting to design STHE with the optimistic approach. ...