Mirko M. Stojiljkovic

University of Niš, Niš, Serbia · Faculty of Mechanical Engineering in Niš

The objective of the research was to compare various types of clay blocks in terms of construction thermal inertia parameters and the influence they would have on the energy performance of the office building located in Nis. For this, a new type of clay block with increased mass is proposed, and a custom approach for determining all relevant indica...

Simulation-assisted operation can offer flexibility in terms of prioritizing either building energy consumption or occupant thermal comfort, and in most cases, it can address these issues simultaneously. Simulation-assisted operation is the type of operation that uses the knowledge of future disturbances acting on the building, thus allowing the HV...

Educational buildings represent an indivisible part of every society, and it is necessary to make them energy efficient. In the current research on the energy-efficient retrofit of school buildings, the impact of several passive design strategies is studied. These interventions include improvement of the building envelope characteristics and parame...

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...

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...

The existing public buildings in Serbia provide many opportunities for energy-efficient improvements and energy savings. Based on a computer simulation using the SketchUp and EnergyPlus software packages, the energy consumption of existing primary schools in Niš, Serbia. The parametric study included interventions on the building envelope (thermal...

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...

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...

One of the possible ways to improve balance between building energy consumption and occupant thermal comfort in existing buildings is to use simulation-assisted operation of HVAC systems. Simulation-assisted operation can be formulated as a type of operation that implements knowledge of future disturbance acting on the building and that enables ope...

The need for primary energy has almost tripled in the past 30 years [1]. Energy-efficiency of buildings is the most demanding sector in Serbia, but also the largest energy resource, especially through the potential possibility of renovating existing buildings. The school buildings sector is high on the priority list related to energy savings and re...

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...

Multi-objective design and operation optimization of energy supply systems with respect to costs, energy efficiency and environmental indicators is very important, yet difficult and challenging task. The assumption of cost-optimal operation may impose the necessity for bi-level problems. This paper presents a methodology to formulate and solve mult...

Traditional methods of analysis and calculation of complex thermal systems are based on the first law of thermodynamics. These methods use energy balance for a system. In general, energy balances do not provide any information about internal losses. In contrast, the second law of thermodynamics introduces the concept of exergy, which is useful in t...

Biomass is a renewable energy source that can be used as a substitute for fossil fuels in the production of heat. The current condition of renewable energy source in Serbia is bad although Serbia has good potential for development. The potential of forest biomass as another important resource of biomass in Serbia lies in the processing of 1.5 milli...

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...

Improving energy performance of buildings is one of the most important tasks for reaching sustainability. Assessing building energy consumption is performed more often with specialized simulation tools. Sensitivity analysis proved to be a valuable tool for creating more reliable and realistic building energy models and better buildings. This paper...

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...

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...

In this paper, a methodology for multi-objective optimization of trigeneration plants is presented. It is primarily applicable to the systems for buildings’ energy supply characterized by high load variations on daily, weekly and annual bases, as well as the components applicable for flexible operation. The idea is that this approach should enable...

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...

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...

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...

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...

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...

Tri-generation systems are used to simultaneously produce electrical, heating. and cooling energy. These systems are usually more efficient than conventional systems for separate production and have smaller distribution losses since they are often located closer to the consumer. For achievement of the best technical and/or financial results, tri-ge...

The cement industry contributes about 5% to global anthropogenic CO2 emissions, and is thus an important sector in CO2-emission mitigation strategies. Carbon dioxide is emitted from the calcination process of limestone, from combustion of fuels in the kiln, and from the coal combustion during power generation. Strategies to reduce these CO2 emissio...

The cement industry contributes about 5% to global anthropogenic CO2 emissions, and is thus an important sector in CO2-emission mitigation strategies. Carbon dioxide is emitted from the calcination process of limestone, from combustion of fuels in the kiln, and from the coal combustion during power generation. Strategies to reduce these CO2 emissio...

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...

In this paper we present achieved results of the Laboratory for Combustion of the Faculty of Occupational Safety in Ni? Serbia, obtained by analyzing and designing of technologies and machines for manufacturing of briquettes and pellets by dry and wet process and identification of technological parameters of briquette manufacturing from waste bioma...