Research Fields


At the Department of Energy Engineering, research is carried out in the field of systems and machinery, connected with transformation and efficient utilization of energy carriers as well as economic, social and natural processes. We contribute to solving social dimensions of energy challenges through basic research, applied research and experimental development for harmonized and environmental-friendly application of energy sources, in order to provide their competitiveness and supply security. Economic basis of research activities is provided by a wide range of industrial R+D projects and by means obtained within grants published by the scientific fund OTKA, by the research office NIH and the EU. Resources are continuously invested in the development of the laboratory. In addition to Hungarian institutions, we co-operate with Canadian, German, French, Portuguese, Polish and South-African universities on various fields. Staff members of the department actively participate in scientific organizations; the editorial board of the periodical Energiagazdálkodás (Energy Management) is located in the department; the International Conference on Heat Engines and Environmental Protection (HEEP) is being organized by our department since 1993 in every second year, now we are organizing the 14th conference in May 27-29, 2019. The diverse research fields of our Department can be classified into the following groups:
machines and equipment of energy systems,
heat and power generation - environmental aspects of energy engineering,
modeling of energy systems.


MACHINES AND EQUIPMENT OF ENERGY SYSTEMS

For operating energy systems in an efficient and environmentally friendly way it is necessary to understand the operation principals well and even development further of involved machines and equipment. Activity scope of our Department deals with questions of modeling, design, development, installation, operation and maintenance of combustion systems, steam generators, boilers, FBC units, steam- and gas- turbines, internal combustion engines (fueled with gasoline, diesel, alcohol, vegetable oil) and refrigerators. In recent years we have been focusing on increasing the energy efficiency, decreasing the emission of pollutants and increasing the share of renewable energy. Regarding the application of renewable resources, we are working on topics such as solar heat and power generation, combustion of biomass and waste, gasification, biogas generation as well as combustion of biomass based liquid and gaseous fuels in IC engines and turbines. Justification of theoretical results by practical experience and experimental results has always been our preference. Our Department has a well-equipped laboratory (György Jendrassik Laboratory) where several measurements can be performed in the previously mentioned fields for demonstration and research purposes. Installation and investigation of new equipment is also possible into the laboratory. We have modern instrumentation and knowledge to examine and qualify the operation of machines and equipment of energy systems as well as special thermal processes. The laboratory is equipped with a measurement system for flue gas emission and other gas composition analysis which is available for measurements out of the laboratory too. Furthermore, our measurement capabilities extend to the following fields: determination of the efficiency and the mass and energy balance of energy systems, as well as the thermal load. Besides the measurements we offer special courses in the field of operation and maintenance of machines and equipment of energy systems. In recent years a lot of research has been done in the field of severe malfunction of heat engines, especially gas engines. In the same field several judicial expert reports has been made every year.

Contact person: Dr. Ferenc Lezsovits

Colleagues working in this research field:

Recent publications:

Kun-Balog, Attila ; Sztankó, Krisztián ; Józsa, Viktor
Pollutant emission of gaseous and liquid aqueous bioethanol combustion in swirl burners
ENERGY CONVERSION AND MANAGEMENT 149 pp. 896-903. (2017),
DOI WoS


Józsa, Viktor ; Kun-Balog, Attila
Stability and emission analysis of crude rapeseed oil combustion
FUEL PROCESSING TECHNOLOGY 156 pp. 204-210. (2017) DOI WoS


András, Urbán ; Matouš, Zaremba ; Milan, Malý ; Viktor, Józsa ; Jan, Jedelský

Droplet dynamics and size characterization of high-velocity airblast atomization
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW 95 pp. 1-11. (2017)
DOI WoS


Szentannai, P ; Szücs, B
Vertical arrangement of SRF particles in a stationary fluidized bed
POWDER TECHNOLOGY 325 pp. 209-217. (2018) DOI WoS


Szabados, György ; Bereczky, Ákos ; Ajtai, Tibor ; Bozóki, Zoltán
Evaluation analysis of particulate relevant emission of a diesel engine running on fossil diesel and different biofuels
ENERGY 161 pp. 1139-1153. (2018)
DOI WoS


Rimkus, Alfredas ; Matijošius, Jonas ; Bogdevičius, Marijonas ; Bereczky, Ákos ; Török, Ádám
An investigation of the efficiency of using O2 and H2 (hydrooxile gas -HHO) gas additives in a ci engine operating on diesel fuel and biodiesel
ENERGY 152 pp. 640-651. (2018)
DOI WoS


HEAT AND POWER GENERATION - ENVIRONMENTAL ASPECTS OF ENERGY ENGINEERING


Today’s modern (consumer) society needs more and more useful energy among which electricity and heat produced in cogeneration has crucial importance. Electricity generation is coupled with significant resource needs and environmental impact; therefore it is continuously being developed considering the requirements of sustainability. The development has two directions; the first is looking for novel solutions, the second is the improvement of already existing systems and equipment mainly to increase efficiency. Research at our Department focuses on these two fields. In recent years several research and development projects have been completed which resulted new technological solutions, more environmentally friendly technologies and more efficient energy supply systems. Research in the field of heat generation has been focusing on operation of customized combustion systems, finding improved solutions for cogeneration, and economical operation of district heating systems. Regarding power generation our experience in research and development stretches from the questions of national strategy to the improvement of power plant efficiency. In this field research is focusing on developing methods that support the economical and environmentally friendly operation. High efficiency power generation can be performed with cogeneration, where utilizing the generated heat has high priority. One of the best ways to utilize heat is district heating; hence part of our research capacity is directed to keeping district heating economic and competitive with other heat supply methods. Our Department participates in R&D projects that support reaching these aims. Different energy production and supply methods have to be sustainable considering all aspects; therefore besides the technological improvements their CO2 intensities and ecological footprints are also investigated. Some of our academic staff participates in the periodic inspection of energy companies as GHG (greenhouse gas) auditors. Besides the traditional energy production technologies, a growing number of technologies using renewable energy sources appear. To support the effective utilization of renewable energy sources a complex renewable energy laboratory has been built at our Department, which can be used to investigate the utilization of solar (heat and power) and wind energy, as well as biofuels. Also, we are focusing on the integration of traditional and renewable energy based technologies; several such systems have been developed and installed by our academic staff.

Contact person: Dr. Péter Bihari

Colleagues working in this research field:

Recent publications:

Imre, AR ; Groniewsky, A ; Gyorke, G
Description of the Metastable Liquid Region With Quintic and Quasi-Quintic Equation of States
INTERFACIAL PHENOMENA AND HEAT TRANSFER 5 : 3 pp. 173-185. (2017) DOI WoS


Groniewsky, A ; Györke, G ; Imre, AR
Description of wet-to-dry transition in model ORC working fluids
APPLIED THERMAL ENGINEERING 125 pp. 963-971. (2017) DOI WoS


Sharafeldin, Mahmoud A ; Gróf, Gyula ; Mahian, Omid
Experimental study on the performance of a flat-plate collector using WO3/Water nanofluids
ENERGY 141 pp. 2436-2444.(2017)
DOI WoS


Mika, László T ; Cséfalvay, Edit ; Németh, Áron

Catalytic Conversion of Carbohydrates to Initial Platform Chemicals: Chemistry and Sustainability
CHEMICAL REVIEWS 118 : 2 pp. 505-613. (2018) DOI WoS


Sharafeldin, M A ; Gróf, Gy
Evacuated tube solar collector performance using CeO2/water nanofluid
JOURNAL OF CLEANER PRODUCTION 185 pp. 347-356. (2018) DOI WoS


Sharafeldin, MA ; Grof, G

Experimental investigation of flat plate solar collector using CeO2-water nanofluid
ENERGY CONVERSION AND MANAGEMENT 155 : 1 pp. 32-41. (2018)
DOI WoS





MODELING OF ENERGY SYSTEMS



In order to understand and improve the machines, equipment and processes of energy systems, it is necessary to model those using modern computational tools. In research projects carried out at our Department we apply commercially available engineering software and our own codes, which apply analytical or numerical computational methods. Active research is carried out in the following fields: control of processes in energy systems, numerical simulation of energy systems (thermodynamic cycles), finite element thermal analysis, computational fluid dynamics problems of heat engines and combustion systems, inverse heat conduction problems, optimization applying soft computing methods, measurement of thermophysical properties, as well as theoretical aspects and physical-mathematical description of heat conduction.

Contact person: Dr. Pál Szentannai

Colleagues working in this research field:

Recent publications:

Rogolino, P ; Kovács, R ; Ván, P ; Cimmelli, VA
Generalized heat-transport equations: parabolic and hyperbolic models
CONTINUUM MECHANICS AND THERMODYNAMICS 30 : 6 pp. 1245-1258. (2018) DOI WoS


Rieth, Á ; Kovács, R ; Fülöp, T
Implicit numerical schemes for generalized heat conduction equations
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 126 pp. 1177-1182. (2018) DOI WoS


Kovacs, R ; Jozsa, V
Thermal analysis of the SMOG-1 PocketQube satellite
APPLIED THERMAL ENGINEERING 139 pp. 506-513. , 8 p. (2018) DOI WoS Scopus


Kovács, R ; Ván, P
Second sound and ballistic heat conduction: NaF experiments revisited
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 117 pp. 682-690. (2018) DOI WoS


Kovács, Róbert
Analytic solution of Guyer-Krumhansl equation for laser flash experiments
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 127 pp. 631-636. (2018) DOI WoS


Kovács, Róbert ; Ván, Péter
Thermodynamical consistency of the dual-phase-lag heat conduction equation
CONTINUUM MECHANICS AND THERMODYNAMICS 30 : 6 pp. 1223-1230. (2018)
DOI Scopus


Györke, G ; Deiters, UK ; Groniewsky, A ; Lassu, I ; Imre, AR
Novel classification of pure working fluids for Organic Rankine Cycle
ENERGY 145 pp. 288-300. (2018) DOI WoS