doc. Ing. Zdeněk Jegla, Ph.D.
E-mail:   jegla@fme.vutbr.cz  Dept.:   Institute of Process Engineering Dept. of Process Engineering Position:   Associate Professor Room:   A1/0923

Supervised courses:

• Basics of Process Equipment Modelling in 3D (K3D-A)
• CAD Process Simulations (KCD)
• CAD Projection of Heat Transfer Equipment for Processes and Power Systems (KT0)
• Design of Process and Power Systems (KNP)
• Process Systems Engineering (DPI)
• System Approaches for Process and Power Industry (9SPE)
• System Approaches for Process and Power Industry (KS3)
• Technological Units for Processing Industry (KS2)
• (BXA011)

Publications:

• JEGLA, Z.; REPPICH, M.:
  Verification of new thermal calculation method by industrial radiant chamber measurement,
  Proceedings of the 23rd International Conference ENGINEERING MECHANICS 2017, pp.418-421, ISBN 978-80-214-5497-2, (2017), Brno University of Technology, Institute of Solid Mechanics, Mechatronics and Biomechanics
  conference paper
  akce: ENGINEERING MECHANICS 2017, Svratka, 15.05.2017-18.05.2017
• TUREK, V.; FIALOVÁ, D.; JEGLA, Z.:
  Efficient flow modelling in equipment containing porous elements,
  Chemical Engineering Transactions, pp.487-492, ISBN 978-88-95608-42-6, (2016), Aidic Servizi, S.r.l.
  conference paper
  akce: 19th Conference on Process Integration, Modelling and Optimisation for Energy Saving and Pollution Reduction (PRES 2016), Praha, 27.08.2016-31.08.2016
• JEGLA, Z.; KILKOVSKÝ, B.; TUREK, V.:
  Novel approach to proper design of combustion and radiant chambers, Elsevier
  journal article in Web of Science
• JEGLA, Z.; HÁJEK, J.:
  Tepelné zatížení v oblasti změny průměru trubkového hadu v radiační komoře ohřevné pece,
  CHEMagazín, Vol.26, (2016), No.1, pp.30-33, ISSN 1210-7409
  journal article - other
• TUREK, V.; FIALOVÁ, D.; JEGLA, Z.; KILKOVSKÝ, B.:
  Efficient 2D Model of Flow Distribution in Dense Tube Bundles,
  Proceedings of the 18th International Conference on Process Integration, Modelling and Optimisation for Energy Saving and Pollution Reduction (PRES 2015), pp.1177-1182, ISBN 978-88-95608-36-5, (2015), Aidic Servizi Srl
  conference paper
  akce: 18th International Conference on Process Integration, Modelling and Optimisation for Energy Saving and Pollution Reduction (PRES’15), Kuching, 23.08.2015-27.08.2015
• JEGLA, Z.; VONDÁL, J.; HÁJEK, J.:
  Standards for fired heater design: An assessment based on computational modelling, Elsevier
  journal article in Web of Science
• KILKOVSKÝ, B.; STEHLÍK, P.; JEGLA, Z.; KAPUSTENKO, P.; ARSENYEVA, O.; TOVAZHNYANSKY, L.:
  Heat exchangers for energy recovery in waste and biomass to energy technologies - I. Energy recovery from flue gas, ELSEVIER
  journal article in Web of Science

List of publications at Portal BUT

Abstracts of most important papers:

• JEGLA, Z.; REPPICH, M.:
  Verification of new thermal calculation method by industrial radiant chamber measurement,
  Proceedings of the 23rd International Conference ENGINEERING MECHANICS 2017, pp.418-421, ISBN 978-80-214-5497-2, (2017), Brno University of Technology, Institute of Solid Mechanics, Mechatronics and Biomechanics
  conference paper
  akce: ENGINEERING MECHANICS 2017, Svratka, 15.05.2017-18.05.2017
  The paper presents heat flux measurements performed on industrial radiant chamber of operated fired heater. Obtained measured results are used for verification of a new thermal calculation method for proper design and evaluation of combustion and radiant chambers containing inbuilt tubular heat transfer system. The very good agreement of results achieved using the proposed thermal calculation method with measured industrial data confirms its excellent ability to predict the real thermal behavior of combustion or radiant chambers employing up-to-date industrial complex systems of low emission burners.
• TUREK, V.; FIALOVÁ, D.; JEGLA, Z.:
  Efficient flow modelling in equipment containing porous elements,
  Chemical Engineering Transactions, pp.487-492, ISBN 978-88-95608-42-6, (2016), Aidic Servizi, S.r.l.
  conference paper
  akce: 19th Conference on Process Integration, Modelling and Optimisation for Energy Saving and Pollution Reduction (PRES 2016), Praha, 27.08.2016-31.08.2016
  Possible ways to model flow distribution and pressure drop in process and power equipment containing porous elements (e.g. tube sheets of dense tube bundles of recuperative heat exchangers, matrices of regenerative heat exchangers, packed beds of catalytic converters, etc.) are discussed. A simplified, hybrid flow distribution and pressure drop model based on finite volume method and applicable to a wide variety of equipment is proposed. Given the fact that the model in question is intended to be utilised primarily in optimisation algorithms, emphasis is placed on both obtaining accurate-enough data within relatively short time frames and ease of automation of the process. A proof-of-concept implementation of the model is discussed alongside improvements regarding solution convergence and solution efficiency in general that are critical in order to make the model commercially viable given its intended application.
• JEGLA, Z.; KILKOVSKÝ, B.; TUREK, V.:
  Novel approach to proper design of combustion and radiant chambers, Elsevier
  journal article in Web of Science
  Combustion and radiant chambers with inbuilt heat transfer surfaces are integral parts of a wide range of process and power equipment such as fired heaters, power boilers, or incinerator furnaces. Operating problems that many of these combustion chambers suffer from are typically due to the design procedures using data of insufficient accuracy regarding the calculated local heat transfer data in individual parts of the chambers equipped with modern low-NOx burners. These problems, obviously, force the designers to devise more accurate design procedures for the respective equipment. The paper therefore discusses the main results obtained so far in the course of a several years long research effort and presents a basic outline of an up-to-date, novel approach to proper design of combustion and radiant chambers with inbuilt heat transfer surfaces. The three most important and – considering the current design practice – also original components of the presented novel approach which significantly improve the quality of the resulting combustion chamber designs are (i) experimental determination of the actual burner heat flux distribution, (ii) determination of the actual fuel burnout profile of the burner from the obtained heat flux profile using the validated MPF model, and (iii) utilisation of the respective fuel burnout profile in the course of design of the combustion chamber and its inbuilt heat transfer surfaces together with calculation of the local heat flux distribution via the plug-flow-based method, thus replacing the currently used design methods based on the “well stirred” models.
• JEGLA, Z.; HÁJEK, J.:
  Tepelné zatížení v oblasti změny průměru trubkového hadu v radiační komoře ohřevné pece,
  CHEMagazín, Vol.26, (2016), No.1, pp.30-33, ISSN 1210-7409
  journal article - other
  Different parts of the fired heater tube coils, in which the heated process fluid flows, are exposed to different levels of operating load during fired heater operating which causes a difference in the lifetime usage of the individual parts of the coils. Therefore it is necessary to have knowledge about the load of individual parts and components of coils and values of the load for reliable fired heater operation. Contribution presents a method of calculation analysis of the heat flux of those parts of tube coils where a change of the tube diameter is present and highlights some of the design and operational interactions, which change of the coil diameter causes, when is positioned in the combustion chamber i.e. the radiant chamber of a fired heater.
• JEGLA, Z.; VONDÁL, J.; HÁJEK, J.:
  Standards for fired heater design: An assessment based on computational modelling, Elsevier
  journal article in Web of Science
  The paper presents data from CFD modelling of wall heat flux distribution over the lengths and circumferences of tubes in the radiant chamber of a vertical cylindrical fired heater. These results are then compared to design parameters used in American Petroleum Institute (API) Standard 560. 2D parametric analyses of the effect of commonly encountered types of tube deformations on heat flux uniformity are discussed as well.