Recent Submissions

  • Review of Design and Modeling of Regenerative Heat Exchangers 

    Kilkovský, Bohuslav (MDPI, 2020-02-09)
    Heat regenerators are simple devices for heat transfer, but their proper design is rather difficult. Their design is based on differential equations that need to be solved. This is one of the reasons why these devices are ...
  • Thermal load non-uniformity estimation for superheater tube bundle damage evaluation 

    Naď, Martin; Jegla, Zdeněk; Létal, Tomáš; Lošák, Pavel; Buzík, Jiří (EDP Sciences, 2018-03-14)
    Industrial boiler damage is a common phenomenon encountered in boiler operation normally which usually lasts several decades. Since boiler shutdown may be required because of localized failures, it is crucial to predict ...
  • Tightness of flange joints: A case study 

    Lošák, Pavel; Létal, Tomáš; Naď, Martin; Pernica, Marek (IOP Publishing, 2020-04-01)
    One of the negative technological factors that often have a significant impact on the environment is the leakage of operating media (so-called fugitive emissions), which most often occurs at different separable joints. ...
  • Simplified approach for creep evaluation in superheaters 

    Naď, Martin; Lošák, Pavel; Létal, Tomáš; Pernica, Marek (IOP Publishing, 2020-04-01)
    This paper is focused on the estimation of temperature distribution on superheater tube bundles for the consequent creep damage evaluation. The precision of estimated temperatures is very important because it significantly ...
  • Computation of temperature field by cell method and comparing with commercial software 

    Pernica, Marek; Létal, Tomáš; Lošák, Pavel; Naď, Martin (IOP Publishing, 2020-04-01)
    This paper deals with the temperature field of the shell and tube heat exchanger with segmental baffles. Two different types of shell and tube heat exchangers were analysed by a numerical model for thermal-hydraulic rating ...
  • Biowaste Treatment and Waste-to-Energy - Environmental Benefits 

    Pavlas, Martin; Dvořáček, Jan; Pitschke, Thorsten; Peche, René (MDPI, 2020-04-17)
    Biowaste represents a significant fraction of municipal solid waste (MSW). Its separate collection is considered as a useful measure to enhance waste management systems in both the developed and developing world. This paper ...
  • Practical energy retrofit of heat exchanger network not containing utility path 

    Jegla, Zdeněk; Freisleben, Vít (MDPI, 2020-05-28)
    The paper presents a method developed for the energy retrofit of specific Heat Exchanger Networks not containing Utility Paths. This useful and highly practically oriented method involves a systematic approach to obtaining ...
  • Indirect Convective Solar Drying Process of Pineapples as Part of Circular Economy Strategy 

    Azouma, Yaovi Ouézou; Drigalski, Lynn; Jegla, Zdeněk; Reppich, Marcus; Turek, Vojtěch; Weiß, Maximilian (MDPI AG, 2019-07-24)
    This study investigates the industrial-scale application of a simple convective solar drying process of pineapples as part of a circular economy strategy for developing countries. A renewable energy concept is presented, ...
  • The energy performance of vacuum evaporators for liquid digestate treatment in biogas plants 

    Vondra, Marek; Máša, Vítězslav; Bobák, Petr (PERGAMON-ELSEVIER SCIENCE LTD, 2018-03-01)
    Vacuum evaporation is an efficient method for reducing the volume of liquid digestate (LD) from biogas plants (BGP). Furthermore, thickening LD in BGP contributes to the efficient utilization of waste heat and also reduces ...
  • Nonlinear Finite Element Analysis-based flow distribution and heat transfer model 

    Létal, Tomáš; Turek, Vojtěch; Babička Fialová, Dominika; Jegla, Zdeněk (MDPI, 2020-04-02)
    A new strategy for fast, approximate analyses of fluid flow and heat transfer is presented. It is based on Finite Element Analysis (FEA) and is intended for large yet structurally fairly simple heat transfer equipment ...
  • Analysis of Fired Equipment within the Framework of Low-Cost Modelling Systems 

    Babička Fialová, Dominika; Jegla, Zdeněk (MDPI AG, 2019-02-07)
    Fired equipment suffers from local overloading and fouling of heat transfer surfaces, products are not of the required quality, and operating costs are increased due to the high pressure drop of process fluids. Such ...
  • Municipal Waste Composition Analysis – Approaches to and Solutions for Czech Waste Management 

    Kropáč, Jiří; Gregor, Jiří; Pavlas, Martin (University of Maribor Press, 2020-05-21)
    Current trends in European Union waste management (WM) have resulted in the unified European Reference Model on Waste. The European Commission and European Environment Agency commissioned research subjects to develop the ...
  • The Difficulties of Designing Technical-Economic Models for Czech Wastewater Treatment Plants 

    Zejda, Vojtěch; Gregor, Jiří; Kropáč, Jiří; Václavková, Šárka (University of Maribor Press, 2020-05-21)
    This paper describes the main points that must be faced when preparing a methodology for a techno-economic model of a wastewater treatment plant (WWTP). The model and the design are meant to be applied to real WWTP ...
  • Evaluation of the technical condition of medium-sized boilers 

    Lošák, Pavel; Létal, Tomáš; Buzík, Jiří; Naď, Martin (EDP Sciences, 2018-03-14)
    The recent trend in the steam and electricity production has been both to increase the efficiency of the facility and to keep tightening legislation concerning emission limits. The lifetime of energy equipment is greatly ...