doc. Ing. Vítězslav Máša, Ph.D.
E-mail:   Vitezslav.Masa@vut.cz  Dept.:   Institute of Process Engineering Dept. of Process Engineering Position:   Associate Professor Room:   D5/460

Supervised courses:

• Application of FEM (KAM)
• Design and Control of Processes (KPJ)
• Experimental Methods (KEM)
• Hydraulic Processes (KHL)
• Thermodynamic Engineering (KS1)

Publications:

• MÁŠA, V.; STEHLÍK, P.; TOUŠ, M.; VONDRA, M.:
  Key pillars of successful energy saving projects in small and medium industrial enterprises, PERGAMON-ELSEVIER SCIENCE LTD
  journal article in Web of Science
• VONDRA, M.; MÁŠA, V.; BOBÁK, P.:
  The energy performance of vacuum evaporators for liquid digestate treatment in biogas plants, PERGAMON-ELSEVIER SCIENCE LTD
  journal article in Web of Science
• MÁŠA, V.; BOBÁK, P.; VONDRA, M.:
  Potential of gas microturbines for integration in commercial laundries, Springer Berlin Heidelberg
  journal article in Web of Science
• MÁŠA, V.; KUBA, P.:
  Efficient use of compressed air for dry ice blasting, Elsevier
  journal article in Web of Science
• MÁŠA, V.; TOUŠ, M.; PAVLAS, M.:
  Using a utility system grey-box model as a support tool for progressive energy management and automation of buildings, Springer
  journal article in Web of Science
• MÁŠA, V.; BOBÁK, P.; STEHLÍK, P.; KUBA, P.:
  Analysis of energy efficient and environmentally friendly technologies in professional laundry service,
  Clean Technologies and Environmental Policy, Vol.15, (2013), No.3, pp.445-457, ISSN 1618-954X, Springer-Verlag
  journal article - other

List of publications at Portal BUT

Abstracts of most important papers:

• MÁŠA, V.; STEHLÍK, P.; TOUŠ, M.; VONDRA, M.:
  Key pillars of successful energy saving projects in small and medium industrial enterprises, PERGAMON-ELSEVIER SCIENCE LTD
  journal article in Web of Science
  • Four pillars of effective energy saving projects in SMEs were identified. • The four pillars are: the expertise, operational data, modeling and methodology. • An appropriate degree of simplification allows wider use of modeling and simulation. • A specialized testing facility is a great benefit for the data acquisition.
• VONDRA, M.; MÁŠA, V.; BOBÁK, P.:
  The energy performance of vacuum evaporators for liquid digestate treatment in biogas plants, PERGAMON-ELSEVIER SCIENCE LTD
  journal article in Web of Science
  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 fossil fuel consumption that is needed for transporting LD. However, the utilization of vacuum evaporation must be reasonable, and a comprehensive study should precede the integration of evaporation technology in a particular BGP. For this purpose, this study compares selected parameters of three types of industrial evaporators which may be suitable for LD thickening. Furthermore, this study provides a mathematical model that describes the mass and energy balances of the chosen evaporators and is able to evaluate their energy performance for a given set of input variables. It was concluded that the forced-circulation evaporator has the highest energy requirements and also requires a high cooling performance. This type of evaporator will be interesting for the plant owners only if the cost of power generation is extremely low. In terms of consumption of energy and cooling duty, the multi-stage flash evaporator is the most efficient and it also requires the least heat transfer area. The falling-film evaporator provides only slightly worse performance.
• MÁŠA, V.; BOBÁK, P.; VONDRA, M.:
  Potential of gas microturbines for integration in commercial laundries, Springer Berlin Heidelberg
  journal article in Web of Science
  Application potential of microturbines moved from back-up sources for electrical energy and island operation systems, and expended as a combined source for electrical energy and heat in commercial facilities and residential premises. In this paper, we wish to present an analysis of gas microturbine integration in a commercial laundry. We opted for a professional laundry care since it is a common representative of a well-known process which requires a lot of energy input. We focus on commercial laundries with a capacity over 1000 kg of processed laundry per shift. This type of laundries is very common. The gas microturbine was considered as a cogeneration unit as it has a process-adequate performance (30 kWe). Its flue gas helps heat main laundry input flows: hot water for the washing machines and hot flue gas for the dryers. Prices of commercial microturbines are still rather high and short payback period may be expected only if very specific conditions are met.
• MÁŠA, V.; KUBA, P.:
  Efficient use of compressed air for dry ice blasting, Elsevier
  journal article in Web of Science
  Dry ice blasting is a technology that requires large amounts of compressed air which is among the most expensive forms of energy currently employed in industries. Compressed air (air of high pressure and volume) accelerates particles of dry ice during the blasting. Our paper presents a comprehensive overview of saving measures which can greatly help decrease energy intensity of the blasting. The paper presents also a novel quantity which helps quantify and evaluate energy consumption of dry ice blasting.
• MÁŠA, V.; TOUŠ, M.; PAVLAS, M.:
  Using a utility system grey-box model as a support tool for progressive energy management and automation of buildings, Springer
  journal article in Web of Science
  The research presented here is focused on improving energy management in a building complex through analytical and empirical modelling of its utilities. First, we introduce current European policy on energy savings in buildings. The modelling starts with a literature review and a thorough study on a heating and cooling system of a particular building complex—the National Theatre in Prague, Czech Republic. Standard building automation and control systems cannot optimize the building’s operations to the fullest and thus do not provide the best cost savings possible. A mathematical model of the energy system and its integration into a building control system is an essential prerequisite for any optimization here. The development of a model which can be integrated into a control system during real-time operation of the building is a very complicated task. Our paper presents a procedure to develop such a model and methods to apply it in a real-life operation. First, the mathematical model is implemented in a simulation tool, which enables an efficiency evaluation of the system. This simulation tool offers especially important support for building automation and control systems when deciding the most effective operation of heat or cold utilities. The model greatly helps in monitoring and optimizing daily offtake limits for natural gas, which is highly appreciated by the building’s technical management. Our practical applications of the model show new possibilities for simulation and optimization calculations which are completely unique in building management systems so far.