A5056748031- Refrigeration and Air Conditioning Technologies
- Building Energy and Comfort Optimization
- Aerodynamics and Fluid Dynamics Research
- Thermoregulation and physiological responses
- Vehicle emissions and performance
- Distributed systems and fault tolerance
- Real-Time Systems Scheduling
- Infection Control and Ventilation
- Respiratory Support and Mechanisms
- Engine and Fuel Emissions
- Mechanical and Thermal Properties Analysis
- Lattice Boltzmann Simulation Studies
- Distributed and Parallel Computing Systems
- Advanced Manufacturing and Logistics Optimization
- Power Transformer Diagnostics and Insulation
- Aerosol Filtration and Electrostatic Precipitation
- Software System Performance and Reliability
- Aerodynamics and Acoustics in Jet Flows
- Heat Transfer and Optimization
- Wind and Air Flow Studies
- Infrared Thermography in Medicine
- Vacuum and Plasma Arcs
- Fluid Dynamics and Turbulent Flows
- Climate Change and Health Impacts
- Electric and Hybrid Vehicle Technologies
Brno University of Technology
2013-2024
University of Pardubice
2017
VSB - Technical University of Ostrava
2005-2007
University of Illinois Urbana-Champaign
2004
MathWorks (United States)
2004
Evaluation of motor oils is given a big attention due to fact that during the years it was proven lubrication key factor influencing service life vehicles and industrial engines. Motor oil must fully serve in various operational conditions (such as city traffic with frequent braking acceleration) well different climatic (arctic winters or tropical summer heat). Therefore, change should be optimized order ensure proper engine efficiency extend its life.The article presents result testing two...
Thermal environment in a vehicular cabin significantly influence drivers' fatigue and passengers' thermal comfort. This is traditionally managed by HVAC system that distributes air modifies its properties. In order to simulate behaviour, amount of the led through car vents must be determined. The aim this study was develop methodology measure airflow from vents, consequently calculate corresponding distribution coefficients. Three climatic cases were selected match European winter, summer,...
The paper presents the development of a mathematical model and simulation tool for transient prediction indoor climate heat loads in car cabin, under real operating conditions. main objectives were to develop which facilitates, example, design cabin HVAC system or an on-line control. is based on energy balance between outdoor environment accounting conduction, convection shortwave longwave radiation. Inside exchange calculated human body, air zone, interior surfaces incoming from system....
Recently the author presented paper describing a car cabin heat load model for prediction of environment. The allowed to simulate transient behavior cabin, i.e. radiant temperature surfaces, air and relative humidity. was developed in Dymola built on basic principles thermodynamics balance equations. validated by experiments performed Škoda Felicia during various operational conditions. In this authors present parametric study investigating influence material properties Matlab version has...
Views Icon Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Twitter Facebook Reddit LinkedIn Tools Reprints and Permissions Cite Search Site Citation František Prinz, Jakub Elcner, Jan Pokorný, Miroslav Jícha; Lattice Boltzmann simulation of the laminar-turbulent transition in a constricted tube. AIP Conf. Proc. 14 February 2023; 2672 (1): 020018. https://doi.org/10.1063/5.0121340 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends...
At the present time many embedded and real systems require access to increasingly larger amount of data. Data structures can not be fully application dependent as usual more sophisticated data processing algorithms are required. Placing conventional database principles into environment is an obvious way but it very difficult achieve guaranteed services because various components compete for system resources. Our objective design experimental real-time which would suitable enough study most...
Cabin HVAC (Heating Ventilation and Air-conditioning) systems have become an essential part of personal vehicles as demands for comfortable transport are still rising. In fact, 85 % the car trips in Europe shorter than 18 km last only up to 30 minutes. Under such conditions, unit cannot often ensure desired cabin environment passengers prone experience thermal stress. For this reason, additional comfort systems, heated or ventilated seats, available on market. However, there is no...
The aim of this study was to identify a set operating points fan built in ventilation system our test car. These are given by the pressure characteristics and defined drop HVAC (air ducts vents) volumetric flow rate air. To cover wide range drops situations, four cases vent flaps setup were examined: (1) all vents opened, (2) only central closed (3) opened (4) closed. different flows, each case measured at least for speeds voltage. It observed that difference is proportional voltage strongly...
The use of protective clothing under extreme conditions leads to heat stress with undesired consequences on human physiology. As a prevention measure, thermal indices and thermophysiological models have been developed. Based these indices, it is possible estimate the time limits for staying risky conditions, e.g., by predicted rectal temperature whose value one most important parameters used assessing stress. This article focused comparison mean skin prediction realized Fiala-based model...
A coupled model of human physiology and thermal comfort was developed in Dymola/Modelica. coupling combines a modified Tanabe by Zhang. The Coupled allows predicting the sensation both local overall from boundary conditions representing ambient personal factors. aim this study to compare prediction with Fiala experimental data. Validation data were taken literature, mainly validation manual software Theseus–FE [1]. In paper for very light physical activities (1 met) indoor environment...
The amount of air supplied by ventilation system (HVAC system) a car into cabin is one the main parameters for correct simulation and prediction heat load. This not based only on current setting HVAC system, but also actual operating conditions speed car. authors therefore carried out experiments in passenger real traffic, while observing flap mixing chamber. In subsequent analysis defined dependence airflow rate Obtained empirical formulas were then used as part code which calculates data...
The objective of this work is to compare the accuracy several approximate models radiative properties for prediction transfer in air arc plasma at temperatures range 300 - 25 000 K and pressure 0.1 MPa. Calculated absorption coefficients are used generate parameters different models. inside cylindrically symmetrical with prescribed temperature profile was studied. equation solved using P1 SP3 approximations, calculated source term energy (net emission) compared results obtained by spectral...
The use of personal protective equipment (PPE) is essential to protect the human body in hazardous environments or where there a risk CBRN agents. However, PPE also poses barrier evaporative heat dissipation, therefore increasing accumulation body. In our research, we investigated applicability thermophysiological models for prediction thermal strain and permissible working time contaminated environment when usage ensembles required. We relationship between insulation characteristics four...
The aim of our research is to calibrate and verify the software Virtual Testing Stand Car Cabin using climatic chamber tests. standalone executable developed in Matlab for prediction cabin environment thermal heat load by time-efficient balance model. main limitation simulation method a simplified convection scheme inside empirical correlations instead CFD simulations. In this paper we present first preliminary tests calibration process verification results. Tests were carried out car Skoda...
Thermal comfort evaluation based on the Comfort zone diagram is relatively new and promising method [1] developed by Hakan O. Nilsson [2]. The was mainly for non uniform indoor environments [3] such as vehicle cabins [4]. Mean thermal vote (MTV) correlated with equivalent temperature, which typically measured a manikin clothing or sensor heated surface. This fact advantage of this because prediction measurable physical phenomenon called dry heat loss. essence inspired us to develop...
Thermal comfort and also reduction of energy requirements air-conditioning system in vehicle cabins are currently very intensively investigated up-to-date issues. The article deals with two approaches modelling car cabin environment; the first model was created simulation language Modelica (typical 1D approach without geometry) second one specialized software Theseus-FE (3D geometry). Performance capabilities this tools demonstrated on example results from simulations compared real climate...