Browsing by Author "Šafařík Pavel"
Now showing 1 - 5 of 5
Results Per Page
Sort Options
- ItemDependence of the isobaric specific heat capacity of water vapor on the pressure and temperature(2016) Vestfálová Magda; Šafařík Pavel
- ItemDetermination of the applicability limits of the ideal gas model for the calculation of moist air properties(EDP Sciences, 2018) Vestfálová Magda; Šafařík PavelThe submitted paper deals with the finding of such moist air states in which the components of moist air and hence the humid air itself can be described by the ideal gas model while maintaining a predefined accuracy. Both components of moist air (dry air and water vapor) can be described by a model of ideal gas at sufficiently low pressures and sufficiently high temperatures. In the paper, we are looking for such combinations of pressures and temperatures for both components, where the relative deviation in the density calculation using the ideal gas model does not exceed the desired value. In addition, on the basis of the mixture theory, such moist air conditions (characterized by pressure, temperature and specific humidity) are searched, on which the accuracy of the calculation meets the required conditions. Subsequently, diagrams are constructed that can be used to help identify the interface between a moist air area that can be described by a simple ideal gas model, and areas where it is necessary to use a more accurate model for one of the components.
- ItemTECHNIQUE FOR DETERMINATION OF PHASE CHANGES IN MOIST AIR FLOW IN A BLADE CASCADE(2018) Vestfálová Magda; Šafařík Pavel; Šimurda David
- ItemThermodynamics of moist air(nakladatelství ČVUT, 2016) Vestfálová Magda; Šafařík Pavel
- ItemTools for determination of humid air state for experimental and numerical investigation of equilibrium physical processes(2017) Vestfálová Magda; Šafařík PavelThe presented article deals with the solution of processes in humid air involving the particular elimination of moisture contained in the air. In the case that all of the moisture in the humid air is in the gaseous state, it is a homogeneous mixture. In the case that a part of the moisture in the humid air is in the state of liquid or solid, it is a heterogeneous mixture. In the presented paper processes, where the partial elimination of moisture from humid air (either as a liquid or as a solid phase) can appear, are studied. They are the processes, where the moist air mixture becomes heterogeneous. Based on the theory of ideal mixtures the computational methods enabling determination of the thermodynamic state of the beginning of the elimination of moisture are developed. The thermodynamic properties of dry air and water are applied. Subsequently there are designed diagrams that can be used as an aid to identify interfaces of homogeneous and heterogeneous humid air.