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Dynamic model of a heat pump with plate heat exchangers and ecological refrigerant
Strmiska, Pavel ; Řehák Kopečková, Barbora (referee) ; Pokorný, Jan (advisor)
For the optimization of a heat pump, there is a need to possess its dynamic model. One of the freely available tools for creating such a model is the language Modelica and its open-source compiler OpenModelica. The thesis aims to research options for creating dynamic models of refrigeration circuits with the ecological refrigerant R290 and its components in Modelica, to create the circuit and subsequently validate it using previously measured data. Models of basic components of heat pumps - compressor, condenser, evaporator and expansion valve are created in a way described in the thesis. A simplified model of a refrigerant loop is also created
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Validity of commercially available smartwatches when estimating energy expenditure
Kopecký, David ; Pokorný, Jan (referee) ; Řehák Kopečková, Barbora (advisor)
Metabolic rate is an energy quantity. Its value is a key input not only in thermophysiological models, but also in the calculation of heat stress indices or complex models predicting a person's thermal sensation. With the dynamic development of technology, sporttesters are able to estimate energy expenditure, among other things. It is a non-invasive method of estimating energy expenditure, or metabolic rate, using associated body functions to predict it. This work deals with the validity of the accuracy of metabolic rate estimation using the Garmin Fenix 6X Pro sporttester in comparison with indirect calorimetry. The accuracy of the metabolic rate estimation was tested for the activities of lying down, administrative work and cycling with regulated mechanical resistance of 100 and 150 W. 15 male subjects aged 28 ± 5 years, with a weight of 83.2 ± 13.5 kg and a height of 180 ± 7 cm participated in the study. In terms of the results, it is possible to observe a lower accuracy of prediction of metabolic rate for low-intensity activities, with the resulting MAPE being around 19-43 %. On the other hand, for activities with moderate activity, the prediction of the metabolic rate by the used sporttester proved to be sufficiently accurate, with a resulting MAPE in the range of 6–8 %.
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Increasing of Effectiveness of Personal Management in Karlova Pekárna Ltd. Company
Berková, Aneta ; Berka, Lukáš (referee) ; Pokorný, Jiří (advisor)
This diploma thesis provides a detailed analysis of human resources in the Karlova pekárna Ltd. company with the aim of decreasing the employee fluctuation. The analytical part contains information concerning the external and internal company environment and results of a sociological survey conducted among the company employees. The data obtained from the survey serve as a basis for change proposals related to the working environment, appraisal, motivation and career growth area.
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Proposal for Improvement Communication in Firm
Bednářová, Lenka ; Nečas, Bohuslav (referee) ; Pokorný, Jiří (advisor)
Abstract The thesis deals with effective interpersonal communication and communication with customers, which is one of the most important parts of marketing. The thesis is divided into three main sections – theoretical, analytical and practical. The theoretical part describes external and internal communication in corporate management. The analytical section describes the company Videoklinik Ltd. from perspective of its activities and by means of analysis identifies weaknesses in communication. In the practical part elements of communication are drawn and recommended to streamline system of communication within and outside the company thus to secure not only prosperity of the company but mainly its maintenance on the market.
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Design of universal hydraulic power unit
Holub, Vojtěch ; Pokorný, Jan (referee) ; Knoflíček, Radek (advisor)
The first part of this masters thesis deals with research of modulat type hydraulics power units from other significant world producers. Design part of thesis contains complete design of three product ranges of hydraulics power units. It also includes simulation by FEM method. Last part descibe safety of machine and brief economic evaluation of product.
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Establishment of the Housing Association Due to the Privatization of the Residential House
Majtanová, Marie ; Pokorný, Josef (referee) ; Musilová, Helena (advisor)
Privatization of apartment houses continues again in Brno. Owners sell apartment houses only to legal entities, which are founded by present-day tenants. The content of the thesis includes the establishment of the housing association and meeting all the conditions set by municipal council of Brno. The thesis describes activities before constitutive meeting, constitutive meeting itself, and operations after entry in the trade register and all the documents which have to be submitted to the municipal council of Brno.
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Database of typical clothing for cabin of cars
Toma, Róbert ; Pokorný, Jan (referee) ; Fišer, Jan (advisor)
In this bachelor thesis, there are processed databases of typical clothing for cabin of cars. Data are based on information from survey for both women and men for three seasons – summer, transitional season and winter. There are mentioned factors which affect thermal comfort and thermoregulation of human body. The thesis includes options how to measure thermal comfort and how we can evaluate results on different scales. Next, I process the way how we measure thermal resistance of each databases of clothing. Measurements are placed in climate chamber in VUT Brno and we are using manikin Newton made by Measurement technology Northwest. In the end, we mention some results and comparison of both genders.
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Design of compaction plate
Svatoš, Ivo ; Pokorný, Jan (referee) ; Škopán, Miroslav (advisor)
Design of compaction plate as additional equipment for excavator or loader. The first part of thesis describes individual part of compaction plate and treat of the most frequently used solutions. The second part is an overview of product of selected manufactrers. The third part considered of cencrete design of compaction plate in accordance with submission. The output is drawing of scheme and most functional calculation.
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