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Air - conditioning of office building
Birhanzl, Petr ; Košner, Jan (referee) ; Janotková, Eva (advisor)
The thesis describes the various ventilation and air conditioning systems used to maintain suitable, temperature-humidity parameters of air in office buildings. The thesis deals with their advantages and disadvantages and assessing the suitability of using several systems for the application. The main task is to choose the most suitable system and it's calculation. For the actual system design is needed to detect a heat loss and gains the specified object and calculate the minimum amount of ventilation air. There will also be given psychrometric calculation of a device and drawing documentation, including draft of an engine room.
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Air conditioning of kitchen and butttery hatch
Dvořák, Vlastimil ; Košner, Jan (referee) ; Janotková, Eva (advisor)
This thesis describes the design and dimensioning of a device for air conditioning in kitchen and dispensing room in the administrative building according to the given parameters. The thesis begins with a calculation part that contains the determination of ventilation air, the calculation of heat losses and heat load of the object. In addition, here are psychrometrics calculations of air-conditioning device for summer and winter operation. The following is part of the design, which includes design of terminal components, design and sizing ductwork and the design and location of air-conditioning unit. The thesis includes a technical report, list of used materials and drawing documentation.
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Measurement of the velocity distribution in a low-velocity outlet jet
Uhlář, Václav ; Pavelek, Milan (referee) ; Janotková, Eva (advisor)
Diploma thesis deal with measuring air-jet generated by low-velocity outlet. Diploma thesis piles of several part. First part includes velocity measurment (flow volumes) single ventilators. Follows measuring velocity distribution in air-jet generated by low-velocity outlet, his vizualization by the smoke method. Last point is problems errors and uncertainties measuring. Thesis likewise includes appendices, where there are mentioned tables from single maesuring and setting frequency transducers.
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Air-conditioning of pharmacy
Martincová, Lenka ; Košner, Jan (referee) ; Janotková, Eva (advisor)
Diploma thesis is focused on air-conditioning and hot air ventilation of the pharmacy. The pharmacy is a part of a supermarket building. The pharmacy has its own engine room and air-conditioning. Solution is focused with the calculation of the flow rate, thermal losses and profit of pharmacy. Power of heater, cooler and humidifier are calculated according to psychrometric evaluation. Distribution elements and distribution of a duct are designed according to the flow rate of air. Total pressure losses in the duct are calculated according to the distribution in the conclusion. Units are designed for hot air ventilation and air conditioning and the engine room. In appendix there are calculations of thermal losses and gain, output from programme of CLIMACAL, drawing documentation and material specifications.
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Air-conditioning and ventilation of social hall
Potočník, Petr ; Pavelek, Milan (referee) ; Janotková, Eva (advisor)
The aim of this diploma thesis is to design and suggest dimensions of air conditioners for ballroom and ventilation of cafeteria, cloakrooms and sanitary rooms. Sub-goals are next heat-load calculation of air-conditioned space, psychrometric calculations for summer and winter environment conditions, design of air distribution, machinery room of air conditioning, to design and suggest dimensions of air distribution system, specification of materials and design of necessary technical drawings.
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Measuring of emissivity of wet and dry surfaces
Brzobohatý, Tomáš ; Janotková, Eva (referee) ; Pavelek, Milan (advisor)
The objective of this thesis is to create summary of emissivity of wet surfaces, emissivity of rime surfaces and emissivity of dry surfaces. The next objective is to create materials for termovision measurement and find the use for this materials for practice. Theoretical part of thesis deals with a theory of ways of heat transfer (radiation mainly), description of emisivity concept, description of emisivity finding ways and the show emissivity of mesuared materials from avaible sources for working hypothesis. Emissivity of dry, wet and rime samples were measured as the experimental part of thesis. Experimental part of thesis consist of experiment description, working hypothesis, measuring instruments and measuring area description, measuring proces description and presentation of measured results. Obtained dependences are benefits for termovision measurent, energy evaluation and the thermal state microclimate simulations.
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Optimization of Cabin Environment in Small Transport Aircraft
Fišer, Jan ; Janotková, Eva (referee) ; Masaryk, Michal (referee) ; Patočka, Stanislav (referee) ; Jícha, Miroslav (advisor)
The thesis deals with design and optimization of environment in cabins of small transport aircrafts, especially in terms of thermal comfort and quality of ventilation. The design of air distribution systems and structural design were optimized and most important parts of cabin design with highest impact on the quality of thermal comfort and ventilation were identified based on literature research and experience of the author. The chosen modifications and their influence on the microclimate inside the cabin were investigated using the CFD model, which was validated by results obtained from measurements of flow and temperature fields in the cabin mock-up of small transport aircraft EV-55. Next optimizations were investigated: The type of air distribution system, The geometry of ducts of air distribution system, Thickness of thermal insulation and Emissivity of internal surfaces. Thermal comfort was assessed based on the methodology of the equivalent temperature and comfort zones diagram developed by H. O. Nilsson and for assessing the quality of ventilation the concept of based on index of the age of the air was used. Fifty cases were simulated in total and base of its results Modified mixing ventilation with original air ducts geometry have been evaluated as an optimum. The ducts geometry of Modified mixing ventilation system was suggested by author specially for the thesis. In combination with high thermal insulation of walls and high emissivity of the interior, then this system of ventilation ensures maximum thermal comfort and quality of ventilation for the investigated range of environmental and operational conditions.
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The capture efficiency research of REEXS with the work bench
Pavlas, David ; Pavelek, Milan (referee) ; Janotková, Eva (advisor)
Proposed diploma work provides capture efficiency measurements of generated pollution captured by reinforced slot exhaust system in modification with work bench using tracer gas method. There are shown results of capture efficiency for traditional exhausting (no radial air added) and reinforced exhausting (using radial air supply effect) in this work. This study also conatins the comparison and discusion of obtained measurement results with measurement errors and uncertainties.
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Experimental Research on Aerosol Transport and Deposition in a Human Respiratory Tract
Lízal, František ; Janotková, Eva (referee) ; Adamec, Vladimír (referee) ; Jícha, Miroslav (advisor)
Human health is significantly influenced by inhaled aerosols. Insight to the aerosol transport and deposition mechanisms is a prerequisite for both, toxicological protection against harmful particles and efficient application of inhaled therapeutic aerosols. The purpose of this doctoral thesis was to gain new knowledge of this topic on the basis of in vitro measurements. Phase-Doppler Anemometry was chosen for aerosol transport measurement, for it allows simultaneous measurement of particle size and velocity. Results were processed by means of statistical methods and frequency analysis. Deposition of spherical aerosol particles was measured by Positron Emission Tomography, while deposition of fibrous aerosol was measured by Phase-Contrast Microscopy combined with automated image analysis. All experiments were performed on physical models created on the basis of the real lung geometry. New knowledge of flow characteristics, transition from laminar to turbulent flow, effect of breathing pattern or particle size on aerosol transport and deposition in human lungs are outcomes of this work. Significant effect of the oral cavity was ascertained due to comparison of aerosol deposition in realistic and semi-realistic model with cylindrical smooth walls. Acquired data not merely extended our knowledge of aerosol behavior in lungs but it can also be used for validation of numerical simulations.
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Air-cinditioning of hotel kitchen
Mazáč, Ondřej ; Pavelek, Milan (referee) ; Janotková, Eva (advisor)
The objective of my thesis was to suggest and size the equipment for a hotel kitchen air-conditioning according to the given parameters. This thesis deals with the calculation of the amount of circulating air, heat loss and profit and the psychometric calculation for summer and winter operation. It also contains the design of air channels, terminal components, air-conditioning unit and ventilation of machine room. Furthermore, it comprises of the suggestion of measurement system and regulation, estimation of energy demand, technical report and list of material items. The calculation is equipped with drawing documentation.
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