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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Tepelná ztráta objektu dle různých metodik

Lexa, Pavel January 2008 (has links)
No description available.
2

Vliv vybraných meteorologických prvků na užitkovost a chování holštýnských dojnic

Loukotová, Jana January 2010 (has links)
No description available.
3

Hodnocení teplotního stresu u dojnic holštýnského plemene

Egersdorfová, Alena January 2009 (has links)
No description available.
4

Termografické měření obvodového pláště vybraného objektu pro provoz nebo výrobu

Felcman, Martin January 2019 (has links)
The thesis deals with the detection of thermal bridges of the building envelope of SCHOTT s.r.o. and MANNTECO s.r.o. The aim of this diploma thesis is the experimental verification of thermal defects and anomalies of peripheral structures of buildings. The qualitative infrared thermography method is used to ensure the results. The results of the experimental measurement revealed thermal defects and anomalies on the peripheral shells of the measured objects. The acquired thermograms are evaluated. With regard to the measurement results, construction operations are proposed, which are suitable for the elimination of thermal defects and anomalies of the building envelope.
5

Vertikální zemní výměníky jako zdroj energie / Vertical ground exchangers as a source of energy

Mašek, Lukáš January 2015 (has links)
The dissertation on the topic of "vertical ground heat exchangers as a source of energy" deals with boreholes as a source of energy for the heat pump. In the chapter "The current state" is gradually described problems geothermal energy, open and closed systems, the distribution of thermal boreholes by construction and at the end of the chapter focuses on the thermal test wells. In the chapter "Methodology", in the theoretical part are zoomed simplistic relationships that describe the heat conduction around the borehole, analytical models, numerical models and a combination of numerical and analytical models that are able to describe two or three-dimensional conditions. In the experimental part of this chapter is given space characteristics of the place of measurement and definition of terms attenuation depth and heat transfer coefficient. The final chapter of the dissertation "Results and discussion" presents concrete results.
6

Vliv tepelného stresu na kvalitu ejakulátu kanců

Přibilová, Magdalena January 2016 (has links)
The aim of the study was to investigate the effect of high temperature on selected parameters of semen quality of duroc boars at the insemination station in Velké Mezirici (N 49°23.46667', E 15°52.70135') in season from May to September. For purpose of the experiment were chosen 20 boars of the Duroc breed, divided into two groups. Group A (the control group; n = 10) has average quality of semen and group B (the experimantal group; n = 10) showed below-average long-term quality of semen. Analysed parametres were volume of ejaculate (ml), concentration of sperm (thousands/ml), total account of sperm in ejaculate (mld. ks), motility (%) and rate of abnormal sperm (%). In the stable the temperature (°C) and relative humidity (%) were monitored at hourly intervals for whole period of this study. The results of the experiment shows that the volume of ejaculate from both monitored groups increased at the same rate (P > 0.05) and in group A from 198 ml to 252 ml; in group B from 203 ml to 241 ml. Concentration of sperm of group A decreased (from 499 000/ml to 436 000/ml), whereas concentration of sperm of group B was at the same level during the experiment. The motility of sperm of group A at the end of the experiment increased (from 71.4 % to 74.0 %) and motility of sperm of group B has intensively decreased (from 67.3 % to 62.2 %). The decreation of sperm motility was statisticaly significant (P < 0.05). The influence of ambient temperature in this case had no significant effect on boar semen with average values (group A), but has been reported statistical significance in deterioration of sperm motility (P <0.05) and number of morphologically abnormal sperm (P < 0.05) in group of boars, who showed below-average long-term semen quality (group B). In both groups there was lower sperm concentration, which could be due to the increased volume of ejaculate in the summer months.
7

Model vázaného pohybu vlhkostního a teplotního pole ve dřevě během sušení

Trcala, Miroslav January 2009 (has links)
No description available.
8

Srovnání sušících režimů pomocí numerických simulací

Ryšávka, Filip January 2017 (has links)
This bachelor thesis deals with the comparison of drying modes mutually developed between them and their subsequent comparison with the standard. In the work, there is also theoretical analysis of humidity and temperature flow and numerical simulation process of drying wood created in a computer program COMSOL Multiphysics, which based on the finite element method. Assembled mathematical model of motion of bound moisture and temperature field in the wood is based on a set of two partial differential equations, and also on the respective boundary conditions III. regulations. Own model of the drying based on generally orthotropic material properties of wood in non-stationary diffusion of moisture and heat. It is therefore a transport model, which uses the gradient of humidity and temperature as the driving force and the material coefficients such as variables depending on the humidity, temperature, density and other essential parameters of the dried material. The main contribution of this work is the ability to improve optimization of selected drying modes with the possibility of application to the next.
9

Vliv vlhkosti materiálu na tepelné vlastnosti rukavic / The influence of moisture on the thermal properties of the gloves

Janíčková, Žaneta January 2019 (has links)
This diploma thesis is focused on the assessment of the influence of moisture on the thermal properties of the gloves. The first part of the thesis deals with the research of topics related to the given issue as well as with the derivation of the computational relations needed for evaluation of experimental measurements. The main focus of the work lies on defining the hypotheses and experiments that are used to verify the influence of moisture on the thermal resistance of gloves. As for the experimental part, it describes the individual methods of moistening the gloves from which the moistening through the air humidity and the moistening by the immersion were analysed. To verify the suitability of selected moistening methods, the tested glove samples were measured on the thermal manikin both in a dry and a moistened state under the conditions defined by ČSN EN 511 and ČSN EN ISO 15831 standards. Individual states were repeatedly measured and afterwards the progresses of thermal resistance depending on time were graphically displayed. The thesis also includes analysis of measurement uncertainties as well as evaluation of measurement repeatability. From the obtained results, both the defined hypotheses and theoretical assumptions about the decrease of the thermal resistance of a textile material due to the influence of moisture were confirmed in the conclusion of the diploma thesis.
10

Testování tepelných vlastností rukavic pomocí tepelného manekýna / Determination of thermal properties of gloves by means of thermal manikin

Pidrová, Kateřina January 2016 (has links)
This diploma thesis is focused on determination of thermal properties of gloves by means of thermal manikin. The background research with relation to this topic together with derivation of the computational equations used for the following measurement are presented in the first part. The most significant part of this work is suggestion of procedure for measuring the heat resistance of gloves with thermal manikin based on procedure from ČSN EN 511. This methodics was verificated with 5 pairs of gloves together with analysing the uncertainties and testing the repeatability of this measurement. This work also contains the outline for all of the measured pairs with posibilities of their usage in specific situations and surrounding air temperatures. At the end of this work is mentioned brief summary of achieved results.

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