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Ultrafine particles filtration efficiency of commonly available materials
Kudláčová, Martina ; Köbölová, Klaudia (referee) ; Sitek, Tomáš (advisor)
In connection with the outbreak of the COVID19 pandemic, there has been a global shortage of personal respiratory protective equipment against ultrafine particles. The citizens were forced to reach for the alternatives and use homemade cloth masks for personal protection. The efficiency of the protection provided by a cloth mask is related to the selection of a suitable material for its production. This thesis contains basic knowledge in the field of aerosol theory, transmission of the SARS-CoV-2 virus, which causes the COVID19 disease and filtration of aerosol particles containing the virus. Based on the theoretical knowledge from the first part, an experimental measurement is performer determining the efficiency of filtration and pressure loss of selected commonly available materials. Based on the results comparison, the most suitable materials for the homemade masks production are selected.
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Design of Welding Helmet with Respirator
Paš, Antonín ; Sládek, Josef (referee) ; Sovják, Richard (advisor)
The bachelor thesis analyzes current offer of welding helmets on the market and searches for aspects that are to be improved. Based on conclusions made during critical research, a new concept of welding helmet with integrated powered air purifying respirator was designed. Crucial aspects of the design are innovative appearance, improvement of ergonomic qualities and fulfilling safety demands. Final concept suggests, which technologies might become future standard of protective equipment for welders.
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Respirator filtration efficiency
Tolnaj, Tomáš ; Mišík, Ondrej (referee) ; Bělka, Miloslav (advisor)
Aerosols are everywhere around us and pose an increasing risk to human health. That is why aerosols and their filtration are the subject of several researches. This bachelor thesis focuses on established standards for respirator testing according to the European standard and factors influencing their filtration efficiency. The research also includes a description of the theoretical background of aerosols, the physical principles of deposition, a detailed description of respirators. The thesis contains an experimental part, which consists of designing, assembling and setting up the experimental rig with subsequent measurement of the filtration efficiency, pressure loss and evaluation of the measured results.
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Differences in inhalation between men and famales during the identic scuba diving output
Rosenkranzová, Michaela ; Bažant, Filip (advisor) ; Vondrášek, David (referee)
Name: : The difference of consumption of a medium being inhaled between a man and a woman at the same level of endurance in scuba diving. Goals: The primary goal of this work, is to determine if and how is the amount of the inhaled medium depending on the gender of the divers. Compare the consumption between men and women while being faced with the same amount of stress, meaning during a united profile of a dive, try to maximize the decrease of the influence of stress factors. Confirm or deny the hypothesis that men show higher values of the inhaled medium. Methods: The theoretical part of this paper, was created based on the research of the appropriate literature. To obtain all the data, there was used the method of experiments, the results were then analyzed, compared and than statistically evaluated using the Students T- test. Probandi (n=10+10) took part in a 30 minute long and 20 meters deep dive in Bořená hora, during which their consumption of the inhaled medium was recorded every 5 seconds using a special underwater computer with a probe. Results: It was found out that men, during the same dive, consume more air than women because of their higher body weight. Key words: scuba diving, air, sex, respirator, minute ventilation
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Ultrafine particles filtration efficiency of commonly available materials
Kudláčová, Martina ; Köbölová, Klaudia (referee) ; Sitek, Tomáš (advisor)
In connection with the outbreak of the COVID19 pandemic, there has been a global shortage of personal respiratory protective equipment against ultrafine particles. The citizens were forced to reach for the alternatives and use homemade cloth masks for personal protection. The efficiency of the protection provided by a cloth mask is related to the selection of a suitable material for its production. This thesis contains basic knowledge in the field of aerosol theory, transmission of the SARS-CoV-2 virus, which causes the COVID19 disease and filtration of aerosol particles containing the virus. Based on the theoretical knowledge from the first part, an experimental measurement is performer determining the efficiency of filtration and pressure loss of selected commonly available materials. Based on the results comparison, the most suitable materials for the homemade masks production are selected.
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Design of Welding Helmet with Respirator
Paš, Antonín ; Sládek, Josef (referee) ; Sovják, Richard (advisor)
The bachelor thesis analyzes current offer of welding helmets on the market and searches for aspects that are to be improved. Based on conclusions made during critical research, a new concept of welding helmet with integrated powered air purifying respirator was designed. Crucial aspects of the design are innovative appearance, improvement of ergonomic qualities and fulfilling safety demands. Final concept suggests, which technologies might become future standard of protective equipment for welders.
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Differences in inhalation between men and famales during the identic scuba diving output
Rosenkranzová, Michaela ; Bažant, Filip (advisor) ; Vondrášek, David (referee)
Name: : The difference of consumption of a medium being inhaled between a man and a woman at the same level of endurance in scuba diving. Goals: The primary goal of this work, is to determine if and how is the amount of the inhaled medium depending on the gender of the divers. Compare the consumption between men and women while being faced with the same amount of stress, meaning during a united profile of a dive, try to maximize the decrease of the influence of stress factors. Confirm or deny the hypothesis that men show higher values of the inhaled medium. Methods: The theoretical part of this paper, was created based on the research of the appropriate literature. To obtain all the data, there was used the method of experiments, the results were then analyzed, compared and than statistically evaluated using the Students T- test. Probandi (n=10+10) took part in a 30 minute long and 20 meters deep dive in Bořená hora, during which their consumption of the inhaled medium was recorded every 5 seconds using a special underwater computer with a probe. Results: It was found out that men, during the same dive, consume more air than women because of their higher body weight. Key words: scuba diving, air, sex, respirator, minute ventilation
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The analysis of the effectiveness of respirators in relation to the nature of the work activity using the Dust TRAK 8530 monitor.
PÍŠEK, Petr
This thesis deals with the analysis of the effectiveness of respirators in relation to the nature of the work activity using the Dust TRAK 8530 monitor. First are presented what dust actually is and the splitting up of individual types of dust particles. Further this work concerns legislative decrees and applicable laws relating to the protection of air quality and health in work environments. The paper also describes protection comprised of respirators and their distribution. Part of this work are the individual measurements from agricultural operations and construction from the demolition of buildings. Based on the measured values, the conclusions are drawn, according to the applicable legal provisions of the Czech Republic.
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