Effect of cloudiness on the production of electricity by photovoltaic panels

The paper deals with the influence of different types of cloud on the production of electricity by photovoltaic panels. In the introductory part of the paper, processes in the atmosphere are described, giving rise to various types of clouds and, consequently, to the formation of cloud. In the next section of the paper, the system is described on which the research and the methodology of acquisition and data evaluation were carried out. The last part of the paper summarizes the overall results of the research.Ministry of Education, Youth and Sports of the Czech Republic within the National Sustainability Programme [L01303, MSMT-7778/2014]; European Regional Development Fund [CZ.1.05/2.1.00/03.0089]; internal grant agency of Tomas Bata University in Zlin [IGA/CEBIA-Tech/2016/001

Phase change material based accumulation panels in combination with renewable energy sources and thermoelectric cooling

The article deals with the use of modern materials and technologies that can improve the thermal comfort in buildings. The article describes the design and usage of a special accumulation device, which is composed of thermal panels based on phase change materials (PCMs). The thermal panels have an integrated tube heat exchanger and heating foils. The technology can be used as a passive or active system for heating and cooling. It is designed as a "green technology", so it is able to use renewable energy sources, e.g., photovoltaic (PV) panels, solar thermal collectors and heat pumps. Moreover, an interesting possibility is the ability to use thermoelectric coolers. In the research, measurements of the different operating modes were made, and the results are presented in the text. The measurement approves that the technology improves the thermal capacity of the building, and it is possible to use it for active heating and cooling. © 2017 by the authors; licensee MDPI.CZ.1.05/2.1.00/03.0089, ERDF, European Regional Development Fund; MŠMT, Ministerstvo Školství, Mládeže a Tělovýchovy; IGA/CEBIA-Tech/2016/001, UTB, Univerzita Tomáše Bati ve ZlíněMinistry of Education, Youth and Sports of the Czech Republic [LO1303 (MSMT-7778/2014)]; European Regional Development Fund under the project CEBIA-Tech [CZ.1.05/2.1.00/03.0089]; Tomas Bata University in Zlin [IGA/CEBIA-Tech/2016/001

Thermoelectric cooling in combination with photovoltaics and thermal energy storage

The article deals with the use of modern technologies that can improve the thermal comfort in buildings. The article describes the usage of thermal energy storage device based on the phase change material (PCM). The technology improves the thermal capacity of the building and it is possible to use it for active heating and cooling. It is designed as a "green technology" so it is able to use renewable energy sources, e.g., photovoltaic panels, solar thermal collectors, and heat pump. Moreover, an interesting possibility is the ability to use thermal energy storage in combination with a photovoltaic system and thermoelectric coolers. In the research, there were made measurements of the different operating modes and the results are presented in the text. © The Authors, published by EDP Sciences, 2017

The use of the photovoltaic system in combination with a thermal energy storage for heating and thermoelectric cooling

The article is focused on the research of the usage of modern accumulation technology. The proposed system is able to improve the thermal comfort of building interiors. That text depicts the technology, which uses a photovoltaics and other renewable energy sources for active heating and cooling. The bases of the presented technology are the phase change material and thermal energy storages. So, it passively improves the thermal capacity of the constructions of the buildings. Moreover, there is a possibility to use it for active heating and cooling. The technology contains thermoelectric assemblies, so, there is a very interesting possibility to store thermal energy with use of renewable energy sources (such as photovoltaic system) and thermoelectric coolers side by side. In the manuscript, there are shown measurements and results of the active operating modes of proposed technology. It was found the technology is able to work in active heating and cooling modes. It works quite well in active heating mode. On the other hand, thermoelectric cooling mode had a problem with overheating. In the end, the problem was solved and the cooling mode works. The measurements and results are described in the text. © 2018 by the authors.Ministry of Education, Youth and Sports of the Czech Republic within the National Sustainability Programme [LO1303 (MSMT-7778/2014)]; European Regional Development Fund under the project CEBIA-Tech [CZ.1.05/2.1.00/03.0089]; Internal Grant Agency of Tomas Bata University [IGA/CebiaTech/2018/001

Economic assessment and optimizing of the solar water heating system

The article deals with the economic evaluation of investment and optimization of the solar water heating system for family houses. From the point of view of solar systems, the optimal solution is based on the specific application of it. The design is dependent on the location of solar thermal collectors and ration between active aperture area and real daytime consumption. Common calculations according to actual standards often give overstated results, which also reflected in the value of the investments. The article presents the research of optimal parameters of the thermal solar system for preparing of domestic hot water. A combination of related standards and software TRNSYS are used to find optimal parameters. Thanks to created and verified simulation models, it is possible to design parameters so as to avoid under-dimensioning or over-dimensioning of the solar system. Energy price is another factor affects the payback period of investments. This is affected by the used energy sources and their combination. For example, buildings that use electricity to heat water or heating have different energy charges than a building that uses natural gas. So, the aim is to find technically and economically efficient solution. © 2018 The Authors, published by EDP Sciences.Ministry of Education, Youth and Sports of the Czech RepublicMinistry of Education, Youth & Sports - Czech Republic [LO1303 (MSMT-7778/2014)]; European Regional Development Fund under the project CEBIA-Tech [CZ.1.05/2.1.00/03.0089]; Internal Grant Agency of Tomas Bata University [IGA/CebiaTech/2018/001

Design and experimental evaluation of phase change material based cooling ceiling system

This article deals with the possibility of using PCMs in cooling ceiling systems to reduce significantly air temperature fluctuations and energy demands for cooling. The PCM-based cooling ceiling's technical design was performed, and a prototype was realized in this research. The experimental verification of the proposed system was performed to determine the actual parameters in different operational modes and their comparison with the same cooling ceiling system without PCM. The transient simulations in the TRNSYS simulation software were also carried out and validated with experiments. Based on the findings, the complex simulations were performed for application under the specific climatic conditions of Czechia. This work contains a comprehensive approach from the prototype design, through the experiments and partial simulations, to complex simulations based on the specific parameters and an economic evaluation. The results of this work show the ability of the proposed cooling ceiling solution to reduce temperature peaks by up to 3.2 °C, while energy savings can be up to 27%, depending on the air change rate. These results can also help significantly determine the economic feasibility of a PCM-based solution for ceiling cooling systems. © 2021Ministerstvo Školství, Mládeže a Tělovýchovy, MŠMT: LO1303, MSMT-7778/2014, NFP304010Y280; European Regional Development Fund, ERDF: CZ.1.05/2.1.00/19.0376European Regional Development Fund under the project CEBIA-Tech Instrumentation [CZ.1.05/2.1.00/19.0376]; Ministry of Education, Youth and Sports of the Czech Republic within the National Sustainability Programme [LO1303 (MSMT-7778/2014)]; project INTERREG V-A [SK-CZ/2019/11, NFP304010Y280

Pedagogical links and connections in approach of M. Feldenkrais and I. Vyskocil

The bachelor thesis reveals selected links and connections of pedagogical aspects in approach of Moshe Feldenkrais and Ivan Vyskocil. It also describes their meetings and beginning professional collaboration in the late sixties of the 20th Century that hasn't been recorded yet. The author brings this situation into wider context of their personal and professional biographies that formed their unique approaches in the field of psychosomatic disciplines and somatic education

My Expensive Body: Perceiving the Attractiveness of the Body by People with a Monthly Salary Over CZK 100 000 who exercise fitness

Liberal Arts and Humanities - Social Sciences ModuleStudium humanitní vzdělanosti - Společenskovědní modulFaculty of HumanitiesFakulta humanitních studi

Phase Change Material Based Accumulation Panels in Combination with Renewable Energy Sources and Thermoelectric Cooling

The article deals with the use of modern materials and technologies that can improve the thermal comfort in buildings. The article describes the design and usage of a special accumulation device, which is composed of thermal panels based on phase change materials (PCMs). The thermal panels have an integrated tube heat exchanger and heating foils. The technology can be used as a passive or active system for heating and cooling. It is designed as a “green technology”, so it is able to use renewable energy sources, e.g., photovoltaic (PV) panels, solar thermal collectors and heat pumps. Moreover, an interesting possibility is the ability to use thermoelectric coolers. In the research, measurements of the different operating modes were made, and the results are presented in the text. The measurement approves that the technology improves the thermal capacity of the building, and it is possible to use it for active heating and cooling