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Archiv článků od 10.9.2018 do 19.2.2019

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19.2.2019
Ing. Miroslava Kmecová, doc. Ing. Michal Krajčík, Ph.D., Mgr. Jozef Vojtaššák

The removal of heat and combustion products in the underground garage of the commercial and entertainment center was solved by the smoke clearing system. In the garage, vacuum ventilation was considered. The difference between the exhaust and the intake air was 20%.

18.2.2019
Ing. Jan Vidim

Measuring and control devices as well as other HVAC systems, run through their lifecycle, at the end of which the system needs to be reconstructed. A key condition for a successful retrofit is to determine the required life of the refurbished equipment.

11.2.2019
doc. Ing. Vladimír Zmrhal, Ph.D., ČVUT v Praze, Fakulta strojní, Ústav techniky prostředí, Časopis Vytápění, větrání, instalace

The knowledge of internal heat gains from people performing certain activities is important for energy simulation calculations. The most commonly used data are present in Czech standard for heat load calculation, based on the values specified in ASHRAE. The standard greatly simplifies heat production from children. A calculation based on the heat balance presents a production of sensible and latent heat from people, depending on age, physical proportions, type of activity and thermal conditions in space. The results are compared with the data presented in the literature including the ratio between convection and radiation heat flow. The main goal of the analysis is to determine the heat flow from the children as an input for energy simulation calculations of school buildings.

6.2.2019
RNDr. Jan Baxa , Ph.D., Head of Asset Management CA Immo Real Estate Management Czech Republic s.r.o.

In the case of building management, innovation is mainly used to improve the quality of the indoor environment and the comfort of people in the bulding. The role of the energy management of buildings is getting to a whole new position, where each measure is considered not only by looking at money and financial savings, but also by performance and above all health of people.

21.1.2019
doc. Ing. Milan Ostrý, Ph.D., FAST VUT v Brně, Ústav pozemního stavitelství

Paper deals with the definition of energy flexible building, its impact on the stability of the grid with the planned increasing share of energy from renewable sources and the possibility of using the heat storage capacity of building structures. Paper further analyzes the selected methodology for evaluation of the energy flexibible building and gives an example of thermally activated building structures.

14.1.2019
Bc. Tomáš Kops

If we want to maintain air quality in buildings, which is represented by carbon dioxide concentration, it is necessary to know the production of this gas by humans in different conditions. The baseline for mild activity is known, and as it varies with physical activity, it can be determined by spirometric measurements. The article describes how to measure breathing activity and shows interesting results of carbon dioxide production on respiratory and heart rate. These dependencies make it possible to illustrate the need to adjust the air vents for ventilation with respect to the activity that man performs in the space. The article also highlights the technical possibilities to implement the air quality control in the space served by the air-conditioning system.
I recommend this article for publishing.

18.12.2018
Bc. Barbora Stojanová

The article presents the methodology of validation of the urological operating room for the number of solid particles. The author presents a methodology for assessing the classification of the space in the patient's operating field and in its surroundings. Classification is carried out according to ČSN EN ISO 14644-1 for different times during operation. This is a very topical issue, as the development of new technologies is going forward, the acquisition of optical particle counters is becoming more and more accessible and it is a matter of time when these devices will be a standard part of the permanent measurement of the operating theater's internal space.

6.12.2018
Ing. Jakub Diviš, Ing. Jan Růžička, Ph.D.

The paper summarizes latest research on the influence of natural clay materials and earth structures on the quality of indoor microclimate regarding relative humidity. This laboratory research has been carried out at FCE CTU in Prague and UCEEB CTU in Prague and focuses on the dynamic sorption properties of building structures based on natural clays compared to building structures based on common building materials.

4.12.2018
Ing. Jan Tripes, TZÚS Praha, s. p., pobočka České Budějovice

The article describes basic principles of the SBToolCZ green building assessment methodology stressing its up-to-date methods for school buildings. An example of a certified school is given. Renovation of this school was assessed and optimised by the SBToolCZ system which lead to the conversion into intelligent, zero energy building.

29.11.2018
Ing. Josef Hodboď, TZB-info, redakce

Virtual models of spaces, devices, humans, and their interconnectedness with mathematical descriptions of the interactions between them allow for shorter time in finding the optimal variation. Many processes are neither realistically traceable at the micro level, and can be derived only on the basis of the consistency of simulations and real measurements at the macro level. The TZB area offers a wide range of computer simulations, as lectures at the conference.

26.11.2018
Ing. Petr Wolf, Ph.D., Ing. Sofiane Kichou, Ing. Marek Maška

In July 2018, a two-year monitoring of the FENIX Group a.s. in Jeseník. During this time, different battery operating modes were applied to test their capabilities to ensure the power operation of the object. This article describes the entire period in terms of energy flows in the building. The key parameters are energy consumption, supply to the grid, self-sufficiency of the building from the photovoltaic source and its local use. A number of articles have been written about the building, detailing the building and energy aspects [1, 2]. Therefore, the description of the energy economy in the building will be given only to the extent necessary for a general view of the building's energy.

21.11.2018
Ing. Miroslava Kmecová, doc. Ing. Michal Krajčík, Ph.D., doc. Ing. Ondřej Šikula, Ph.D.

Personalized ventilation is one of the options to address individual requirements for the supply of fresh air to various workplaces. In particular, desk administration for the use of personalized ventilation creates good assumptions. Applying this method of ventilation is not common, it is the subject of research and the search for optimal solutions. However, as the article shows, it has a number of advantages.

20.11.2018
Ing. Jan Vidim, Domat Control System s.r.o.

The "size" of the control system has a significant impact on how individual actors in the supply chain - investor, designer, salesman and implementation technician or programmer - are approaching it. But how do you determine the size - and how do you define it at all? In terms of measurement and regulation, we can highlight two main factors: range and complexity.

12.11.2018
Ing. Jiří Novotný, doc. Ing. Tomáš Matuška, Ph.D.

The methodology for determining energy-neutral or energy-zero houses is different at national levels. The interest in the realization of such houses is not only influenced by the methodology but also by the market conditions in the area of moving surplus energy production from one object to another. This is an economically disadvantageous purchase price when delivering to the network. If the existing conditions in the Czech Republic are not changed, the implementation of energy-zero houses for investors will not be interesting and the potential for reduction of CO2 production will not be utilized.

5.11.2018
Ing. Jiří Novotný, doc. Ing. Tomáš Matuška, Ph.D.

The methodology for determining energy-neutral or energy-zero houses is different at national levels. The interest in the realization of such houses is not only influenced by the methodology but also by the market conditions in the area of moving surplus energy production from one object to another. This is an economically disadvantageous purchase price when delivering to the network. If the existing conditions in the Czech Republic are not changed, the implementation of energy-zero houses for investors will not be interesting and the potential for reduction of CO2 production will not be utilized.

15.10.2018
Ing. Miroslav Urban, Ph.D., Ing. Michal Bejček, Ing. Marek Maška, Ing. Petr Wolf

The article contains a summary of energy consumption, a comparison with the calculation assumptions in a particular administrative building. The object is designed with minimal energy consumption and the goal is to achieve the highest degree of energy independence using photovoltaics and battery storage. The actual course of measured energy consumption, the overall assessment for the past period, the monthly summaries for the building as a whole and the individual sub-measured energy consumption are given. The aim is to bring the issue to the professional public and to indicate the path to the solution.

15.10.2018
Efficient Energy GmbH

Chiller operators are currently facing enormous challenges. In 2018, the next phase of the F-Gas Regulation is implemented across the EU. HFKW-type refrigerant prices have risen sharply and are a critical flaw, and safety requirements have been tightened on operators.

9.10.2018
doc. Ing. Aleš Rubina, Ph.D, Ing. Olga Rubinová, Ph.D.

Steam dampening and air heaters are the most common air conditioning in the winter. Steam dampening has its hygienic advantages but also technical drawbacks.

8.10.2018
Ing. Jan Antonín, Ph.D., Ing. Zdena Dobrá

The notion of a nearly zero building, usually NZEB or nZEB, is no longer a novelty. This energy standard was introduced in 2016 and is gradually expanding into family houses. There are legislation, standards, but little has been gained. That's why the authors analyzed 130 already existing family houses with different heat sources. The result is an assessment of the influence of different heat sources on the energy intensity of homes and therefore an orientation aid for decision-makers of future builders.

Výsledky měření koncentrace CO<sub>2</sub> v&nbsp;ložnici při přirozeném větrání oknem
10.9.2018
Ing. Petr Bohuslávek, redakce

The measurement of carbon dioxide concentration was made in my bedroom in February 2018 within one week. CO2 concentration during the night is evaluated under different ventilation modes. The results show a significant effect of ventilation on air quality. They prove that only natural ventilation through tight windows in current developmental residential buildings is inadequate.


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