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Archiv článků od 18.10.2021 do 13.10.2023

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Foto © Fotolia.com
13.10.2023
doc. RNDr. Dana Procházková, Ph.D., DrSc., ČVUT v Praze, Fakulta strojní

The presented set of four communications deals with the risk management in favour of safety applied to the operation of pipelines. It respects current professional knowledge and presents it in the concept promoted by the UN, the European Union, the OECD and others. The second part summarizes the knowledge and principles of risk management and lists the sources of risks for the pipeline.

Foto © Andrei Merkulov, Fotolia.com
11.10.2023
doc. RNDr. Dana Procházková, Ph.D., DrSc., ČVUT v Praze, Fakulta strojní

The presented set of four communications deals with the risk management in favour of safety applied to the operation of pipelines. It respects current professional knowledge and presents it in the concept promoted by the UN, the European Union, the OECD and others. The first part introduces terms used in engineering practice, which deals with risks and safety and introduces knowledge that is relevant to pipeline safety.

Zdroj: Atrea s.r.o.
7.8.2023
Ing. David Petrýdes, Ph.D., MBA, Air-lab s.r.o.

The paper focuses on the experimental verification of the use of CO2 as a tracer gas for the detection of leakages in air handling systems, instead of the widely used tracer gas of sulphur hexafluoride (SF6), which is subject to legislative restrictions. Verification of the applicability of CO2 is accompanied by the definition of measurement uncertainties.

28.11.2022
doc. Dr. Ing. Zdeněk Pospíchal, Ing. Zdeněk Pospíchal, jr.

The increasing incidence of “legionnaire's disease” caused by strains of Legionella pneumophila bacteria indicates an underestimation of the risk not only on the side of hot water production, but above all in its distribution through internal water supply. And what the public does not expect at all, even when distributing cold drinking water.

foto © Siemens
13.9.2022
Ing. Petr Dolejš, Ph.D., Ing. Filip Hložanka

Design engineering using standard objects brings new possibilities to water management design practice. Similar to CAD tools in the past, integrated engineering now represents the gateway to the world of digitization of water management units and can be understood as an effective pre-step before the introduction of BIM, enabling the creation of digital twins and operational optimization. These new procedures can open the gates of perception of the project and management of the whole in hitherto unknown levels. Due to emerging legislative and business trends in the Czech Republic, we can expect an increased demand for digitally processed projects in object architecture, enabling an interconnected approach to the creation and management of documentation in individual phases of the life cycle of a technological unit.

1.8.2022
Ing. Jakub Niedoba, doc. Ing. Tomáš Vymazal, Ph.D.

This paper discusses the feasibility of long-term monitoring using modern sensors and systems. New technologies are making long-term monitoring more accurate simpler and more successful. Currently there are many buildings that are monitored for a long time with its subsequent condition assessment, and thanks to the installed sensors and systems it has been possible to detect hidden and emerging defects and damages. Based on the current condition of the structure, it has been possible to carry out timely repairs or maintenance of the building which ultimately saves economic and time costs for the building, ensures safety and increases the life and durability of the building.

Bytové domy na Jižním městě v Praze (Foto J. Hodboď)
20.6.2022
Ing. Veronika Dokoupilová, doc. Ing. Petr Horák, Ph.D.

Stricter ENB criteria and efforts to enforce a comprehensive view, not only the energy needs associated with housing, but also the place of residence, mode of transport, etc. show that the current situation is not systematically resolved. Meeting the new criteria in existing buildings, many of which have not even undergone basic insulation, will be very challenging, albeit necessary.

28.4.2022
Ing. Aleš Průcha, VUT FAST Brno

This article deals with valuation using BIM. The aim of this article is to appraise the construction using the BIM model in cost approach. The article deals with the description of BIM implementation and the need for BIM in construction. It contains a description of valuation methods, including the valuation of selected structures by individual methods. The individual methods are compared with the cost approach using RTS BIM.

28.3.2022
Ing. Miroslav Urban, Ph.D., Ing. Jan Vitouš, Jan Kuldan

The first part described the real course of heating and electricity consumption by radiant panels of two family houses with different uses. In this part, the houses are compared in terms of the parameters of their indoor environment and in relation to the measured energy consumption and their energy intensity.

21.3.2022
Ing. Miroslav Urban, Ph.D., Ing. Jan Vitouš, Jan Kuldan

The first part of the article describes the real course of heating and electricity consumption by radiant panels of two family houses with different approaches to their use. In the second part, the houses will be compared in terms of the parameters of their indoor environment in relation to the measured energy consumption and their energy intensity.

17.2.2022
Ing. Jana Budajová, Ing. Silvia Vilčekvá, PhD., doc. Ing. Peter Mésároš, PhD.

The construction industry is the primary source of environmental impacts, especially the carbon footprint. Life cycle assessment (LCA) as an analytical method is used for quantifying the environmental impact of the investigated residential building. Life cycle costs (LCC) from the point of view of the circular economy create an economic model prioritizing reuse and recycling. The aim of this paper is to assess the residential building in terms of carbon footprint, using LCA analysis and circular economy, using LCC analysis. The residential building emits 1 756 tons of CO2e , which represents 41.35 kg CO2e/m2/year. The total estimated life cycle cost of the building in nominal terms is 1 694 699.61 €. This is the average total life cycle cost of 1 995.21 €/m2.

28.1.2022
doc. Ing. Petr Horák, Ph.D., VUT v Brně, Fakulta stavební, Ústav technických zařízení budov

The article deals with the principles of calculating the monthly method of supplied energy for heating. Describes in a clear form the individual mechanisms of calculation according to the relevant standards. It is designed for the needs of energy specialists and the professional public.

26.1.2022
doc. Ing. Petr Horák, Ph.D., VUT v Brně, Fakulta stavební, Ústav technických zařízení budov

The assessment of the energy performance of buildings depends on a large number of calculations, which must comply with the applicable legislation. The article presents the related structure of legal regulations, including standards and their brief characteristics.

Analýza mobilního laserového skenování ve stavebnictví
29.11.2021
Ing. Jakub Nosek, Ing. Petr Kalvoda, Ph.D., Ing. Michal Kuruc, Ph.D.

Mobile laser scanning (MLS) is currently commonly used in many surveying applications. The refinement of MLS point clouds is usually done by increasing the number of control points (CP) equally distributed within the mapped area. The accuracy of point clouds can also be improved by multiple passes of the mobile mapping system (MMS). This paper deals with the proposal of a suitable procedure by which it would be possible to remove local deformations of MLS point clouds. The proposed approach is based on the comparison of point clouds from multiple MMS passes. Additional CPs are then added to the places where the more significant differences between the point clouds.

10.11.2021
Ing. Zdeněk Poloprutský, ČVUT v Praze, Fakulta stavební, katedra geomatiky

This paper deals with the possibilities of using modern measurement methods and technologies, i.e. ground-based laser scanning (TLS) and Image Based Modeling and Rendering (IBMR), Geographic Information Systems (GIS) and Building Information Modeling (BIM) for processing, distribution and archiving of data collected during the Building Archaeology Survey (BAS). The paper tries to briefly summarize the current state of the author's knowledge and his practical experience with the issue.

25.10.2021
Ing. Barbora Junasová, doc. Ing. Michal Krajčík, Ph.D., Ing. Martin Šimko, PhD.

High quality of the indoor environment expressed by indicators such as air temperature, relative humidity, concentration of carbon dioxide, or lighting has great impact on human health, comfort and performance. Therefore, the contribution focuses on the effect of an increase in indoor temperature on energy consumption.

18.10.2021
prof. Ing. Dušan Petráš, PhD., Stavebná fakulta STU Bratislava Katedra technického zariadenia budov

The author describes a systematic procedure leading to the processing of the audit and provides an overview of the necessary documents. The elaboration of the audit and the implementation of the proposed measures is a basic prerequisite for savings. Without subsequent evaluation of results and adjustments of operating modes, etc. however, the expected savings effect may not occur.


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