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Archiv článků od 12.8.2019 do 11.5.2021

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11.5.2021
Ing. Jiří Beranovský, MSC., Ph.D., MBA, EkoWATT CZ s. r. o., ČVUT v Praze, FEL, katedra EMHV, Petra Horová, MSC., Gabriela Krajcarová, MSc., EkoWATT CZ s. r. o.

The low heat loss in family houses enables comfortable hot air heating with air-to-air heat pumps. The authors give an example of the conditions for obtaining a subsidy from the „Nová Zelená úsporám“ (Green to Savings) program. Achieving the highest category of the NZÚ subsidy is also realistic in the „new buildings“ category.

10.5.2021
Ing. Daniel Kliment, VUT FAST v Brně, Ústav pozemního stavitelství

The paper focuses on the study of the relationship between housing prices and selected environmental characteristics, the impact of the perception of urban scenes near residential real estate on the price of housing and presents the results of known and already performed studies. Introduced characteristics of urban scene perception are often combined with other traditional characteristics, for example in the hedonic pricing model for calculating marginal prices, another alternative method is to use expert judgment, for example for hedonic analysis. The performed studies develop and form quantification tools, which subsequently help people in decision-making processes to understand and analyze the interactions between residents and individual components of urban scenes and urbanism.

30.4.2021
Ing. Zuzana Mrňová, VUT FAST Brno, Ústav stavební ekonomiky a řízení

A responsible approach to the environment is not only related to corporate ecology, but is also increasingly reflected in the design and construction of buildings, which is closely related to the concept of sustainable construction of buildings. With the development of sustainable construction, the need arose to evaluate buildings and their impact on the environment. For this reason, environmental certifications of buildings have been developed, which assess how a building affects its surroundings during its life cycle.
The aim of this article is to find out which environmental certifications exist in the world and which of them are most often used in the Czech Republic. Finally, the certifications are compared and their main differences are described.

22.3.2021
Ing. Libor Šteffek, Ph.D., Ing. Jiří Kalánek, Ph.D., VUT FAST Brno, Ústav pozemního stavitelství, prof. Ing. Milan Ostrý, Ph.D., FAST VUT v Brně, Ústav pozemního stavitelství

The paper deals with the energy balance of windows for different combination of glazing parameters in connection with their orientation. Sum of solar gains through the transparent surfaces of a building envelope depends mainly on the size, their orientation and the g-value. Large glazed surfaces with correct orientation ensure large solar gains, but they are also the weakest part of the thermal isulating building envelope.
The influences of various U-value (Ug) and g-value of glazing on the energy performance of selected passive house were calculated by the use of computer simulation.

9.2.2021
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.

21.12.2020
Ing. Radim Smolka, Ph.D., Ing. Tomáš Petříček, Ph.D., Ing. et Petr Kacálek, Ing. Ph.D., FAST VUT v Brně

Panels for openings in structures have always been an essential and integral part of buildings. Their importance in terms of a building´s functionality was not recognised. However, the general view on this issue has changed from focusing on big planar segments and critical details to sub-elements of these structures. This does not only focus on the forms of connecting joints but also on the supporting systems that keep the panels in the right position and ensure they function properly. One of the most strained segments is the threshold structure, especially the entrance door threshold structure. It is the part where substantial defects in construction occur in terms of waterproofing, as well as in the static, thermal and technical functions thereof. In conventional buildings, this problem is solved by pulling the floor structure under the entrance door structure and subsequently covering it with waterproofing material. This system cannot work effectively over the long term so local defects occur. A proposal is put forward to solve this problem by installing a sub-threshold door coupler made of composite materials. The coupler is designed so that its variability complies with the required parameters for most door structures on the European market.

23.11.2020
Ing. Miroslav Procházka, Technický a zkušební ústav stavební Praha s.p., pobočka Brno

This paper deals with the test results of shear characteristics of thermal insulation boards based on MW with longitudinal orientation of fibres of thickness 200 mm and more according to ČSN EN 13162+A1, documents serious faults in test procedure according to current ČSN EN 12090, reasons included, and proposes possible way of their solution.

5.10.2020
Ing. Miroslav Urban, Ph.D., ČVUT v Praze, Fakulta stavební, katedra TZB

In connection with the entry into force of Decree No. 264/2020 Coll., On the energy performance of buildings, the method of assessing the energy performance of new buildings is changing. The article on the case study of a family house presents an approach to the concept of technical systems of new family houses from the point of view of current and future requirements (from 1. 1. 2022) for the energy performance of buildings.

22.7.2020
Ing. arch. Štěpán Mančík, Ph.D., ČVUT Praha, pracoviště UCEEB, Ing. Antonín Lupíšek, Ph.D., ČVUT v Praze, pracoviště UCEEB

The main aim of the project TiCo is to facilitate advantages of prefabrication in building residential houses by connecting two major systems with their strong points – reinforced concrete skeleton for load bearing structure and wooden panel system for facades and partition walls.

16.6.2020
Ing. Radek Červín, Fakulta strojní, ČVUT v Praze, doc. Ing. Tomáš Matuška, Ph.D., Univerzitní centrum energeticky efektivních budov, ČVUT v Praze

The subject of the research is a ventilation unit with a heat pump providing vacuum ventilation in a specific family house. The year-round energy balance of the operation was prepared from the obtained parameters. For a total heat loss of 5 kW, the seasonal heating factor SPF of the entire system was evaluated at the level of 2.5.

25.5.2020
prof. Ing. arch. Ing. Zuzana Pešková, Ph.D., ČVUT Praha, Fakulta stavební, katedra architektury

The Architecture and Urban Planning Committee of Protected Landscape Areas in Central Bohemia Region has to deal with low-suitable new family houses architecture design very often. The recommendations for buildings were written to preserve typical architecture form. Due to the passive standards coming be ordinary used in family house design, Administration of the Krivoklatsko PLA initiated the cooperation with Faculty of Civil Engineering CTU in Prague to try find new design for Krivoklatsko PLA. Architecture and Building Engineering students worked out design of new family houses as their Bachelor projects. The goal of this paper is to present student projects as an inspiration for builders and evaluate the usage of new shapes and materials in the design suitability context.

16.3.2020
Ing. David Pálenský, ČVUT Praha, Fakulta stavební, Ing. Antonín Lupíšek, Ph.D., ČVUT v Praze, pracoviště UCEEB

This is a case study of a multifamily residential building that has been environmentally assessed in terms of greenhouse gas (GHG) production using a simplified life cycle assessment (LCA) method. The results of total GHG emissions were compared to the emission limit value, which was set based on the climate objectives of the Paris Agreement and the scientific report The Emissions Gap Report. In response to the non-compliance with the emission limit, a number of emission-saving measures have been proposed and have been suitably designed into variants meeting the emission requirement.

9.3.2020
Ing. David Pálenský, ČVUT Praha, Fakulta stavební, Ing. Antonín Lupíšek, Ph.D., ČVUT v Praze, pracoviště UCEEB

This is a case study of a multifamily residential building that has been environmentally assessed in terms of greenhouse gas (GHG) production using a simplified life cycle assessment (LCA) method. The results of total GHG emissions were compared to the emission limit value, which was set based on the climate objectives of the Paris Agreement and the scientific report The Emissions Gap Report. In response to the non-compliance with the emission limit, a number of emission-saving measures have been proposed and have been suitably designed into variants meeting the emission requirement.

3.2.2020
Ing. Radoslav Ponechal, PhD., Stavebná fakulta Žilinskej univerzity v Žiline, katedra Pozemného staviteľstva a urbanizmu

The issue of calculating summer overheating is less known in the field of civil engineers, although it is becoming more and more current. In the first part, the paper deals with current standard requirements in this area. The following is an example of computational programs. It further addresses the problem of climatic boundary conditions and other significant factors affecting the result of the calculation of summer overheating such as ventilation and internal heat gains. The second part of the paper will be devoted to the impact of the method of internal heat gains application on simulation results. The paper concludes with a model daily schedule of internal heat gains for the dwelling unit, created from the taken over actual statistical measurements.

22.10.2019
prof. Ing. Ivan Chmúrny, PhD., Stavebná fakulta STU v Bratislave

Increasing the thermal insulation properties of walls, roofs, floors and windows has a positive effect on reducing heat loss and energy need for heating. However, when assessing the energy need for cooling in buildings with conditioned indoor environment, this tendency to increase the thermal insulation capability may lead to an increase the energy need for cooling, when measures to reduce heat gains by transparent structures are not applied.

14.10.2019
Prof. Ing. Pavol Ďurica, CSc., Ing. Peter Barňák, Žilinská univerzita v Žiline Stavebná fakulta Katedra pozemného staviteľstva a urbanizmu (KPSU SvF ŽUŽ)

In the contribution, we are focused on the quality of the heat-moisture microclimate and the aspects that affect it. We chose one office room in the building of the Research Center of the University of Žilina (UNIZA), oriented to the west. The subject of the measurements were all physical components of the indoor environment, the effect of solar radiation through window constructions and floor temperatures using low-temperature radiant floor heating. The contribution describes measuring methods, results of measurements and related partial conclusions for cold climatic conditions of the year.

30.9.2019
Ing. Ondřej Horák, prof. Ing. Karel Kabele, CSc., ČVUT v Praze, Fakulta stavební, katedra TZB

The paper deals with the comparison of real energy consumption with values calculated in the Energy Performance Certificate (PENB) for two buildings: New low-energy family house and older apartment building. In both cases, these are wooden buildings. Subsequently, basic differences between the card and the reality in terms of energy consumption are defined in the form of house use coefficients.

2.9.2019
doc. Ing. Petr Horák, Ph.D., VUT v Brně, Fakulta stavební, Ústav technických zařízení budov, Ing. Jakub Horák, CEVRE Consultants s.r.o.

The authors answer the question how to choose a heat source for a family house built with respect to the current thermal technical requirements. An example is new building of a two-storey family house approximately 20 km south of Brno with a residential part of the house with a square plan of 11 × 11 meters. The evaluation results are compared according to five different criteria.

12.8.2019
Ing. Kateřina Kubrichtová, prof. Ing. Karel Kabele, CSc., ČVUT v Praze, Fakulta stavební, katedra TZB

The article deals with BIM technology in co-operation with design of HVAC. The theme is divided into two related parts. The first part describes the complex issues related to BIM technology and its implementation in TZB practice. In the second part there is a practical way of comparing the calculation of heat losses according to CSN EN and using the BIM tool.


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