Archiv článků od 5.3.2016 do 9.10.2017

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Luka Living

Luka Living – the experience of an apartment building optimization

9.10.2017 | Ing. Michal Čejka, PORSENNA o.p.s.
The article deals with the process of energy optimization of a unique rental housing complex to a high energy standard. It analyzes the identified problems of the initial energy baseline of the building, which should be declared to meet the requirements for a high energy standard. It analyzes and substantiates each step of the process from an energy specialist‘s and an investor’s point of view.

Case study of heating savings due to glazing with increased solar factor

11.9.2017 | prof. Ing. Ivan Chmúrny, Ph.D., Stavebná fakulta STU Bratislava, Katedra konštrukcií pozemných stavieb
Case study of the energy need for heating of a family house depending on the thermal and optical properties of windows with triple glazing and the quantification of heat demand for heating.

What costs does a zero energy house have?

14.8.2017 | doc. Ing. Tomáš Matuška, Ph.D., Univerzitní centrum energeticky efektivních budov, ČVUT v Praze, Ing. Vilém Ťopek, Fakulta strojní, ČVUT v Praze
The article deals with the analysis of a possible solution of a non-energy residential building. The analysis shows what energy sources help to achieve a zero balance of non-renewable primary energy and what is not. In the contribution, the investment solution and the real operating costs of the energy-zero residential building compared to the current solution are shown for the selected solution and a simple payback period is set.
Administrativní budova Tamedia v Curychu

Technical Normalisation and Multi-Storey Timber Buildings

19.6.2017 | doc. Ing. Petr Kuklík, CSc., Ing. Lukáš Velebil, ČVUT v Praze, UCEEB, Ing. arch. Bc. Anna Gregorová, ČVUT v Praze
At present, there is growing interest in the realization of multi-storey wooden buildings. In the case of multi-storey wooden buildings, their safety, stiffness and acoustics are of key importance. The submitted paper focuses on the issue of fire safety of multi-storey wooden buildings, which is currently the subject of major discussions.
Industrial building, průmyslová budova

Energy performance of industrial buildings – PART 3 – NEARLY ENERGY ZERO BUILDING

24.4.2017 | Ing. Jiří Cihlář, CEVRE Consultants s.r.o.
Mandatory standard of building design – nearly energy zero starts for larger industrial buildings from 1st January 2018. This will have a major impact, especially in the design of the building envelope. This article analyzes whether the current setting of requirements of this building standard is technically and economically achievable. Analysis is based on typical industrial building.
průmyslová budova s téměř nulovou spotřebou energie

Energy performance of industrial buildings – PART 2 – DESIGN OF BUILDING ENVELOPE

17.4.2017 | Ing. Jiří Cihlář, CEVRE Consultants s.r.o.
Design of building envelope, that means layers of so called boundary constructions; is the key procedure within the design process. It might seem that this step is crucial only for industrial buildings with low-energy ambitions or those that are intended for international environmental certification. This article is focusing on valid Czech legal requirements and also on the coming nearly energy zero standard of buildings.

Energy performance of industrial buildings – PART 1 – LEGISLATION

10.4.2017 | Ing. Jiří Cihlář, CEVRE Consultants s.r.o.
Energy efficiency of industrial buildings in not very common topic. However, the quality of design must be based on valid national legislation and technical standards. Task to achieve best energy ratings is more and more frequently laid on building designer and energy specialist directly from investor – developer.

Environmental assessment of a detached family house Part 2

3.4.2017 | Bc. Richard Paksi, Ing. Karel Struhala, Vysoké učení technické v Brně, Fakulta stavební
This two-part paper deals with the topic of environmental effectiveness of buildings. The goal of the paper is evaluation of expected embodied environmental impacts related with a detached family house. First part of the paper describes the evaluated building and used methods. Seven currently common variants of load-bearing structures (walls and floors) are described and compared. Five variants include masonry, while the sixth and seventh variant includes cast-in-place reinforced concrete structures. The evaluation follows Life-Cycle Assessment (LCA) methodology according to ČSN EN 15978 standard. The results of the evaluation are shown in the second part of the paper. Under the specified boundary conditions the variant with ceramic masonry filled with mineral wool has 5–14 % lower environmental impacts than other evaluated variants.

Environmental assessment of a detached family house

27.3.2017 | Bc. Richard Paksi, Ing. Karel Struhala, Vysoké učení technické v Brně, Fakulta stavební
This two-part paper deals with the topic of environmental effectiveness of buildings. The goal of the paper is evaluation of expected embodied environmental impacts related with a detached family house. First part of the paper describes the evaluated building and used methods. Seven currently common variants of load-bearing structures (walls and floors) are described and compared. Five variants include masonry, while the sixth and seventh variant includes cast-in-place reinforced concrete structures. The evaluation follows Life-Cycle Assessment (LCA) methodology according to ČSN EN 15978 standard. The results of the evaluation are shown in the second part of the paper. Under the specified boundary conditions the variant with ceramic masonry filled with mineral wool has 5–14 % lower environmental impacts than other evaluated variants.

Optimised design process of low energy buildings

30.1.2017 | Ing. Juraj Hazucha
Nearly Zero Energy Buildings (NZEB) and the rest of energy efficient buildings needs to be precisely and complexly optimised during the planning stage. This helps to improve not only the energy demand and the energy costs but also overall efficiency of planning process, function, longer lifespan together with lower maintenance costs. It is crucial to start with optimisation at the very beginning of planning stage – first concepts or even when defining the client demands. These are also moments when at the lowest price we can make biggest impact on future efficiency of a building during the whole lifecycle. There are some tips like qualified client input, integral planning, architectural competition or quality assessment which can significantly improve overall quality of projects.

Nearly Zero-Energy Buildings - Case Studies

23.1.2017 | Ing. Jan Antonín, Ph.D., EnergySim, Ing. Magdalena Purkrtová
For more than a year, a nearly zero-energy standard has applied to certain buildings. In the Czech environment, specific technical parameters for such buildings have been known for three years. And for over six years, the Directive on energy performance of buildings has been in force, imposing the obligation upon EU member states to introduce this standard.

Nevertheless, it seems that for many experts, including those in the field of energy, this term is still quite unclear. Many imagine buildings coated with photovoltaic modules from the ground to the roof, buildings which are better than passive ones or buildings which are self-sufficient, i.e. completely independent of public energy networks. Given the fact that the concept of a nearly zero energy building is very distant from such notions, and because this standard will soon become obligatory for all buildings, including small family houses, let's have a look at what a nearly zero-energy building really is.

Nearly Zero-Energy Buildings

9.1.2017 | Ing. Jan Antonín, Ph.D., EnergySim, Ing. Magdalena Purkrtová
For more than a year, a nearly zero-energy standard has applied to certain buildings. In the Czech environment, specific technical parameters for such buildings have been known for three years. And for over six years, the Directive on energy performance of buildings has been in force, imposing the obligation upon EU member states to introduce this standard.

Nevertheless, it seems that for many experts, including those in the field of energy, this term is still quite unclear. Many imagine buildings coated with photovoltaic modules from the ground to the roof, buildings which are better than passive ones or buildings which are self-sufficient, i.e. completely independent of public energy networks. Given the fact that the concept of a nearly zero energy building is very distant from such notions, and because this standard will soon become obligatory for all buildings, including small family houses, let's have a look at what a nearly zero-energy building really is.
6 comments, last 12.01.2017 14:25

Access to Buildings with Nearly Zero Energy Consumption

2.1.2017 | prof. Ing. Karel Kabele, CSc., Ing. Miroslav Urban, Ph.D., ČVUT v Praze, Fakulta stavební, katedra TZB
The article describes the impact of the contemporary and future legislative requirements for new buildings in terms of their conception and utilization of renewable resources. Soon, the requirement of quality standard is going to be effective in the Czech Republic that is called building with nearly zero energy consumption. That quality standard is defined at national level by legal regulations based on the requirement of European standard. On examples of family house, residential house and administration building, the impact of the to-be-established requirements for building conception is being demonstrated from the construction as well as the technical systems' point of view. With the existing development trend maintained it can be expected that a building with nearly zero energy consumption will have, comparing to an existing building, a better quality building shell, technical systems working with high efficiency and potentially may but needn't be, partially supplied by renewable energy resources.
1 comment, 17.09.2017 11:11

Filtration in HVAC units for forced ventilation of houses I.

13.6.2016 | Ing. Pavel Vybíral, Ph.D., Fakulta strojní ČVUT, Ústav techniky prostředí
Air filtration is basic operation for indoor air environment protection against solid and liquid pollutants. Beside human and natural activity pollutants there are bacterias, viruses and mildews.

Research on energy-efficient buildings in the European Union - part 2.

30.5.2016 | doc. RNDr. Jitka Kubátová, CSc., RNDr. Petr Pracna, CSc, Technologické centrum AV ČR
Energy-efficient buildings research is one chapter of General Programme for Research and Innovation Horizont 2020 (2014 - 2020) which helps reaching the aims of european energy policy. First part of the article deals with characteristics of private-public partnership called Energy-efficient buildings (PPP EeB) that was founded for this purpose during previous General programme (2007 - 2013) and sums up projects PPP EeB supported in both programmes so far. Second part of the article deals with Czech participation in this programmes and describes topics of nearest Programme Hotizont calls for the year 2017.

Research on energy-efficient buildings in the European Union - part 1.

23.5.2016 | doc. RNDr. Jitka Kubátová, CSc., RNDr. Petr Pracna, CSc., Technologické centrum AV ČR
Energy-efficient buildings research is one chapter of General Programme for Research and Innovation Horizont 2020 (2014 - 2020) which helps reaching the aims of european energy policy. First part of the article deals with characteristics of private-public partnership called Energy-efficient buildings (PPP EeB) that was founded for this purpose during previous General programme (2007 - 2013) and sums up projects PPP EeB supported in both programmes so far. Second part of the article deals with Czech participation in this programmes and describes topics of nearest Programme Hotizont calls for the year 2017.

Effective solution of optimised construction details in praxis

18.4.2016 | Ing. Juraj Hazucha
Article shows the examples of effective solution of construction details for passive and zero energy buildings, for which today's standards define recommendations of hygienic and energy requirements. On selected details the possibilities of minimising the thermal bridge influence are shown with taking into account of economical and practical feasability. Most of the construction details were precisely optimised for the most effective solution choice. For energy efficient buildings optimisation process is essential to get the best results.
1 comment, 31.05.2016 07:11

Eurocode 5 – Design examples

21.3.2016 | Ing. Bohumil Koželouh, CSc., soudní znalec
Examples 9 to 15. Preface and helping data for calculation see Part 1 to 3.

Eurocode 5 – Design examples

14.3.2016 | Ing. Bohumil Koželouh, CSc., soudní znalec
Calculation according to Eurocode 5 examples 1 to 8. Preface and helping data for calculation see Part 1 to 3.

Low-voltage electrical installations II.

5.3.2016 | Ing. Karel Dvořáček
At present, it is establishing the second edition of the standard ČSN 33 2000-7-753: Low-voltage electrical installations – Part 7-753: Requirements for special installations or locations – Heating cables and embedded heating systems, which already includes other requirements associated with this type of heating, generalized for any use.
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