Technical Transactions iss. 8. Civil Engineering iss. 3-B

Technical Transactions iss. 8. Civil Engineering iss. 3-B

Type: Collection of magazine numbers
Release date

Collection items (58)


Reactive power compensation and energy saving

Zębala, Kinga
Article
2014
The issue of energy saving in workplaces where multiple machines are in use, and consequently there is high energy consumption, is discussed in this paper.

Selected problems of thermal bridges in contemporary multi-occupancy buildings

Wesołowska, Maria, Szczepaniak, Paula
Article
2014
In contemporary multi-occupancy buildings, each architecture studio has its own uniform and trademarked design for the external appearance of the structure. Façade features such as breaks, bays, balconies and cornices often generate energy and humidity problems. These require detailed analysis, both in terms of construction as well as physical aspects, so that elements are appropriately designed.

Impact of windows parameters on the thermal performance of a multi-family building

Trząski, Adrian, Panek, Aleksander, Rucińska, Joanna
Article
2014
The paper presents an analysis of the influence of various window types on the thermal performance of a multi-family building. In the analysis several different fenestration system configurations were considered. For these systems, heating and cooling demand of the building was estimated according to the simple hourly method proposed in ISO 13790. The results were used to compare, both the overall thermal performance of the building, as well as the actual thermal energy balance of analyzed windows.

Automation retrofitting as a first stage of complex renovation of district heating substations in public buildings

Szymański, Michał, Górzeński, Radosław, Szkarłat, Kamil
Article
2014
Automation systems modernization in selected district heating substations in university campus buildings were described in the article. Replacement of the control valves and application of heat meters for each circuits were the scope of the renovation. Local automation systems were integrated within Building Management System. Conclusions resulted from the operation of renovated heat substations will be used in the future for further complex and optimized heating substations modernization. Analysis of the work of the heating substations in buildings built in the past few years were also presented in the paper.

Analysis of temperature and humidity processes in existing half-timbered partitions

Szymanowska-Gwiżdż, Agnieszka, Steidl, Tomasz
Article
2014
The paper presents the analysis of the inner surface of half-timbered walls in multi-family residential houses created in the early twentieth century. The analysis was made in order to avoid the possibility of mold. The analysis of partition’s moisture growth was performed at the existing state and after designed thermal insulation from the inner side. The measurements and analyzes are a prelude to further research and analysis of such types of objects.

CFD modelling of air flow and transport of contaminants in a passive house

Szczepanik, Nina, Schnotale, Jacek
Article
2014
Rising costs of energy have caused the building envelope in the living sector to become tighter to improve energy efficiency. This raises questions about the quality of the indoor air as in traditional housing fresh air is supplied not only by ventilation system by also by infiltration through cracks in the building envelope. If a building is not properly ventilated, contaminants could accumulate within it and their levels could become hazardous to human comfort and health.

A study of thick thermal insulation with density foam polystyrene (EPS)

Sobolewski, Mariusz
Article
2014
Energy-efficient construction requires the use of thermal insulation materials of high thickness compared to traditional construction. Thus, there is a need to conduct research for thick insulation products. The paper presents the results of the measurements of thermal parameters for foam polystyrenes (EPS) with low density and of different thicknesses. The experimental work has been carried out in the Water Center Laboratory WULS-SGGW.

Energy efficient buildings ‒ lower structure

Sedláková, Anna, Majdlen, Pavol, Ťažký, Ladislav
Article
2014
Part of the package of low-energy and passive houses is the basement and foundation too. A correct proposal of construction detail of buildings that lying on the soil is one of the steps that contribute to reducing energy requirements for heating and operation of building. At the same time increase the quality of the indoor environment as well as performance at work. In the construction of the lower structure, the most delicate point is the contact of walls, foundations and floor structure with the soil and subsoil, this frequently leads to inconsistent solutions of the design detail, resulting in the formation of thermal bridges with subsequent condensation.

Experimental and theoretical study of microclimate in historical church in Wiśniowa

Sadłowska-Sałęga, Agnieszka, Radoń, Jan
Article
2014
The paper presents a comparison of calculation and measurement results of interior air temperature and humidity in the historical wooden church in Wiśniowa. WUFI®plus software was used for these calculations. A concurrence between calculated and measured parameters allows the presupposition that calculation accuracy is sufficient for the purposes of determining thermal comfort in buildings where the indoor climate is shaped passively. Statistical analysis of the trend changes seems to also be sufficient to assess dynamic impact.

Thermal performance of slab on grade with floor heating in a passive house

Radoń, Jan, Wąs, Krzysztof, Flaga-Maryańczyk, Agnieszka, Antretter, Florian
Article
2014
Extensive experimental investigations have been carried out in the passive house in Boruszowice for several years. The building foundation interface consists of a 25 cm reinforced concrete slab situated on a 40 cm layer of Styrofoam. The analysis of experimental results as well as theoretical calculations made it possible to determine the thermal performance of the applied slab on grade with floor heating during the whole yea.