scholarly journals Current trends of climatically driven minimal heat demand for residential buildings

2020 ◽  
Vol 606 ◽  
pp. 012005
Author(s):  
G G Alexandrov ◽  
A S Ginzburg
Keyword(s):  
Residential Buildings ◽  
Current Trends ◽  
Heat Demand

Methodology of Comparative Studies on Air-Handling Units with Heat Recuperation

2015 ◽  
Vol 237 ◽  
pp. 148-153 ◽  
Author(s):  
Stanisław Kozioł ◽  
Szymon Zacharski
Keyword(s):  
Residential Buildings ◽  
Operating Conditions ◽  
The European Union ◽  
Energy Effect ◽  
Air Handling Unit ◽  
Current Trends ◽  
Air Handling Units ◽  
Heat Recuperation ◽  
Save Energy ◽  
Near Future

The increasing prices of energy and the drive to reduce the emission of greenhouse gases into the atmosphere observed in the recent years have contributed to the intensive development of research on how to reduce the energy consumption of buildings. The confirmations of the current trends are the formal and legal regulations of the European Union that require the buildings to be passive and “zero-energy” in the near future. The introduction of new elements helping one to save energy in the structure of a building requires their formal verification and the confirmation of their safety, effectiveness, and parameters crucial from the point of their application in residential buildings and offices. The authors present an original prototype of an innovative device and a methodology of conducting studies on air-handling units with heat recuperation used in passive and energy-saving buildings. They also discuss the structure and the modus operandi of the system that reconstructs the actual operating conditions of a tested object. The system was used for tests on the tightness of several air-handling units, which also aimed at the verification of their thermal efficiency and the effectiveness of the recuperation of humidity. Air-handling unit tests came from different manufacturers, and they all had the function of heat recuperation. The authors present the results of their investigations that enabled the assessment of the safety of the objects tested, and they also facilitated the comparison of their performance parameters deciding on the energy effect. The tests also formed the foundation for the verification of the developed research system.

scholarly journals Current trends interior design of residential building

2020 ◽  
Vol 78 (4) ◽  
pp. 28-34
Keyword(s):  
Interior Design ◽  
Residential Buildings ◽  
Residential Building ◽  
Human Environment ◽  
Current Trends

The article analyzes the main tasks and principles of solving the interior design of residential buildings as an everyday human environment. The design of residential buildings using quality materials is considered.

scholarly journals State support for housing construction in the Republic of Kazakhstan: problems and prospects

2021 ◽  
pp. 149-160
Author(s):  
Yu. V. Fedyarova ◽  
A. M. Rakhmetova
Keyword(s):  
Housing Market ◽  
Housing Stock ◽  
Residential Buildings ◽  
Housing Prices ◽  
Housing Construction ◽  
Existing Problems ◽  
Current Trends ◽  
Role Of The State ◽  
Analysis And Synthesis ◽  
The Republic

The purpose of the study based on the analysis of current trends in the development of housing construction and the assessment of the role of the state in this process, to identify existing problems and propose promising ways to solve them in the Republic of Kazakhstan.Methodology. The article uses such research methods as comparison, generalization, analysis and synthesis, modeling (making a trend forecast).Originality / value of the research. The results of the assessment of the development of the housing market in the Republic of Kazakhstan over the past 18 years allowed us to identify current limitations and problems in its development, including on the basis of the forecast of the development of the housing market until 2025 in order to develop appropriate recommendations for their solution.Findings. According to the results of the study, the process of housing construction development from 2003 to 2020 in Kazakhstan was carried out mainly thanks to state financial support. The results of the trend analysis for the period from 2020 to 2025 showed that the peak of commissioning of residential buildings put into operation will be observed in 2023, and housing prices will increase. In this regard, the authors have proposed recommendations for solving such problems as reducing the level of corruption in the system of distribution of tender purchases, in the process of adoption and commissioning of the housing stock, as well as in the distribution of housing, the closedness of general plans of settlements to the population, insufficient quality of housing and others.

scholarly journals Deep thermomodernization of three residential buildings in Kryvyi Rih, Ukraine

2018 ◽  
Vol 49 ◽  
pp. 00088
Author(s):  
Kamil Różycki
Keyword(s):  
Residential Buildings ◽  
Photovoltaic System ◽  
Solar Irradiation ◽  
Present Level ◽  
Internal Temperature ◽  
Transfer Coefficients ◽  
Heat Transfer Coefficients ◽  
Heat Demand ◽  
Heating Installation ◽  
The Impact

This article presents the energy balance conditions of three multi-family residential buildings located in Kryvyi Rih, Ukraine. These buildings were built more than 40 years ago and are not insulated. A significant amount of energy is lost by the external partitions. The building’s heating is powered by municipal natural gas. A proposal for several thermomodernization variants for selected facilities are presented in the article. These variants of deep thermomodernization include an upgrade of the heating installation, insulation of external walls and roof, and the replacement of windows and doors in common areas. In view of the recent increases in the gas prices, the internal building's temperature is maintained below the thermal comfort. The presented variants include the proposal to leave the internal temperature at the present level, as well as to increase it to 20 °C. Heat transfer coefficients were calculated based on of the PN-EN 6946 standard and the heat demand for the buildings was estimated in the standard reference year in accordance with the PN-EN ISO 13790 standard. Results are compared with real values. The buildings’ models were prepared in the Audytor OZC 6.7. Pro software. The impact of appropriately sized photovoltaic system for each of the objects was also analyzed and the solar irradiation data has been taken from the RETScreen 4 software.

scholarly journals COMPARISON REFURBISHMENT MODELS OF DISTRICT HEATING NETWORKS

2013 ◽  
Vol 20 (1) ◽  
pp. 11-20 ◽  
Author(s):  
Algirdas Kuprys ◽  
Ramūnas Gatautis
Keyword(s):  
Heat Loss ◽  
Residential Buildings ◽  
Functional Dependence ◽  
Harmful Effect ◽  
District Heating ◽  
Residential Building ◽  
Distribution Networks ◽  
Computer Data ◽  
Heat Demand ◽  
The Cost

The renovation of multi-storey residential buildings reduces heat consumption intensity and decreases heat demand, which may have a harmful effect on a district heating supply system. The paper analyses the heat loss change in four district heating distribution networks (DHNs) of Kaunas at the various scenarios of buildings and DHN renovation stages. A bundle of genetic algorithm software package was used to carry out the districts’ distribution network hydraulic calculations in the case of building renovation without changing the hydrodynamic and network routes. The experimental data were used to calculate heat loss for old and new pipes. The computer data of networks used to summarise the cost of DHN then for the renovation of buildings as well as for renovation progress will go evenly with DHN refurbishment. Network optimization results were summarised by functional dependence. The comparison of the projects’ efficiency was analysed in the following cases: the diameters of pipes of DHN were not changed, new diameters of pipes were integrated partly after partial residential buildings renovation and after a complete renovation of residential building and optimisation of pipeline diameters. The efficiency of separate guidelines of the DHN refurbishment project was summarised by performing sensitivity analysis.

scholarly journals Thermal and Mechanical Studies of Perlite Concrete Casing for Chimneys in Residential Buildings

Materials ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2011
Author(s):  
Krzysztof Drozdzol
Keyword(s):  
Fire Safety ◽  
Building Materials ◽  
Residential Buildings ◽  
Concrete Block ◽  
Test Results ◽  
Safety Level ◽  
Current Trends ◽  
Concrete Blocks ◽  
High Insulation ◽  
Materials Used

Chimneys are structures designed to convey exhaust gases from heating devices to the outside of buildings. The materials from which they are made have a great impact on their fire safety, as well as on the safety of the whole building. As current trends in the construction industry are moving towards improving the environmental impact and fire safety, changes to building materials are constantly being introduced. This also applies to the development of chimney technology, as there is still a recognised need for new solutions when it comes to materials used in the production of chimney systems. This article presents the findings of tests carried out on a chimney made from innovative perlite concrete blocks. Four different perlite concrete blocks that differed in bulk densities were analysed. The obtained results were then compared with widely used leca (lightweight expanded clay aggregate) concrete blocks. The test results confirmed high insulation properties of the perlite concrete block, from which the innovative chimney casing was made. The fire safety level was maintained even in high temperatures that occur during soot fire (1000 °C). These properties were retained despite there being no additional insulation of the flue duct. Even though the thermal load decreased the compressive strength of the chimney blocks, they still displayed sufficient average strength of 4.03 MPa. Additionally, the test results confirmed the possibility of recovering heat from the chimney with the efficiency of 23–30%, which constitutes a considerable increase compared to chimneys made from leca concrete blocks.

scholarly journals Design strategies for integration of green roofs in sustainable housing

2015 ◽  
pp. 57
Author(s):  
Avi Friedman
Keyword(s):  
Urban Areas ◽  
Residential Buildings ◽  
Green Roofs ◽  
Design Strategies ◽  
Leed Certification ◽  
Sustainable Housing ◽  
Heat Demand ◽  
The Aesthetic ◽  
Aesthetic Values ◽  
Supporting Structures

<p>Green roofs are the integration of plant material and its supporting structures in buildings. Such an approach provides a habitat for local flora and fauna, helps manage storm water, reduces heat demand in winter and the cooling load in the summer, enhances the aesthetic values of dwellings, provides the occupants with comfort and amenities and strengthens environmental responsibility. Because roofs represent approximately 40 percent to 50 percent of the surfaces in urban areas, green roofs have an important role in drainage and as a result water management as well. In fact, when a green roof is installed on 50 percent or more of the roof’s surface, it guarantees 2 points and can contribute 7 additional points toward LEED certification - almost 20 percent of the required rating. This paper classifies green roofs and offers strategies for their integration in residential buildings and examines their benefits, construction principles and applications.</p>

scholarly journals Peak Power of Heat Source for Domestic Hot Water Preparation (DHW) for Residential Estate in Poland as a Representative Case Study for the Climate of Central Europe

Energies ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 8047
Author(s):  
Łukasz Amanowicz
Keyword(s):  
Heat Source ◽  
Peak Power ◽  
Residential Buildings ◽  
Renewable Energy Sources ◽  
Hot Water ◽  
Correct Selection ◽  
Domestic Hot Water ◽  
Heat Demand ◽  
Selection Of

Due to the energy transformation in buildings, the proportions of energy consumption for heating, ventilation and domestic hot water preparation (DHW) have changed. The latter component can now play a significant role, not only in the context of the annual heat demand, but also in the context of selecting the peak power of the heat source. In this paper, the comparison of chosen methods for its calculation is presented. The results show that for contemporary residential buildings, the peak power for DHW preparation can achieve the same or higher value as the peak power for heating and ventilation. For this reason, nowadays the correct selection of the peak power of a heat source for DHW purposes becomes more important, especially if it uses renewable energy sources, because it affects its size and so the investment cost and economic efficiency. It is also indicated that in modern buildings, mainly accumulative systems with hot water storage tanks should be taken into account because they are less sensitive to design errors (wrongly selected peak value in the context of the uncertainty of hot water consumption) and because they result in acceptable value of peak power for DHW in comparison to heating and ventilation.

Energy Consumption and CO2 Emission of Buildings Built with Industrialized Technology: The Case of Debrecen and Future Trends

2014 ◽  
Vol 899 ◽  
pp. 16-23
Author(s):  
Tamás Csoknyai
Keyword(s):  
Energy Consumption ◽  
Residential Buildings ◽  
District Heating ◽  
Energy Performance ◽  
Future Trend ◽  
Building Stock ◽  
Heating Systems ◽  
Heat Demand ◽  
District Heating Systems ◽  
Inefficient Operation

The residential buildings built with prefabricated technology (also called panel buildings) represent a significant part of the building stock, particularly in Eastern Europe. These buildings are typically 30-40 years old and due to their poor energy performance they have been in the focus of energy policy makers over the recent years. These buildings are typically connected to district heating systems and the continuously decreasing heat demand caused by the renovation subsidy programs resulting in risks of inefficient operation and on the long term it questions the viability of the district heating systems. Therefore it is particularly important to have a clear picture on the energy consumption trends about this segment of the building stock. In this paper, the building stock of the city of Debrecen connected to district heating is analysed. The current energy consumption figures of the buildings are analysed. In Debrecen, the share of retrofitted buildings is relatively low (appr. 15%), therefore a future trend analysis was also carried out. The results of this study can be interesting for other cities as well, particularly those with a significant share of “panel buildings”.

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