scholarly journals Innovative energy efficient thermal insulation to ensure indoor comfort in nZEB buildings

2022 ◽  
Vol 960 (1) ◽  
pp. 012005
Author(s):  
Emilia-Cerna Mladin ◽  
Madalina Calbureanu ◽  
Raluca Malciu ◽  
Diana Calbureanu
Keyword(s):  
Heat Transfer ◽  
Energy Efficient ◽  
Energy Savings ◽  
Extreme Temperature ◽  
Residential Building ◽  
Climatic Regions ◽  
Sustainable Technologies ◽  
Wall Structures ◽  
Indoor Comfort ◽  
Indoor Conditions

Abstract The paper presents the analysis of water and heat transfer through walls being thermally insulated with vegetal materials. The analysis identifies the risk for condense accumulation in the outer layers of external walls of a common residential building located in the coldest climatic regions of Romania. Different wall structures and insulation thicknesses are systematically considered with statistical extreme temperature and humidity outdoor values. Results are useful in designing nZEB individual houses with green and sustainable technologies that also provide energy savings and indoor conditions for good comfort and health in these desired building concept.

scholarly journals Optimising Window Design on Residential Building Facades by Considering Heat Transfer and Natural Lighting in Nontropical Regions of Australia

Buildings ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 206
Author(s):  
Zixuan Chen ◽  
Ahmed W. A. Hammad ◽  
Imriyas Kamardeen ◽  
Assed Haddad
Keyword(s):  
Heat Transfer ◽  
Energy Savings ◽  
Significant Proportion ◽  
Residential Building ◽  
Pareto Optimum ◽  
Natural Lighting ◽  
Proposed Model ◽  
Simulation Based ◽  
Building Information ◽  
Window Design

Windows account for a significant proportion of the total energy lost in buildings. The interaction of window type, Window-to-Wall Ratio (WWR) scheduled and window placement height influence natural lighting and heat transfer through windows. This is a pressing issue for nontropical regions considering their high emissions and distinct climatic characteristics. A limitation exists in the adoption of common simulation-based optimisation approaches in the literature, which are hardly accessible to practitioners. This article develops a numerical-based window design optimisation model using a common Building Information Modelling (BIM) platform adopted throughout the industry, focusing on nontropical regions of Australia. Three objective functions are proposed; the first objective is to maximise the available daylight, and the other two emphasize undesirable heat transfer through windows in summer and winter. The developed model is tested on a case study located in Sydney, Australia, and a set of Pareto-optimum solutions is obtained. Through the use of the proposed model, energy savings of up to 8.57% are achieved.

Improving sustainability of residential homes: occupants motivation and behaviour

2014 ◽  
Vol 8 (4) ◽  
pp. 477-491 ◽  
Author(s):  
Patrick X.W. Zou ◽  
Rebecca J. Yang
Keyword(s):  
Energy Efficient ◽  
Online Survey ◽  
Energy Savings ◽  
Residential Buildings ◽  
Residential Building ◽  
Content Type ◽  
South Wales ◽  
Improvement Measures ◽  
Research Findings ◽  
High Level

Purpose – This paper aims to investigate residential occupants’ motivations and behaviour on energy savings. Energy consumption in residential buildings is a major contributor to greenhouse gas emissions. Design/methodology/approach – By using an online survey questionnaire instrument, this research collected 504 sets of responses from households in the state of New South Wales, Australia. Findings – Through statistical analysis of the data collected, this research found that construction cost and government incentive were considered as the major influencing factors on achieving energy-efficient residential building development, and the lower bills resulted from the reduced energy and water consumption were considered as the most important benefits. The research also found that many households exhibited a high level of awareness and had implemented some sustainability improvement measures. It is suggested, based on these research findings, that governments should articulate, by means of education, the rationale and benefits of sustainable home development that are identified in this research and reduce material costs and increase government incentives. Originality/value – A framework on improving residential sustainability was proposed in this paper. Stakeholders in the sustainable home supply chain could use this framework as a reference to pave the way for energy efficient home development from their perspective

scholarly journals Optimizing Window Design on Residential Building Facades by Considering Heat Transfer and Natural Lighting in Non-tropical Regions of Australia

2020 ◽  
Author(s):  
Zixuan Chen ◽  
Ahmed W A Hammad ◽  
Imriyas Kamardeen ◽  
Assed Haddad
Keyword(s):  
Heat Transfer ◽  
Energy Savings ◽  
Significant Proportion ◽  
Residential Building ◽  
Pareto Optimum ◽  
Tropical Regions ◽  
Natural Lighting ◽  
Proposed Model ◽  
Building Information ◽  
Window Design

Windows account for a significant proportion of the total energy lost in buildings. The interaction of window type, Window-to-Wall Ratio (WWR) scheduled and window placement height would influence the natural lighting and heat transfer through windows. This is a pressing issue for non-tropical regions considering their high emissions and distinct climatic characteristics. A limitation exists in the adoption of common simulation-based optimisation approaches in the literature, which are hardly accessible to practitioners. This article develops a numerical-based window design optimisation model using a common Building Information Modelling (BIM) platform adopted throughout the industry, focusing on non-tropical regions of Australia. Three objective functions are proposed; the first objective is to maximize the available daylight, and the other two emphasize on the undesirable heat transfer through windows in summer and winter respectively. The developed model is tested on a case study located in Sydney, Australia, and a set of Pareto-optimum solutions is obtained. Through the use of the proposed model, energy savings of up to 16.43% are achieved. Key findings on the case example indicate that leveraging winter heat gain to reduce annual energy consumption should not be the top priority when designing windows for Sydney.

scholarly journals Attic extension and thermal renovation of the residential building: Case study

Spatium ◽  
2006 ◽  
pp. 41-46 ◽  
Author(s):  
Milica Jovanovic-Popovic ◽  
Ana Radivojevic ◽  
Dusan Ignjatovic ◽  
Martin Elezovic
Keyword(s):  
Thermal Insulation ◽  
Industrial Production ◽  
Energy Efficient ◽  
Energy Production ◽  
Energy Savings ◽  
Residential Building ◽  
The State ◽  
Construction Period

Buildings are the only resource growing constantly. Although relevant data for Serbia is not available, it is presumed that even more than 50% of energy production is spent on buildings in our country. This conclusion is based on two facts: the present industrial production and the state of buildings. In order to establish measures for energy efficient refurbishment, one residential building was analyzed in Belgrade. The chosen building represents the construction period when application of thermal insulation was not obligatory according to building regulation. As more than 35% of buildings were built in that period, they represent great potential for energy savings through the process of refurbishment.

scholarly journals CHANGES IN LIGHTING STANDARDS AND THEIR INFLUENCE ON THE ARCHITECTURE AND ENERGY EFFICIENCY OF MODERN RESIDENTIAL BUILDINGS

2020 ◽  
pp. 9-17
Author(s):  
E.V. Vitvitskaya ◽  
◽  
D.V. Tarasevich ◽  
Keyword(s):  
Heat Transfer ◽  
Energy Efficiency ◽  
Energy Savings ◽  
Residential Buildings ◽  
Residential Building ◽  
High Heat ◽  
Transfer Resistance ◽  
Heating And Cooling ◽  
Shielding Properties ◽  
Heat Shielding

Abstract. State regulations on the design of lighting in residential buildings in recent years have undergone significant changes, which in turn will significantly affect the architecture and energy efficiency of modern buildings of this type. This can be observed from the authors' analysis of the change in only one regulatory document given in this article – SCS (State Construction Standards) V.2.5-28: «Natural and artificial lighting» and only one lighting indicator: permissible deviation of the calculated value of CNL (coefficient of natural lighting) from the standardized value when choosing translucent structures of buildings. This article presents an analysis of this normative document in two versions – in the old one from 2012 and new from 2018. Based on the results of the analysis, the authors of this article found that, at the request of the architect, the area of translucent structures on the facades of two identical modern residential buildings can differ significantly: from the minimum with piece (separate) windows on the facades – where glazing occupies from 14.3% to 18.3% of the area of the facades; up to maximum with continuous glazing of facades – where glazing occupies up to 100% of the area of the facades of a residential building. These two facade glazing options are not only architecturally perceived differently, but they must also have different energy efficiency in order to provide different minimum allowable values of heat transfer resistance: for piece (individual) windows on the facade, this is R∑ ≥ Rq min = 0.6 m2•K/W and ordinary silicate glasses are suitable for their glazing, and for continuous glazing of the facade this should already be R∑ ≥ Rq min = 2.8 m2•K/W, that is, they must have the same heat-shielding properties as the outer walls, and their minimum allowable value of the heat transfer resistance must be 4.66 times more than for piece (separate) windows. For this option, ordinary silicate glass is no longer suitable, but modern glass-transparent structures with high heat-shielding properties should be used, for example Qbiss_Air, Pilkington, Heat Mirror Glass and others. They provide excellent protection against hypothermia in winter and overheating in summer, and have good sun protection properties. Their use in modern buildings contributes to energy savings for heating and cooling rooms throughout the year and creates increased comfort, but such translucent structures are much more expensive and better suited for elite housing construction than for social.

Economic Potentials of Energy-Efficient Residential Building Envelope Retrofitting in Turkey

2019 ◽  
pp. 728-755
Author(s):  
M. Mustafa Erdoğdu ◽  
Coşkun Karaca ◽  
Ali Kurultay
Keyword(s):  
Energy Consumption ◽  
Thermal Resistance ◽  
Energy Efficient ◽  
Building Materials ◽  
Energy Savings ◽  
Residential Buildings ◽  
Residential Building ◽  
Economic Benefits ◽  
Building Envelope ◽  
Heat Transfers

The amount of energy consumption in the residential buildings has a very significant share with nearly 30 percent in the total amount of energy consumption. Therefore, residential sector is identified in this chapter as being one of the areas with a large potential for energy savings. Inefficient dwelling construction and design methods are widely used in Turkey and only about five percent of residential buildings are insulated. Concerning the importance and immediate need in Turkey for energy-efficient residential building retrofitting, this chapter identifies economic benefits of such retrofitting by particularly focusing on heat transfers by conductivity, where the rate can be determined by surface size, thermal resistance of the building materials and their thickness.

scholarly journals Towards Zero Energy Districts developments base on bioclimatic strategies: A Numerical Study in a Developing Country

2021 ◽  
Vol 312 ◽  
pp. 02017
Author(s):  
Lissette De León ◽  
Miguel Chen Austin ◽  
Cristina Carpino ◽  
Dafni Mora
Keyword(s):  
Energy Savings ◽  
Numerical Study ◽  
Residential Building ◽  
High Energy ◽  
Net Energy ◽  
Zero Energy ◽  
Photovoltaic Generation ◽  
Preliminary Study ◽  
Conditioning Equipment ◽  
Indoor Comfort

The need for more efficient buildings to contribute to more sustainable development has led to the establishment of targets in different countries. European countries have presented energy plans to respond to the guidelines of achieving near-zero energy buildings (nZEB). The concept can be defined at the urban scale (nZED), being a delimited part of a city with high energy efficiency and using renewable energies within its boundaries. This research aims to carry out a numerical study in a residential development in Panama, based on a proposal to redesign it, but using bioclimatic strategies and implementing photovoltaic technology. Thus, to evaluate the feasibility of nZED in the region and to function as a preliminary study to implement regulations of this type in the country. The results indicate that the indoor comfort conditions of each residential building should be evaluated in greater depth, and energy savings of 40% were obtained by implementing the recommended bioclimatic strategies and becoming independent of air conditioning equipment. In addition, photovoltaic generation outstrips demand, making the development net energy positive.

scholarly journals Energy efficiency of buildings with phase-change materials

2012 ◽  
Vol 10 (3) ◽  
pp. 343-352 ◽  
Author(s):  
Predrag Lukic ◽  
Jasmina Tamburic ◽  
Dragoslav Stojic
Keyword(s):  
Phase Change ◽  
Energy Efficient ◽  
Building Materials ◽  
Phase Change Materials ◽  
Energy Savings ◽  
Thermal Environment ◽  
Latent Energy ◽  
Energy Efficient Buildings ◽  
Effective Form ◽  
Indoor Comfort

The construction of energy efficient buildings using innovative building materials such as phase change materials, in addition to improving indoor comfort, energy savings and costs, can be achieved by increasing their market value. Because of its ability to absorb and release energy at predictable temperatures, phase change materials are effective in controlling and maintaining the thermal environment in the building. The use of phase changing materials, materials stored latent energy storage is an effective form of heat.

Economic Potentials of Energy-Efficient Residential Building Envelope Retrofitting in Turkey

2016 ◽  
pp. 340-367
Author(s):  
M. Mustafa Erdoğdu ◽  
Coşkun Karaca ◽  
Ali Kurultay
Keyword(s):  
Energy Consumption ◽  
Thermal Resistance ◽  
Energy Efficient ◽  
Building Materials ◽  
Energy Savings ◽  
Residential Buildings ◽  
Residential Building ◽  
Economic Benefits ◽  
Building Envelope ◽  
Heat Transfers

The amount of energy consumption in the residential buildings has a very significant share with nearly 30 percent in the total amount of energy consumption. Therefore, residential sector is identified in this chapter as being one of the areas with a large potential for energy savings. Inefficient dwelling construction and design methods are widely used in Turkey and only about five percent of residential buildings are insulated. Concerning the importance and immediate need in Turkey for energy-efficient residential building retrofitting, this chapter identifies economic benefits of such retrofitting by particularly focusing on heat transfers by conductivity, where the rate can be determined by surface size, thermal resistance of the building materials and their thickness.

Buildings

2017 ◽  
Author(s):  
Peter Rez
Keyword(s):  
Heat Transfer ◽  
Heat Pump ◽  
Energy Efficient ◽  
Energy Use ◽  
Fossil Fuel ◽  
Local Climate ◽  
Heating And Cooling ◽  
The Difference ◽  
As If

Most of the energy used by buildings goes into heating and cooling. For small buildings, such as houses, heat transfer by conduction through the sides is as much as, if not greater than, the heat transfer from air exchanges with the outside. For large buildings, such as offices and factories, the greater volume-to-surface ratio means that air exchanges are more significant. Lights, people and equipment can make significant contributions. Since the energy used depends on the difference in temperature between the inside and the outside, local climate is the most important factor that determines energy use. If heating is required, it is usually more efficient to use a heat pump than to directly burn a fossil fuel. Using diffuse daylight is always more energy efficient than lighting up a room with artificial lights, although this will set a limit on the size of buildings.

Sign in / Sign up

Export Citation Format

Share Document