Keyword: building

4 results found.

Research Article
Thermal Performance Assessment of External Wall Construction for Energy-Efficient Buildings
European Journal of Sustainable Development Research, 2022, 6(3), em0189,
ABSTRACT: Building envelope such as external walls are still constructed from poor materials which results in higher heating and cooling loads thereby raising energy bills. Improving building energy efficiency with advanced technologies is being sought. In this context, a numerical study was conducted to solve the coupled heat transfers through a standard wall structure used in Libyan residential buildings. Different techniques were compared to reduce the thermal transmittance of the traditional wall structure for saving energy including the application of radiant shield, low-e coating, insulating filling and external insulation. The numerical results revealed that the thermal radiation inside the cavities of hollow block is important and accounts for 21% of total heat transfer, while conductive and convective heat transfer contributes by 65% and 14% from the total, respectively. The obtained thermal transmittance value of the common wall structure was considered as high as 2.33 W/m2·K due to lower resistance of wall elements. The adoption of 50 mm layer of expanded polystyrene insulation (EPS) to the exterior wall showed the best thermal performance with a reduction of thermal transmittance by 45%. On the other hand, filling the interior of cavities with EPS resulted in a 37% reduction of thermal transmittance compared to 20% of using 3 mm aluminum foil as a radiant barrier in the middle of the cavities. The last case was less effective with a reduction of almost 10% when a commercial coating of 0.4 surface emissivity was applied to the interior of cavities.
Research Article
Numerical Simulation of Wind Impacts on Building Blocks: Towards Sustainable Architecture Strategies
European Journal of Sustainable Development Research, 2019, 3(4), em0096,
ABSTRACT: The study of wind behavior around tall buildings is a critical issue in architectural and structural design. Therefore, Tall modern buildings are extremely sensitive to the wind. Thus, the assessment of wind loads to design these buildings is essential. Monitoring the wind, which is forcing extraordinary tall buildings is highly challenging. By looking at recent constructions in Iran, it is obvious that despite the fact that constructing tall buildings is spreading, there is less concentration on environmental factors such as wind’s aerodynamic. The purpose of this study is to introduce a theoretical framework. Hence, by using CFD simulation, investigating on wind speed in various regions of the tall-triangular building have been focused. Finally, Autodesk Flow Design 2014 software is utilized to present a CFD simulation of a building model with a triangular footprint, Rounded Corner aerodynamic correction, and Set-back aerodynamic form. These simulations have been looking forward to finding out about how can aerodynamic forms affect pressure zone reduction in buildings and reduce wind flow pattern in urban regions.
Research Article
Ecological Footprint Assessment and Reduction of an Academic Building in Shahdol (India)
European Journal of Sustainable Development Research, 2018, 2(4), 42,
ABSTRACT: Buildings are responsible for significant natural resource consumption, waste generation, and environmental pollution. Building impacts are generally assessed through life cycle analysis (LCA). This study integrates LCA with the Ecological Footprint indicator for the assessment of a building's impact on the planet. In order to determine ecological impact of a building, a methodology has been established for estimation of Life Cycle Ecological Footprint (LCEFtotal) of the building, as well as to assess its impact due to resource consumption (energy, water, building materials, manpower etc.) and waste assimilation over the lifecycle. For an academic building located in India taken as a case study, the LCEFtotal is found to be 4397.03 gha and the LCEFtotal per unit floor area is 0.60 gha/m2. The average annual Ecological Footprint (EFavg) of the academic building is 73.28 gha/yr that is approximately 20 times more than the actual physical land of the campus. The average annual Ecological Footprint per student (EFavg/student) of the academic building is 0.045 gha/yr/student. If annual grid electricity consumption of the building is replaced by the grid-connected rooftop photovoltaic (GRSPV) system in the ratios of 100%, 75%, 50% and 25%, it can reduce up to 61%, 54%, 31%, and 15% of the total LCEFtotal of the academic building, respectively.
Research Article
Balancing Comfort and Energy Use for Sustainable Buildings: Thermal Comfort Modeling using a Space-variant Manikin
European Journal of Sustainable Development Research, 2018, 2(1), 07,
ABSTRACT: To help balance comfort and energy use in residential, institutional and commercial buildings in order to make them more sustainable, a thermal comfort model is coupled with a computational fluid dynamic approach. The developed tool provides an effective tool for demand side management of energy use in buildings. The asymmetrical thermal environment in a university cafeteria building is modeled, and a two dimensional numerical simulation is prepared separately of the thermal sensation in the cafeteria. A finite volume formulation is used to provide the temperature distribution around a space-variant manikin, which is in turn utilized to determine the convective heat transfer coefficients for the simulation of thermal sensation around the manikin.