A study on the energy performance of building façades integrated with Korean traditional window grids

2014 ◽  
pp. 343-348
Keyword(s):  
Energy Performance ◽  
Building Facades

Upgrading the Building Facades in Low-Density Residential Areas

2020 ◽  
pp. 216-243
Author(s):  
Katerina Tsikaloudaki ◽  
Dimitra Tsirigoti ◽  
Stella Tsoka ◽  
Theodore Theodosiou
Keyword(s):  
Energy Performance ◽  
Building Envelope ◽  
Building Performance ◽  
Residential Areas ◽  
Energy Needs ◽  
Building Facades ◽  
Thermal Bridging ◽  
Negative Impacts ◽  
Building Physics ◽  
Common Action

The most common action for the buildings' energy upgrade across Europe is the addition of thermal insulation on the external walls. Such interventions, although simple on their construction, cause significant changes on the building's behavior, not only on its energy needs, but also on the hygrothermal and visual performance. The effects are not always positive; for example, thicker insulation may result in lower thermal transmittance and better thermal energy performance, but on the other hand the thermal bridging effect is amplified, and the daylight levels are decreased. This research intends to quantify these impacts by analyzing the relevant parameters for different regions of Europe. The analysis aims at explaining the complicated interrelationships on the building physics' aspects encountered through interventions on the building envelope, but also at identifying appropriate measures that could counterbalance the negative impacts and enhance the overall building performance.

scholarly journals The energy retrofit of building façades in 22@ innovation district of Barcelona: energy performance and cost-benefit analysis.

2019 ◽  
Vol 609 ◽  
pp. 072067
Author(s):  
Manca Mauro ◽  
Prochazkova Zuzana ◽  
Berardi Umberto ◽  
Flores Larsen Silvana ◽  
Pich-Aguilera Felipe ◽  
...  
Keyword(s):  
Cost Benefit Analysis ◽  
Cost Benefit ◽  
Energy Performance ◽  
Benefit Analysis ◽  
Energy Retrofit ◽  
Building Facades

scholarly journals Numerical investigation of natural convection with the presence of surface roughness or complex geometries

2020 ◽  
Vol 330 ◽  
pp. 01028
Author(s):  
Mohamed Elamine GHEDHAB ◽  
Ikram EL ABBASSI ◽  
Rafik ABSI ◽  
Yannick MELINGE
Keyword(s):  
Surface Roughness ◽  
Natural Convection ◽  
Numerical Study ◽  
Energy Performance ◽  
Complex Geometries ◽  
Two Dimensional ◽  
Square Cavity ◽  
Ansys Fluent ◽  
Building Facades ◽  
Energy Equations

This paper represents a numerical study of mixed convection conduction in enclosed two- dimensional square cavity differentially heated. Complex geometries are designed on a vertical partitioned wall, those geometries are applied to building facades aiming to improve the overall energy performance of the building. Our numerical results are based on the resolution of coupled momentum and energy equations using Ansys Fluent. Numerical study has been performed for different values of the Rayleigh number. Triangular geometry element will be considered in the middle wall. Finally, temperature profile and streamlines will be analyzed to examine the influence of this studied shape.

scholarly journals Automation Analysis of Energy Performance in Building Facades

1999 ◽  
Author(s):  
M. Casals ◽  
M. Etxeberrla ◽  
P. Alavedra ◽  
P. Antentas
Keyword(s):  
Energy Performance ◽  
Building Facades

scholarly journals The influence of moisture on the energy performance of retrofitted walls

2020 ◽  
Vol 322 ◽  
pp. 01035
Author(s):  
Mafalda Amorim ◽  
Vasco Peixoto de Freitas ◽  
Isabel Torres ◽  
Tomasz Kisilewicz ◽  
Umberto Berardi
Keyword(s):  
Moisture Content ◽  
Energy Demand ◽  
Numerical Study ◽  
Building Energy ◽  
Energy Performance ◽  
Thermal Transmittance ◽  
Demand Reduction ◽  
Building Facades ◽  
Service Conditions ◽  
Transient Thermal

The renovation of old building facades should be performed mainly considering the building energy demand reduction. For this purpose, it is necessary to select retrofitted solutions that should be able of minimizing heat losses through walls. However, it is not only the nominal thermal transmittance that influences the amount of heat transported through the wall, but also the moisture content within the walls under in- service conditions. The main objective of this paper is the evaluation of the influence of the moisture content on the energy performance of retrofitted walls. A numerical study using the software WUFI Pro was carried out to quantify the influence of wind driven rain on the thermal transmittance of different wall assemblies exposed to different climates and orientations. This study reports the transient thermal transmittance of different retrofitted wall solutions as a function of moisture content.

Energy Performance of External versus Internal Shading Devices in Residential Buildings

2014 ◽  
Vol 672-674 ◽  
pp. 546-549 ◽  
Author(s):  
Yun Yang Ye ◽  
Peng Xu ◽  
Jia Chen Mao
Keyword(s):  
Experimental Test ◽  
Late Stage ◽  
Residential Buildings ◽  
Building Design ◽  
Energy Performance ◽  
Traditional Concept ◽  
Building Facades ◽  
Appearance Design ◽  
Shading Devices ◽  
The Cost

In the traditional concept, the performance of internal shading system is inferior compared with that of external one. In actual projects, however, external shadings are subject to severe limitations due to the damage of artistic appearance in building design, the high initial investment and the difficult maintenance in the late stage. Besides, in residential buildings the shading measures are single, mainly including external and internal shadings, and the window types are quite similar. Therefore, through theoretical calculation and experimental test in this paper, the feasibility of substituting the internal shading system with high reflectivity for the external one in residential buildings was analyzed. Such replacement can reduce the cost of shading system and maintain the artistic appearance of building facades. Thus, there are few limitations on the appearance design of a building considering the shading performance.

scholarly journals Innovative Method for Seismic and Energy Retrofitting of Masonry Buildings

2021 ◽  
Vol 13 (11) ◽  
pp. 6350
Author(s):  
Luca Facconi ◽  
Sara S. Lucchini ◽  
Fausto Minelli ◽  
Benedetta Grassi ◽  
Mariagrazia Pilotelli ◽  
...  
Keyword(s):  
Thermal Insulation ◽  
Steel Fiber ◽  
Thermal Analyses ◽  
Multilayer Coating ◽  
Energy Performance ◽  
Masonry Buildings ◽  
Insulation Materials ◽  
Innovative Method ◽  
Building Facades ◽  
Code Provisions

Masonry buildings built in Italy in the 60 s and 70 s of the last century frequently require energy and seismic renovation. To this end, the use of a retrofitting technique based on a multilayer coating may be applied on the building façades in order to improve its seismic and energy performances, leading to the partial or total fulfilment of structural and energy code provisions. The coating consists of a layer of Steel Fiber Reinforced Mortar combined with thermal insulation materials to get a composite package applied on the building façade. After a brief description of the proposed technique, the paper reports the results of seismic and thermal analyses carried out to prove the structural and energy performance of the retrofitting intervention.

scholarly journals LiDAR point-cloud mapping of building façades for building energy performance simulation

2019 ◽  
Vol 107 ◽  
pp. 102905 ◽  
Author(s):  
James O’Donnell ◽  
Linh Truong-Hong ◽  
Niamh Boyle ◽  
Edward Corry ◽  
Jun Cao ◽  
...  
Keyword(s):  
Point Cloud ◽  
Building Energy ◽  
Energy Performance ◽  
Performance Simulation ◽  
Building Energy Performance ◽  
Building Facades

Impact of roof shading on building energy performance in warm & humid climatic places of India

2020 ◽  
pp. 50-64
Author(s):  
Kuladeep Kumar Sadevi ◽  
Avlokita Agrawal
Keyword(s):  
Energy Consumption ◽  
Energy Conservation ◽  
Energy Performance ◽  
General Assumption ◽  
Climatic Conditions ◽  
Building Envelope ◽  
Passive Cooling ◽  
Base Case ◽  
U Value ◽  
The Impact

With the rise in awareness of energy efficient buildings and adoption of mandatory energy conservation codes across the globe, significant change is being observed in the way the buildings are designed. With the launch of Energy Conservation Building Code (ECBC) in India, climate responsive designs and passive cooling techniques are being explored increasingly in building designs. Of all the building envelope components, roof surface has been identified as the most significant with respect to the heat gain due to the incident solar radiation on buildings, especially in tropical climatic conditions. Since ECBC specifies stringent U-Values for roof assembly, use of insulating materials is becoming popular. Along with insulation, the shading of the roof is also observed to be an important strategy for improving thermal performance of the building, especially in Warm and humid climatic conditions. This study intends to assess the impact of roof shading on building’s energy performance in comparison to that of exposed roof with insulation. A typical office building with specific geometry and schedules has been identified as base case model for this study. This building is simulated using energy modelling software ‘Design Builder’ with base case parameters as prescribed in ECBC. Further, the same building has been simulated parametrically adjusting the amount of roof insulation and roof shading simultaneously. The overall energy consumption and the envelope performance of the top floor are extracted for analysis. The results indicate that the roof shading is an effective passive cooling strategy for both naturally ventilated and air conditioned buildings in Warm and humid climates of India. It is also observed that a fully shaded roof outperforms the insulated roof as per ECBC prescription. Provision of shading over roof reduces the annual energy consumption of building in case of both insulated and uninsulated roofs. However, the impact is higher for uninsulated roofs (U-Value of 3.933 W/m2K), being 4.18% as compared to 0.59% for insulated roofs (U-Value of 0.33 W/m2K).While the general assumption is that roof insulation helps in reducing the energy consumption in tropical buildings, it is observed to be the other way when insulation is provided with roof shading. It is due to restricted heat loss during night.

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