scholarly journals The Effects of Exterior Thermal Mass (eTM) on Energy Consumption in Residential Buildings

2019 ◽  
Vol 3 (1) ◽  
pp. 14
Author(s):  
Amir Ghoreishi
Keyword(s):  
Quantitative Research ◽  
Residential Buildings ◽  
Energy Performance ◽  
Climatic Conditions ◽  
Influential Factors ◽  
The Body ◽  
Thermal Mass ◽  
Body Of Knowledge ◽  
Wide Range ◽  
Integrated Performance

Exterior Thermal Mass (eTM) is known to improve building energy and thermal comfort performance. Despite its known benefits, studies to date have not thoroughly addressed the effects of eTM on building environmental performance by considering a wide range of influential factors and various climatic conditions. This paper addresses such a gap in the body of knowledge by conducting a comprehensive and detailed analysis of eTM impacts on residential buildings’ energy performance. Using quantitative research and simulation analyses, this study has found various trends of energy reductions and, in a few cases, energy increases depending upon the location of projects. In fact, the cooling energies are shown to increase of up to 4% for the scenario of 20 cm thickness wall in several locations. Aiming for better energy and design load scenarios, this research has also established the optimal eTM depth to help architects and engineers make informed design decisions with regard to building envelopes, which is particularly important for developing countries with similar climates studied in this paper, where the use of masonry materials is widely common. As for future steps, further exploration of cooling energy increase phenomenon, which was observed for several climates is recommended. Also, coupling eTM with code-required thermal insulation based upon specific climatic locations and evaluate their integrated performance can be considered.

scholarly journals Parametric Study of Air Infiltration in Residential Buildings—The Effect of Local Conditions on Energy Demand

Energies ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 127
Author(s):  
Artur Miszczuk ◽  
Dariusz Heim
Keyword(s):  
Energy Demand ◽  
Computational Models ◽  
Residential Buildings ◽  
Energy Performance ◽  
Climatic Conditions ◽  
Physical Parameters ◽  
Local Conditions ◽  
Change Rate ◽  
Air Change Rate ◽  
Wide Range

Airtightness is nowadays one of the physical parameters which determine overall building energy performance. In a wide range of states, the upper limit for air change rate at a Pa (na), air permeability rate at a Pa (qa), or specific leakage rate at a Pa (wa) is determined by the formal regulations. It should be highlighted that airtightness requirements are mainly the same around the world, disregarding any site and climatic conditions. The main goal of the presented work was to reveal the effect of individual location and surrounding infiltration rate and heat demand. The analyses were done using numerical techniques and computational models of the three buildings developed and calibrated based on the blower door test results. The compared buildings characterize by a similar geometry but differ in the air change rate at 50 Pa (n50). Analyses done for different locations and levels of sheltering by surrounding elements allow the determination of the real effect of local conditions. The obtained differences in energy demand between two locations from the same climatic zone were from 70% to 90%, depending on the airtightness of the buildings. Considering different sheltered conditions, the differences for the same location can be even 200%. The obtained results allowed for the formulation of the general conclusion that building location and level of exposure could be considered in future airtightness regulations.

scholarly journals RINNO: Towards an Open Renovation Platform for Integrated Design and Delivery of Deep Renovation Projects

2021 ◽  
Vol 13 (11) ◽  
pp. 6018
Author(s):  
Theo Lynn ◽  
Pierangelo Rosati ◽  
Antonia Egli ◽  
Stelios Krinidis ◽  
Komninos Angelakoglou ◽  
...  
Keyword(s):  
Value Chain ◽  
Residential Buildings ◽  
Integrated Design ◽  
Energy Performance ◽  
Building Stock ◽  
Existing Building ◽  
Horizon 2020 ◽  
Regulatory Standards ◽  
Automation Systems ◽  
Wide Range

The building stock accounts for a significant portion of worldwide energy consumption and greenhouse gas emissions. While the majority of the existing building stock has poor energy performance, deep renovation efforts are stymied by a wide range of human, technological, organisational and external environment factors across the value chain. A key challenge is integrating appropriate human resources, materials, fabrication, information and automation systems and knowledge management in a proper manner to achieve the required outcomes and meet the relevant regulatory standards, while satisfying a wide range of stakeholders with differing, often conflicting, motivations. RINNO is a Horizon 2020 project that aims to deliver a set of processes that, when working together, provide a system, repository, marketplace and enabling workflow process for managing deep renovation projects from inception to implementation. This paper presents a roadmap for an open renovation platform for managing and delivering deep renovation projects for residential buildings based on seven design principles. We illustrate a preliminary stepwise framework for applying the platform across the full-lifecycle of a deep renovation project. Based on this work, RINNO will develop a new open renovation software platform that will be implemented and evaluated at four pilot sites with varying construction, regulatory, market and climate contexts.

Development of a numerical approach to assess the effect of coupled heat and moisture transfer on energy consumption of residential buildings in Moroccan context

2021 ◽  
pp. 174425912110560
Author(s):  
Yassine Chbani Idrissi ◽  
Rafik Belarbi ◽  
Mohammed Yacine Ferroukhi ◽  
M’barek Feddaoui ◽  
Driss Agliz
Keyword(s):  
Energy Consumption ◽  
Building Materials ◽  
Moisture Transfer ◽  
Residential Buildings ◽  
Building Design ◽  
Energy Performance ◽  
Climatic Conditions ◽  
Heat And Moisture Transfer ◽  
Coupled Heat And Moisture ◽  
Heat And Moisture

Hygrothermal properties of building materials, climatic conditions and energy performance are interrelated and have to be considered simultaneously as part of an optimised building design. In this paper, a new approach to evaluate the energy consumption of residential buildings in Morocco is presented. This approach is based on the effect of coupled heat and moisture transfer in typical residential buildings and on their responses to the varied climatic conditions encountered in the country. This approach allows us to evaluate with better accuracy the response of building energy performance and the indoor comfort of building occupants. Annual energy consumption, cooling and heating energy requirements were estimated considering the six climatic zones of Morocco. Based on the results, terms related to coupled heat and moisture transfer can effectively correct the existing energy consumption calculations of the six zones of Morocco, which currently do not consider energy consumption due to coupled heat and moisture transfer.

scholarly journals Performance Analyses of Temporary Membrane Structures: Energy Saving and CO2 Reduction through Dynamic Simulations of Textile Envelopes

2018 ◽  
Vol 10 (7) ◽  
pp. 2548 ◽  
Author(s):  
Mariangela De Vita ◽  
Paolo Beccarelli ◽  
Eleonora Laurini ◽  
Pierluigi De Berardinis
Keyword(s):  
Energy Saving ◽  
Environmental Sustainability ◽  
Co2 Reduction ◽  
Energy Performance ◽  
Climatic Conditions ◽  
Point Of View ◽  
Thermal Mass ◽  
Membrane Structures ◽  
Dynamic Simulations ◽  
Carbon Reduction

The aim of this research, carried out in collaboration with Maco Technology Inc., was to analyse the energy performance of temporary textile structures that are often used to host itinerant events. This paper illustrates the dynamic simulations carried on the Ducati Pavilion, designed by Maco Technology, which hosted Ducati staff during the different stages of the Superbike World Championship. Specific aspects relating to the structural/constructive system of the project were also analysed. The theme of energy saving and carbon reduction is of great importance in temporary and itinerant structures and environmental sustainability in relation to the materials used, storage, re-use, mode of transport and ability to respond efficiently to the climatic conditions of the installation sites is an important aspect. The Ducati Pavilion was modelled and analysed from an energy point of view using Design Builder software. Ways of improving performance were analysed under summer conditions. The paper focuses on the importance of optimizing the performance of textile envelopes: the methodology proposed allows visible savings in terms of energy consumption and achieves good levels of environmental comfort in temporary buildings with low thermal mass structure.

scholarly journals Impact of Wall Constructions on Energy Performance of Switchable Insulation Systems

Energies ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 6068
Author(s):  
Remy Carlier ◽  
Mohammad Dabbagh ◽  
Moncef Krarti
Keyword(s):  
Energy Savings ◽  
Simulation Analysis ◽  
Residential Buildings ◽  
Energy Performance ◽  
Space Heating ◽  
Thermal Mass ◽  
Analysis Tool ◽  
Insulation Systems ◽  
Detached House ◽  
Modeling Strategy

This paper evaluates the potential energy savings when switchable insulation systems (SIS) are applied to walls of residential buildings located in Belgium and other locations in Europe. The study considers two low-energy prototypical dwellings (an apartment and a detached house) that are representative of post-2010 constructions and renovations in Belgium. Using an 3R2C-based analysis tool, the performance of both dwellings is evaluated with static and dynamic wall insulation systems. First, the switchable insulating system is described along with its associated simple 2-step rule-based control strategy. Then the modeling strategy and simulation analysis tools are presented. In Belgium, it was found that SIS-integrated walls allow energy savings up to 3.7% for space heating and up to 98% for cooling. Moreover, it was found that to further reduce the energy consumption of SIS-integrated buildings in various European climates, thermal mass placement needs to be considered. By optimizing the placement and the parameters of the various wall layers, it is possible to increase the space heating savings by up to a factor of 4 and those of cooling by up to a factor of 2.5.

EXPLORING FACTORS AFFECTING SUPPLY CHAIN RELATIONSHIPS CONSTRUCTION

2020 ◽  
Vol 43 (01) ◽  
Author(s):  
VIET THANH NGUYEN
Keyword(s):  
Supply Chain ◽  
Essential Element ◽  
Influential Factors ◽  
The Body ◽  
Additional Contribution ◽  
Management Support ◽  
Factors Affecting ◽  
Body Of Knowledge ◽  
Supply Chain Relationships ◽  
Trust Business

Managing business relationships between the parties in construction supply chains (CSCs) is the essential element of construction supply chain management (CSCM). Therefore, in order to have success in the CSCM, the relationships between the parties should be noticed. This study aims to identify and discover important factors affecting supply chain relationships in construction. The study identified 12 key factors affecting the supply chain relationships in construction and ranked them according to their degrees of impact. The findings showed that “working relationship”, “top management support”, “trust”, “business attitude”, and “communication” are the five most influential factors. The study can be considered as valuable additional contribution to the body of knowledge relating to the CSCM. The findings could help practitioners to have an insight into the CSCM and obtain success in managing the CSCs.

Ecological houses of Southern Kazakhstan using renewable energy sources

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Ardasher Namazbay Yussupov ◽  
Akmaral Ardasherovna Yussupova
Keyword(s):  
Renewable Energy ◽  
Rural Areas ◽  
Building Materials ◽  
Residential Buildings ◽  
Renewable Energy Sources ◽  
Local Population ◽  
Climatic Conditions ◽  
Energy Sources ◽  
Content Type ◽  
Wide Range

PurposeThe purpose of this article discusses the design of underground eco-houses using a dome structure of light construction while taking into account the historical experience of the development of the local population. This article considered the traditions of folk architecture and modern sophistication in the creation of energy-efficient eco-houses in foreign countries in the context of architecture and construction of affordable residential homes for the local population.Design/methodology/approachThe research presented in this paper was motivated by the need for developing agro-tourism facilities in hard-to-reach areas of the Silk Road in Southern Kazakhstan causes the construction of eco-houses built using local construction materials. Since ancient times in Southern Kazakhstan and during seasonal migrations in yurts of light construction, people have lived in mud-brick houses deep in the ground. Along with architectural and artistic solutions in building construction, great importance was attached to saving material resources, labour costs and achieving heat stability of residential buildings.FindingsIn the architectural and planning solution of the eco¬-house, progressive directions of construction of agrotechnical structures using renewable energy sources are adopted. Particular importance was given to the choice of the construction site on an elevated area nearby historical monuments and a favourable season for the construction of eco-houses with considering the natural and climatic characteristics of rural areas of Southern Kazakhstan.Research limitations/implicationsThis paper discussed the issues of insulation, ventilation and improving the eco-house microclimate comfort using local building materials. Improving the architectural and artistic expressiveness of the eco-house in terms of the tradition of folk architecture was also explicitly discussed in this paper.Practical implicationsTables with the justification of expediency of construction of economical eco-houses in natural and climatic conditions of Kazakhstan and Central Asia are provided. The results help to improve the energy efficiency of eco-houses in Kazakhstan by using renewable energy sources.Social implicationsSocial benefits are associated with the use of local raw materials. Eco-houses built from traditional building materials can become accessible to a wide range of people and stimulate the development of small businesses. This may be associated with the construction of eco-houses to serve visiting tourists in remote picturesque oases, as well as the manufacture of dome structures, felt products and the preparation of reed panels and so on.Originality/valueThe thermotechnical characteristics of the region's ground energy are given, which can significantly save the cost of heating the eco-house. Solutions for optimal insolation, ventilation of the eco-house are provided, taking into account the natural and climatic conditions of Southern Kazakhstan.

scholarly journals Energy and Luminous Performance Investigation of an OPV/ETFE Glazing Element for Building Integration

Energies ◽  
2019 ◽  
Vol 12 (10) ◽  
pp. 1870
Author(s):  
Álex Moreno ◽  
Daniel Chemisana ◽  
Rodolphe Vaillon ◽  
Alberto Riverola ◽  
Alejandro Solans
Keyword(s):  
Energy Performance ◽  
Climatic Conditions ◽  
Organic Photovoltaic ◽  
Net Energy ◽  
Coverage Area ◽  
Wide Range ◽  
Balancing Energy ◽  
The One ◽  
Electrical Generation ◽  
Ethylene Tetrafluoroethylene

The combination of architectural membranes such as ethylene tetrafluoroethylene (ETFE) foils and organic photovoltaic (OPV) cells offers a wide range of possibilities for building integration applications. This is due to their flexibility, free-shape, variable color and semitransparency, light weight, cost-effectivity, and low environmental impact. In addition, electrical generation is provided. Four configurations of ETFE foils designed to be integrated onto a south façade glazing element were studied for two representative European locations with different climatic conditions: Barcelona and Paris. These configurations comprise a reference one based on a double ETFE foil with a 10 mm air gap in between, and the other three incorporate on the inner ETFE foil either OPV cells covering 50% or 100% of its surface or a shading pattern printed on it covering 50% of its surface. Results show that, in terms of energy, the configuration with higher OPV coverage area is the one achieving the lowest net energy consumption in both locations. However, when looking at the illumination comfort this option results in insufficient illumination levels. Therefore, a tradeoff strategy balancing energy performance and illumination comfort conditions is necessary. Based on that, the best solution found for both cities is the configuration integrating OPV cells covering 50% of the glazing area and for a window to wall ratio of 0.45.

scholarly journals Developing Invasive Weed, Social Spider, Shuffled Frog Leaping, Biogeography-Based, and Harmony Search Optimization Algorithms for the Early Prediction of Residential Building’s Cooling Load Simulation

2021 ◽  
Author(s):  
Hossein Moayedi ◽  
Amir Mosavi
Keyword(s):  
High Efficiency ◽  
Residential Buildings ◽  
Harmony Search ◽  
Energy Performance ◽  
Influential Factors ◽  
Early Prediction ◽  
Cooling Load ◽  
Invasive Weed ◽  
Social Spider ◽  
Shuffled Frog Leaping

Regarding the high efficiency of metaheuristic techniques in energy performance analysis, this paper scrutinizes and compares five novel optimizers, namely biogeography-based optimization (BBO), invasive weed optimization (IWO), social spider algorithm (SOSA), shuffled frog leaping algorithm (SFLA), and harmony search algorithm (HSA) for the early prediction of cooling load in residential buildings. The algorithms are coupled with a multi-layer perceptron (MLP) to adjust the neural parameters that connect the CL with the influential factors. The complexity of the models is optimized by means of a trial-and-error effort, and it was shown that the BBO and IWO need more crowded spaces for fulfilling the optimization. The results revealed that the internal parameters (i.e., biases and weights) suggested by the BBO generate the most reliable MLP for both analyzing and generalizing the CL pattern (with nearly 93 and 92% correlations, respectively). Followed by this, the IWO emerged as the second powerful optimizer with mean absolute errors of 1.8632 and 1.9110 in the training and testing phases. Therefore, the BBO-MLP and IWO-MLP can be reliably used for accurate analysis of the CL in future projects.

scholarly journals An empirical investigation of banks employees’ interactions and workflow influence during social media advent: a case study of two commercial banks

2016 ◽  
Vol 11 (4) ◽  
pp. 90-96 ◽  
Author(s):  
Khulekani Yakobi
Keyword(s):  
Social Media ◽  
Commercial Banks ◽  
Quantitative Research ◽  
Jel Classification ◽  
The Body ◽  
Human Interaction ◽  
Major Influence ◽  
Research Approach ◽  
Team Management ◽  
Body Of Knowledge

The primary aim of this study is to investigate commercial banks employee’s interactions in the advent and eminence of social media, thus, depict the major influence which is made by social media in two commercial banks (ABSA and Standard Bank) workflow. This study has employed a quantitative research approach whereby structured questionnaires were distributed respectively to two commercial banks’ employees. A self-developed and administered questionnaire was distributed to a population size of 194 employees with 102 returned and completed successfully, thereby generating a response rate of 53%. Findings in this study revealed the extent to which social media has changed workflow in commercial banks (54% agree, 23% were undecided, and 24% disagreed). Among other major findings that this study reflected, social media among commercial banks employees’ has totally transformed channels of communication (60% agreed, 25% were undecided, and 24% disagreed). Despite the positive advancements revealed in this study, social media has not allowed openness of emotions among commercial banks employees’ (49% agreed, 28% were undecided, and 24% disagreed). This study is expected to contribute to the body of knowledge, as there is a paucity of published studies on commercial banks employee’s interactions in the advent of social media. This study will also help the bank managers to intensify online team management and supervision. Keywords: collaboration, communications, employees’ emotions, human interaction, supervision, team management. JEL Classification: G21, M30, M54

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