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Simulation Based Analysis On The Effects Of Orientation On Energy Performance Of Residential Buildings In Ghana
C Koranteng, EG Abaitey
Journal of Science and Technology (Ghana) , 2009,
Abstract: Since the energy crisis in 2007, energy performance of buildings is gradually becoming an issue in Ghana. The authors of this paper used simulation as a tool to analyse three conventional resi-dential building types, in order to see the effects of orientation on energy performance, specifi-cally on cooling loads. The three building types; a single storey square block, a single storey rec-tangular block and a two storey square block with different thermal properties were modelled and simulated. Alternate north angles were used and results compared for the best orientation resulting in minimum cooling loads in the climatic context of Kumasi, Ghana. The results on the rectangular building indicated the best orientation as being north and south. No particular ori-entation could be recommended for the single and two storey building (with square plans) and this showed that the influence of other factors such as windows, configuration and function of spaces, and building mass directly affected cooling loads and eventually orientation.
Facades of Tall Buildings - State of the Art  [cached]
Umarani Gunasekaran,Premalatha Emani,Aruna Malini T.P
Modern Applied Science , 2010, DOI: 10.5539/mas.v4n12p116
Abstract: Fa ades, the first aesthetical feature of a building which distinguishes one building from another, have to fulfill the basic aspects like protection against fire and burglary, climatic influence and environmental pollution. Development in facades has made it more functional, providing designers with the flexibility to create high performance solutions, which are visually exciting, both internally and externally. This paper is the state-of-art discussing the types of glasses in facades, their applications, functional and strength requirements in tall buildings.
A Study on Reduction of Cooling Energy in Glazed Buildings  [PDF]
Shaharin A. Sulaiman,Siti Nurfadilah A. Mujor,S.Z. Huda S.T. Ariffin,Rawaida Muhammad
Journal of Applied Sciences , 2012,
Abstract: Large scale air conditioning applications are one of the major energy consumers in hot and humid countries like Malaysia. For building complexes such as those in a university, the cooling energy varies depending on the varying activities of students and staff. Some of these buildings are intentionally designed and built by architects for aesthetic values and those with building envelope that comprises large areas of glazing consequently face high energy cost of air-conditioning due to the high heat gain through solar radiation. Due to the present uncertainties in the cost and availability of local and global energy, along with the environmental problem related to global warming, studies on how to reduce cooling energy in highly glazed buildings are imperative. The objective of the present work is to study a few possible strategies to reduce energy consumption through the air conditioning systems in a highly glazed academic building. The strategies considered in the study are through forced reduction of air-conditioning load during lunch-time and during rain and also by switching off some of the lights during office hours. The study is conducted by computer simulation using EnergyPlus software which estimates the cooling energy of a building or areas. It is found in the study that the strategies for reduction of cooling energy have potentials and are practical for implementation in the buildings.
Ventilated facades: review of main problems
D.V. Nemova
Magazine of Civil Engineering , 2010,
Abstract: The design of ventilated facades becomes more and more popular.Ventilated facades are installed on erected and reconstructed public, office and residential buildings.In this article the basic problems relating to the ventilated facade system are considered. The design, installation process, thermotechnical properties, fire safety, economic efficiency are considered. The purpose of the article is the prevention in practice the most often errors which arise in time of installation, operation and dismantle of such systems.After the analysis following basic problems of systems with ventilated facades have been allocated:calculation of necessary air gap;selection of qualitative materials and installation;fire safety;maintenance of required hermal resistance.Application of ventilated facades systems for warming of buildings and increasing of their power efficiency demands the thought over and complex approach. Such systems are not so economic, energy effective and durable as it is considered to be.
Building envelope innovation: smart facades for non residential buildings  [cached]
Marco Sala,Rosa Romano
Techne : Journal of Technology for Architecture and Environment , 2011,
Abstract: The research analyzes the evolution of smart fa ade systems in the area of design and industrial production, in order to investigate the technological, functional and qualitative standards of dynamic fa ade and evaluate the energy performance of the building envelope as a dynamic system that interacts between indoor and outdoor environment. The study focused on dynamic envelopes for office building analyzing the evolution of fa ade systems in terms of: building construction, innovative systems, smart materials, dynamic system. Aiming to improve building energy performances. The research, developed during the PhD thesis “Smart Envelope - dynamic and innovative technologies for energy saving” and the research “Abitare Mediterraneo”, aims to identify and define the energy performances of smart envelopes trough the analysis of the state of art, related to dynamic building envelope of double skin fa ade, and the development of a new dynamic fa ade system.
Statistical Process Control Concerning the Glazed Areas Influence on the Energy Efficiency of Buildings  [PDF]
Daniel Lep?datu,Irina Bliuc,Baran Irina
Bulletin of the Polytechnic Institute of Jassy, Constructions, Architechture Section , 2008,
Abstract: The aim of this paper is to present a statistical investigation, for analyzing the buildings characteristics from the energy efficiency point of view. The energy efficiency of buildings may be estimated by their capacity to ensure a healthy and comfortable environment, with low energy consumption during the whole year. The glazed areas have a decisive role in the building energy efficiency having in view the complex functions that they play in the system. A parametric study, based on the method of factorial plan of experience with two levels, allows us to emphasize the measure in which the geometric and energetic characteristics of glazed areas influence the energy efficiency, estimated by the yearly energy needs, to ensure a comfortable and healthy environment.
A DFuzzy-DAHP Decision-Making Model for Evaluating Energy-Saving Design Strategies for Residential Buildings  [PDF]
Kuang-Sheng Liu,Sung-Lin Hsueh,Wen-Chen Wu,Yu-Lung Chen
Energies , 2012, DOI: 10.3390/en5114462
Abstract: The construction industry is a high-pollution and high-energy-consumption industry. Energy-saving designs for residential buildings not only reduce the energy consumed during construction, but also reduce long-term energy consumption in completed residential buildings. Because building design affects investment costs, designs are often influenced by investors’ decisions. A set of appropriate decision-support tools for residential buildings are required to examine how building design influences corporations externally and internally. From the perspective of energy savings and environmental protection, we combined three methods to develop a unique model for evaluating the energy-saving design of residential buildings. Among these methods, the Delphi group decision-making method provides a co-design feature, the analytical hierarchy process (AHP) includes multi-criteria decision-making techniques, and fuzzy logic theory can simplify complex internal and external factors into easy-to-understand numbers or ratios that facilitate decisions. The results of this study show that incorporating solar building materials, double-skin facades, and green roof designs can effectively provide high energy-saving building designs.
Analysis of Annual Cooling Energy Requirements for Glazed Academic Buildings  [PDF]
Shaharin A. Sulaiman,Ahmad H. Hassan
Journal of Applied Sciences , 2011,
Abstract: The objective of the present study was to analyze the annual cooling energy of highly glazed academic buildings which are located in a university in Malaysia. The outcome of the study would enable further remedial actions in reducing the energy consumption of the buildings air conditioning system. The study is conducted by computer simulation using EnergyPlus software to calculate the cooling energy of a selected building or areas. Comparison is made against the rated equipment load (i.e., the air handling unit) installed in the buildings. Since the buildings in the present study are not constructed parallel to each other the effect of building orientations with respect to the sun positions are also studied. The implications of shades such as venetian blind on the cooling energy are investigated in assessing their effectiveness in reducing the cooling energy, apart from providing thermal comfort to the occupants. In the aspect of operation, the present study includes the effects of reducing the set point air temperature and infiltration of outdoor air due to doors that are left open by the occupants. It is found from the present study that there are significant potentials for savings in the cooling energy of the buildings.
The Effects of Orientation, Ventilation, and Varied WWR on the Thermal Performance of Residential Rooms in the Tropics  [cached]
Nedhal Ahmed M. Al-Tamimi,Sharifah Fairuz Syed Fadzil,Wan Mariah Wan Harun
Journal of Sustainable Development , 2011, DOI: 10.5539/jsd.v4n2p142
Abstract: Building orientation is a significant design consideration, mainly with regard to solar radiation and wind. In predominantly hot humid regions like Malaysia which receives sunlight all year around, buildings should be oriented to minimize solar gain and maximize natural ventilation. This paper describes an investigation into the effect of building orientation in view of solar radiation absorptance of exterior wall, varied area ratio of glazed window to wall and the effect of natural ventilation on the thermal performance for residential building in tropical region. The FAJAR BAKTI building (postgraduate student residential building) which is oriented in the east west directions, and a located in USM Campus, Penang. The selected case study are two rooms, the first one is facing east direction while the other faced west. The differences in in/out door air temperature and air velocity of both rooms have been measured from the field directly using the comprehensive datalogger BABUC/M, this data have been analyzed and investigated. The results shows that east windows have more obvious effect on increasing indoor air temperature than west windows, that is applicable for ventilated or unventilated rooms.
ENERGY EFFICIENCY OF RESIDENTIAL BUILDINGS IN SERBIA
Dragoslav ?umarac,Maja Todorovi?,Maja Djurovi? - Petrovi?,Nata?a Tri?ovi?
Thermal Science , 2010, DOI: tsci100430017s
Abstract: In this paper, presented is the state of the art of Energy Efficiency (EE) of residential buildings in Serbia. Special attention is paid to energy efficiency in already existing buildings. The average energy consumption in residential buildings in Serbia is over 150 kWh/m2 per year, while in developed European countries it is about 50 kWh/m2 per year. In this paper examined is the contribution of ventilation losses, through the windows of low quality, regardless whether they are poorly made, or made from bad materials, or with no adequate glass. Besides ventilation losses, which are of major importance in our buildings, special attention is paid to transmission losses, which are consequence of the quality and energy efficiency of the facade. All of the above statements are proved by measurements obtained on a representative building of the Block 34 in New Belgrade, built in the eighties of the last century. In addition to measurements performed the calculation of energy consumption for heating during winter has been made. The results of two different methods of calculation of energy consumption for heating are compared with the values obtained by measuring.
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