Evaluating different scenarios for optimizing energy consumption to achieve sustainable green building in Malaysia (original) (raw)
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MATEC Web of Conferences
In recent years, energy consumption has become a critical issue in the developed and developing countries. Residential buildings are one of the most users of energy in the construction sector that use the highest share of energy. This paper aims at evaluating the effect of four factors that are temperature, humidity, airflow and pressure on the cooling load in the residential buildings. To achieve this goal, statistical experimental design is used to determine the optimum setting of factors that result in optimum energy usage. Simulation software and energy analysis is used to simulate a two-storey building in Malaysia as the case of study. Final results showed that the temperature, humidity and interaction between them have the most significant effect on the energy cooling load. Moreover, to obtain the minimum value of cooling load the temperature and humidity should be equal to A=20 Celsius degree and B=60% respectively. In addition, the other two insignificant factors, airflow and pressure should be placed at the high level which are equal to C=3 cubic meters per hour, and D=6 Pascal (P) respectively.
Energy consumption has become an increasingly controversial issue in the modern world. Among the widest range of energy consumers, residential buildings consume the largest amount of energy most of which is consumed by air conditioning systems in tropical countries. This paper attempted to examine energy saving in building elements such as walls, floors, windows, roofs, and ceilings and how the integration of such optimized elements in conjunction with effective air quality factor can contribute towards an ultimate energy efficient design. A typical two-storey terraced house in Kuala Lumpur, Malaysia was chosen to model energy usage by means of dynamic building Simulation. A case study was modeled using Revit Architecture software and analyzed using energy analysis software. Current energy consumption patterns were identified and the optimal level of energy usage was determined by replacing components with new energy efficient materials. Afterward, a Design of Experiment (DOE) method was used and the best combination of factor was identified. The results indicated that in residential buildings in tropical regions, changing ceilings and ceiling materials are the most effective way to reduce energy consumption; moreover, wall materials and inside temperatures were in the next levels of significant factors respectively. Theseresultscanbeusedtohelpbuildingdesignersachieveoptimumcoolingloadsavings.
2014
Green building and energy consumption are two important issues in the construction industry. Residential buildings use the biggest share of energy throughout the world. Based on investigations, most of the existing green buildings are not really energy efficient. The estimation of energy consumptions for building has become a critical approach to achieve the goals on energy consumption and to decrease emissions. There are multiple factors for energy performance of buildings, such as building characteristics, main elements and equipment, climate factors, occupants and sociological influences. This paper shows a study of energy saving enhancement methods in residential buildings by considering the three climate factors that are temperature, humidity and airflow. To achieve this goal, building simulation and classical Design of Experiment (DOE) were combined to assess the effect of these climate factors on energy saving and cooling load. Based on the ANOVA test analysis, temperature and humidity have the most significant effect on energy saving. Moreover, the optimum saving energy within the range of the model with the value of 191525 is gained at the A (temperature) and B (humidity), which are equal to 20 °C and 60%, respectively.
Potential of Energy Saving through Modification of Low Energy Housing Models
KnE Social Sciences
Globally, building sector currently consumes around of 40 percent of total energy and it is predicted to further rapidly increasing up to 80 percent by 2040. This study aims to investigate some design options to achieve thermal comfort and reduce energy consumption. In Indonesia, building sector consumes around of 37.8 percent of the total nationwide energy consumption. Computer simulations using EDGE and EnergyPlus were performed in this study to obtain embodied energy value and obtain operative temperature respectively. EDGE uses monthly quasi-steady-state calculation method based on the European CEN5 and ISO 13790 standards while EnergyPlus uses dynamic simulation model based on hour-by-hour (or higher resolution) outputs. A single storey building with 12 different parameters and design configurations including one base model were developed for this simulation. Some parameters were evaluated such as wall materials, roof materials, Window to Wall Ratio (WWR), window shading, venti...
Development and Analysis of a Sustainable, Low Energy House in a Hot and Humid Climate
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This study examines the lifetime building e nergy consumption of a typical house in Bangkok, Thailand. The lifetime building energy consumption is composed of three major components: 1) the energy used in building construction (i.e., embodied, transportation and construction energy), 2) the energy used in building operation (annual energy), and 3) the energy used in building demolition (demolition energy). The study used measured environmental and en ergy use data from a case-study house in Thailand. For the construction energy and the energy used in building demolition analyses, reference data from reliable sources both in the U.S. and the U.K. were used. The DOE-2 energy simulation program was used to analyze changes to the annual energy use caused by changing various building materials and/or design configurations. A new energy efficient design was then iteratively chosen that contained reduced levels of embodied energy use and reduced annual energy use. The results from the anal...
A simulation analysis of the environmental effects of energy saving housing
Keio Economic Observatory Review, 1996
Much energy is consu med by household sector, especiallyin heating and cooling. CO2 emission constitutesabout 27% from household consumption per person. Theconstruction related sectors such as cement, transportation,cray and stone have also very high intensities of energy consumptionand CO2 emission. Therefore, for the preservationof the environment, it is important to reduce housingand construcion activities related energy consumption.We show that simple heat insulated housing constructionhas significant reduction effects on energy consumption andCO2 emission. The construction of energy saving housinginduces CO2 emission of 102kg per annum, but it reducesCO2 emission by 689kg. Thus, CO2 reduction amounts to587kg per house. If energy saving construction is appliedto all residential and commercial buildings, about 4% of thetotal CO2 emission can be reduced. Notes Genre
Review of Building Energy Efficiency in the Hot and Humid Climate of Malaysia
Research Journal of Applied Sciences, Engineering and Technology, 2017
Globally, environmental concerns and the progressively increasing high cost of energy have resulted in renewed interest in alternative forms of energy conservation and efficiency. The aim of this study is to describe various energy policies that the government of Malaysia has been adopted in order to ensure long-term reliability and security of energy supply for sustainable social economic development in the country. Improved living standards in developing nations have led to higher demand for energy, which requires nations to review their energy efficient strategies. While a significant portion of the total primary energy is consumed by buildings in developed nations, developing nations like Malaysia are proactively addressing the energy consumption issue. This review describes the standards and energy efficient codes for buildings, introduces low-energy building concepts and provides information on energy consumption of buildings in Malaysia. Alternative energy options like biomass, solar, wind and mini-hydro energy to ensure reliable, sustainable and secure supplies of energy in this country are considered.
Energy Efficiency is an important aspect in the construction of a residential building. Energy Consumption in the building is approximately 8% of electricity and 3.5% of the natural gas. As the increasing in consumption will increase the environmental damage as well as the building interior climatic condition. Heat, Ventilation and Air Conditioning (HVAC) system and lightning system are the major factors that influence energy consumption. In the same way there are climatic issues along with global warming which cannot sustain current economic development activities. So, as to reduce the environmental damage and to make the building energy efficient, certain green techniques must be recommended. By keeping this in view, the paper deals with the case study on residential building and identifying the causes where heavy energy consumption is done and taking them in to consideration and also suggesting green efficiency recommendations for an existing building.
Applied Sciences
The use of energy efficient structures in the local construction industry assists in promoting green building concepts, leading to economical and eco-friendly solutions for self-sustained structures. The main aim of this study was to examine and compare the energy performance of various local buildings. Detailed 3D building models (house, office, and warehouse buildings) were constructed and investigated for their cost and energy savings using building energy simulation tools (green building studio and insight). Moreover, the effects of various building materials for walls, window panels, and roof construction were explored, and a life-cycle cost analysis was performed. It was observed that the effect of the window-to-wall ratio was less severe in term of energy use in office buildings compared to normal houses due to the larger amount of space available for air circulation. Furthermore, the most efficient location for windows was found to be at the middle of the wall in comparison ...
Rapid urbanization in emerging economies, like Vietnam, is commonly realized via the multiplication of stereotype projects consisting of high-rise apartment blocks, terraced, semi-detached and detached houses. For these types of dwellings, in the hot and humid Vietnamese climate, individual air conditioning systems are typically used. This requires a large share of the country energy resources. Until recently comfortable traditional housing has however been built without using such energy intensive cooling. This paper focuses on the energy consumption and thermal comfort in residential buildings if only natural ventilation is used, taking into account the urban environment. Via a parametric simulation several building types are optimized, looking at the urban layout, building orientation and size, window design and internal wind permeability. A two-step procedure is followed for the analysis. Firstly, a simplified model is used to analyse a large range of design alternatives and secondly, dynamic energy and thermal comfort simulations with EnergyPlus are made for a selected number of design options. Results reveal that the average life cycle cost of the optimal cases is 34% lower than the reference cases. The window sizes, building layouts and urban forms are crucial parameters to compensate with orientations at the early design stages. One optimization procedure was developed to make maximum use of passive design measures in large scale housing projects.