The Experts below are selected from a list of 159 Experts worldwide ranked by ideXlab platform

Leif Gustavsson - One of the best experts on this subject based on the ideXlab platform.

  • Primary Energy implications of different wall insulation materials for buildings in a cold climate
    Energy Procedia, 2014
    Co-Authors: Uniben Yao Ayikoe Tettey, Ambrose Dodoo, Leif Gustavsson
    Abstract:

    In this study, we investigate the influence of different external wall insulation systems on the primary Energy use of a case study building in southern Sweden. We vary the insulation material of the external walls from rock wool to glass wool or expanded polystyrene (EPS) to achieve different Energy-Efficiency Standards of the building. We apply appropriate thicknesses of the different insulation materials to achieve similar thermal transmittance (U-value) of the external walls under the different Energy-Efficiency Standards. The different options are based on the same architectural design. We calculate and compare the primary Energy for production of the insulation materials and for operation of the buildings. Rock wool gives the lowest primary Energy for production, followed by glass wool and EPS for each Energy Efficiency Standard, although the difference between rock wool and glass wool is small.

  • Building Energy-Efficiency Standards in a life cycle primary Energy perspective
    Energy and Buildings, 2011
    Co-Authors: Ambrose Dodoo, Leif Gustavsson, Roger Sathre
    Abstract:

    In this study we analyze the life cycle primary Energy use of a wood-frame apartment building designed to meet the current Swedish building code, the Swedish building code of 1994 or the passive house Standard, and heated with district heat or electric resistance heating. The analysis includes the primary Energy use during the production, operation and end-of-life phases. We find that an electric heated building built to the current building code has greater life cycle primary Energy use relative to a district heated building, although the Standard for electric heating is more stringent. Also, the primary Energy use for an electric heated building constructed to meet the passive house Standard is substantially higher than for a district heated building built to the Swedish building code of 1994. The primary Energy for material production constitutes 5% of the primary Energy for production and space heating and ventilation of an electric heated building built to meet the 1994 code. The share of production Energy increases as the Energy-Efficiency Standard of the building improves and when efficient Energy supply is used, and reaches 30% for a district heated passive house. This study shows the significance of a life cycle primary Energy perspective and the choice of heating system in reducing Energy use in the built environment.

  • Building Energy-Efficiency Standards in a life cycle primary Energy perspective
    Energy and Buildings, 2011
    Co-Authors: Ambrose Dodoo, Leif Gustavsson, Roger Sathre
    Abstract:

    In this study we analyze the life cycle primary Energy use of a wood-frame apartment building designed to meet the current Swedish building code, the Swedish building code of 1994 or the passive house Standard, and heated with district heat or electric resistance heating. The analysis includes the primary Energy use during the production, operation and end-of-life phases. We find that an electric heated building built to the current building code has greater life cycle primary Energy use relative to a district heated building, although the Standard for electric heating is more stringent. Also, the primary Energy use for an electric heated building constructed to meet the passive house Standard is substantially higher than for a district heated building built to the Swedish building code of 1994. The primary Energy for material production constitutes 5% of the primary Energy for production and space heating and ventilation of an electric heated building built to meet the 1994 code. The share of production Energy increases as the Energy-Efficiency Standard of the building improves and when efficient Energy supply is used, and reaches 30% for a district heated passive house. This study shows the significance of a life cycle primary Energy perspective and the choice of heating system in reducing Energy use in the built environment. ?? 2011 Elsevier B.V. All rights reserved.

Ambrose Dodoo - One of the best experts on this subject based on the ideXlab platform.

  • Primary Energy implications of different wall insulation materials for buildings in a cold climate
    Energy Procedia, 2014
    Co-Authors: Uniben Yao Ayikoe Tettey, Ambrose Dodoo, Leif Gustavsson
    Abstract:

    In this study, we investigate the influence of different external wall insulation systems on the primary Energy use of a case study building in southern Sweden. We vary the insulation material of the external walls from rock wool to glass wool or expanded polystyrene (EPS) to achieve different Energy-Efficiency Standards of the building. We apply appropriate thicknesses of the different insulation materials to achieve similar thermal transmittance (U-value) of the external walls under the different Energy-Efficiency Standards. The different options are based on the same architectural design. We calculate and compare the primary Energy for production of the insulation materials and for operation of the buildings. Rock wool gives the lowest primary Energy for production, followed by glass wool and EPS for each Energy Efficiency Standard, although the difference between rock wool and glass wool is small.

  • Building Energy-Efficiency Standards in a life cycle primary Energy perspective
    Energy and Buildings, 2011
    Co-Authors: Ambrose Dodoo, Leif Gustavsson, Roger Sathre
    Abstract:

    In this study we analyze the life cycle primary Energy use of a wood-frame apartment building designed to meet the current Swedish building code, the Swedish building code of 1994 or the passive house Standard, and heated with district heat or electric resistance heating. The analysis includes the primary Energy use during the production, operation and end-of-life phases. We find that an electric heated building built to the current building code has greater life cycle primary Energy use relative to a district heated building, although the Standard for electric heating is more stringent. Also, the primary Energy use for an electric heated building constructed to meet the passive house Standard is substantially higher than for a district heated building built to the Swedish building code of 1994. The primary Energy for material production constitutes 5% of the primary Energy for production and space heating and ventilation of an electric heated building built to meet the 1994 code. The share of production Energy increases as the Energy-Efficiency Standard of the building improves and when efficient Energy supply is used, and reaches 30% for a district heated passive house. This study shows the significance of a life cycle primary Energy perspective and the choice of heating system in reducing Energy use in the built environment.

  • Building Energy-Efficiency Standards in a life cycle primary Energy perspective
    Energy and Buildings, 2011
    Co-Authors: Ambrose Dodoo, Leif Gustavsson, Roger Sathre
    Abstract:

    In this study we analyze the life cycle primary Energy use of a wood-frame apartment building designed to meet the current Swedish building code, the Swedish building code of 1994 or the passive house Standard, and heated with district heat or electric resistance heating. The analysis includes the primary Energy use during the production, operation and end-of-life phases. We find that an electric heated building built to the current building code has greater life cycle primary Energy use relative to a district heated building, although the Standard for electric heating is more stringent. Also, the primary Energy use for an electric heated building constructed to meet the passive house Standard is substantially higher than for a district heated building built to the Swedish building code of 1994. The primary Energy for material production constitutes 5% of the primary Energy for production and space heating and ventilation of an electric heated building built to meet the 1994 code. The share of production Energy increases as the Energy-Efficiency Standard of the building improves and when efficient Energy supply is used, and reaches 30% for a district heated passive house. This study shows the significance of a life cycle primary Energy perspective and the choice of heating system in reducing Energy use in the built environment. ?? 2011 Elsevier B.V. All rights reserved.

T M I Mahlia - One of the best experts on this subject based on the ideXlab platform.

  • Impacts of Energy Efficiency Standard on motor Energy savings and emission reductions
    Clean Technologies and Environmental Policy, 2011
    Co-Authors: R Saidur, T M I Mahlia
    Abstract:

    Electrical motors use about 30–80% of total industrial Energy for some selected countries around the world. Experiences from other countries show that government intervention in the form of regulations such as mandatory and voluntary approaches can save huge amount of Energy along with the reduction of emissions associated with Energy savings. In this paper, use of high efficient motors to replace Standard motors to save Energy have been quantified and presented. Emission reductions associated with the Energy savings have been estimated and presented as well. Based on estimation, it has been found that 15,111, 6507 and 4295 MWh of Energy can be saved for 50, 75 and 100% motor loadings, respectively, for using high efficient motors. These savings will correspond to US$ 967,074, US$ 416,461 and US$ 274,892 savings for 50, 75 and 100 motor loadings, respectively, by replacing Standard motors with high Efficiency motors. It was also found that 7,562,070 kg of CO_2, 45,266 kg of SO_2, 21,326 kg of NO_ x and 4,599 kg of CO could be avoided by using Energy efficient motors for 50% load. It was also found that payback period for implementing high efficient motors are in the range from 1.22 to 6.05, which is economically very viable for motor loadings of 50%.

  • electricity savings from implementation of minimum Energy Efficiency Standard for tvs in malaysia
    Energy and Buildings, 2005
    Co-Authors: M Varman, H H Masjuki, T M I Mahlia
    Abstract:

    The popularization of 24 h pay-TV, interactive video games, web-TV, VCD and DVD in Malaysia are poised to have a large impact on overall TV electricity consumption in the country. With the increasing of overall TV Energy consumption, Energy Efficiency Standards are one of highly effective policies for decreasing electricity consumption in the residential sector. Energy Efficiency Standards are also capable of reducing consumer's electricity bill and contribute towards positive environmental impacts. This paper attempts to predict the amount of Energy that can be saved in the residential sector by implementing minimum Energy Efficiency Standard for television sets in Malaysia. Over the past 30 years, television ownership in Malaysian residents has increased from 186,036 units in 1970 to 2,741,640 units in 1991. This figure is expected to reach 6,201,316 units in the year 2010. Hence, Efficiency improvement for this appliance will have a significant impact on the future of electricity consumption in this country.

  • Cost-benefit analysis of implementing minimum Energy Efficiency Standards for household refrigerator-freezers in Malaysia
    Energy Policy, 2004
    Co-Authors: T M I Mahlia, H H Masjuki, R Saidur, Muhammad Afifi Amalina
    Abstract:

    Abstract The ownership of household electrical appliances especially refrigerator-freezer has increased rapidly in Malaysia. Almost every household in this country has a refrigerator-freezer. To reduce Energy consumption in this sector the refrigerator is one of the top priorities of the Energy Efficiency program for household appliances. Malaysian authority is considering implementing minimum Energy Efficiency Standards for refrigerator-freezer sometime in the coming year. This paper attempts to analyze cost–benefit of implementing minimum Energy Efficiency Standards for household refrigerator-freezers in Malaysia. The calculations were made based on growth of ownership data for refrigerators in Malaysian households. The number of refrigerator-freezer has increased from 175,842 units in 1970 to 4,196,486 in 2000 and it will be about 11,293,043 in the year of 2020. Meanwhile it has accounted for about 26.3% of electricity consumption in a single household. Therefore, Efficiency improvement of this appliance will give a significant impact in the future of electricity consumption in this country. Furthermore, it has been found that implementing an Energy Efficiency Standard for household refrigerator-freezers is economically justified.

  • projected electricity savings from implementing minimum Energy Efficiency Standard for household refrigerators in malaysia
    Energy, 2003
    Co-Authors: T M I Mahlia, H H Masjuki, R Saidur, I A Choudhury, A R Noorleha
    Abstract:

    The Malaysian economy has grown rapidly in the last two decades. This growth has increased the ownership of household electrical appliances, especially refrigerator-freezers. Almost every house in Malaysia owns a refrigerator-freezer. The Malaysia Energy Center considered implementing a minimum Energy Efficiency Standard for household refrigerator-freezers sometime in the coming year. This paper attempts to predict the amount of Energy savings in the residential sector by implementing a minimum Energy Efficiency Standard for household refrigerator-freezers. The calculations are based on the growth of refrigerator-freezer ownership data in Malaysian households. By implementing the programs in 2004, about 8722 GWh will be saved in the year 2013. Therefore, Efficiency improvement of this appliance will provide a significant impact in future electricity consumption in Malaysia.

  • developing Energy Efficiency Standard and its impact on refrigerator freezers in malaysia
    2002
    Co-Authors: R Saidur, T M I Mahlia, H H Masjuki, A R Nasrudin, M R Tamjis
    Abstract:

    Refrigerator-freezers are one of the major Energy users in the residential sector of Malaysia. In line with rapid economic growth, the ownership of household refrigerator-freezers increased rapidly for the last several years. There has been a tremendous increase in the use of household refrigerator-freezers (878000 units) from 1990 to 1999 and by the year 2020, it will be about 5624000 units. So, there is a huge saving potential by introducing cost-effective Energy policy like Energy Efficiency Standards. Energy Efficiency Standards are cost-effective approaches that can help to improve the Efficiency of these appliances. In the present study, six household refrigerator-freezers of different capacities and models have been tested in the Energy conservation laboratory to investigate the Energy consumption behavior of these appliances. The test has been carried out according to ISO refrigerator-freezers test specifications. Using the experimental data of ISO test conditions, a baseline Standard has been developed by the statistical method. From the baseline Standard, 5 and 10 Standards as a function of adjusted volume have been developed. Impacts of Energy Efficiency Standards have been calculated and presented in this paper as well.

Roger Sathre - One of the best experts on this subject based on the ideXlab platform.

  • Building Energy-Efficiency Standards in a life cycle primary Energy perspective
    Energy and Buildings, 2011
    Co-Authors: Ambrose Dodoo, Leif Gustavsson, Roger Sathre
    Abstract:

    In this study we analyze the life cycle primary Energy use of a wood-frame apartment building designed to meet the current Swedish building code, the Swedish building code of 1994 or the passive house Standard, and heated with district heat or electric resistance heating. The analysis includes the primary Energy use during the production, operation and end-of-life phases. We find that an electric heated building built to the current building code has greater life cycle primary Energy use relative to a district heated building, although the Standard for electric heating is more stringent. Also, the primary Energy use for an electric heated building constructed to meet the passive house Standard is substantially higher than for a district heated building built to the Swedish building code of 1994. The primary Energy for material production constitutes 5% of the primary Energy for production and space heating and ventilation of an electric heated building built to meet the 1994 code. The share of production Energy increases as the Energy-Efficiency Standard of the building improves and when efficient Energy supply is used, and reaches 30% for a district heated passive house. This study shows the significance of a life cycle primary Energy perspective and the choice of heating system in reducing Energy use in the built environment.

  • Building Energy-Efficiency Standards in a life cycle primary Energy perspective
    Energy and Buildings, 2011
    Co-Authors: Ambrose Dodoo, Leif Gustavsson, Roger Sathre
    Abstract:

    In this study we analyze the life cycle primary Energy use of a wood-frame apartment building designed to meet the current Swedish building code, the Swedish building code of 1994 or the passive house Standard, and heated with district heat or electric resistance heating. The analysis includes the primary Energy use during the production, operation and end-of-life phases. We find that an electric heated building built to the current building code has greater life cycle primary Energy use relative to a district heated building, although the Standard for electric heating is more stringent. Also, the primary Energy use for an electric heated building constructed to meet the passive house Standard is substantially higher than for a district heated building built to the Swedish building code of 1994. The primary Energy for material production constitutes 5% of the primary Energy for production and space heating and ventilation of an electric heated building built to meet the 1994 code. The share of production Energy increases as the Energy-Efficiency Standard of the building improves and when efficient Energy supply is used, and reaches 30% for a district heated passive house. This study shows the significance of a life cycle primary Energy perspective and the choice of heating system in reducing Energy use in the built environment. ?? 2011 Elsevier B.V. All rights reserved.

R Saidur - One of the best experts on this subject based on the ideXlab platform.

  • Impacts of Energy Efficiency Standard on motor Energy savings and emission reductions
    Clean Technologies and Environmental Policy, 2011
    Co-Authors: R Saidur, T M I Mahlia
    Abstract:

    Electrical motors use about 30–80% of total industrial Energy for some selected countries around the world. Experiences from other countries show that government intervention in the form of regulations such as mandatory and voluntary approaches can save huge amount of Energy along with the reduction of emissions associated with Energy savings. In this paper, use of high efficient motors to replace Standard motors to save Energy have been quantified and presented. Emission reductions associated with the Energy savings have been estimated and presented as well. Based on estimation, it has been found that 15,111, 6507 and 4295 MWh of Energy can be saved for 50, 75 and 100% motor loadings, respectively, for using high efficient motors. These savings will correspond to US$ 967,074, US$ 416,461 and US$ 274,892 savings for 50, 75 and 100 motor loadings, respectively, by replacing Standard motors with high Efficiency motors. It was also found that 7,562,070 kg of CO_2, 45,266 kg of SO_2, 21,326 kg of NO_ x and 4,599 kg of CO could be avoided by using Energy efficient motors for 50% load. It was also found that payback period for implementing high efficient motors are in the range from 1.22 to 6.05, which is economically very viable for motor loadings of 50%.

  • Cost-benefit analysis of implementing minimum Energy Efficiency Standards for household refrigerator-freezers in Malaysia
    Energy Policy, 2004
    Co-Authors: T M I Mahlia, H H Masjuki, R Saidur, Muhammad Afifi Amalina
    Abstract:

    Abstract The ownership of household electrical appliances especially refrigerator-freezer has increased rapidly in Malaysia. Almost every household in this country has a refrigerator-freezer. To reduce Energy consumption in this sector the refrigerator is one of the top priorities of the Energy Efficiency program for household appliances. Malaysian authority is considering implementing minimum Energy Efficiency Standards for refrigerator-freezer sometime in the coming year. This paper attempts to analyze cost–benefit of implementing minimum Energy Efficiency Standards for household refrigerator-freezers in Malaysia. The calculations were made based on growth of ownership data for refrigerators in Malaysian households. The number of refrigerator-freezer has increased from 175,842 units in 1970 to 4,196,486 in 2000 and it will be about 11,293,043 in the year of 2020. Meanwhile it has accounted for about 26.3% of electricity consumption in a single household. Therefore, Efficiency improvement of this appliance will give a significant impact in the future of electricity consumption in this country. Furthermore, it has been found that implementing an Energy Efficiency Standard for household refrigerator-freezers is economically justified.

  • projected electricity savings from implementing minimum Energy Efficiency Standard for household refrigerators in malaysia
    Energy, 2003
    Co-Authors: T M I Mahlia, H H Masjuki, R Saidur, I A Choudhury, A R Noorleha
    Abstract:

    The Malaysian economy has grown rapidly in the last two decades. This growth has increased the ownership of household electrical appliances, especially refrigerator-freezers. Almost every house in Malaysia owns a refrigerator-freezer. The Malaysia Energy Center considered implementing a minimum Energy Efficiency Standard for household refrigerator-freezers sometime in the coming year. This paper attempts to predict the amount of Energy savings in the residential sector by implementing a minimum Energy Efficiency Standard for household refrigerator-freezers. The calculations are based on the growth of refrigerator-freezer ownership data in Malaysian households. By implementing the programs in 2004, about 8722 GWh will be saved in the year 2013. Therefore, Efficiency improvement of this appliance will provide a significant impact in future electricity consumption in Malaysia.

  • developing Energy Efficiency Standard and its impact on refrigerator freezers in malaysia
    2002
    Co-Authors: R Saidur, T M I Mahlia, H H Masjuki, A R Nasrudin, M R Tamjis
    Abstract:

    Refrigerator-freezers are one of the major Energy users in the residential sector of Malaysia. In line with rapid economic growth, the ownership of household refrigerator-freezers increased rapidly for the last several years. There has been a tremendous increase in the use of household refrigerator-freezers (878000 units) from 1990 to 1999 and by the year 2020, it will be about 5624000 units. So, there is a huge saving potential by introducing cost-effective Energy policy like Energy Efficiency Standards. Energy Efficiency Standards are cost-effective approaches that can help to improve the Efficiency of these appliances. In the present study, six household refrigerator-freezers of different capacities and models have been tested in the Energy conservation laboratory to investigate the Energy consumption behavior of these appliances. The test has been carried out according to ISO refrigerator-freezers test specifications. Using the experimental data of ISO test conditions, a baseline Standard has been developed by the statistical method. From the baseline Standard, 5 and 10 Standards as a function of adjusted volume have been developed. Impacts of Energy Efficiency Standards have been calculated and presented in this paper as well.

  • potential co2 reduction by implementing Energy Efficiency Standard for room air conditioner in malaysia
    Energy Conversion and Management, 2001
    Co-Authors: T M I Mahlia, H H Masjuki, I A Choudhury, R Saidur
    Abstract:

    This study attempts to predict the environmental impact of implementing an Energy Efficiency Standard for room air conditioners in Malaysia. The ownership of room air conditioners has increased tremendously in this country. At present, there are about 528,792 room air conditioners in Malaysian households. In the year 2020, it will be about 1,511,276. The potential carbon dioxide reduction is based on the predicted electricity savings from implementing a minimum Energy Efficiency Standard for room air conditioners. The electricity savings are calculated based on the predicted electricity consumption by a single air conditioner in the Malaysian household. The replacement of less efficient units of this appliance is reflected in reduced electricity consumption and emissions from power plants. The Energy Efficiency provisions of this regulation and agreement provide targets to save money, Energy and, most importantly, to protect the environment.