Résumé/Abstract Detailed energy simulations for buildings in Malaysia have become possible after ... more Résumé/Abstract Detailed energy simulations for buildings in Malaysia have become possible after the recent construction of a Malaysian TRY (Test Reference Year) based on 21 years of hourly weather data from Subang Meteorological Station. The climatic ...
Pusat Tenaga Malaysia's Zero Energy Office (ZEO) Building Technical Review of the Zero Energy... more Pusat Tenaga Malaysia's Zero Energy Office (ZEO) Building Technical Review of the Zero Energy Office building in Malaysia. The building, which has an energy index of 50 kWh/m2/year, reaches a net annual energy of zero through the use of building integrated photovoltaic panels. For reference, ordinary offices in Malaysia consume 200 300 kWh/m2/year. The entire electricity consumption is electric.
Urban houses in Malaysia are too hot for about half the days of the year and Kuala Lumpur has bec... more Urban houses in Malaysia are too hot for about half the days of the year and Kuala Lumpur has become the world’s worse urban heat island on record. However, these problems are not the inevitable consequences of urbanisation and can be corrected and avoided with a sensible application of the technologies available to prevent the thermal mass of houses and roads from absorbing solar radiation. This paper describes a technology known as Cool House to reduce the effects of urban heat island on occupants. ‘Cool House’ technology, developed at Universiti Putra Malaysia can achieve almost passive thermal comfort without airconditioning, even on the hottest days of the year. ‘Honeycomb townships’, a recent architectural invention by one of the authors, is a new method of subdividing land which saves greatly on roads, thereby permitting larger gardens and courtyard parks in front of the houses. Large fruit bearing fruit canopy trees can shade nearly half of the township from direct sunlight....
This study investigated if low air temperature, which is known to improve the perception of air q... more This study investigated if low air temperature, which is known to improve the perception of air quality, also can reduce the intensity of some SBS symptoms. In a low-polluting office, human subjects were exposed to air at two temperatures 23C and 18C both with and without a pollution source present at the low temperature. To maintain overall thermal neutrality, the low air temperature was partly compensated for by individually controlled radiant heating, and partly by allowing subjects to modify clothing insulation. A reduction of the air temperature from 23°C to 18°C suggested an improvement of the perceived air quality, while no systematic effect on symptom intensity was observed. The overall indoor environment was evaluated equally acceptable at both temperatures due to local thermal discomfort at the low air temperature. INDEX TERMS Low air temperature, radiant heating, thermal comfort, perceived air quality, SBS symptoms INTRODUCTION The perception of indoor air quality depends...
A design aid tool for testing and development of daylighting systems was developed. A simplified ... more A design aid tool for testing and development of daylighting systems was developed. A simplified ray tracing software was programmed in Lisp for AutoCad. Only fully specularly reflective, fully transparent and fully absorbant surfaces can be defined in the software. The software is therefore best suited to evaluation of light transmission through specularly reflective daylighting systems. A graphic and numeric display of arrays for each incident angle aids the user in the ray tracing analysis. The results are automatically written to a text file for easy import and analysis in a spreadsheet. Introduction Ray tracing simulations require many computations and my be very time consuming. As the name indictates, ray tracing simulations track the path of each ray as it bounces between the surfaces in the model. For detailed models with millions of ray bounces the computational time can be substantial. Moreover, many ray tracing software like Radiance will not show the ray tracing path eve...
(24/12/2018) Solar Energy for Domestic Hot Water: Case Studies in Sisimiut 1999-2005 Two pioneer ... more (24/12/2018) Solar Energy for Domestic Hot Water: Case Studies in Sisimiut 1999-2005 Two pioneer solar domestic hot water systems were installed at Byggeog Anlægsskolen in Sisimiut in 1999 and 2000. Detailed measurements of energy flows and solar radiation incl. snow reflectance has been undertaken for both plants. Since August 2004 data logging of the measurements was made available online on the website www.arcticsolar.com. Measurements show that solar plant 1 and 2 cover 22% and 23%, respectively, of the energy spent for domestic hot water heating. This paper summarises the findings from the past 5 years.
2.1 VENTILATIONSTAB................................................................................. more 2.1 VENTILATIONSTAB...................................................................................... 4 2.2 VENTILATION MED VARMEGENVINDING...................................................... 6 2.3 FORSØG MED MODSTRØMSVEKSLER............................................. ... ... 3.1 RENOVERING AF INI ...
ABSTRACT Greenland is a relatively small community with limited natural resources, which results ... more ABSTRACT Greenland is a relatively small community with limited natural resources, which results in the necessity to import all supplies, including a big share of the energy. Because of this, it is important to decrease the energy consumption. This can be done by developing new construction technology with larger focus on energy efficiency. Therefore a low-energy house, located in Sisimiut, has been constructed. The low-energy house will be a forerunner for the development of new building element designs and technologies in Greenland. In the forthcoming years, the house will also be a base for scientific projects which will evaluate the design of the low-energy house including an assessment of the effect of the highly insulated building envelope, advanced windows and a ventilation system with heat recovery, all of which cuts the energy consumption of the building to half of what will be the requirement in the new Greenlandic building regulations.
The field of office daylighting is vital for both energy efficiency practice and occupants’ visua... more The field of office daylighting is vital for both energy efficiency practice and occupants’ visual comfort. With the emergence of green building emergence in Malaysia, building designers are exploring avenues for energy efficiency design; one common strategy is daylighting. The majority literature reviews on daylighting are skewed towards temperate or developed countries, where sky luminous condition is different from that of the Tropics. Conventional daylighting system designs redirect daylight from the envelope or atrium openings i.e. daylight shelves. Presumed to be the pioneer daylight trough in the Tropics, this paper presents the simulated and in-situ lighting level measurements prior to occupancy. This case study presents an as-built daylight trough design which is able to daylight the office space as deep as 6 meters sufficiently. It achieves a lighting power density 1.90W/m2 and saves 39.2% of lighting energy over conventional office lighting energy. Discussed further is th...
Résumé/Abstract Detailed energy simulations for buildings in Malaysia have become possible after ... more Résumé/Abstract Detailed energy simulations for buildings in Malaysia have become possible after the recent construction of a Malaysian TRY (Test Reference Year) based on 21 years of hourly weather data from Subang Meteorological Station. The climatic ...
Pusat Tenaga Malaysia's Zero Energy Office (ZEO) Building Technical Review of the Zero Energy... more Pusat Tenaga Malaysia's Zero Energy Office (ZEO) Building Technical Review of the Zero Energy Office building in Malaysia. The building, which has an energy index of 50 kWh/m2/year, reaches a net annual energy of zero through the use of building integrated photovoltaic panels. For reference, ordinary offices in Malaysia consume 200 300 kWh/m2/year. The entire electricity consumption is electric.
Urban houses in Malaysia are too hot for about half the days of the year and Kuala Lumpur has bec... more Urban houses in Malaysia are too hot for about half the days of the year and Kuala Lumpur has become the world’s worse urban heat island on record. However, these problems are not the inevitable consequences of urbanisation and can be corrected and avoided with a sensible application of the technologies available to prevent the thermal mass of houses and roads from absorbing solar radiation. This paper describes a technology known as Cool House to reduce the effects of urban heat island on occupants. ‘Cool House’ technology, developed at Universiti Putra Malaysia can achieve almost passive thermal comfort without airconditioning, even on the hottest days of the year. ‘Honeycomb townships’, a recent architectural invention by one of the authors, is a new method of subdividing land which saves greatly on roads, thereby permitting larger gardens and courtyard parks in front of the houses. Large fruit bearing fruit canopy trees can shade nearly half of the township from direct sunlight....
This study investigated if low air temperature, which is known to improve the perception of air q... more This study investigated if low air temperature, which is known to improve the perception of air quality, also can reduce the intensity of some SBS symptoms. In a low-polluting office, human subjects were exposed to air at two temperatures 23C and 18C both with and without a pollution source present at the low temperature. To maintain overall thermal neutrality, the low air temperature was partly compensated for by individually controlled radiant heating, and partly by allowing subjects to modify clothing insulation. A reduction of the air temperature from 23°C to 18°C suggested an improvement of the perceived air quality, while no systematic effect on symptom intensity was observed. The overall indoor environment was evaluated equally acceptable at both temperatures due to local thermal discomfort at the low air temperature. INDEX TERMS Low air temperature, radiant heating, thermal comfort, perceived air quality, SBS symptoms INTRODUCTION The perception of indoor air quality depends...
A design aid tool for testing and development of daylighting systems was developed. A simplified ... more A design aid tool for testing and development of daylighting systems was developed. A simplified ray tracing software was programmed in Lisp for AutoCad. Only fully specularly reflective, fully transparent and fully absorbant surfaces can be defined in the software. The software is therefore best suited to evaluation of light transmission through specularly reflective daylighting systems. A graphic and numeric display of arrays for each incident angle aids the user in the ray tracing analysis. The results are automatically written to a text file for easy import and analysis in a spreadsheet. Introduction Ray tracing simulations require many computations and my be very time consuming. As the name indictates, ray tracing simulations track the path of each ray as it bounces between the surfaces in the model. For detailed models with millions of ray bounces the computational time can be substantial. Moreover, many ray tracing software like Radiance will not show the ray tracing path eve...
(24/12/2018) Solar Energy for Domestic Hot Water: Case Studies in Sisimiut 1999-2005 Two pioneer ... more (24/12/2018) Solar Energy for Domestic Hot Water: Case Studies in Sisimiut 1999-2005 Two pioneer solar domestic hot water systems were installed at Byggeog Anlægsskolen in Sisimiut in 1999 and 2000. Detailed measurements of energy flows and solar radiation incl. snow reflectance has been undertaken for both plants. Since August 2004 data logging of the measurements was made available online on the website www.arcticsolar.com. Measurements show that solar plant 1 and 2 cover 22% and 23%, respectively, of the energy spent for domestic hot water heating. This paper summarises the findings from the past 5 years.
2.1 VENTILATIONSTAB................................................................................. more 2.1 VENTILATIONSTAB...................................................................................... 4 2.2 VENTILATION MED VARMEGENVINDING...................................................... 6 2.3 FORSØG MED MODSTRØMSVEKSLER............................................. ... ... 3.1 RENOVERING AF INI ...
ABSTRACT Greenland is a relatively small community with limited natural resources, which results ... more ABSTRACT Greenland is a relatively small community with limited natural resources, which results in the necessity to import all supplies, including a big share of the energy. Because of this, it is important to decrease the energy consumption. This can be done by developing new construction technology with larger focus on energy efficiency. Therefore a low-energy house, located in Sisimiut, has been constructed. The low-energy house will be a forerunner for the development of new building element designs and technologies in Greenland. In the forthcoming years, the house will also be a base for scientific projects which will evaluate the design of the low-energy house including an assessment of the effect of the highly insulated building envelope, advanced windows and a ventilation system with heat recovery, all of which cuts the energy consumption of the building to half of what will be the requirement in the new Greenlandic building regulations.
The field of office daylighting is vital for both energy efficiency practice and occupants’ visua... more The field of office daylighting is vital for both energy efficiency practice and occupants’ visual comfort. With the emergence of green building emergence in Malaysia, building designers are exploring avenues for energy efficiency design; one common strategy is daylighting. The majority literature reviews on daylighting are skewed towards temperate or developed countries, where sky luminous condition is different from that of the Tropics. Conventional daylighting system designs redirect daylight from the envelope or atrium openings i.e. daylight shelves. Presumed to be the pioneer daylight trough in the Tropics, this paper presents the simulated and in-situ lighting level measurements prior to occupancy. This case study presents an as-built daylight trough design which is able to daylight the office space as deep as 6 meters sufficiently. It achieves a lighting power density 1.90W/m2 and saves 39.2% of lighting energy over conventional office lighting energy. Discussed further is th...
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