Natural Ventilation for Energy Efficient Office Buildings: A Comparative Analysis on Three Buildings In Kuala Lumpur

Abstract

Refer to the Malaysian Standard code of practice on Energy Efficiency and Use of Renewable Energy for Nonresidential Building (MS1525:2007), it was stated in the guideline for natural ventilation as said; "Natural ventilation is the use of fresh air of sufficient volume and air change to ventilate enclosed spaces without active temperature controls or mechanical means. Fresh air is required in buildings to alleviate odours and improved indoor environmental quality. Provisions for naturally ventilated lobby areas, corridors, lift cores, staircases should be encouraged. This could aid compliance with the requirements from the fire authorities for smoke venting of the spaces in the event of the fire. In some of these cases, spill air from adjacent spaces is sufficient for air change to ventilate the space and provide thermal comfort with reducing energy. Natural ventilation strategies rely on the movement of air through space to equalise pressure. One of its purposes is to encourage the design, construction, operation, and maintenance of new and existing buildings in a manner that reduces the use of energy without constraining creativity in design, building function and the comfort and the occupants, and appropriately dealing with cost consideration (MS1525, 2007). 2. Literature Review Ventilation has defined as the exchange of air [1]. To create a comfortable environment inside the office building, there is a need to provide good ventilation. Without the exchange of air, both the temperature and the humidity of room will increase above the outdoor value, due to the heat and moisture output of human bodies and of the various human Abstract: Natural ventilation is one of the criteria of passive design strategies to reduce the usage of active ventilation especially an airconditioning system which will involve a hugeamount of operation cost. The aim of this study was to identify and analyse the criteria of natural ventilation in the selected office buildings. The analysis had been made based on the architectural and passive design component provided in MS 1525:2007 for the office building. This case study is important in helping to understand the relationship between natural ventilation, energy efficiency and cost effectiveness.

The Potential of Atrium Design to Maximize the Passive Cooling Effect for Low-Rise Public Buildings in Malaysia

“…The site observation and field measurement were conducted to identify and evaluate the performance of atrium's passive cooling for low-rise public buildings in Malaysia. In order to determine the passive design techniques that have been used for the buildings, a comparative study was carried out based on the secondary data gathered as well as the observation of the stack ventilation suggested by MS1525:2007 [10]. The site measurement was concentrated on six numbers of localised temperature and air flow pressure differential positioned inside the atrium [11].…”

A review of hybrid ventilation on humid tropics climate

“…The use of a displacement ventilation (DV) system is appropriate with the addition of an opening in the upper window to release warm air into the top ceiling. The warm air moves upward and is discharged through the upper window and the overhanging roof with a louver is designed to utilize the NV [50]. The air distribution strategy in the AC system by using displacement ventilation (DV) can reduce the cooling load, such as by entering conditioned outdoor air at a low speed and the buoyancy principle or by using natural exhaust with an AC supply with the DV principle which can reduce cooling load.…”