Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/221726
Title: A COMPARATIVE STUDY OF WINDOW AIR CONDITIONER AND SPLIT AIR CONDITIONER IN RESIDENTIAL BEDROOMS
Authors: LEE HUIJUN PATRICIA
Keywords: Building
Project and Facilities Management
Cheong Kok Wai David
2010/2011 PFM
Issue Date: 19-May-2011
Citation: LEE HUIJUN PATRICIA (2011-05-19). A COMPARATIVE STUDY OF WINDOW AIR CONDITIONER AND SPLIT AIR CONDITIONER IN RESIDENTIAL BEDROOMS. ScholarBank@NUS Repository.
Abstract: Indoor air quality (IAQ) is one of the main concerns as people spend longer hours in an air-conditioned environment. Limited studies have been attempted to investigate the IAQ and ventilation performance of bedrooms employing window or split air conditioners. This study seeks to assess the air change rates and IAQ status in bedrooms served by window air conditioner with ventilation damper opened (VDO); window air conditioner with ventilation damper closed (VDC); and split air conditioner. Objective measurements were carried out in two separate bedrooms to determine the trend of the nine IAQ parameters and the air change per hour (ACH). Experimental results established that window air conditioners provide better IAQ than split air conditioner in some cases. Average CO2 concentration is kept within acceptable limit in bedroom with window air conditioner but not for split air conditioner. However, readings for PM10 kept fluctuating and both types of air conditioners did not significantly reduce its level to below threshold. Bacteria and fungi counts increased after the use of both types of air conditioners and exceeded the limit in most cases. The trace levels of CO and TVOCs do not pose a problem to the occupants. Tracer gas technique has found out that window air conditioner (VDO) yielded the highest ACH, followed by window air conditioner (VDC), and split air conditioner. Nonetheless, the respective ACH did not meet the ASHRAE requirement. Although a higher ACH i.e. more outdoor air into the bedroom could help to dilute and reduce the indoor contaminants level, the rate of dilution is dependent on many factors as well. Various recommendations have been proposed to improve the performance of the current ventilation damper and the IAQ of bedrooms.
URI: https://scholarbank.nus.edu.sg/handle/10635/221726
Appears in Collections:Bachelor's Theses

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