Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/222931
Title: FIELD STUDY ON INDOOR AIR QUALITY AND ENERGY USAGE IN AN OFFICE THAT ADOPTS SCTF SYSTEM
Authors: ANG WEN JIE EUGENE
Keywords: Building
PFM
Project and Facilities Management
Chandra Sekhar
2013/2014 PFM
Issue Date: 17-Jan-2014
Citation: ANG WEN JIE EUGENE (2014-01-17). FIELD STUDY ON INDOOR AIR QUALITY AND ENERGY USAGE IN AN OFFICE THAT ADOPTS SCTF SYSTEM. ScholarBank@NUS Repository.
Abstract: The Single Coil Twin Fan (SCTF) system has been selected as the primary air-conditioning system for the Zero Energy Building (ZEB) in Singapore. It has been installed and commissioned in BCA Academy since 2009. The main objectives of using this system are to obtain energy efficiency and superior indoor environmental conditions. Hence, the purpose of this study is to find out if this system is able to meet the above stated objectives. An Indoor Air Quality (IAQ) audit was carried over 2 weeks at one of the office at BCA. The cool air is supplied by the SCTF system and the Ceiling Supply Mixing Ventilation System to distribute them. Both subjective and objective measurements are conducted. Objective measurements are further divided into continuous and spot measurement to achieve more accurate results. The results of the subjective measurement are used to support the findings of the objective measurements to enhance the credibility of the study. The four parameters, thermal comfort, chemical, particulate and biological concentration levels are all used to evaluate the IAQ in the office. The ventilation of the office was also studied by using the tracer gas method. Moreover, the energy consumption of the system was analyzed to evaluate the system’s energy efficiency. The findings from the measurements show that generally the IAQ in the office is within the acceptable range. It can be further improve in term of thermal comfort at some areas of the office, which was measured to be of higher temperature. The ventilation of the office is also within the acceptable range. The energy analysis shows that the energy used is consistent over the days except in the morning when more cooling isf needed to remove the heat gained over the evening. From the findings, it is recommended to reduce the airflow in other diffusers so that more cool air will flow to the hotter area in the office. A more drastic solution is to redesign the ACMV system to increase the cooling capacity. The BCA facilities management team should continue with the good housekeeping of the system, which ensures that the system produce good IAQ and remain energy efficient.
URI: https://scholarbank.nus.edu.sg/handle/10635/222931
Appears in Collections:Bachelor's Theses

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