A study of perceived air quality and sick building syndrome in a field environment chamber served by displacement ventilation system in the tropics

2006 ◽  
Vol 41 (11) ◽  
pp. 1530-1539 ◽  
Author(s):  
K.W.D. Cheong ◽  
W.J. Yu ◽  
K.W. Tham ◽  
S.C. Sekhar ◽  
R. Kosonen
Keyword(s):  
Air Quality ◽  
Ventilation System ◽  
Sick Building Syndrome ◽  
Displacement Ventilation ◽  
Field Environment ◽  
Sick Building ◽  
Environment Chamber ◽  
The Tropics

Computational Modeling of Particulate Pollutant Transport in a Ventilated Room in the Presence of Two Heated Breathing and Rotating Manikins

2017 ◽  
Author(s):  
Seyed Ali Keshavarz ◽  
Mazyar Salmanzadeh ◽  
Goodarz Ahmadi
Keyword(s):  
Air Quality ◽  
Computational Modeling ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Rotational Motion ◽  
Indoor Environment ◽  
Ventilation System ◽  
Thermal Plume ◽  
Displacement Ventilation ◽  
Simulation Results

Recently, attention has been given to indoor air quality due to its serious health concerns. Clearly the dispersion of pollutant is directly affected by the airflow patterns. The airflow in indoor environment is the results of a combination of several factors. In the present study, the effects of thermal plume and respiration on the indoor air quality in a ventilated cubicle were investigated using an unsteady computational modeling approach. The person-to-person contaminant transports in a ventilated room with mixing and displacement ventilation systems were studied. The effects of rotational motion of the heated manikins were also analyzed. Simulation results showed that in the cases which rotational motion was included, the human thermal plume and associated particle transport were significantly distorted. The distortion was more noticeable for the displacement ventilation system. Also it was found that the displacement ventilation system lowered the risk of person-to-person transmission in an office space in comparison with the mixing ventilation system. On the other hand the mixing system was shown to be more effective compared to the displacement ventilation in removing the particles and pollutant that entered the room through the inlet air diffuser.

Beyond Air Quality—Factors That Affect Prevalence Estimates of Sick Building Syndrome

AIHAJ ◽  
1995 ◽  
Vol 56 (11) ◽  
pp. 1141-1146 ◽  
Author(s):  
Mark A. Mikatavage ◽  
Vernon E. Rose ◽  
Ellen Funkhouser ◽  
R. Kent Oestenstad ◽  
Kenneth Dillon ◽  
...  
Keyword(s):  
Air Quality ◽  
Sick Building Syndrome ◽  
Quality Factors ◽  
Prevalence Estimates ◽  
Sick Building

scholarly journals INDOOR AIR QUALITY ASSESSMENT FOR A MULTISTOREY UNIVERSITY OFFICE BUILDING IN MALAYSIA

2019 ◽  
Vol 14 (4) ◽  
pp. 93-109
Author(s):  
Abd Halid Abdullah ◽  
Yee Yong Lee ◽  
Eeydzah Aminudin ◽  
Yeong Huei Lee
Keyword(s):  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Work Performance ◽  
Sick Building Syndrome ◽  
Office Building ◽  
Physical Parameters ◽  
Contributing Factors ◽  
Air Quality Assessment ◽  
Sick Building

The indoor air quality (IAQ) in office buildings should be assessed for public health concerns as it relates to work performance and productivity. Therefore, this paper aims to assess the IAQ in a university office building. From this investigation, the level of contaminated indoor air is examined, the significant causes and contributing factors of contaminated indoor air are determined and a recommendation to improve the existing condition has been proposed. The physical parameters measured include air temperature, air velocity, relative humidity, and concentrations of carbon dioxide (CO2), carbon monoxide (CO), sulphur dioxide (SO2), and also air particles. It was found that the number of air particles of 0.5 μm in diameter is about 197,748 particles/m3, while air particles of 5.0 μm in diameter is around 534 particles/m3. The collected data were then compared with a questionnaire and IAQ standards. In conclusion, the indoor air quality within the multi-storey central office building of Universiti Tun Hussein Onn Malaysia (UTHM) is acceptable and suitable for occupation even though there were countable symptoms of Sick Building Syndrome (SBS) among its occupants.

Modeling the Applicability of a Displacement Ventilation System

2021 ◽  
Vol 11 (1) ◽  
pp. 63-89
Author(s):  
Edgar C. Ambos ◽  
Evan Neil V. Ambos ◽  
Lanndon A. Ocampo
Keyword(s):  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Heat Load ◽  
Ventilation System ◽  
Internal Heat ◽  
The Philippines ◽  
Airflow Rate ◽  
Displacement Ventilation ◽  
Tropical Country

Due to its significant role in improving indoor air quality, displacement ventilation system is widely adopted in current literature. This paper proposes a displacement ventilation system for room conditions with ceilings that are relatively low, internal heat load could be high, walls could be sunlit, and occupants doing the low physical activity. These conditions are prevalent in the Philippines, being a tropical country. Input parameters to the design process such as heat load, the height of the ceiling, comfort, and indoor air quality requirements were generated, and the main output parameters are the stratification height and ventilation airflow rate. To demonstrate the proposed displacement ventilation system, four cases were generated. Results show that the ventilation airflow rates obtained from the four cases were greater than the minimum outdoor air requirements for health in conference rooms and large assembly areas which are 17.5 and 3.5 liters/sec*person respectively, for smoking and no smoking rooms.

Sick building symptoms among hospital workers associated with indoor air quality and personal factors

2019 ◽  
Vol 29 (5) ◽  
pp. 645-655 ◽  
Author(s):  
Ulken Tunga Babaoglu ◽  
Fikriye Milletli Sezgin ◽  
Funda Yag
Keyword(s):  
Air Quality ◽  
Respiratory Tract ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Sick Building Syndrome ◽  
Upper Respiratory Tract ◽  
Personal Factors ◽  
Hospital Workers ◽  
Cross Sectional ◽  
Sick Building

This study assesses the interior air quality and infective factors in a hospital in Turkey to provide data about air quality to protect hospital workers. This study measured indoor air quality in eight different locations in a hospital, including particulate matter (PM2.5 and PM1), carbon dioxide, carbon monoxide, temperature, humidity and microbiological matter. The highest PM2.5 and PM1 concentrations were in emergency service, and the highest CO2 was measured in the paediatric clinic. The poor interior air quality results are the most important cross-sectional data. For all participants, the prevalence of eye, upper respiratory tract, lower respiratory tract, skin and non-specific sick building syndrome symptoms were 23.0%, 40.7%, 22.5%, 36.3% and 63.7%, respectively. When sick building syndrome symptoms and environmental factors were investigated, skin symptoms increased 1.82 times in areas with stagnant air flow (p = 0.046; OR = 1.823; 95% CI: 1.010–3.290). Non-specific symptoms increased 2.17 times in locations with dry indoor air (p = 0.039; OR = 2.176; 95% CI: 1.041–4.549). Hospital workers are exposed to conditions that may increase the risk of a variety of sick building syndrome symptoms. Although the air quality measurements were not above the recommended limits in the hospital, long-term exposures should be considered for those experiencing sick building syndrome-related symptoms.

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