Concentration variations of pollutants in a work week period of an office

Chuah, Yew Khoy; Fu, Yu-Meng; Hung, Chin-Hsien; Tseng, Pen Chang

doi:10.1016/s0360-1323(97)00018-8

Cited by 10 publications

(6 citation statements)

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“…It was reported that there was no significant difference in average CO 2 concentration between the morning and the afternoon sessions because the CO 2 concentration in a typical ventilated space could be diluted by a properly designed ventilation system where the change in spatial CO 2 concentration was generally observed [3,[26][27][28][29]. The indoor CO 2 concentrations in the office during working hours 0900 to 1700 for all working days throughout the year are shown in Fig.…”

Section: Co 2 Measurementmentioning

confidence: 95%

“…A proper understanding of the relationship between the indoor pollutant concentrations and the ventilation rate can only be found from a longitudinal monitoring process [26]. Since there is no standard protocol for the office calibration, an extensive measurement was used in An entire floor of the building, served as an open-plan office, was selected for this study.…”

Section: Co 2 Measurementmentioning

confidence: 99%

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Evaluation on sampling point densities for assessing indoor air quality

Mui

Wong

2006

Building and Environment

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Section: Co 2 Measurementmentioning

confidence: 95%

Section: Co 2 Measurementmentioning

confidence: 99%

Evaluation on sampling point densities for assessing indoor air quality

Mui

Wong

2006

Building and Environment

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“…The mean value of CO 2 concentration monitored by the three samplers was used to determine ventilation rates in the space. The determination was performed based on the theoretical background that has been approved and effectively used in other previous research [39–43].…”

Section: Methodsmentioning

confidence: 99%

Improvement of Indoor Living Environment by Occupants’ Preferences for Heat Recovery Ventilators in High-Rise Residential Buildings

Kim

Lee

Moon

et al. 2011

Indoor and Built Environment

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This study examined the influence of heat recovery ventilators (HRVs) on energy savings and indoor air quality (IAQ) in high-rise residential buildings. Field measurements were performed in four residential units, which were validated by computer simulations and estimated the total annual energy consumption. The operation schedules for HRVs were determined by a survey of residents. Field measurement results indicate that HRVs could effectively improve IAQ and afford effective energy savings. The indoor concentrations of formaldehyde were reduced by 54.6% after HRVs were operated for 24 h. The initial concentration was reduced by 82% after 168 h. Toluene was the dominant volatile organic compounds (VOCs) in the indoor air. Its initial concentration was reduced by 50% and other VOCs were also reduced by 40.1% to 53.1% after HRVs were operated. Annual energy savings of up to 20.26% were predicted when HRVs were operated for 24 h continuously, exchanging sensible and latent heat. HRVs could save energy more effectively in winter than in summer due to the greater temperature difference between outdoor and indoor air. Based on the preferred operation schedules of homes surveyed, an annual energy savings could be as high as 8.52%.

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“…Today, SF 6 is the most frequently used tracer gas worldwide, which is confirmed by the number of relevant publications. In this chapter, only on a very limited selection of publications could be considered (Chuah et al, 1997;Howard-Reed et al, 2002;Kumar et al, 1979;Lagus & Grot, 1997;Raatschen, 1995;Shaw, 1984;Walker & Forest, 1995;Wilson et al, 1996). SF 6 is very stable and only decomposes above 550 °C.…”

Section: Sulphur Hexafluoride (Sf 6 )mentioning

confidence: 99%