A Review of CO<sub>2</sub>Measurement Procedures in Ventilation Research

Mahyuddin, Norhayati; Awbi, Hazim

doi:10.1080/14733315.2012.11683961

Cited by 68 publications

(67 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The sensitivity of the device is 0.1 % RH. The devices were placed close to the center of the occupied area in height of 0.8 m to 1 m. This approach is agreed with the results published by [5].…”

Section: The Measuring Instrumentssupporting

confidence: 80%

Comparison of the Intensity of Ventilation at Windows Exchange in the Room - Case Study

Kapalo

Voznyak

2017

Selected Scientific Papers - Journal of Civil Engineering

View full text Add to dashboard Cite

Doing the replacement of old wooden windows in a new plastic windows, in the old buildings, we get the great reducing of the building heat loss. Simpler maintenance and attendance of window is the next advantage. New windows are characterized by better tightness. The aim of the article is determination due to the performed experimental measurements, how much more are reduce the uncontrolled ventilation that is caused of the infiltration windows. In the article there is presented the experimental measurement of indoor air quality in the room in two phases. In the first phase there is the room installed by 55 year old wood window. In the second phase there is the same room installed by new plastic window. Due to the experimental measurement of indoor air quality it is calculated intensity of ventilation -infiltration. These results of ventilation intensity are reciprocally compared.

show abstract

Section: The Measuring Instrumentssupporting

confidence: 80%

Comparison of the Intensity of Ventilation at Windows Exchange in the Room - Case Study

Kapalo

Voznyak

2017

Selected Scientific Papers - Journal of Civil Engineering

View full text Add to dashboard Cite

show abstract

“…Previous studies showed that indoor CO 2 concentrations were similar to and higher than the American Society of Heating and Refrigerating and Air-conditioning Engineers (ASHRAE) Standard of 1000 ppm [24], depending on both internal sources and external background concentration, coupled with low air exchange rate [4,5]. The CO 2 concentration is widely used as an indicator of indoor ventilation effectiveness, and high CO 2 values in the spring hotels indicated insufficient ventilation [6]. During the sampling time, when the windows were closed due to high air temperatures, the air conditioner could only cool the air and did not introduce fresh air into the room.…”

Section: Resultsmentioning

confidence: 99%

“…The detected levels of indoor air pollutants like some Volatile Organic Compound (VOC) species, CO 2 , and particulate matter often exceed outdoor levels by up to 5 times [1,2], and most individuals spend most of their time in indoor environments [3]. Pollutants in indoor microenvironments easily accumulate due to various emissions and poor ventilation [4][5][6], and thus cause adverse health effects, like some chronic diseases of sensory irritation, asthma, rhinitis and even some cancers such as leukemia [2,7]. Statistics from 2008 showed that 36% of lower respiratory diseases and 22% of chronic obstructivepulmonary disease were caused by indoor air pollution [8].…”

Section: Introductionmentioning

confidence: 99%

Exposure to Particle Matters and Hazardous Volatile Organic Compounds in Selected Hot Spring Hotels in Guangdong, China

Song

Yan

et al. 2016

Atmosphere

View full text Add to dashboard Cite

Abstract:In Guangdong province, many hot springs were exploited and developed into popular places for tourist. In addition, hotels have been set up near hot spring sites to attract people, including local citizens, to spend their spare time inside these so-called "spring hotels". In our study, indoor air quality was investigated in four hot spring hotels in Guangdong province, China. Measured indoor pollutants included CO 2 , CO, PM 10 , PM 2.5 and Volatile Organic Compounds (VOCs). As the result show, high concentrations of carbon dioxide might be attributed to poor ventilation; and the variations of indoor PM 10 , PM 2.5 concentrations were related to occupants' activities. Alpha-pinene and toluene were the most common VOC species in the hot spring hotels other than monocyclic aromatic hydrocarbons like Benzene, Toluene, Ethylbenzene and Xylenes (BTEX), which were at medium levels among the reported indoor pollutants. High cancer risk of benzene in the newly decorated rooms should be seriously taken into consideration in the future. Indoor to Outdoor air concentration ratios (I/O) for CO 2 and VOCs were higher than 1, indicating their strong indoor sources. Negative correlations were found between indoor CO 2 and all the other compounds, and VOCs were shown to be significantly correlated (p < 0.01) to each other, including aromatic hydrocarbons and mono-terpenes. For indoor and outdoor air compounds, correlation coefficients among all compounds did not show a significant correlation, which indicated that these pollutants had different sources. Principal components analysis by SPSS showed that indoor materials, inhabitants' activities and respiration, cleaning products and outdoor sources were the main sources of indoor detected pollutants in hot spring hotels.

show abstract

“…The outdoor air in most locations contains down to about 380 parts per million carbon dioxide. While levels below 5,000 ppm are considered to pose no serious health threat, experience indicates that individuals in schools with elevated CO 2 concentrations tend to report drowsiness, lethargy and a general sense that the air is stale (Mahyuddin and Awbi, 2012). Researchers have been looking for links between elevated CO 2 concentrations and reduced attendance, productivity or achievement (Shendell et al, 2004;Wargocki and Wyon, 2006).…”

Section: Comfort Parameters and Ventilation Ratesmentioning

confidence: 99%

Comfort Parameters and Particulate Matter (PM10 and PM2.5) in School Classrooms and Outdoor Air

Alves

Nunes

Silva

et al. 2013

Aerosol Air Qual. Res.

View full text Add to dashboard Cite

In January 2012, one kindergarten and eight elementary school classrooms were monitored. The campaign included simultaneous measurements, indoors and outdoors, of comfort parameters, CO, CO 2 and particles. Automatic monitors using a light scattering technique were employed to measure PM 10 continuously. During occupied periods, low volume samplers were used to daily collect PM 2.5 samples, which were subsequently analysed for carbonates, organic carbon (OC), elemental carbon (EC) and water soluble inorganic ions. With regard to comfort, the schools did not meet the recommended levels in many rooms. Indoor-outdoor CO 2 ratios between 3 and 12, and indoor levels much higher than 1000 ppm during the occupied periods, indicate the highly inadequate ventilation in these locations. The results clearly demonstrate that there is a high level of exposure to particulate matter in these schools. The continuous measurements of PM 10 suggest that the physical activity of pupils, which is assumed to be more marked in younger children, contributes to a constant process of resuspension of sedimented particles. In addition, peak PM 10 concentrations coincident with cleaning activities suggest the need to change certain practices to improve cleanliness. Around 40% of the PM 2.5 mass is composed of carbonaceous matter, with 4-5 times higher OC mass fractions than EC. It was observed that both OC and EC were significantly influenced by indoor sources. Water-soluble inorganic ions represented around 10-20% of the PM 2.5 mass measured in classrooms. Excluding calcium, in general the ionic species were present at indoor-outdoor ratios of less than 1, suggesting the major origin in the outdoor air.

show abstract

A Review of CO₂Measurement Procedures in Ventilation Research

Cited by 68 publications

References 42 publications

Comparison of the Intensity of Ventilation at Windows Exchange in the Room - Case Study

Comparison of the Intensity of Ventilation at Windows Exchange in the Room - Case Study

Exposure to Particle Matters and Hazardous Volatile Organic Compounds in Selected Hot Spring Hotels in Guangdong, China

Comfort Parameters and Particulate Matter (PM10 and PM2.5) in School Classrooms and Outdoor Air

Contact Info

Product

Resources

About

A Review of CO2Measurement Procedures in Ventilation Research

Cited by 68 publications

References 42 publications

Comparison of the Intensity of Ventilation at Windows Exchange in the Room - Case Study

Comparison of the Intensity of Ventilation at Windows Exchange in the Room - Case Study

Exposure to Particle Matters and Hazardous Volatile Organic Compounds in Selected Hot Spring Hotels in Guangdong, China

Comfort Parameters and Particulate Matter (PM10 and PM2.5) in School Classrooms and Outdoor Air

Contact Info

Product

Resources

About

A Review of CO₂Measurement Procedures in Ventilation Research