Analysis of ventilation air exchange rate and indoor air quality in the office room using metabolically generated CO<sub>2</sub>.

Nowak, Katarzyna; Nowak-Dzieszko, Katarzyna; Marcinowski, A.

doi:10.1088/1757-899x/415/1/012028

Cited by 10 publications

(3 citation statements)

References 2 publications

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“…Standard [31] describes among other method to the tracer gas concentration decay method which were used in this paper. According to [32][33][34][35][36], the tracer gas method may be used for determination of air change rate. The CO 2 is used as a tracer gas in our case.…”

Section: Measurement Of Carbon Dioxide Concentration Valuesmentioning

confidence: 99%

Quantification of Air Change Rate by Selected Methods in a Typical Apartment Building

2021

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An important parameter that affects indoor climate of buildings and also ventilation heat losses and gains is the speed of air change between the outdoor environment and the interior of buildings. Indoor air quality is therefore significantly associated with ventilation. Quantification of air change rate is complicated, because it is impacted by many parameters, the most variable of which is air flow. This study focuses on the determination and comparison of air change rate values in two methods by quantification of the aerodynamic coefficient Cp = Cpe − Cpi, so-called “aerodynamic quantification of the building” and the methodology based on “experimental measurements of carbon dioxide”. The study describes and takes into account the effect of wind, building parameters and air permeability for the building using “aerodynamic quantification of the building”. The paper compares these calculated results with the values obtained from experimental measurements method of carbon dioxide in a selected reference room in apartment building and evaluates the accuracy of the prediction of the air exchange rate obtained by these methods. At higher wind speeds the values of air change rate with considering the effect of openings are closer to the values obtained based on experimental measurements of carbon dioxide and the difference between the values without considering the effect of openings increases significantly.

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Section: Measurement Of Carbon Dioxide Concentration Valuesmentioning

confidence: 99%

Quantification of Air Change Rate by Selected Methods in a Typical Apartment Building

2021

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“…The similar problems were described by Bulinska [2], who used metabolically generated carbon dioxide to determine efficiency of ventilation systems in the buildings. Zhang [3], Nowak-Dzieszko [4] used the same method while testing the ventilation rates of dormitories and offices. Air quality measurements in the university facilities were described by Benedettelli [5] and Cichowicz [6].…”

Section: Indoor Air Quality Factors 21 Building Ventilationmentioning

confidence: 99%

Internal particulate matter pollution in educational building

Nowak-Dzieszko

Kisilewicz

2020

E3S Web Conf.

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The authors undertook research on the proper strategy of operation of educational building with gravitational ventilation in historic city center with high concentration of particulate matter PM10 and PM 2.5. In this facility the momentary increase in carbon dioxide concentration is often very high, and at the same time health requirements regarding atmospheric aerosol should be absolutely met. That is why long-term measurements of PM concentration outside and inside, as well as carbon dioxide concentration inside were carried out. CO2 was used also as a tracer gas for measurement of air change intensity. The article presents the first results of these tests and a correlation that occurs between the external and internal concentration of particulate matter PM 10 and PM 2.5. Due to a significant filtration effect of the external building envelope and particle deposition a potential conflict between required gravitational ventilation intensity and internal air pollution with particulate matters was partially reduced.

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“…A fresh air supply is crucial for a healthy indoor environment, especially in highly occupied rooms [1]. If non-ventilated, enclosed spaces are exposed to an increased concentration of metabolically generated carbon dioxide emissions [2] from the occupants' breathing. A low carbon dioxide concentration is an indicator of the indoor air's freshness.…”

Section: Introductionmentioning

confidence: 99%

Indoor Climate Performance in a Renovated School Building

Mocová

Mohelníková

2021

Energies

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Indoor climate comfort is important for school buildings. Nowadays, this is a topical problem, especially in renovated buildings. Poorly ventilated school classrooms create improper conditions for classrooms. A post-occupancy study was performed in a school building in temperate climatic conditions. The evaluation was based on the results of long-term monitoring of the natural ventilation strategy and measurements of the carbon dioxide concentration in the school classroom’s indoor environment. The monitoring was carried out in an old school building that was constructed in the 1970s and compared to testing carried out in the same school classroom after the building was renovated in 2016. Surprisingly, the renovated classroom had a significantly higher concentration of CO2. It was found that this was due to the regulation of the heating system and the new airtight windows. The occupants of the renovated classroom have a maintained thermal comfort, but natural ventilation is rather neglected. A controlled ventilation strategy and installation of heat recovery units are recommended to solve these problems with the classroom’s indoor environment. Microbiological testing of the surfaces in school classrooms also shows the importance of fresh air and solar radiation access for indoor comfort.

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Analysis of ventilation air exchange rate and indoor air quality in the office room using metabolically generated CO₂.

Cited by 10 publications

References 2 publications

Quantification of Air Change Rate by Selected Methods in a Typical Apartment Building

Quantification of Air Change Rate by Selected Methods in a Typical Apartment Building

Internal particulate matter pollution in educational building

Indoor Climate Performance in a Renovated School Building

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Analysis of ventilation air exchange rate and indoor air quality in the office room using metabolically generated CO2.

Cited by 10 publications

References 2 publications

Quantification of Air Change Rate by Selected Methods in a Typical Apartment Building

Quantification of Air Change Rate by Selected Methods in a Typical Apartment Building

Internal particulate matter pollution in educational building

Indoor Climate Performance in a Renovated School Building

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Product

Resources

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Analysis of ventilation air exchange rate and indoor air quality in the office room using metabolically generated CO₂.