Analysis of the impact of the parameters of outside air on the condition of indoor air

Zender–Świercz, Ewa

doi:10.1007/s13762-017-1275-5

Cited by 11 publications

(10 citation statements)

References 4 publications

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“…Dotyczy to zwłaszcza komfortu cieplnego [2]. Ponadto poczucie komfortu termicznego bądź też jego braku zależy od takich czynników środowiskowych jak [4][5][6][7]16]: temperatury powietrza w pomieszczeniu, prędkości przepływu powietrza przez pomieszczenie, wilgotności względnej powietrza wewnętrznego, temperatury promieniowania powierzchni, asymetrii rozkładu temperatury w pomieszczeniu. Zatem niezmiernie ważne wydaje się określenie oceny komfortu termicznego w takich pomieszczeniach jak wybrane przez autorów do analizy.…”

Section: Wprowadzenieunclassified

“…This applies in particular to thermal comfort [2]. In addition, the sense of thermal comfort or lack of it depends on environmental factors such as [4][5][6][7]16] air temperature in the room, air-flow rate in the room, relative humidity of the indoor air, surface radiation temperature, asymmetry of the temperature distribution in the room. Therefore, it seems extremely important to determine the thermal comfort evaluation in such rooms as selected by the authors for analysis.…”

Section: Introductionmentioning

confidence: 99%

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Thermal Comfort in University Computer Laboratories

Telejko

Stachera

2018

SAE

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A b s t r a c tThermal comfort defines the state of satisfaction of a person or a group of people with thermal conditions of the environment in which the person, or the group of people is staying. The state of satisfaction depends on the balance between the amount of heat produced by the organism in the process of metabolism and heat loss from the organism to the surrounding environment. It has an effect on the quality and efficiency at work, and indirectly also on the presence of symptoms of Sick Building Syndromes (SBS). Due to differences in body structure, metabolism, clothing etc., it is not possible to create a satisfactory thermal environment for all the people staying in it. However, there are parameter values, which maintained at an appropriate level, allow to meet thermal expectations of even 95% of people staying in this environment. The article presents the results of tests conducted in the university computer rooms. The studies included measurements and analysis of typical internal microclimate parameters: temperature, relative humidity and CO 2 concentration. The results raised considerable reservations and therefore in order to assess fully the conditions of use, it has been decided to conduct evaluation of thermal comfort in rooms analysed. In addition, the surrounding surface radiation temperature and clothing insulation of users have been specified. On the basis of the obtained data, PPD and PMV index values were determined in accordance with the standard EN ISO 7730:2005 Ergonomics of the thermal environment -Analytical determination and interpretation of thermal comfort using calculation of the PMV and PPD indices and local thermal comfort criteria [3]. S t r e s z c z e n i eKomfort cieplny określa stan zadowolenia osoby lub grupy osób z warunków termicznych środowiska, w którym osoba ta lub grupa osób przebywa. Ten stan zadowolenia zależny jest od równowagi pomiędzy ilością ciepła wytwarzanego przez organizm w procesie metabolizmu a stratami ciepła z organizmu do otaczającego go środowiska. Ma on wpływ na jakość i wydajność pracy, a pośrednio również na występowanie symptomów syndromów chorego budynku (SBS). Na skutek różnic w budowie ciała, metabolizmie, ubiorze etc. nie ma możliwości stworzenia środowiska cieplnego odpowiadającego wszystkim przebywającym w nim osobom. Istnieją jednak wartości parametrów, które utrzymane na odpowiednim poziomie, pozwalają na spełnienie oczekiwań termicznych nawet 95% ludzi przebywających w tym środowisku. W artykule zaprezentowano wyniki badań przeprowadzonych w pomieszczeniach komputerowych uczelni wyższej. Badania obejmowały pomiary oraz analizę typowych parametrów mikroklimatu wewnętrznego: temperatury, wilgotności względnej oraz stężenia CO 2 . Uzyskane wyniki budziły spore zastrzeżenia, dlatego w celu pełnej oceny warunków użytkowania zdecydowano się na przeprowadzenie oceny komfortu termicznego analizowanych pomieszczeń. Dodatkowo określono zatem temperaturę promieniowania powierzchni otaczających i izolacyjność odzieży użytkowników. Na podstawie otr...

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Section: Wprowadzenieunclassified

Section: Introductionmentioning

confidence: 99%

Thermal Comfort in University Computer Laboratories

Telejko

Stachera

2018

SAE

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“…Ioannou and Itard [12] in their research developed and applied in 30 residential dwellings in-situ method for real time measurements of the quantitative and qualitative parameters that affect thermal comfort. Many other authors choose CO 2 as a primary indicator of indoor air quality [13]. In many cases the weather conditions do not affect the indoor CO 2 concentrations [14].…”

Section: Introductionmentioning

confidence: 99%

Indoor Air Quality Assessment in a Single-Family House Equipped with Demand Controlled Mechanical Ventilation

Müller

Debowski

2020

Ecological Chemistry and Engineering S

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The paper presents the results of modelling airflow for ventilation of a single-family house with an area of 180 m2. The building was equipped with mechanical ventilation with the possibility of varying the airflow. The airflow was calculated as a function of carbon dioxide concentration. The presence of people in selected rooms was an internal source of carbon dioxide. In order to properly design of a ventilation system and then model the contamination level, ContamW software was used. The year-long cost analysis was carried out for the installation working with variable airflow (day, night). The analysis took into account the price of the electricity used by the fans of Air Handling Unit and meteorological data to estimate the power input to the heater of the Unit. Different scenarios of system operation were included as an input data in order to find a difference in energy consumption. The calculations were to answer the question of whether it is necessary to apply expensive and advanced system that enables individual control of the airflow in every room or use the simple control of the central unit to vary the airflow in the ventilation system of single-family houses. The difference in operating cost between the system that maintains 800 and 600 ppm reaches 100 % and demonstrates the need of simple demand controlled ventilation system.

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“…The selected substances are acetaldehyde, acrolein, α-pinene, benzene, carbon dioxide, formaldehyde, naphthalene, nitrogen dioxide, PM10, PM2.5, radon, styrene, toluene, trichloroethylene, TVOC and mould (Salis et al 2017). Some scientists view the IAQ index as an indicator of the concentration of CO 2 (Khazaei et al 2019;Zender-Świercz 2017Zender-Świercz , 2018.…”

Section: Introductionmentioning

confidence: 99%

The concentration of carbon dioxide in conference rooms: a simplified model and experimental verification

Teleszewski

Gładyszewska-Fiedoruk

2019

Int. J. Environ. Sci. Technol.

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Based on an experimental study, a simplified model is constructed for the concentration of carbon dioxide in conference rooms with stack ventilation. The experiments were carried out in a conference room in the building of the Faculty of Civil and Environmental Engineering at Białystok University of Technology in Poland. Tests were performed with and without prior airing of the room by opening windows before sessions. The air supply was regulated by unsealing or opening of the windows. In all cases, a linear increase in the level of carbon dioxide was recorded during sessions. The increase in carbon dioxide concentration in rooms of this type is dependent primarily on the volume of the room, the number of people occupying it and the air change rate. In this work, a simplified comprehensive formula was developed to predict the concentration of carbon dioxide in rooms. The model may be applied for the design of systems of automatic regulation in ventilation installations and for analysis of carbon dioxide concentrations in closed rooms used by people. It is proposed that the model can be applied in the regulation of mechanical ventilation in rooms based on the concentration of carbon dioxide.

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Analysis of the impact of the parameters of outside air on the condition of indoor air

Cited by 11 publications

References 4 publications

Thermal Comfort in University Computer Laboratories

Thermal Comfort in University Computer Laboratories

Indoor Air Quality Assessment in a Single-Family House Equipped with Demand Controlled Mechanical Ventilation

The concentration of carbon dioxide in conference rooms: a simplified model and experimental verification

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