Determining the Ventilation Rate inside an Apartment House on the
Basis of Measured Carbon Dioxide Concentrations – Case Study

Kapalo, Peter; Vilčeková, Silvia; Domniţa, Florin; Bacotiu, Ciprian; Voznyak, Orest

doi:10.3846/enviro.2017.262

Cited by 20 publications

(14 citation statements)

References 8 publications

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“…In several situations, the carbon dioxide levels within what has traditionally been considered acceptable may mask the presence of other pollutants and risks. This situation has been previously identified [ 115 , 116 , 117 , 118 , 119 ] and should be subject to future considerations.…”

Section: Discussionmentioning

confidence: 60%

Bad Air Can Also Kill: Residential Indoor Air Quality and Pollutant Exposure Risk during the COVID-19 Crisis

Domínguez-Amarillo

Fernández-Agüera

Cesteros-García

et al. 2020

IJERPH

107

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During the first outbreak of the SARS-CoV-2 pandemic the population, focusing primarily on the risk of infection, was generally inattentive to the quality of indoor air. Spain, and the city of Madrid in particular, were among the world’s coronavirus hotspots. The country’s entire population was subject to a 24/7 lockdown for 45 days. This paper describes a comparative longitudinal survey of air quality in four types of housing in the city of Madrid before and during lockdown. The paper analysed indoor temperatures and variations in CO2, 2.5 μm particulate matter (PM2.5) and total volatile organic compound (TVOC) concentrations before and during lockdown. The mean daily outdoor PM2.5 concentration declined from 11.04 µg/m3 before to 7.10 µg/m3 during lockdown. Before lockdown the NO2 concentration values scored as ‘very good’ 46% of the time, compared to 90.9% during that period. Although the city’s outdoor air quality improved, during lockdown the population’s exposure to indoor pollutants was generally more acute and prolonged. Due primarily to concern over domestic energy savings, the lack of suitable ventilation and more intensive use of cleaning products and disinfectants during the covid-19 crisis, indoor pollutant levels were typically higher than compatible with healthy environments. Mean daily PM2.5 concentration rose by approximately 12% and mean TVOC concentration by 37% to 559%. The paper also puts forward a series of recommendations to improve indoor domestic environments in future pandemics and spells out urgent action to be taken around indoor air quality (IAQ) in the event of total or partial quarantining to protect residents from respiratory ailments and concomitantly enhanced susceptibility to SARS-CoV-2, as identified by international medical research.

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Section: Discussionmentioning

confidence: 60%

Bad Air Can Also Kill: Residential Indoor Air Quality and Pollutant Exposure Risk during the COVID-19 Crisis

Domínguez-Amarillo

Fernández-Agüera

Cesteros-García

et al. 2020

IJERPH

107

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“…Therefore, the most rational scheme of air distribution in the case of the presence of process equipment and maintenance staff in a production space of low height is the application of a method of supplying air to the working area by laying jets. It is advisable to propose the use of air distributors with a high intensity of extinguishing the velocity and temperature of the inflow air, that is, devices that provide an intense mixing of the tidal air with the surrounding (Dovhaliuk & Міleikovskyi, 2013;Kapalo et al, 2017). Today, there are a large number of different designs of air distributors and circuits of distribution of inflow air, both in the upper and in the working area of premises (Kapalo et al, 2014;Srebric & Chen, 2002), where the effect of laying the jets on the interior surfaces of walls or ceilings, which is a fairly widespread phenomenon in ventilation technology.…”

Section: Techniques Usedmentioning

confidence: 99%

Investigation of the Return Flow at the Air Distribution by Swirl and Flat Laying Air Jets in Small-Sized Premises

Voznyak¹,

Adamski²,

Kapalo³

et al. 2020

Theory build. pract.

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In this article the results of return flow at air distribution by flat laying jets experimental investigations are presented. The chart is composed, analytic equations are also obtained. By these results high efficiency of proposed air distribution scheme using in technological small-sized rooms is shown. The purpose of the work is to study the nature of the propagation of the swirl and flat flooring jets in a limited space of a production space of low height with the presence of technological equipment and maintenance personnel in it, to identify the patterns of development of the air tidal stream in the reverse flow and to justify the calculation methodology. The quantitative description of the characteristics and regularities of the development of the swirl and flat flooring compressed jets in the reverse flow is established. Calculation dependences were obtained for determining the parameters of the swirl and flat flooring compressed jets in the reverse flow. It is substantiated that the efficiency of the application of the swirl and flat flooring jets to supply air to the working area of the technological premises is high. The obtained results allow us to calculate the initial velocity of the swirl and tidal flat flooring compressed stream in a small-sized production rooms with the presence of technological equipment and service personnel and to determine the geometric parameters of the air distribution device. Application of air distribution with the use of the swirl and flat air jet laying effect allows to significantly increase the Air Distribution Performance Index criteria when supplying a big amount of air to the technological premises and thereby reducing the material consumption of the ventilation system.

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“…This results in the fact that the long range of the air jet becomes too low and needs to be increased. The consequence of this is an excessive concentration of CO 2 in the room [13,15,19,20]. This phenomenon means that the ventilation system has a damage type 2.…”

Section: Introductionmentioning

confidence: 99%

Diagnosis of damage to the ventilation system

Spodyniuk¹,

Voznyak²,

Sukholova³

et al. 2021

Diagnostyka

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The article is devoted to solving of urgent problem to eliminate damages of two types in ventilation systems for air distribution efficiency increasing in the premises by swirled air flow, compact air jet, flat air stream and rectangular air jet. A mathematical model of air supply with swirled air flow, compact air jet, flat air jet and rectangular air stream in the room has been developed. It is shown that in order to achieve the maximum efficiency of air distribution it is necessary to ensure its supply by jets. Graphical and analytical dependences on the basis of the conducted experimental research are presented. Parameters of swirled air flow, compact air jet, flat air stream and rectangular air jet during the formation of a comfortable indoor climate are determined. The results of experimental studies of air supply to the room by the air distribution devices, which form a swirled air flow, compact air stream, flat air flow and rectangular air jet with adequate turbulence and long range of the supply air flow, are presented. It is established that with the increase of the angle of swirling plates inclination and ratio of the slit sides the air jets long range increases.

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Determining the Ventilation Rate inside an Apartment House on the Basis of Measured Carbon Dioxide Concentrations – Case Study

Cited by 20 publications

References 8 publications

Bad Air Can Also Kill: Residential Indoor Air Quality and Pollutant Exposure Risk during the COVID-19 Crisis

Bad Air Can Also Kill: Residential Indoor Air Quality and Pollutant Exposure Risk during the COVID-19 Crisis

Investigation of the Return Flow at the Air Distribution by Swirl and Flat Laying Air Jets in Small-Sized Premises

Diagnosis of damage to the ventilation system

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