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

Abstract

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.

The Relationship between Ventilation and Physical Quality of Houses with Pulmonary Tuberculosis Cases in the Working Area of Sragen Primary Healthcare Center, Sragen Regency

“…TB cases occur due to inadequate ACH which potentially transmit TB bacteria to the house occupants. ACH depends on the speed and movement of air entering and leaving the house (16). Expanding ventilation such as opening windows and doors every day can reduce the number of contaminants at the house (17).…”

Estimations of infiltration factors of diurnal PM 2.5 and heavy metals in children’s bedrooms

“…In our study bedrooms, natural ventilation was the predominant ventilated type during the periods of sampling, the ventilation rate closed to the previous studies that calculated values. 51,52 However, the ventilation rates were higher in the daytime than in the nighttime during the hot season. Studies have demonstrated that AC use reduces the ventilation rate.…”

“…However, the ventilation rates were higher in the daytime than in the nighttime during the hot season. Studies have demonstrated that AC use reduces the ventilation rate 51,53 . In the hot season, hours of AC use were higher at nighttime than at daytime in the children’s bedrooms (Table S4).…”

“…Studies have demonstrated that AC use reduces the ventilation rate. 51,53 In the hot season, hours of AC use were higher at nighttime than at daytime in the children's bedrooms (Table S4). Our data showed that the hour of AC use per day was negatively associated (r = −0.70, p < 0.05) with the ventilation rate (daily average) during the hot season.…”

“…During the cold season, the differences between daytime and nighttime PM 2.5 F inf value were not significant. Previous studies have demonstrated that AC use, fan use, and window opening change the ventilation rate, 51,54 which further influences the distribution of PM 2.5 F inf values. Air purifier use also changes the PM 2.5 F inf 55 .…”