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Effect of thermal mass, night ventilation and window shading on summer thermal comfort of buildings in a temperate climate
Abstract Night ventilation and external blinds are the most commonly used passive methods to protect buildings from overheating during high summer temperatures. Another recommended measure is high thermal inertia of buildings. The aim of the study was to compare the effectiveness of night ventilation, external blinds and thermal mass during a heat wave on the thermal performance of a building during a heat wave in a temperate climate. Increasing the thermal mass of the room from light to very heavy without night ventilation resulted in a reduction of the average peak temperature by 3.7 K in a day and 1.2 K by night. The activation of night ventilation in a light room resulted in a reduction of the average value of the peak temperature by 1.5 K during the day and 5.9 K at night. Increase of thermal mass from light to heavy and night ventilation from 0.6 to 10 ACH led to decrease of average peak temperature by 4.7 K in a day and 4.6 K by night. The simultaneous increase of thermal mass, activation of night ventilation and closing of external blinds resulted in lowering the average peak temperature by 7.4 K in a day and 6.3 K by night. The analysis of the test results indicates that the high thermal mass and the closing of the external blinds reduces the diurnal variations of the indoor temperature, while the activation of nighventilation increases it significantly, especially for lightweight construction.
Highlights The study was conducted during 2 heat waves with average maximum temperature 30.1°C and 31.8°C. By combining all the passive methods analyzed, hours with maximum temperatures above 28oC were eliminated. Coupling of high thermal mass with night ventilation eliminated hours with temperature above 31oC. Increasing the thermal mass from light to heavy almost eliminated hours exceeding the absolute Tmax value. Using night ventilation significantly increased the diurnal variations of indoor temperature.
Effect of thermal mass, night ventilation and window shading on summer thermal comfort of buildings in a temperate climate
Abstract Night ventilation and external blinds are the most commonly used passive methods to protect buildings from overheating during high summer temperatures. Another recommended measure is high thermal inertia of buildings. The aim of the study was to compare the effectiveness of night ventilation, external blinds and thermal mass during a heat wave on the thermal performance of a building during a heat wave in a temperate climate. Increasing the thermal mass of the room from light to very heavy without night ventilation resulted in a reduction of the average peak temperature by 3.7 K in a day and 1.2 K by night. The activation of night ventilation in a light room resulted in a reduction of the average value of the peak temperature by 1.5 K during the day and 5.9 K at night. Increase of thermal mass from light to heavy and night ventilation from 0.6 to 10 ACH led to decrease of average peak temperature by 4.7 K in a day and 4.6 K by night. The simultaneous increase of thermal mass, activation of night ventilation and closing of external blinds resulted in lowering the average peak temperature by 7.4 K in a day and 6.3 K by night. The analysis of the test results indicates that the high thermal mass and the closing of the external blinds reduces the diurnal variations of the indoor temperature, while the activation of nighventilation increases it significantly, especially for lightweight construction.
Highlights The study was conducted during 2 heat waves with average maximum temperature 30.1°C and 31.8°C. By combining all the passive methods analyzed, hours with maximum temperatures above 28oC were eliminated. Coupling of high thermal mass with night ventilation eliminated hours with temperature above 31oC. Increasing the thermal mass from light to heavy almost eliminated hours exceeding the absolute Tmax value. Using night ventilation significantly increased the diurnal variations of indoor temperature.
Effect of thermal mass, night ventilation and window shading on summer thermal comfort of buildings in a temperate climate
Kuczyński, Tadeusz (author) / Staszczuk, Anna (author) / Gortych, Marta (author) / Stryjski, Roman (author)
Building and Environment ; 204
2021-07-05
Article (Journal)
Electronic Resource
English
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