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Condensation at the exterior surface of windows

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Condensation at the exterior surface of windows. / Laukkarinen, Anssi; Kero, Paavo; Vinha, Juha.

julkaisussa: Journal of Building Engineering, Vuosikerta 19, 01.09.2018, s. 592-601.

Tutkimustuotosvertaisarvioitu

Harvard

Laukkarinen, A, Kero, P & Vinha, J 2018, 'Condensation at the exterior surface of windows', Journal of Building Engineering, Vuosikerta. 19, Sivut 592-601. https://doi.org/10.1016/j.jobe.2018.06.014

APA

Vancouver

Author

Laukkarinen, Anssi ; Kero, Paavo ; Vinha, Juha. / Condensation at the exterior surface of windows. Julkaisussa: Journal of Building Engineering. 2018 ; Vuosikerta 19. Sivut 592-601.

Bibtex - Lataa

@article{71030b97228b4903a18b1d7655cfb757,
title = "Condensation at the exterior surface of windows",
abstract = "New energy efficient windows have a higher risk for outdoor air vapour condensing to their exterior surface, when compared to older windows with lower thermal resistance. This external condensation can reduce visibility through the window, decrease owner satisfaction and affect the behaviour of window buyers and sellers. The purpose of this study was to analyse the impact of window U-value and other factors on the occurrence of external condensation. A combined heat and moisture transfer model was created and used for the calculations. According to the results, the duration and amount of external condensation are projected to increase in the future due to lower window U-values and climate change. Exterior surface emissivity, external shadings and building location had a big impact on the amount of yearly condensation hours, while window orientation and solar absorption coefficient had a smaller impact. There was also an interesting power-law-type correlation between yearly condensation hours and the median effective thickness of the condensation layer. The results help window manufacturers and building designers make more accurate decisions in their future work.",
keywords = "Building physics, Condensation, Energy efficiency, Heat transfer, Moisture transfer, Windows",
author = "Anssi Laukkarinen and Paavo Kero and Juha Vinha",
year = "2018",
month = "9",
day = "1",
doi = "10.1016/j.jobe.2018.06.014",
language = "English",
volume = "19",
pages = "592--601",
journal = "Journal of Building Engineering",
issn = "2352-7102",
publisher = "Elsevier BV",

}

RIS (suitable for import to EndNote) - Lataa

TY - JOUR

T1 - Condensation at the exterior surface of windows

AU - Laukkarinen, Anssi

AU - Kero, Paavo

AU - Vinha, Juha

PY - 2018/9/1

Y1 - 2018/9/1

N2 - New energy efficient windows have a higher risk for outdoor air vapour condensing to their exterior surface, when compared to older windows with lower thermal resistance. This external condensation can reduce visibility through the window, decrease owner satisfaction and affect the behaviour of window buyers and sellers. The purpose of this study was to analyse the impact of window U-value and other factors on the occurrence of external condensation. A combined heat and moisture transfer model was created and used for the calculations. According to the results, the duration and amount of external condensation are projected to increase in the future due to lower window U-values and climate change. Exterior surface emissivity, external shadings and building location had a big impact on the amount of yearly condensation hours, while window orientation and solar absorption coefficient had a smaller impact. There was also an interesting power-law-type correlation between yearly condensation hours and the median effective thickness of the condensation layer. The results help window manufacturers and building designers make more accurate decisions in their future work.

AB - New energy efficient windows have a higher risk for outdoor air vapour condensing to their exterior surface, when compared to older windows with lower thermal resistance. This external condensation can reduce visibility through the window, decrease owner satisfaction and affect the behaviour of window buyers and sellers. The purpose of this study was to analyse the impact of window U-value and other factors on the occurrence of external condensation. A combined heat and moisture transfer model was created and used for the calculations. According to the results, the duration and amount of external condensation are projected to increase in the future due to lower window U-values and climate change. Exterior surface emissivity, external shadings and building location had a big impact on the amount of yearly condensation hours, while window orientation and solar absorption coefficient had a smaller impact. There was also an interesting power-law-type correlation between yearly condensation hours and the median effective thickness of the condensation layer. The results help window manufacturers and building designers make more accurate decisions in their future work.

KW - Building physics

KW - Condensation

KW - Energy efficiency

KW - Heat transfer

KW - Moisture transfer

KW - Windows

U2 - 10.1016/j.jobe.2018.06.014

DO - 10.1016/j.jobe.2018.06.014

M3 - Article

VL - 19

SP - 592

EP - 601

JO - Journal of Building Engineering

JF - Journal of Building Engineering

SN - 2352-7102

ER -