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Mattsson, Magnus and Broström, Tor and Linden, Elisabet and Lindström, Svante (2011) Fan Convectors vs. Bench heaters in Churches – impact on air velocities. In: EEHB 2011: Conference on Energy Efficiency in Historic Buildings, 2011, Visby, Sweden.


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Air movements in churches affect the deposition rate of airborne particles on surfaces, and hence influence soiling of valuable artifacts of different kinds. Sooting from candles and the thermal comfort of people is also affected by indoor air velocities. In an experimental field study, two different heating systems were compared regarding their effect on room air velocities in a church: air-to-air heat pumps with indoor fan convectors vs. a combination of bench heaters and radiators. Hot-sphere and 3-D sonic anemometers were used to record air velocities in the church. Strong buoyant air flows were found both in the supply air flow path of the heat pumps and above the bench heaters, but the air velocities were rather low outside of these air currents. A ~25 cm thick downdraught air flow was found along walls and windows, with a magnitude that was similar at both heating systems and much larger than the outdoor air infiltration rate.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Churches, Air velocities, Heating system, Heat pump, Surface soiling
Subjects: English
English > Damage functions > Soiling
Depositing User: Susanna Carlsten
Date Deposited: 14 May 2020 14:05
Last Modified: 14 May 2020 14:05

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