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2014 | OriginalPaper | Buchkapitel

7. Air Distribution and Ventilation Effectiveness in a Room with Floor/Ceiling Heating and Mixing/Displacement Ventilation

verfasst von : Xiaozhou Wu, Lei Fang, Bjarne W. Olesen, Jianing Zhao

Erschienen in: Proceedings of the 8th International Symposium on Heating, Ventilation and Air Conditioning

Verlag: Springer Berlin Heidelberg

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Abstract

The present study investigated different combinations of floor/ceiling heating with mixing/displacement ventilation and their impacts on the indoor air distribution and ventilation effectiveness. Measurements were performed in a room during heating season in December. The results show that indoor vertical air temperature differences and air velocities for different hybrid systems are less than 3 °C and 0.2 m/s when supply air temperature is 19 °C, air change rate is 4.2 h−1, and heated surface temperature of floor/ceiling heating system is 25 °C. Ventilation effectiveness of mixing ventilation system combined with floor/ceiling heating systems is approximately equal to 1.0, and ventilation effectiveness of displacement ventilation system combined with floor/ceiling heating systems ranges from 1.0 to 1.2. The floor/ceiling heating systems combined with mixing ventilation system have more uniform indoor air distribution but smaller ventilation effectiveness compared with the floor/ceiling heating systems combined with displacement ventilation system. With regard to the building heat loss increased by non-uniform indoor air distribution and small ventilation effectiveness, there should be an optimal combination of floor/ceiling heating with mixing/displacement ventilation to have the minimal building heat loss.

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Metadaten
Titel
Air Distribution and Ventilation Effectiveness in a Room with Floor/Ceiling Heating and Mixing/Displacement Ventilation
verfasst von
Xiaozhou Wu
Lei Fang
Bjarne W. Olesen
Jianing Zhao
Copyright-Jahr
2014
Verlag
Springer Berlin Heidelberg
DOI
https://doi.org/10.1007/978-3-642-39584-0_7