Abstract
Compared with variable air volume (VAV) system, the ceiling radiant cooling panel (CRCP) system integrated with displacement ventilation (DV) has better thermal comfort and excellent energy-saving potential. As a result, CRCP/DV has been paid more attention and used widely in advanced buildings in recent years. However, the indoor air quality (IAQ) under the above-mentioned system still needs to be tested. Firstly, this article studies two zones stratified by ventilation system in a room. Between the two zones is a transitional area called as stratified boundary which divides a room into two spaces with totally different air quality. It is analyzed that there are three important factors that decide the height of the stratified boundary. Secondly, the paper uses an office room as an example studied numerically. To simulate this room, a numerical model using finite volume method for CRCP/DV is created based on computational fluid dynamics (CFD). The objective of this model is to research contaminant removal efficiency of active contaminants (as indicated by CO2) concentration and passive contaminants (as indicated by VOCs) concentration under CRCP/DV. As a consequence, it is found that contaminant removal efficiency of active contaminants performs well while that of passive contaminants is poor. At last, this paper analyzes the cause and proposes an optimal control strategy to improve IAQ. This research can provide guidance for the buildings with CRCP/DV demanding high IAQ.
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Acknowledgments
This work is supported in part through the Scientific Research Fund of the National Natural Science Funds Projects (51178169).
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© 2014 Springer-Verlag Berlin Heidelberg
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Du, J., Li, N. (2014). Study on Indoor Air Quality of Ceiling Radiant Cooling Panel System Integrated with Displacement Ventilation. In: Li, A., Zhu, Y., Li, Y. (eds) Proceedings of the 8th International Symposium on Heating, Ventilation and Air Conditioning. Lecture Notes in Electrical Engineering, vol 261. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-39584-0_56
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DOI: https://doi.org/10.1007/978-3-642-39584-0_56
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