文章基本信息

标题：A study on condensation simulation for a building integrated with a capillary ceiling HVAC system
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作者：Ma, Jianchao ; Ahmad, Waqar ; Chen, Jiufa 等
期刊名称：Intl Jnl of Low-Carbon Technologies
印刷版ISSN：1748-1317
电子版ISSN：1748-1325
出版年度：2019
卷号：14
期号：2
页码：256-266
DOI：10.1093/ijlct/ctz001
出版社：Oxford University Press
摘要：The condensation of capillary ceiling embedded with capillary radiant network (CRN) was simulated. Two types of condensation in capillary ceiling will be produced (i.e. surface and internal condensation of the enclosure). Temperature, humidity distribution and condensation of ceiling in both summer and winter were studied based on principle of coupled heat and moisture transfer. The effect of Expanded Polystyrene (EPS) insulation board thickness has been carefully analyzed. In summer, the thickness of EPS must be greater than 10 mm to avoid wall surface condensation. If the thickness of EPS exceeds 20 mm, the surface relative humidity could be reduced to below 95%. In winter, in order to prevent the ceiling condensation at the internal interface between EPS and concrete, the thickness of EPS should better be less than 20 mm or more than 45 mm. Considering the fact that no condensation occurs within the 30 days in summer and winter, the thickness of the EPS should be greater than 45 mm. The results indicate that even if no condensation occurs on the surface of the capillary ceiling, the risk of internal condensation still exists, especially in winter. Increasing thickness of EPS can reduce the possibility of the radiant ceiling condensation.
关键词：capillary radiant network; capillary ceiling; internal condensation