Plum rain-season-oriented modelling and intervention of indoor humidity with and without human occupancy

被引：0
作者：
Ye J. [1 ]
Qian H. [1 ]
Zheng X. [1 ]
Cao G. [2 ]
机构：
[1] School of Energy and Environment, Southeast University, Nanjing
[2] Institute of Building Environment and Energy efficiency, China Academy of Building Research, Beijing
来源：
Atmosphere | 2019年 / 10卷 / 02期
基金：
国家重点研发计划;
关键词：
High humidity climate; Human occupancy; Indoor air RH; Mold prevention; Plum rain season;
D O I：
10.3390/ATMOS10020097
中图分类号：
学科分类号：
摘要：
The plum rain season, caused by precipitation along a persistent stationary Mei-Yu front in East Asia, creates favorable temperatures and relative humidity (RH) for mold growth indoors. This paper investigates the effects of human occupancy on indoor humidity and investigates the efficient RH reduction methods to prevent mold growth in moist climates. The research is carried out based on a case study which compares a family-occupied home and another unoccupied one during typical plum rain season in Nanjing. Firstly, by analyzing the factors that can influence the indoor air RH, this paper develops a comprehensive model to evaluate the efficiency of various RH intervention methods. Secondly, this paper collects the meteorological data in Nanjing at different time scales, from days to hours. Thirdly, a specific case study is carried out based on the model and data. The results show that dehumidification and heating can always reduce RH below the critical value under which the mold growth could be inhibited. However, the effects of ventilation are more sophisticated and depend upon the human occupancy, outdoor air temperature, and air change per hour (ACH). In certain unoccupied cases, the ventilation may be inappropriate and may continuously bring moisture outside into the indoor environment, which has adverse effects on mold suppression. In the occupied cases, the condition changes significantly because the human is deemed as an internal source of heat and moist. Special care should be exercised for occupied ventilation in order to determine the optimal ACH and appropriate outdoor temperatures. Finally, some guidance is given to prevent mold growth in the general area that suffers from the plum rain season. © 2019 by the authors.
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  • [1] He H., Lee H., Yangtze floods recorded on Mt Mufu and Swallow Cliff in Nanjing, China, Geomatics. Nat. Hazards Risk, 8, pp. 905-917, (2017)
  • [2] Lotz W.A., Moisture problems in buildings in hot humid climates, ASHRAE J, 31, pp. 26-27, (1989)
  • [3] Dearborn D.G., Yike I., Sorenson W.G., Miller M.J., Etzel R.A., Overview of investigations into pulmonary hemorrhage among infants in Cleveland, Ohio, Environ. Health Perspect, 107, pp. 495-499, (1999)
  • [4] Menetrez M.Y., Foarde K.K., Emission exposure model for the transport of toxic mold, Indoor Built Environ, 13, pp. 75-82, (2004)
  • [5] Mussalorauhamaa H., Nikulin M., Koukilakahkola P., Hintikka E.L., Malmberg M., Haahtela T., Health effects of residents exposed to Stachybotrys in water-damaged houses in Finland, Indoor Built Environ, 19, pp. 476-485, (2010)
  • [6] Gutarowska B., Kosmowska M., Wiszniewska M., Palczynski C., Walusiak-Skorupa J., An investigation of allergenic proteins produced by moulds on building materials, Indoor Built Environ, 21, pp. 253-263, (2012)
  • [7] Mendell M.J., Mirer A.G., Cheung K., Tong M., Douwes J., Respiratory and allergic health effects of dampness, mold, and dampness-related agents: a review of the epidemiologic evidence, Environ. Health Perspect, 119, (2011)
  • [8] Sharpe R.A., Le Cocq K., Nikolaou V., Osborne N.J., Thornton C.R., Identifying risk factors for exposure to culturable allergenic moulds in energy efficient homes by using highly specific monoclonal antibodies, Environ. Res, 144, pp. 32-42, (2016)
  • [9] Viitanen H., Improved model to predict mold growth in building materials, Proceedings of the Thermal Performance of the Exterior Envelopes of Whole Buildings X, (2007)
  • [10] Isaksson T., Thelandersson S., Ekstrand-Tobin A., Johansson P., Critical conditions for onset of mould growth under varying climate conditions, Build. Environ, 45, pp. 1712-1721, (2010)
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