摘要
根据霉菌生长的临界条件,在对墙体进行详细热湿性能分析的基础上,建立了木结构中最大可能霉菌生长指数模型。提出了基于预防霉菌生长的墙体最小热阻的确定方法。以长沙地区为例,分析了我国南方地区一种新型木结构墙体中胶木层的霉菌生长情况。结果表明,在靠近室内侧的表面,由于湿度过高引起霉菌大量生长。该墙体要在热湿气候地区推广应用需合理的设计室内产湿率和除湿率之间的平衡关系。
Based on the critical relative humidity and temperature conditions for mould growth and the detailed analysis of the hygrotherreal performance of wall, the largest possible mould growth model is established. The computational method of mould growth rate is also provided. According to the necessary conditions of mould growth, mould contamination control strategies is proposed. Traditional computational method of minimum thermal resistance is based on the condensation condition of interior surface and the problem of mould contamination is ignored. In this paper the determination method of minimum thermal resistance to prevent mould growth is proposed according to internal moisture production rate, air change rate, indoor and outdoor temperature. Taken Changsha region as an example, the status of mould growth on bakelite surfaces of a new timber structure wall under typical meteorological year is analyzed. The analysis results indicated that, due to the high humidity, a large number of mould growth is found on the surface close to indoor. Especially in April and May, south China is in rainy season and the values of the largest possible mould growth index at the interface between gypsum board and bakelite reach to 6. However, due to the relative humidity is always below 80% , there is no mould growth at the interface close to outdoer. The proper balance between indoor moisture generation and moisture removal should be designed and the minimum thermal resistance of wall should be larger than the calculation value using the method proposed in this paper to prevent mould growth when this kind of timber structure be popularized at hot-humid climate region.
出处
《安全与环境学报》
CAS
CSCD
北大核心
2010年第6期113-117,共5页
Journal of Safety and Environment
基金
国家自然科学基金项目(51078127)
高等学校博士学科点专项科研基金项目(20060532015)
关键词
供热
供燃气
通风及空调工程
霉菌污染
木结构
霉菌生长指数
热湿气候
临界相对湿度
heating, gas supply, ventilating and air conditroning engineering
mould contamination
timber structure
mould index
hot-humid climate
critical relative humidity
