Short-time solutions to diffusion-controlled emissions of volatile organic compounds
- 作者：LI MinLAI Chi-Keung Alvin
- 会议时间：2012-11-16
- 关键词：diffusion-controlled organic emission ; volatile organic compounds ; formaldehyde ; environmental-chamber test ; short-time solution
- 作者单位：Department of Civil and Architectural Engineering, City University of Hong Kong
- 母体文献：中国环境科学学会室内环境与健康分会第五届年会论文集
- 会议名称：中国环境科学学会室内环境与健康分会第五届年会
- 会议地点：长沙
- 主办单位：中国环境科学学会
- 语种：chi
摘要
Short-time solution is derived for diffusion-controlled emissions of volatile organic compounds. Compared to commonexact series solutions, simplified short-time solution not only converges fast at short times but also has simple forms requiring noroots of transcendental equations. It serves necessary complements to the exact series solution. Especially interesting is a straight-linerelation between air-phase concentration and 1/√t (t is time), which is derived from the small-time solution and is very suitable forsome mid-stage between the very early and the late emission stages. This simplest mathematical relation is the most desirable forengineering applications. These new expressions are validated by using a reported environmental-chamber tests. Since all derivationhas a solid mathematical-physics basis, the models presented in this paper may contribute to casting new light on the underlyingmechanisms of diffusion-limited organic emissions.