非单向流洁净室换气次数的计算方法.PDF

第 45 卷 第 11 期 天 津 大 学 学 报 Vol.45 No.11 2012 年 11 月 Journal of Tianjin University Nov. 2012 ▋ 非单向流洁净室换气次数的计算方法 刘俊杰，尹维友，刘世超 (天津大学环境科学与工程学院，天津 300072) 摘 要 ：为减少洁净室能耗，提出了理论计算此类洁净室换气次数的新数学模型，新模型基于室内空气颗粒物输送 的模拟流程，室内气溶胶浓度计算考虑了换气次数、室内颗粒物散发量、过滤器效率、新风比和室外气溶胶浓度等 多个参数．将新的数学模型与以往的数学模型进行了对比，新的数学模型考虑了更多的环境参数和变量的影响，这 使得新的数学模型计算得出的换气次数更合理、更精确．采用敏感性分析的方法，评价了各个变量对洁净室洁净度 的影响大小．研究结果表明计算室内气溶胶浓度时考虑更全面的参数变量可以把洁净室的换气次数降到最小并满足 洁净室要求，从而有效降低洁净室的能耗． 关键词 ：换气次数；洁净室；非单向流；洁净度 中图分类号：TU8 文献标志码 ：A 文章编号 ：0493-2137 (2012)11-0987-07 Calculation Method of Air Change Rate of Non-Unidirectional Flow Cleanroom LIU Jun-jie ，YIN Wei-you ，LIU Shi-chao (School of Environmental Science and Engineering ，Tianjin University ，Tianjin 300072 ，China) To reduce the energy consumption of non-unidirectional airflow cleanrooms ，a mass-balance mathematic Abstract ： model was developed to calculate the appropriate air change rate in the cleanrooms．The model was parameterized to focus on a simulation-based interpretation of the indoor airborne particle transport processes ，and the airborne particle concentration was expressed as a function of several key parameters ，including air change rate ，internal particle gen- eration rate ，air filter efficiency, outdoor make-up air percentage and outdoor airborne particle concentration．A com- parison between the new model of indoor particle mass-balance and previous experiential ones was made．The calcu- lated air change rate is more reasonabl