Berman Bryan, Cummings Bryan, Guo Hongyu, Campuzano-Jost Pedro, Jimenez Jose, Pagonis Demetrios, Day Douglas, Finewax Zachary, Handschy Anne, Nault Benjamin A, DeCarlo Peter, Capps Shannon, Waring Michael
Department of Civil, Architectural and Environmental Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United States.
Department of Chemistry and Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado, Boulder, Boulder, Colorado 80309, United States.
ACS EST Air. 2024 Sep 3;1(9):1084-1095. doi: 10.1021/acsestair.4c00060. eCollection 2024 Sep 13.
In 2018, the ATHLETIC campaign was conducted at the University of Colorado Dal Ward Athletic Center and characterized dynamic indoor air composition in a gym environment. Among other parameters, inorganic particle and gas-phase species were alternatingly measured in the gym's supply duct and weight room. The Indoor Model of Aerosols, Gases, Emissions, and Surfaces (IMAGES) uses the inorganic aerosol thermodynamic equilibrium model, ISORROPIA, to estimate the partitioning of inorganic aerosols and corresponding gases. In this study herein, measurements from the ATHLETIC campaign were used to evaluate IMAGES' performance. Ammonia emission rates, nitric acid deposition, and particle deposition velocities were related to observed occupancy, which informed these rates in IMAGES runs. Initially, modeled indoor inorganic aerosol concentrations were not in good agreement with measurements. A parametric investigation revealed that lowering the temperature or raising the relative humidity used in the ISORROPIA model drove the semivolatile species more toward the particle phase, substantially improving modeled-measured agreement. One speculated reason for these solutions is that aerosol water was enhanced by increasing the RH or decreasing the temperature. Another is that thermodynamic equilibrium was not established in this indoor setting or that the thermodynamic parametrizations in ISORROPIA are less accurate for typical indoor settings. This result suggests that applying ISORROPIA indoors requires further careful experimental validation.
2018年，“运动环境空气特征研究（ATHLETIC）”项目在科罗拉多大学达尔沃德运动中心开展，旨在描绘体育馆环境中的动态室内空气成分。除其他参数外，还对体育馆的送风管道和力量训练室中的无机颗粒物和气相物质进行了交替测量。气溶胶、气体、排放物及表面室内模型（IMAGES）使用无机气溶胶热力学平衡模型ISORROPIA来估算无机气溶胶及其相应气体的分配情况。在本研究中，利用“运动环境空气特征研究（ATHLETIC）”项目的测量数据来评估IMAGES的性能。氨排放率、硝酸沉降和颗粒物沉降速度与观察到的人员活动情况相关，这些数据为IMAGES运行中的这些速率提供了参考。最初，模拟的室内无机气溶胶浓度与测量值不太吻合。一项参数研究表明，降低ISORROPIA模型中使用的温度或提高相对湿度会使半挥发性物质更多地趋向颗粒相，从而显著改善模拟值与测量值的吻合度。对于这些解决方案，一种推测的原因是，增加相对湿度或降低温度会增强气溶胶中的水分。另一个原因是，在这种室内环境中未建立热力学平衡，或者ISORROPIA中的热力学参数化对于典型的室内环境不太准确。这一结果表明，在室内应用ISORROPIA需要进一步进行仔细的实验验证。
