Center for Air Resources Engineering and Science, Clarkson University, Potsdam, NY, USA.
Institute for a Sustainable Environment, Clarkson University, Potsdam, NY, USA.
Ann Work Expo Health. 2018 Feb 13;62(2):248-252. doi: 10.1093/annweh/wxx104.
Wood pellets are increasingly used for space heating in the United States and globally. Prior work has shown that stored bulk wood pellets produce sufficient carbon monoxide (CO) to represent a health concern and exceed regulatory standards for occupational exposures. However, most of the pellets used for residential heating are sold in 40-pound (18.1 kg) plastic bags. This study measured CO emission factors from fresh, bagged-wood pellets as a function of temperature and relative humidity. CO concentrations increased with increasing temperature and moisture in the container. CO measurements in a pellet mill warehouse with stored pallets of bagged pellets had 8-h average CO concentrations up to 100 ppm exceeding occupational standards for worker exposure. Thus, manufacturers, distributors, and home owners should be aware of the potential for CO in storage areas and design facilities with appropriate ventilation and CO sensors.
木颗粒在美国和全球范围内越来越多地用于空间供暖。先前的研究表明，储存的散装木颗粒会产生足够的一氧化碳（CO），令人担忧健康，并超过职业暴露的监管标准。然而，用于住宅供暖的大多数颗粒是在 40 磅（18.1 公斤）塑料袋中出售的。本研究测量了新鲜袋装木颗粒在不同温度和相对湿度条件下的 CO 排放因子。CO 浓度随容器内温度和湿度的升高而增加。在装有袋装颗粒的托盘的颗粒厂仓库中进行的 CO 测量显示，8 小时平均 CO 浓度高达 100ppm，超过了工人接触的职业标准。因此，制造商、分销商和房主应该意识到储存区域存在 CO 的可能性，并设计具有适当通风和 CO 传感器的设施。
