Wood pellets have become a renewable substitute for coal in heat and power generation facilities. However, the hygroscopic nature of wood pellets is a long-standing problem in handling this product. Pellets may become wet during loading and unloading if a rain incident happens. In this research, three types of commercial wood pellets were exposed to liquid water. The durability, density, and porosity of pellets before and after wetting were measured. The commercial pellets were residential hardwood, residential softwood, and industrial softwood pellets. Predetermined volumes of water were added to increase the moisture contents of pellets to several levels ranging from 1.5 to 30% wet mass basis (wb). Exposure to liquid water caused localized swelling of pellets which dislodged particles from the surface of pellets. The data showed when moisture content (m.c.) increased to 10% wb, the pellet durability dropped from 99.5% to 97.5%. A slight increase in bulk density from an initial 690 kg/m³ was observed for pellets at 6–7% m.c (wb). The bulk density decreased to 500 kg/m³ when the adsorbed moisture was at 15% wb.

木质颗粒已成为热力和发电设备中煤炭的可再生替代品。但是，木质颗粒的吸湿性是处理该产品时的长期问题。如果发生下雨事故，则颗粒在装卸过程中可能会变湿。在这项研究中，将三种类型的商品木屑颗粒暴露于液态水。测量了润湿前后的颗粒的耐久性，密度和孔隙率。商业颗粒是住宅硬木，住宅软木和工业软木颗粒。加入预定体积的水以将粒料的水分含量增加至1.5至30％湿重基础（wb）的几个水平。暴露于液态水会导致药丸局部溶胀，从而使药丸从药丸表面脱落。数据显示，当含水量（mc）增加到10％wb时，颗粒的耐久性从99.5％下降到97.5％。最初的690 kg / m的堆积密度略有增加在6–7％mc（wb）下观察到^3个颗粒。当吸附的水分为15％wb时，堆积密度降低至500kg / m ³。