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首页> 外文期刊>International Agricultural Engineering Journal >Effects of moisture change on the physical and thermal properties of sericea lespedeza pellets.
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Effects of moisture change on the physical and thermal properties of sericea lespedeza pellets.

机译：水分变化对水芹叶片的物理和热学性质的影响。

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摘要

The bulk density, unit density, porosity, hardness, gross calorific value, thermal conductivity, thermal diffusivity, and specific heat at different moisture content were determined for sericea lespedeza (SL, Lespedeza cuneata) pellets. It was observed that most physical properties of the SL pellets were significantly affected by moisture contents varying from 7.26% to 15.55% wet mass basis (w.b.). The maximum values of bulk density and unit densities were 547.72 and 1101.74 kg/m3, respectively. At higher moisture content (m.c), there was a decrease in pellet hardness from 196.64 N at 7.26% m.c. to 68.76 N at 15.55% m.c. Gross calorific value decreased with increase in moisture content from 18.02 MJ/kg at 7.26% m.c. to 16.54 MJ/kg at 15.55% m.c. Over a moisture range of 7.26% to 15.55%, thermal conductivities, thermal diffusivities, and specific heats of the SL pellets were in the range of 0.030 to 0.033 W m-1 degrees C-1, 2.02x10-7 m2/s to 2.18x10-7 m2/s, and 260.14 kJ/kg degrees C to 314.85 kJ/kg degrees C, respectively. The thermal conductivity and thermal diffusivity values of SL pellets were not significantly affected by change in moisture content.
机译：测定了Sericea lespedeza（SL， Lespedeza cuneata ）颗粒的堆积密度，单位密度，孔隙率，硬度，总热值，热导率，热扩散率和比热。观察到SL粒料的大多数物理性能受到湿含量（湿重基础）（7.26％至15.55％）的显着影响（w.b.）。堆积密度和单位密度的最大值分别为547.72和1101.74 kg / m 3 。在较高的水分含量（m.c）下，颗粒硬度从7.26％的m.c下的196.64 N降低。在15.55％m.c下达到68.76 N总热量值随着水分含量的增加而降低，从18.02 MJ / kg在7.26％m.c.在15.55％的m.c下达到16.54 MJ / kg在7.26％至15.55％的湿度范围内，SL颗粒的热导率，热扩散率和比热为0.030至0.033 W m -1 摄氏度C -1 ，2.02x10 -7 m 2 / s到2.18x10 -7 m 2 / s分别为260.14 kJ / kg摄氏度和314.85 kJ / kg摄氏度。水分含量的变化不会显着影响SL颗粒的导热系数和热扩散系数。

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