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首页> 外文期刊>Wood and Fiber Science >MOISTURE AND TEMPERATURE CHANGES OF WOOD DURING ADSORPTION AND DESORPTION PROCESSES
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MOISTURE AND TEMPERATURE CHANGES OF WOOD DURING ADSORPTION AND DESORPTION PROCESSES

机译：木材在吸附和脱附过程中的水分和温度变化

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摘要

Sitka spruce (Picea sitchensis Can.) specimens, 10 mm along the grain and 20 mm in radial and tangential directions, were exposed to three different RH conditions of 22, 47, and 75% for adsorption and desorption at 30 degrees C controlled by a self-designed temperature conditioning chamber. Specimen weight was measured and thermal images were taken at certain time intervals during the processes to investigate their moisture and temperature changes. Results showed that at the beginning of the sorption process, moisture content of the specimens changed significantly and their average temperature increased about 2-7 degrees C for adsorption and decreased about 1-6 degrees C for desorption. During adsorption, the temperature for the center section along the longitudinal direction of the specimens was lower than that for the surface section, whereas the opposite was true for specimens under desorption. Along with the adsorption and desorption processes, moisture content and average temperature of the specimens were gradually approaching equilibrium state.
机译：锡特卡云杉（Picea sitchensis Can。）标本沿晶粒长10毫米，径向和切线方向分别长20毫米和20％，分别暴露于22、47和75％的三种相对湿度条件下，在30摄氏度下受吸附控制。自行设计的温度调节室。测量样品重量并在过程中以一定的时间间隔拍摄热图像，以研究其湿度和温度变化。结果表明，在吸附过程开始时，样品的水分含量发生了显着变化，其平均温度在吸附时升高约2-7摄氏度，在解吸时降低约1-6摄氏度。在吸附过程中，沿样品纵向的中央部分的温度低于表面部分的温度，而在解吸条件下样品的温度则相反。随着吸附和解吸过程，样品的含水量和平均温度逐渐接近平衡状态。

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