摘要
通过对真空干燥过程中过饱和蒸汽形成机理的介绍,运用人工降雨的原理,提出了在真空干燥过程中通过向干燥箱内通入凝结核,能让真空干燥箱内过饱和蒸汽由不可能凝结的同质核化转换为容易凝结的异质核化,从而将水蒸汽凝结时释放的潜热重新利用的设想。运用相关理论,对真空干燥过程中理论节能率进行计算,得到干燥1m3杉木(含水率从60%～10%)可以节约75.074W的能量,理论节能率为45.3%。
Through the introduction of the formation mechanism of supersaturated steam during vacuum drying process of wood, using the principle of precipitation, a hypothesis was put forward that if the condensation nucleus were put in the vacuum kiln, the supersaturated steam can be transformed into droplets by heterogeneous-nucleation other than homogenous-nucleation that always happen during wood vacuum drying and release its latent heat that could be reused. Using the related theories, the theoretical energy-saving rate during the vacuum drying process was calculated. It was concluded that 75. 074 W energy could be saved during the drying of 1 m3 fir （water content of 60% - 10% ）and the theoretical energy-saving rate was 45.3%.
出处
《安徽农业科学》
CAS
北大核心
2010年第24期13266-13268,共3页
Journal of Anhui Agricultural Sciences
基金
国家自然基金项目(30871978)
关键词
真空干燥
过饱和蒸汽
汽化潜热
节能率
水蒸气异质核化
Vacuum drying
Supersaturated steam
Latent heat of vaporization
Energy-saving rate
Vapor heterogeneous-nucleation
