旁通率对高温除湿干燥节能效果影响的研究  

Research on the Influences of Bypass Rate on Energy-saving Effect of High Temperature Dehumidification

作　　者：刘鑫钰[1] 高建民[1] 刘冬[2] 王天龙[1] 

机构地区：[1]北京林业大学木材科学与工程北京市重点实验室,北京100083 [2]北京语言大学人文学院,北京100083

出　　处：《安徽农业科学》2010年第17期9229-9230,9232,共3页Journal of Anhui Agricultural Sciences

基　　金："十一五"国家科技支撑计划项目(2006BAD18B0802)

摘　　要：[目的]确定木材除湿干燥各阶段的最佳旁通率,降低除湿比能耗。[方法]以杨木为试验材料,采用GGS-2/1除湿干燥机进行干燥试验,通过测定不同旁通率下的除湿率和除湿比能耗研究旁通率对高温除湿干燥节能效果的影响。[结果]杨木含水率在60%~25%阶段开启除湿机可达到节能效果。随着湿空气相对湿度减小,最小除湿比能耗对应的最佳旁通率增大。在干燥第一阶段,相对湿度为79%时,最佳旁通率为0.3,除湿比能耗达到最小值0.63 kW.h/kg;在干燥第二阶段,相对湿度为71%时,最佳旁通率为1,除湿比能耗达到最小值1.33 kW.h/kg;在干燥第三阶段,相对湿度为60%时,最佳旁通率为1.82,除湿比能耗达到最小值1.82 kW.h/kg。在选用的试验工况下,当旁通率达到最佳时,节能率为34%~58%。[结论]该研究为提高木材干燥效率提供了理论依据。[Objective]The purpose was to ascertain the optimum bypass rates in different stages of dehumidification of wood and decrease the specific energy consumption of dehumidification.[Method]With poplar wood as tested material,GGS-2/1 dehumidificator was used in the drying experiment.Through determining the dehumidification rates and specific energy consumptions of dehumidification under different bypass rates,the influences of bypass rates on the energy-saving effect of high temperature dehumidification were researched.[Result]Turning on dehumidificator when the water content in poplar wood was 60%-25% could achieve energy-saving effect.As the relative humidity of wet air was reduced,the corresponding optimum bypass rate of the least specific energy consumption of dehumidification was increased.In the 1st drying stage,when the relative humidity was 79%,the optimum bypass rate was 0.3 and the specific energy consumption of dehumidification reached its minimum of 0.63 kW·h/kg.In the 2nd drying stage,when the relative humidity was 71%,the optimum bypass rate was 1 and the specific energy consumption of dehumidification reached its minimum of 1.33 kW·h/kg.In the 3rd drying stage,when the relative humidity was 60%,the optimum bypass rate was 1.82 and the specific energy consumption of dehumidification reached its minimum of 1.82 kW·h/kg.Under selected experimental operating condition,when the bypass rate reached optimum,the energy-saving rate was 34%-58%.[Conclusion]This research supplied theoretical foundation for enhancing the drying efficiency of wood.

关 键 词：高温除湿干燥 旁通率 节能 杨木 

分 类 号：S782.31[农业科学—木材科学与技术]