太阳能相变储热系统对木材干燥速率的影响  

Influence of solar latent heat storage system on wood drying rate

作　　者：冯小江[1] 伊松林[1] 张璧光[1] 高建民[1] 

机构地区：[1]北京林业大学材料科学与技术学院,北京100083

出　　处：《华北电力大学学报（自然科学版）》2010年第3期79-83,87,共6页Journal of North China Electric Power University：Natural Science Edition

基　　金："十一五"国家科技支撑计划项目资助(2006BAD18B0802);教育部新世纪优秀人才支持计划(木材太阳能干燥相变储热系统特性及优化匹配的研究)

摘　　要：针对木材太阳能干燥间歇性的不足,在原有太阳能干燥装置的基础上,增设了多管道叉排石蜡相变储热系统,并在小型试验台上模拟了木材太阳能干燥过程。试验研究表明:该干燥装置中储热系统供风温度对木材干燥速率的影响最大,干燥速率随着供风温度的升高而增加,最大的差值达到0.29%/h。;其次是循环风速,随着循环风速的提高干燥速率先增大后减小,在风速为1.5 m/s时的干燥速率最高,为1.0%/h;而石蜡管的管排数对干燥速率几乎没有影响,不同管排数下最大的差值为0.05%/h。此装置最优的干燥条件为:石蜡管管排为9排,循环风速为1.5 m/s,供风温度为65℃,此条件下干燥速率可达1.06%/h。上述研究结果可为木材太阳能干燥设备储热系统的研发提供参考。Aiming at the shortage of intermission of wood solar drying,a paraffin latent heat storage system with fork row tubes was added to an original solar drying equipment and the wood solar drying process was simulated on a small test stand.Preliminary study showed that： the wood drying rate was largest affected by air supplying temperature of thermal storage system in the drying device.It increased with the air supplying temperature,the largest difference to 0.29%/h.Followed by the wind speed,the drying rate first increased and then decreased as wind speed increased.It was 1.0%/h in winds of 1.5 m/s,which was the highest.And the number of tube rows had no influence on the drying rate.The largest difference was 0.05%/h in different rows.The best drying conditions of this device were as follows： tube rows was 9 rows,wind speed was 1.5m/s,air supplying temperature was 65 ℃.The drying rate under this conditions was up to 1.06%/h.The study results provided reference for developing solar energy thermal storage system of wood drying equipment.

关 键 词：太阳能 相变储热 木材干燥 干燥速率 

分 类 号：TK513.5[动力工程及工程热物理—热能工程]