具有预凝功能的新型热源塔的构建及模拟  

Construction and simulation of new-type heat-source tower with pre-condensation function

作　　者：夏燚[1,2] 孙立镖 梁彩华[1] 张小松[1] 

机构地区：[1]东南大学能源与环境学院,南京210096 [2]南京师范大学能源与机械工程学院,南京210046

出　　处：《东南大学学报（自然科学版）》2015年第6期1108-1113,共6页Journal of Southeast University：Natural Science Edition

基　　金："十二五"国家科技支撑计划资助项目(2011BAJ03B14);国家自然科学基金重点资助项目(51036001)

摘　　要：针对现有开式热源塔冬季运行时塔内溶液吸湿量大从而影响系统安全运行的问题,提出了一种具有预凝功能的新型热源塔结构.对该新型塔的运行过程进行了理论分析,在对横流热源塔和翅片盘管进行建模和实验验证的基础上,进一步构建了新型塔的数学模型,并对比研究了新型塔和普通塔在不同环境湿度下的传热传质特性.结果发现,随着环境湿度由90%降低到60%,新型塔的换热量相比于普通塔增加了10.9%~12.5%,吸湿量减少了55.2%~76.3%,且随着环境湿度的增加,新型塔吸湿量的增加速率更为缓慢.当环境湿度为40%时,溶液处于再生工况,新型塔的再生量增加了64.3%,证明了新型塔在缓解热源塔内溶液吸湿问题有明显的优势.Due to the fact that the existing open heat-source tower has high moisture absorption rate in winter affecting the safety of system, a new-type heat-source tower structure with pre-condensation function is proposed. The operation process of the new-type tower is analyzed. The mathematical model of the new-type tower is constructed on the basis of the modelling of cross-flow tower and finned coil which is validated. Comparative simulation on heat and mass transfer characteristics of the new-type tower and ordinary tower are conducted under different ambient humidities. The results show that compared to the ordinary tower, the new-type tower＇ s heat exchange rate increases by 10. 9% to 12. 5% as the ambient humidity decreases from 90% to 60%, meanwhile moisture absorption rate decreases from 55.2% to 76.3%. With the increase of ambient humidity, the moisture absorption rate of new-type tower increases more slowly. When the ambient humidity is 40%, the new-type tower＇ s regeneration rate increases by 64.3 %. It is proved that the new-type tower has ob- vious advantages on relieving the problem of moisture absorption.

关 键 词：热源塔 传热传质 预凝功能 模型建立 

分 类 号：TK121[动力工程及工程热物理—工程热物理]