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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.
Aiming at the problem that the existing open-type heat source tower has a large moisture absorption in the tower during winter operation and thus affects the safe operation of the system, a new type of heat source tower structure with pre-condensation function is proposed. Theoretical analysis is made on the operation of the new tower, Based on the modeling and experimental verification of the cross-flow heat source tower and finned coil, the mathematical model of the new tower is further constructed and the heat and mass transfer characteristics of the new tower and ordinary tower under different environmental humidity are compared. The results showed that as the ambient humidity decreased from 90% to 60%, the heat exchange capacity of the new tower increased by 10.9% ~ 12.5% compared with the conventional tower, and the moisture absorption decreased by 55.2% ~ 76.3%. With the increase of environmental humidity When the ambient humidity is 40%, the solution is in regeneration condition, the new tower regeneration rate increased by 64.3%, proved that the new tower in the solution to solve the problem of moisture absorption in the heat source tower obvious advantage.