提高喷淋室热湿交换效率的工程实践

Engineering practice for improving heat moisture exchange efficiency of spray chamber

为提高喷淋室热湿交换效率，对国内3种具有代表性的PX—I型、PY—I型和FD型喷嘴进行实验研究．运用回归分析法建立了3种喷嘴的流量与喷水压力、出口孔径之间的定量关系，并与仿LUwA等其他喷嘴进行了性能对比．分析结果指出，PX—I型喷嘴流量值和雾化性能最好．运行表明，选用PX—I型喷嘴代替LUWA喷嘴，全热交换效率提高51．7％，接触系数提高21．9％；通过喷淋排管改造，采用新型多功能纺织空调喷淋室，全热交换效率提高90．8％，接触系数提高26．4％。冷水温升达10.8℃；将空气流速由2．2m／s提高到5．5m／s，全热交换效率达1．154；与低速系统相比，送风量提高了0．9倍，水气比减少51．3％．

Experimental study on three kinds of typical nozzle （PX-I, PY-I, FD） are made for improving heat moisture exchange efficiency of spray chamber. Regression analysis is used for analysing the quantitative relationship among flow, spray pressure and export aperture. And compared with the performance of imitation LUWA nozzle and others. The results indicate that the PX-I spray nozzle has the best performance on flow rate value and fogging behavior. Running practice showed that using PX-I nozzle to replace the nozzle LUWA, total heat exchanger efficiency improve 51.7%, contact factor increased 21.9% ; reconstructed the spray pipes, and using a new multi-functional spray chamber in air-conditioning system in the textile mill, total heat exchanger efficiency improve 90. 8% , contact factor increased by 26.4% , and cold water temperature reached 10. 8℃ ; the air velocity from 2.2 m/s to 5.5 m/s, total heat exchange efficiency up to 1. 154. Compared with low-speed systems, the air supply increased by 0. 9 times, water-gas ratio decrease 51.3%.