一种自汲水蒸发冷却器及其关键材料制备

A self-extracting water evaporative cooler and its key material preparation

针对蒸发冷却机组高效紧凑化需求,提出一种小型自汲水间接蒸发冷却器结构,并对关键湿面材料的制备和性能进行试验研究。PAN-SiO_(2)导湿纤维采用静电纺丝工艺制造,在20%浓度前驱体溶液中添加SiO_(2)驻极体,使其综合性能达到最优,其中,芯吸速率相比普通腈纶材料提高了250%,湿扩散速率提高了569%,蒸发速率提高了129%。在标准焓差室环境下,通过试验研究了样机性能及入口参数的影响规律。结果表明,进口干、湿球温度为40,21.8℃,风速为1.0 m/s时,湿球效率达到82.6%,能效比达到10.1;通过新型材料自汲补水的结构,取代了常规间接蒸发冷却设备中的重要耗能水泵设备,在保证制冷效率的前提下大大降低了机组能耗,可为蒸发冷却机组小型化探索提供参考。

In response to the highest efficiency and compactness requirements of evaporative cooling units,a small self-extracting indirect evaporative cooling structure was proposed,and experimental research was conducted on the preparation and performance of key wet surface materials.PAN-SiO_(2) moisture conducting fibers are manufactured using electrospinning technology,and SiO_(2) electrets are added to a 20%concentration precursor solution to achieve optimal comprehensive performance.The core absorption rate is increased by 250%compared to ordinary acrylic materials,the wet diffusion rate is increased by 569%,and the evaporation rate is increased by 129%.The influence of prototype performance,and inlet parameters was experimentally studied in a standard enthalpy difference chamber environment.The results show that when the inlet dry/wet bulb temperature is 40,21.8℃and the wind speed is 1.0 m/s,the wet bulb efficiency reaches 82.6%and the energy efficiency ratio reaches 10.1.By using self-extracting water replenishment structure of a new type of material,the important energy consuming water pump equipment in conventional indirect evaporative cooling equipment was replaced,which greatly reduces the energy consumption of the unit while ensuring refrigeration efficiency.This can provide a reference for the exploration of miniaturization of evaporative cooling units.