采用不锈钢波纹填料,基于空气闭式-水开式循环建立加湿模型,通过实验研究喷淋加湿过程中喷淋速率、喷淋温度、填料高度、循环风速等参数对热湿交换效果的影响。结果表明：对于喷淋加湿过程,总传质系数受到填料高度的明显制约,当填料高度达45 cm以上时,喷淋水温对加湿过程起主导作用。当填料高度不变时,喷淋速率存在最优值,且随喷淋温度的降低而增大,但总体上对传质系数的影响较弱。对填料压降的分析表明,填料高度和喷淋速率的增大都会增大压降,在填料高度大于45 cm以后,综合因子变化平稳。
Abstract
It is a necessary means to strengthen heat and moisture exchange by using porous packing to increase the water vapor contact interface in spray humidification process. In this paper, a humidification model based on air closed-water open cycle was established by using stainless steel corrugated packing, the effects of spraying rate, spraying temperature, packing height and circulating air velocity on heat and moisture exchange are studied. The results show that the total mass transfer coefficient is obviously restricted by the packing height. When the packing height is over 45cm, the spray water temperature plays a dominant role in the process. In addition, when the packing height is constant, the spray rate has an optimal value which increases with the decrease of spray temperature, but the overall effect on mass transfer coefficient is weak. The analysis of packing pressure drop shows that the increase of packing height and spray rate will increase the pressure drop, when the packing height is more than 45cm, the change of comprehensive factor is stable.
关键词
太阳能海水淡化 /
喷淋 /
波纹填料 /
加湿除湿 /
总传质系数 /
焓变
Key words
solar desalination /
spray /
corrugated packing /
humidification and dehumidification /
total mass transfer coefficient /
enthalpy change
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基金
国家自然科学基金（52006013）; 国家资助博士后研究人员计划（GZB20230933）
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