Numerical study of the influence of the atmospheric pressure on the heat and mass transfer rates of desiccant wheels
Numerical study of the influence of the atmospheric pressure on the heat and mass transfer rates of desiccant wheels
复制标题
大气压力对干燥轮传热传质速率影响的数值研究
DOI：
10.1016/j.ijheatmasstransfer.2010.12.008
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
A. Figueiredo
中科院分区：
文献类型：
--
作者：
C. Ruivo;J. Costa;A. Figueiredo
进行了一项研究，以调查 101,325 至 60,000Pa（对应于 0 至 4217m 海拔）的大气压对干燥剂轮（硅胶 RD 吸湿基质）的传热和传质速率的影响，假设工艺和再生气流具有固定质量气流速率和固定入口状态，由各自的入口温度和水蒸气定义 内容。结果表明，随着大气压力的降低，传热和传质速率普遍降低，这种效应对于短通道轮和高气流速率更为明显。提出了基于数值结果的相关性，用于校正干燥剂轮在非标准大气压下运行时的传热和传质速率。
A study was conducted to investigate the influence of the atmospheric pressure, from 101,325 to 60,000Pa (corresponding from 0 to 4217m of altitude), on the heat and mass transfer rates of desiccant wheels (hygroscopic matrix of silica gel RD), assuming fixed-mass airflow rates and fixed inlet states for the process and regeneration airflows, defined by the respective inlet temperatures and water vapour contents. The results show a generic reduction of the heat and mass transfer rates as the atmospheric pressure decreases, an effect that is more pronounced for short channel wheels and high airflow rates. Correlations based on the numerical results are presented for the correction of the heat and mass transfer rates when the desiccant wheels are operating at non-standard atmospheric pressure.