摘要
针对矿井排风余热提取中的喷淋换热,其效率取值尚未见行业标准给予规定,是空白点.基于此,利用湿空气"火积"理论,推导出风侧喷淋换热前后湿空气"火积"及换热效率计算公式;以长沙市作为湿空气"火积"的逐时状态参考点,基于实验数据确定出空气侧的始末状态,利用所得的换热效率计算公式,量化了大气干球温度及含湿量对换热效率的影响,掌握了喷淋过程中换热效率数值的变化规律;最终,提出风侧换热效率可定为60%.所得结论,是直接喷淋式矿井排风能量提取及其预评估的重要参考依据.
For the spray heat transfer in the extraction of waste heat of mine exhaust, its efficiency value has not been specified in the industry standard, so it is a blank spot. Based on this, this paper uses the theory of entransy of wet air to deduce formulas for calculating entransy of wet air before and after spraying heat transfer and heat transfer efficiency in the spray heat exchange wind side. Changsha city is taken as the hourly reference point for the state of wet air entransy, and the initial and final states of the air side are determined by the experimental data. The influence of dry bulb temperature and moisture content on the heat transfer efficiency is quantified by using the obtained heat transfer efficiency calculation formula, and the change law of the heat transfer efficiency during the spraying process is mastered. Finally, the wind side heat transfer efficiency can be set as 60%. The conclusion is an important reference for extraction and pre-evaluation of direct spray mine exhaust energy.
作者
田峰
王海桥
方璐绮
樊思雨
蒋加川
刘锐鸿
TIAN Feng;WANG Haiqiao;FANG Luqi;FAN Siyu;JIANG Jiachuan;LIU Ruihong(School of Resources,Environment and Safety Engineering,Hunan University of Science and Technology,Xiangtan 411201,China;School of Civil Engineering,Hunan University of Science and Technology,Xiangtan 411201,China;Fankou Lead-Zinc Mine,Shenzhen Zhongjin Lingnan Non-ferrous Metal Company Limited,Shaoguan 512300,China)
出处
《矿业工程研究》
2021年第4期74-78,共5页
Mineral Engineering Research
基金
国家自然科学基金资助项目(51774134)
湖南省自然科学基金资助项目(2019JJ60044)。
关键词
矿井排风
余热
喷淋换热
换热效率
“火积”
the mine ventilation
waste heat
spray heat exchanger
efficiency of heat exchanging
entransy
