流体机械

2020, v.48;No.573(03) 83-88

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露点蒸发冷却器■效率分析
Efficiency Analysis of Dew-point Evaporative Cooler

徐鹏;韩泽敏;熊亚选;郑小兵;
Xu Peng;Han Zemin;Xiong Yaxuan;Zheng Xiaobing;Key Laboratory of HVAC,Beijing University of Civil Engineering and Architecture;Beijing Equipment Installation Company;

摘要(Abstract):

为了从能的"量"和"质"两方面评价露点蒸发冷却器的能源利用率,以热力学第二定律为理论基础,采用■分析法研究了进气温度、气流速度、相对湿度对该冷却器干湿通道内热能■、化学■、机械■的分布、变化以及■效率的影响。结果表明:该冷却器的效■率随着进气温度的升高,由10.6%增大到36.7%;随着进气相对湿度的增大,由21.8%降低到9.5%;随着气流速度的增大,由18.2%下降到9.1%。通过研究不同情况下的■效率可知该冷却器仍有很大的节能潜力,结合■效率可以清楚地知道露点蒸发冷却器节能的薄弱环节,从而找出减少能源损失的方法。
In order to evaluate the energy utilization rate of the dewpoint evaporative cooler from the"quantity" and "quality"of energy,based on the second law of thermodynamics,the influence of inlet temperature,airflow velocity and relative humidity on the distribution and variation of thermal exergy,chemical exergy,mechanical exergy,and exergy efficiency in the wet and dry channels of the cooler was studied by exergy analysis.The results show that the exergy efficiency of the cooler was increased from 10.6% to 36.7% with the increase of the intake air temperature,and decreased from 21.8% to 9.5% with the increase of the relative humidity of the intake air and decreased from 18.2% to 9.1% with the increase of the airflow velocity.By studying the exergy efficiency under different conditions and in combination with the exergy efficiency,it is known the cooler still has a great potential of energy saving,and the weak point of energy saving of the dewpoint evaporative cooler can be clearly known,thereby a method for reducing energy loss can be found.

关键词(KeyWords): 露点蒸发冷却器;热能■;化学■;机械■;■效率
dewpoint evaporative cooler;thermal exergy;chemical exergy;mechanical exergy;exergy efficiency

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作者(Author): 徐鹏;韩泽敏;熊亚选;郑小兵;
Xu Peng;Han Zemin;Xiong Yaxuan;Zheng Xiaobing;Key Laboratory of HVAC,Beijing University of Civil Engineering and Architecture;Beijing Equipment Installation Company;

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