[关键词]
[摘要]
为了在AMESim中对湿态空气循环进行工程计算,在AMESet中使用析湿系数法编写了湿态换热器模型。对某换热器设计5种实验工况:热边/冷边的流量、压力和进口温度分别动态稳定在2 200 kg/h,2 100 kg/h,1.16 MPa,0.13 MPa,81.5 ℃,-17.5 ℃,冷边绝对湿度8 g/kg,热边绝对湿度分别为22 g/kg、20 g/kg、18 g/kg、14 g/kg和10 g/kg。测得热、冷边出口温度以及温差效率,并使用湿态换热器模型计算温差效率。研究表明:湿态换热器模型的温差效率误差在4%以内,相对误差在10%以内,满足工程需求;热边绝对湿度从1 g/kg增加到30 g/kg,计算的温差效率下降缓慢,在翅片形成液膜后温差效率下降迅速,符合实际情况。
[Key word]
[Abstract]
In order to calculate the wet air circulation in AMESim,a model of wet heat exchanger was designed in AMESet by means of moisture loss coefficient method.Five working experimental conditions were designed for a heat exchanger: when the hot side and cold side flow rates,pressures and inlet temperatures are stabilized at 2 200 kg/h,2 100 kg/h,1.16 MPa,0.13 MPa,81.5 ℃,-17.5 ℃ dynamically and respectively and the absolute humidity of cold side was 8 g/kg,the absolute humidity of hot side were 22 g/kg,20 g/kg,18 g/kg,14 g/kg and 10 g/kg respectively.The outlet temperature and temperature difference efficiency of hot and cold side were measured,and the temperature difference efficiency was calculated by the model of wet heat exchanger.The study result shows that the temperature difference efficiency error of the wet heat exchanger model is within 4% and the relative error is within 10%,which meets the engineering requirements.When the absolute humidity on the hot side is increased from 1 g/kg to 30 g/kg,the calculated temperature difference efficiency is dropped slowly,while efficiency is dropped rapidly after the fins form a liquid film.The trend is consistent with the actual situation.
[中图分类号]
TQ051.5
[基金项目]