碳纤维换热器换热性能实验研究

Experimental Study on the Heat Transfer Performance of Carbon Fiber Heat Exchanger

为了解决烟气余热利用中换热器低温露点腐蚀问题,提出了一种新型碳纤维换热器。并以碳钢换热器作为对比进行了实验,实验测量了碳纤维、碳钢两种材料换热管的导热系数;利用烟风换热实验监测系统动态模拟火力发电厂锅炉尾部烟道换热器换热过程,在相同工况下实验测试了两种材料换热器的换热性能。结果表明:本实验所用碳纤维换热管导热系数大于碳钢换热管;碳纤维换热器整体换热性能弱于碳钢换热器,原因是为防止碳纤维换热器渗水,外表面涂敷了一定厚度的树脂材料,导致碳纤维换热器整体换热性能下降。

This paper proposes a kind of carbon fiber heat exchanger aiming to solve the low temperature dew point corrosion in the waste heat utilization. Comparative experiments on the coefficient of thermal conductivity between carbon fiber heat exchanger tube and carbon steel heat exchanger tube have been done. The experiment on heat transfer performance is done by means of the monitoring system for heat exchange in air and gas system,which can simulates the working environment of heat exchangers in power plant. The experimental results show that the thermal conductivity of carbon fiber heat exchanger tube is higher than that of carbon steel heat exchanger tube,while the overall heat transfer performance of carbon fiber heat exchanger is relatively poor due to the resin coating,which is utilized to prevent water percolation.