Experimental Research On Pipe Heat Exchanger For Industrial Waste Heat

In this study, we developed a heat pipe heat exchanger for waste heat recovery ofthe direct blast furnace slag water. It’s characteristic includes low-cost, easymaintenance, strong adaptability for water and it does not affect the industrialoperation. Research in this experiment, makes businesses to minimize the cost to useenergy what is not or difficult to recycle from industrial cooling water heat to heatingand power generation. This paper introduces the development,of industrial waste heatrecovery using heat pipe heat exchanger, including the design and manufacture ofheat pipe, design and manufacturing of heat pipe heat exchanger, and cleaningsystem used. while a industrial waste heat recovery heat pipe heat exchangerperformance had been tested. Finally, with heat transfer coefficient, effectiveness,exergy efficiency and entransy efficiency,we proposed a heat exchanger operationoptimization method in the experiment.By the experimental study of the performance evaluation and operationoptimization of heat pipe heat exchanger, the following conclusions:(1) The heat pipe heat exchanger in the hot water has worked for a week, heattransfer and heat transfer coefficient was stability. Cleaning device described in thisarticle is stable. we provided a new method for heat pipe heat exchanger fouling.(2) At a constant cold water flow, the exergy efficiency and thermal efficiencyas blast furnace slag volume of waste water flow rate increases, but under the sameconditions, the performance with more than water flow increases. Over water at aconstant flow of water over the performance increases with the increase of traffic,while exergy efficiency and entransy efficiency has no significant change.(3)The optimal flow is at the curves plot of exergy efficiency, entransy efficiencyand effectiveness. Under the experimental conditions, the optimal waste water flow is1.2m3/h, and the optimal cold water flow is2.5m3/h.(4) At different cold water flow (25m3/h,50m3/h,75m3/h,100m3/h), the heattransfer coefficient with the remaining water flow increases, and the heat transfercoefficient is between in577and1334W/(m2K).