相变储热换热器技术研究进展

Research Progress of Phase Change Heat StorageExchanger Technology

综述了目前业内的一些新型换热器的结构设计和优化结果,重点介绍了新型换热器的结构和传热效果的强化机理。结论如下:使用泡沫金属和热管虽然会抑制自然对流但会大幅度提高导热性能,对传热的强化效果显著;换热面积更大,四重管比三重管更具换热优势;螺旋管节距随温度梯度变化时具有更好的温度均匀性;弯折板式换热器性能优异且占地面积小;管壳式换热器换热效果好、结构简单、工业应用前景更为广泛。

In this paper,the structural design and optimization results of some new heat exchangers in the industry are reviewed,and the structure of the new heat exchangers and the enhancement mechanism of the heat transfer effect are mainly introduced.The conclusions are as follows:Although the use of foam metal and heat pipe will inhibit natural convection,it will greatly improve the thermal conductivity,and the heat transfer enhancement effect is remarkable.Due to the larger heat exchange area,the quadruple tube has more heat transfer advantages than the triple tube.The helical tube pitch changes with the temperature gradient to have better temperature uniformity.The bent plate heat exchanger has excellent performance and small footprint,and the shell and tube heat exchanger have good heat exchange effect,simple structure and wider industrial application prospects.