China is rich in industrial waste heat resources,the use of phase change heat exchangers to recover waste heat for building heating provides a reliable new way for clean heating.Binary mixed phase change materials of paraffin and stearic acid were prepared in different ratios,and experimental research on the changing rules of phase change temperature,latent heat of phase change,and thermal conductivity of the mixed phase change materials was carried out with the aim of finding suitable energy storage materials for phase change heat exchangers used in waste heat recovery.The results showed that the phase change temperature of 62#paraffin and stearic acid mixture fluctuated in the range of 43～66℃.When the ratio of 62# paraffin and stearic acid was 20％:80％,the phase change temperature was 62.73℃,and the latent heat of phase change was relatively large at 205.53J/g.There was not much difference between the latent heat of melting and the latent heat of condensation of the binary mixture,and the material exhibited minimal subcooling,making it an ideal energy storage material for phase change heat exchangers used for waste heat recovery at low-temperature.In application,the energy storage material is applied in phase change heat exchangers,the energy storage material melts and recovers industrial waste heat for heat storage,and the stored heat is used to heat the radiator backwater,thereby realizing the transformation of intermittent industrial waste heat into continuous output heat for heating.
关键词
工业余热/相变换热/储能材料
Key words
industrial waste heat/phase change heat exchanger/energy storage material
维普
万方数据