强制对流传热的换热表面结垢特性实验研究

• Published in: 中国化学工程学报(英文版) Vol. 16; no. 4; pp. 535 - 540
• Main Authors: 全贞花, 陈永昌, 马重芳
• Format: Journal Article
• Language: Chinese
• Published: The Education Ministry Key Laboratory of Enhanced Heat Transfer and Energy Conservation,College of Envi ronmental and Energy Engineering,Beijing University of Technology,Beijing 100124,China 2008
• Subjects: thermal resistance; calcium carbonate; fouling; heat transfer
• ISSN: 1004-9541; 2210-321X

TQ0; An experimental study was conducted to investigate the fouling process of calcium carbonate on the heat transfer surface,during forced convective heat transfer.The dynamic monitoring apparatus of fouling resistance was set up for the present experiments.The fouling behaviors were examined under different factors including fluid velocity,hardness,alkalinity,solution temperature,and wall temperature.Asymptotic fouling curves varying with time were obtained.The fouling rate and asymptotic fouling resistance increased and the induction periods were shortened with the fluid velocity decreasing,hardness and alkalinity increasing,and solution temperature and heat transfer surlace temperature lncreasmg.The components of touling that formed on the heat transfer surface included crystallization fouling and particulate fouling.The thermal performance parameter Of fouling,ρfλf,varied from 380 to 2600 kg·W·(m4·K)-1,increasing with growing velocity and decreasing solution ternperature,hardness or alkalinity.Furthermor