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《Journal of Petrochemical Universities》 2005-03
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ENHANCEMENT OF HEAT TRANSFERRING POOL NUCLEATE BOILING AND SCALE INHIBITING

LI Tie - feng, REN Xiao - guang, SONG Yong - ji, CHENG Gang. College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, P.R. China; Beijing Institute of Petrochemical Technology, Beijing 102617, P.R. China  
The effect of calcium carbonate scale formation and the heat transfer of saturated pool nucleate boiling was studied through auto - data system and pool boiling experiments. At the same time the additive polyarylamide(PAM) of W/O and the super hydrophobic surface effect were studied. With the additive- PAM the effect of characters of solution, concentration of additive, heat flux on the heat transferring pool nucleate boiling were studied. And the mechanism of the scale formation was analysised. The mechanism is also explained by the view that the surface nucleate center is affected by the deposition and growth of scale. The result through dynamic method show that PAM of W/O can enhance pool nucleate boiling heat transfer, it can decrease the diameter of the leaved bubble, increase the frequency of the leaved bubble so that it can enhance the heat transfer coefficient. And it has the best range of concentration. At the same time the heat reactor treated by super hydrophobic surface was proved to have good scale resistance, all the heat transfer coefficients of treated surface are higher than that of the untreated ones in the steady time.
【Fund】: 北京市委组织部优秀人才专项资助(Z03-16)。
【CateGory Index】: TK124;
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