TY - JOUR
T1 - Theoretical Consideration of Simultaneous Measurment of Flow Rate and Fouling Factor
AU - Fujii, Tetsu
AU - Koyama, Shigeru
AU - Shinzato, Kan Ei
PY - 1987
Y1 - 1987
N2 - A method for the simultaneous measurement of flow rate in a tube and fouling factor at the inner surface is proposed based on numerical calculations for turbulent heat transfer from a thick tube wall which is heated from the outer surface. Overall heat transfer characteristics depend on the heated length, flow rate and fouling factor of a given tube. Therefore, by substituting the measured data on temperature, at the outer tube surfaces heated by given heat fluxes for short and long heated sections, into simultaneous equations which are derived in the present paper, the values of flow rate and fouling factor can be obtained. Some examples are presented for a condenser tube of aluminium brass and titanium. The estimated accuracy is about several percent for flow rate and several tens per cent for fouling factor, though these values depend on the accuracy of temperature and heat flux measurements. Methods for improving the accuracy are discussed.
AB - A method for the simultaneous measurement of flow rate in a tube and fouling factor at the inner surface is proposed based on numerical calculations for turbulent heat transfer from a thick tube wall which is heated from the outer surface. Overall heat transfer characteristics depend on the heated length, flow rate and fouling factor of a given tube. Therefore, by substituting the measured data on temperature, at the outer tube surfaces heated by given heat fluxes for short and long heated sections, into simultaneous equations which are derived in the present paper, the values of flow rate and fouling factor can be obtained. Some examples are presented for a condenser tube of aluminium brass and titanium. The estimated accuracy is about several percent for flow rate and several tens per cent for fouling factor, though these values depend on the accuracy of temperature and heat flux measurements. Methods for improving the accuracy are discussed.
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U2 - 10.1299/kikaib.53.3323
DO - 10.1299/kikaib.53.3323
M3 - Article
AN - SCOPUS:0023452484
SN - 0387-5016
VL - 53
SP - 3323
EP - 3328
JO - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
JF - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
IS - 495
ER -