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《Journal of Chengde Petroleum College》 2004-01
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Effect of the Positions of Thermocouples on the Wall Temperature Measurement

SI Guang shu,YANG Ze liang (College of Electric Power,South China University of Technology,Guangzhou 510640,China)  
The effect of the positions of thermocouples on the temperature measurement for the inner heating surface of the duct,filled with glass or bearing steel beads,is theoretically investigated on the base of the experimental data.The diameters of beads,the heat conductivity of beads and the duct wall,and the coefficients of heat convection are all considered.It is shown that if the glass beads are filled into the duct,the difference of the positions of thermocouples will not make the results of temperatures measurement change greatly,and in spite that water of air flow through it.Nevertheless,the results of temperature measurement will vary greatly if the bearing steel beads are filled,especially if water flows through the duct.
【CateGory Index】: TH811
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