Forced convection heat transfer experimental apparatus
This study examines the theory of heat transfer by forced convection and various formulas related to forced convection in pipes. The apparatus consists of an electric fan, a heater-equipped copper pipe covered with insulation, a measuring display, and a control panel. The air drawn in by the fan and flow control valve enters the test copper pipe (with an inner diameter of 32 mm) through an orifice. The air heated by the heater is discharged outside while passing through each measurement point. The control panel is equipped with four sets of manometers to measure the pressure loss of the fan, orifice flow rate, pressure loss in the copper pipe, and the differential pressure of the Pitot tube. Additionally, a temperature switch displays the temperatures from 14 thermocouples installed at various locations on the copper pipe. The thermocouples are installed at seven locations on the outer surface of the copper pipe, three locations on the outer surface of the insulation pipe, and three locations on the inner surface of the insulation pipe. A Pitot tube with thermocouples is also included to measure the velocity distribution in the cross-section of the copper pipe. To avoid overheating, the heater is designed to stop when the air is not flowing as specified.
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basic information
TD1 Dimensions and Weight: 3500 x 850 x H1920mm, approximately 344kg Power Supply: Three-phase AC 200V 18A 50/60Hz Test Tube: Copper tube (inner diameter 32.6mm, wall thickness 1.2mm), insulation tube (outer diameter 73mm) Test Tube Length: Approximately 1750mm Maximum Flow Rate: Approximately 60m/s Heater Heating: Maximum approximately 1.1kW, about 150℃ Temperature Measurement: Thermocouples x14 locations Flow Measurement: Manometers x4 sets (fan pressure loss, orifice, copper tube pressure loss, pitot tube differential pressure) Power Measurement: Analog current/voltage meter Noise Level: Approximately 80dB (operator position) Operating Temperature Range: +5℃ to +40℃
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Applications/Examples of results
Main experimental items: - Experiment to calculate Reynolds number from velocity distribution, air density, viscosity coefficient, and average flow velocity - Experiment to calculate flow velocity using an orifice plate from air density and flow coefficient - Experiment to measure temperature distribution in the pipe cross-section and calculate bulk temperature - Experiment to calculate the isentropic efficiency of the fan - Measurement of heat transfer rate along the axial direction of the copper pipe, heat transfer rate to the fluid, thermal conductivity of insulation, heat balance, and heat transfer rate to the pipe surroundings - Calculation of dimensionless numbers (Nusselt number, Reynolds number, Prandtl number, Stanton number) Delivery record: Sendai National College of Technology
Detailed information
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TD1 Configuration Diagram
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Control panel reference photo
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Cross-section diagram of a test tube
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Megakemu designs, manufactures, and imports various experimental and practical equipment for universities, junior colleges, technical colleges, high schools, and vocational schools nationwide. While the world has made advancements in various fields, it seems that our Earth's environment is being disturbed by ourselves and is approaching its limits. The world is seeking new Japanese technologies that coexist with the Earth's environment.