Computer Controlled – Heat Transfer in Forced Convection

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Present set-up is computer controlled with data logging facility. When the equipment is interfaced to computer, the end user has an access of every input and output of the setup and can log data of experiments. The present set-up is designed to study the heat transfer in forced convection. The apparatus consists of blower unit fitted with the test pipe. The blower is driven by an electrical motor at fixed speed. A Nichrome wire heater surrounds the test section externally. Four Temperature Sensors are embedded on the test section, two placed in the air stream at the entrance and exit of the test section to measure the inlet and outlet air temperature. Test pipe is connected to the delivery side of the blower along with the orifice and differential pressure transmitter to measure flow of air through the pipe. Delivery line of blower has a control valve by operating which, desired various flow rates of air can be achieved. Heat input to the heater is controlled by computer signal to have a smooth control on desired temperature conditions as per end user requirements. This control facilitates end user to control required heat input to the heater, automatically, and further steady state of experiment is achieved in very less time as compared to manual control. Electronic energy meter will be provided to measure the heat input. It has an interfacing unit designed by K. C. Engineers along with Lab view software. This educational software allows/enables user to log the real time experimental data and tabulate the experimental/sample reading according to the requirement of experiment. User have a control on data logging, printing the stored data and preparing spread sheets in Excel. Flexible graph plotting facility is also available in the software.

Test section  Horizontal, externally heated
Diameter 28 mm (approx.)
Length 400 mm (approx.)
Blower. FHP of Standard make
Heater Nichrome Wire. Heat input controlled by computer signal.
Air Flow Measurement Orifice and DPT.
Control panel comprising of Energy meter: Digital Type for power measurement.

Temperature measurement: Temperature Transmitter – 6 Nos. with 4-20 mA Output.

With standard make On off switch, Mains Indicator etc.