Cross-Flow Heat Exchanger Apparatus
The Present setup is containing vertical duct containg a working section, a constant speed fan, and an exhaust with silencer. A variable slide valve controls the airflow. The working section includes a series of rods arranged in a matrix and at right-angles to the direction of airflow. To do experiments, students can remove any one of these rods and replace them with a cylindrical copper element. The copper element is of known thermal capacity and includes a built-in thermocouple. Students insert the element, which has been pre-heated to a specific temperature, into the working section at a known air velocity. They measure the time taken for the temperature to drop and determine the heat transfer rate.
The air mass flow rate is derived using an air velocity sensor.
Some parts of the heat exchanger such as probes and axial fan can be easily removed for cleaning.
A small-scale cross-flow heat exchanger system for use with the Heat Exchanger Service unit to teach the fundamentals concepts of heat transfer.
K-type thermocouples measure the inlet and outlet water and air temperatures, as well as permitting the connection.
The mounted on a PVC base plate which is designed to be installed on the plinth of the Heat Exchanger Unit without the need for tools.
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