Concentric Tube Heat Exchanger
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Extended Concentric Tube Heat Exchanger
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The heat exchanger is fully instrumented using the Heat Exchanger Service Unit with thermocouples on the inlet and outlet of both the hot and cold streams. An example of an industrial Coiled Concentric Tube Heat Exchanger with turbulence enhancing tubes. The heat exchanger is deliberately not insulated so that heat losses in all of the configurations can be investigated. The heat exchanger can be arranged so that either hot or cold streams are in the inner tube. With either configuration both co-current and counter-current flow can be established.
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Self sealing quick release connections enable rapid connection to and conversion from parallel to counter current flow. An extended version with 3 pairs of intermediate points and a total of 10 thermocouples is also available.
A clear acrylic tube containing cold water surrounds an inner stainless steel tube in which the hot water flows. Six thermocouples measure hot and cold inlet, mid-point and exit temperatures. Total heat transfer area of approximately 24000mm2.
Study of the heat transfer under counter-current and co-current flow conditions.
Flow influence on the heat transfer. Reynolds number calculation.
Global energy balance in the heat exchanger and the study of losses.
Exchanger effectiveness determination.
The module comprises a service module, hot water tank with a transfer pump and instruments for monitoring and control. Parallel or counter flow is by switching cold water hoses. The Concentric Tube Heat Exchanger, Transparent Casing apparatus is used for studying the heat transfer through a concentric tube under parallel or counter flow conditions. The unit requires outside cooling water supply. The unit consists of a concentric tube heat exchanger, and a service module.
Experiments:
Effects of flow rate and temperature difference.
Demonstration of heat transfer under parallel and counter flow.
Determination of heat transfer coefficient.
