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WL 310 Cross-Flow Heat Exchanger
Education / GUNT Hamburg / Thermal Engineering and HVAC / Applied Thermodynamics /

The experimental unit mainly comprises a vertical air duct. A fan draws the air through the duct. Interchangeable heaters dissipate heat directly into the airflow. The following heater elements are included: pipe, pipe bundle and finned pipe. To investigate the effect of the flow in the pipe bundle, the heater insert can be positioned in different pipe rows.

  Electronic sensors are used to take measurements. The measured values are indicated digitally on the display unit and transferred directly to a PC. Software for data acquisition is included. The software enables, among other aspects, the measured data to be recorded and stored. The flow rate, Reynolds and Nusselt numbers are calculated, temperature-time relation and the dependence of the Nusselt number on the Reynolds number can be demonstrated graphically.


Learning Objectives / Experiments

- investigation of convection processes
- comparison of heat transfer for different heating

- comparison between different heating elements
- demonstration of the relationship between heat

  transfer, area of heat transfer and flow velocity



[1] experiments with a cross-flow heat exchanger

[2] heating of an air flow using heating elements, heating capacity adjustable

[3] heating elements: pipe, pipe bundle, finned pip

[4] airflow adjustable

[5] electronic sensors for temperature, differential pressure, power

[6] LabVIEW software for data acquisition via USB under Windows XP or Windows Vista


Technical Data

Flow cross-section: 120x120mm

Radial fan
- max. power consumption: 250W
- max. pressure difference: 430Pa
- max. flow rate: 13m³/min

"Pipe" heating element
- power: 1x 500W
- heating surface: 1x approx. 0,003m²

"Pipe bundle" heating element
- power: 2x 500W
- heating surface: 2x approx. 0,003m² 

"Finned pipe" heating element
- power: 1x 500W
- heating surface: 1x approx. 0,2m²

Measuring ranges
- temperature: 1x 0...100°C, 1x 0...200°C
- power: 0...500W
- differential pressure: 0...10mbar


Dimensions and Weight

LxWxH: 500x500x1.425mm (experimental unit)

LxWxH: 370x315x160mm (display and control unit)
Weight: approx. 45kg

Required for Operation
230V, 50/60Hz, 1 phase or 120V, 60Hz/CSA, 1 phase
Scope of Delivery

1 experimental unit

3 heating elements

1 display and control unit

1 LabVIEW software CD + USB cable

1 manual

Order Details
060.31000  WL 310  Cross-Flow Heat Exchanger