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Products  |  Thermal Engineering and HVAC  |  Applied Thermodynamics  |  WL 312
WL 312 Multipurpose Air Duct and Heat Transfer Unit Show data sheet (pdf file) Print page
Technical Description

  The trainer comprises an insulated duct through which air is drawn with the aid of a fan. The airflow generated is homogeneous due to a specially shaped inlet area. Different heat exchanger elements can be inserted in the duct: plain tubes (WL 312.01), finned tubes (WL 312.02), direct expansion coil (WL 312.03).
  Velocity distributions and pressure loss are measured with a Pitot tube and an inclined tube manometer. Temperature and humidity sensors are included. The following accessories are recommended for supplying the heat exchanger: hot water bench (WL 312.10), cold water bench (WL 312.11), condensing unit (WL 312.12).

Learning Objectives / Experiments

Experiments without accessories
- Recording the fan characteristic curve
- Velocity distribution in the duct


Experiments with accessories
- Measurement of pressure loss along the duct
  (HM 170.50)
- Heat transfer at plain tubes (WL 312.01, together
  with WL 312.10 / WL 312.11)
- Heat transfer at finned tubes (WL 312.02, together
  with WL 312.10 / WL 312.11)
- Heat transfer at a direct expansion coil
  (WL 312.03, together with WL 312.12)

* Experiments on the heat transfer in airflows1
* Flexible base unit1
* Comprehensive range of accessories
Available accessories
HM 170.50 -- 16-Tube Manometer, 600mm
WL 312.01 -- Heat Exchanger Element Plain Tubes
WL 312.02 -- Heat Exchanger Element Finned Tubes
WL 312.03 -- Heat Exchanger Element Direct Expansion Coil
WL 312.10 -- Hot Water Bench
WL 312.11 -- Cold Water Bench
WL 312.12 -- Condensing Unit
Alternative products
WL 314 -- Heat Transfer Bench
WL 312 Multipurpose Air Duct and Heat Transfer Unit

[1] Air duct for the investigation of the heat transfer in airflows
[2] Use of different heat exchangers in the air duct
[3] Insulated air duct with flow straightener

[4] Radial fan with adjustable flow rate
[5] Pitot tube with inclined tube manometer to measure velocitiy distribution and pressure loss
[6] Pressure sensor, combined temperature and humidity sensor
[7] Switch cabinet with digital displays


Technical Data

Air duct cross-section: 150x300mm
- power: 900W
- max. flow rate: 1680m/h
- max. pressure difference 1000Pa
- nominal speed: 2840min-1
Pitot tube: travel 300mm
Inclined tube manometer: 0...100Pa
Sensor measuring ranges

- temperature: 2x 0...50C
- humidity: 2x 100% rel. humidity
- pressure: 2x 0...10mbar


Dimensions and Weight
LxWxH: 2310x750x1800mm
Weight: approx. 150kg
Required for Operation
230V, 50Hz, 1 Phase
Scope of Delivery

1 trainer

1 manual

Order Details
060.31200  WL 312  Multipurpose Air Duct and 
                                 Heat Transfer Unit
© 2005 G.U.N.T. Gerätebau GmbH