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Products  |  Thermal Engineering and HVAC  |  Applied Thermodynamics  |  WL 302
WL 302 Trainer Tubular Heat Exchanger Show data sheet (pdf file) Print page
Technical Description

Using the trainer, the characteristic properties of heat transfer in pipe flows can be demonstrated. The heat transfer takes place in a coaxial tubular heat exchanger. The hot water is fed through the inner tube.
  Using the trainer both parallel flow and counterflow operation with their different temperature profiles can be demonstrated. The non-linear temperature profile along a heat exchanger can be demonstrated by measuring temperatures at the inlet, outlet and halfway along the pipe. After the experiment the key parameters such as heat flux, heat transfer coefficient and heat loss are determined.
  The closed hot water circuit includes a tank with electrical heater and a pump. The hot water temperature is kept constant using a thermostat. The cold water is drawn from the water mains and is fed to a drain after use.

  The flow rate and relevant temperatures are recorded by sensors. A display panel for the measured values is located on the instrument panel next to the copper pipework. The measured values are indicated on digital displays and can also be transmitted directly to a PC via USB. The data acquisition software is included.

  

Learning Objectives / Experiments

- Plotting temperature curves

  * in parallel flow operation

  * in counterflow operation
- Determination of mean heat flux for

  parallel flow and counterflow operation
- Determination of mean heat transfer coefficient

Features
* Clear experimental set-up1
* Heat transfer in pipe flows1
* Processing of measured data on a PC1
* Closed, insulated hot water circuit1
Alternative products
WL 110 -- Heat Exchanger Service Unit
WL 308 -- Heat Transfer in a Tubular Heat Exchanger
WL 315C -- Heat Exchanger Trainer
Specification

[1] Trainer with a tubular heat exchanger
[2] Closed hot water circuit, insulated with pump
and heater with thermostat
[3] Copper piping
[4] Ball valves in the cold water circuit to select the operation mode parallel flow or counterflow
[5] Temperature measurement with 6 sensors
[6] Flow rate measurement with sensor

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

 

Technical Data

Pump

- power consumption: 70W

- max. flow rate: 3800L/h

- max. head: 4m
Heater: 2kW, with thermostat: 0...80C
Heat transfer areas

- hot side: 30159mm

- cold side: 40212mm

- mean transfer area: 34945mm
Tank: 20L

 

Measuring ranges

- temperature: 0...200C

- flow rate: 0...720L/h
 

Dimensions and Weight
l x w x h: 1385 x 550 x 1850 mm
Weight: approx. 110 kg
Required for Operation
230V, 50/60Hz, 1 phase or 120V, 60Hz, 1 phase
Cold water connection: min. 150L/h
Scope of Delivery

1 trainer 

1 LabVIEW software CD + USB cable

1 manual

Order Details
060.30200  WL 302  Trainer Tubular Heat 
                                  Exchanger
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© 2005 G.U.N.T. Gerätebau GmbH