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Products  |  Thermal Engineering and HVAC  |  Applied Thermodynamics  |  ET 300
ET 300 Water-to-Air Heat Exchanger Trainer Show data sheet (pdf file) Print page
Technical Description

Quantitative investigations on a water-to-air heat exchanger can be performed using this trainer.

  The trainer consists of a closed hot water circuit with heater, tank, pump and flow meter. Air is forced through the heat exchanger using a radial fan.

  Water and airflow rate are adjustable. The flow rate of water is measured using an electromagnetic flow sensor and an orifice plate flow meter is used for the airflow measurement.

  Energy balances can be established by measuring inlet and outlet temperatures. A pressure sensor in the water circuit enables the pump characteristic to be plotted. The measured values can be read on digital displays. At the same time, the measured values can also be transmitted directly to a PC via USB. The data acquisition software is included.


Learning Objectives / Experiments

- Determination of heat transfer rates of water and air
- Determination of the efficiency or the loss
- Plotting of the pump characteristic

- Temperature and flow rate measurement

- Energy balances

* Clear experimental set-up1
* Closed hot water circuit
Alternative products
WL 312 -- Multipurpose Air Duct and Heat Transfer Unit
WL 315C -- Heat Exchanger Trainer

[1] Transfer characteristics of a water-to-air heat exchanger
[2] Water-to-air heat exchanger as cooler for hot water 
[3] Electrical heater with thermostat
[4] Closed hot water circuit including heater, tank and pump
[5] Water flow and airflow rates adjustable

[6] Determination of airflow rate via differential pressure at orifice plate flow meter
[7] Electronic sensors with digital displays
[8] LabVIEW software for data acquisition via USB under Windows XP or Windows Vista


Technical Data


- power consumption: 140W

- max. head: 4.3m

- max. flow rate: 3500L/h

- material Cu/Al

- heat transfer area: 2.80m

- capacity: 2kW

- flow rate: 100L/min

- water temperature: 70C

Heater: 2kW

- power consumption: 0.25kW
- max. pressure difference: 430Pa

- max. flow rate: 13m/min
Hot water tank: 28L

Measuring ranges
- temperature: 0...100C
- water flow rate: 0...6m/h
- delivery pressure water: 0...4bar abs.
- differential pressure (orifice plate flow

  meter): 0...10mbar


Dimensions and Weight
l x w x h: 1550 x 750 x 1350 mm
Weight: approx. 200 kg
Required for Operation
230V, 50/60Hz, 1 phase
Scope of Delivery

1 heat exchanger

1 LabVIEW software CD + USB cable

1 manual

Order Details
061.30000  ET 300  Water-to-Air Heat Exchanger 
© 2005 G.U.N.T. Gerätebau GmbH