DESCRIPTION
Technical Description
The trainer comprises an insulated duct through which air is drawn with the aid of a fan. The air flow 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
- 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)
FEATURES
Specification
[1] air duct for the investigation of the heat transfer in air flows
[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 velocity 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
Fan
- power: 1100W
- max. flow rate: 1680m³/h
- max. pressure difference 1000Pa
- nominal speed: 2840min-1
Pitot tube: travel 300mm
Inclined tube manometer: 0...100Pa
Sensor measuring ranges
- temperature: 2x 0...50°C
- 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
