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 Products:  Thermodynamics, Heating and Sanitary Systems » Applied Thermodynamics » Air Heat Exchangers » WL 310
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WL 310: Cross-Flow Heat Exchanger

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Cross-Flow Heat Exchanger

Cross-Flow Heat Exchanger

Product Details


Technical Description
The benchtop 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. A data acquisition card for the PC with easy to use software 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 elements
· Comparison between different heating elements
· Demonstration of the relationship between heat transfer, area of heat transfer and flow velocity (Nusselt)

Features
Clear experimental set-up for demonstrating the fundamental principles of heat transfer
Processing of measured data on a PC
Benchtop unit, flexible in use
Complete instruction manual, including description of fundamental principles
Specification
[1] Table unit for experiments with a cross flow heat exchanger
[2] lxwxh 500x500x1425mm, 55kg
[3] Heating of an air flow using heating elements, heater power adjustable
[4] Heating elements: pipe, pipe bundle, finned pipe
[4] Flow cross-section 120x120mm
[5] Airflow adjustable
[6] PC data acquisition with LabViwe software under Windows NT/2000/XP
[7] Electronic sensors for temperature, differential pressure, power
[8] 230V, ~50Hz

Technical Data
Radial fan, 250W: Vmax: 780m³/h, max. flow velocity: 12m/s
Heater: nominal output 480W, tmax: 200°C
Heater surface areas: Pipe and pipe bundle: 0.00464m², Finned pipe: 0.17746m²
Measuring ranges: temperature: -40...150°C, power: 0...600W, differential pressure: 0...10mbar
System requirements: PC with Pentium III 600MHz, 1 PCI slot, free, 100MB free hard disc space, graphics card resolution (1024x768 pixel, true color)

Dimensions and Weight
l x w x h : 500 x 500 x 1425 mm
Weight : approx. 55 kg

Connections
230V, ~50Hz

Scope of Delivery
1 heat exchanger, fully assembled,
3 heating elements, 1 display and control unit, 1 data acquisition card with software, 1 manual

Order Details
060.31000 WL 310 Cross-Flow Heat Exchanger
Alternative products
HM 240 -- Principles of Airflow
WL 312 -- Multipurpose Air Duct and Heat Transfer Unit
WL 314 -- Heat Transfer Bench
WL 352 -- Free and Forced Convection Unit / PC

SELKA GmbH, Hamburg
Grindelallee 188, 20144 Hamburg / Germany
Tel.: + 49 (0) 40 343453 |  Fax: +49 (0) 40 63657075
E-Mail:
info@selkagmbh.com   |  Internet: http://www.selkagmbh.com

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