Products  |  Thermodynamics, Heating and Sanitary Systems  |  Applied Thermodynamics  |  WL 308
WL 308 Heat Transfer at Pipe Walls Show data sheet (pdf file)
Technical Description

The characteristic properties of the heat transfer in turbulent flow in a pipe heat exchanger are demonstrated using this unit. It is possible to demonstrate both parallel and counterflow operation. The non-linear temperature distribution along a heat exchanger can be demonstrated by measuring temperatures at the inlet, outlet and halfway along the pipe. During this process the water temperature in the inner and outer pipes are measured. An additional measurement of the pipe wall temperature on the inner pipe enables the heat transfer at the wall to be investigated in detail. During the experiment, key parameters such as heat transfer rate, heat transfer coefficient and heat loss are determined. The components for the unit are clearly laid out on a panel so that the function of the heat exchanger is easy to follow visually. The system is designed to be set up on a table.
A supply of cooling water is required.

 

Learning Objectives / Experiments
- Determination of thermal balances
- Efficiency of a pipe heat exchanger
- Parallel and counterflow operation
- Heat transfer at pipe walls and in the flow
- Effect of the mass flow rates
Features
* Heat transfer can be switched from parallel flow to
  counterflow1
* Heat exchanger fitted with 7 temperature measuring
  points1
* PID controller for hot water circuit
Alternative products
WL 110 -- Heat Exchanger Service Unit
WL 302 -- Concentric Tube Heat Exchanger / PC
WL 315C -- Heat Exchanger Trainer
Specification

[1] Tubular heat exchanger for turbulent flow
[2] lxwxh 1337x730x553mm, 100kg
[3] Parallel and counterflow operation
[4] Pump rating 45W
[5] Heater rating 3kW
[6] Water tank 6.5ltr
[7] Copper piping
[8] PID controller for hot water circuit
[9] 7 temperature sensors with digital display and selection switch
[10] System diagram
[11] 230V, 50Hz, 1 phase

 

Technical Data

Heat exchanger surface areas

- hot side: 16965mm²

- cold side: 22619mm²

- mean transfer surface: 19657mm²
Length: 800mm
Conductivity of Cu: 384W/mK
Heater: 3kW, with temperature cut-out
Pump

- rating: 45W

- max. flow rate: 3m³/h

- max. head: 4m
Flow rate measurement

- cold water: 4...41g/s

- warm water: 5...65g/s and 14...170g/s

 

Dimensions and Weight
l x w x h : 730 x 553 x 1337 mm
Weight : approx. 100 kg
Connections
230V, 50Hz, 1 phase
Cold water supply
Scope of Delivery
1 complete unit
1 instruction manual
Order Details
060.30800  WL 308  Heat Transfer at Pipe Walls
© 2005 G.U.N.T. Gerätebau GmbH