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 Products:  Thermodynamics, Heating and Sanitary Systems » Applied Thermodynamics » Particular Applications » WL 225
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WL 225: Fluidisation and Heat Transfer

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Fluidisation and Heat Transfer

Fluidisation and Heat Transfer

Product Details

Technical Description
A fluidised bed is formed when a mass of particles is suspended by passing gas through them. The thermodynamic and fluid mechanical properties of the solid take on the character of a fluid. The heat transfer from a heated cylinder to the fluidised bed can be investigated using the benchtop unit. The glass measuring cylinder with background lighting enables the fluid bed and the fluidisation process to be very clearly observed. A heating element that can be lowered into the reactor enables the transfer of heat in the fluidised bed to be investigated. Temperatures are measured with sensors at the air inlet of the reactor, at the surface of the heating element and in the fluidised bed. A safety valve limits the reactor pressure.
A supply of compressed air is required. 

Learning Objectives / Experiments
- Effect of particle size on fluidisation
- Fluid permeability of fixed and fluidised beds
- Heat transfer in a fluidised bed
  + influence of the amount of air
  + influence of the position of the heater
  + influence of the particle size
- Observation of the fluidisation process
- Pressure curve within the bed
- Pressure required at varying throughputs
- Determination of the loosening velocity
- Observation of the sedimentation processes

* Clear experimental set-up for investigations on the transfer of heat in a fluidised bed1
* Illuminated glass reactor for optimal observation of the fluidisation1
* Fluidised beds with varying particle size
[1] Experimental set-up for the investigation of the transfer of heat in a fluidised bed
[2] Glass reactor, illuminated from the rear
[3] Fluidised bed made of corundum, particle size either 125µmm or 300µm, volume 1ltr
[4] Adjustable heating element
[5] Temperature sensors at heater, air inlet, in fluidised bed
[6] Air flow rate measurement with rotameter and via measuring orifice
[7] Safety valve, temperature cut-out at heater, air filter at inlet and outlet
[8] 230V, 50Hz, 1 phase or 120V, 60Hz, 1 phase

Technical Data
Glass reactor
- capacity: 2.15L
- max. air requirement: 300L/h
- filling amount: approx. 1L
- operating pressure: 0.5bar

- power: 0...140W
- surface: approx. 10cm²

Measuring ranges
- temperature air inlet: 0...100°C
- temperature heater / fluidised bed: 0...400°C
- airflow rate (rotameter): 10...124 standard L/h
- airflow rate (orifice): 50...300L/h
- pressure in fluidisd bed: 0...25mbar
- power: 0...600W
- 2 manometers: 0...1.6bar

Dimensions and Weight
l x w x h: 900 x 455 x 850 mm
Weight : approx. 65 kg

230V, 50Hz, 1 phase or 120V, 60Hz, 1 phase
Compressed air connection: min. 2bar

Scope of Delivery
1 experimental set-up, complete
2 bags of particles
1 instruction manual

Order Details
060.22500  WL 225  Fluidisation and Heat Transfer
Alternative products
CE 220 -- Fluidised Bed Formation

SELKA GmbH, Hamburg
Grindelallee 188, 20144 Hamburg / Germany
Tel.: + 49 (0) 40 343453 |  Fax: +49 (0) 40 63657075
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