Fluidisation and Fluid Bed Heat Transfer Unit Manufacturer,Supplier and Exporter in India
Product Code : EL-TWL-9117
Jlab Export is a leading Fluidisation and Fluid Bed Heat Transfer Unit Manufacturer,and suppliers in India
Air blown up through granular material in a glass chamber takes the bed from fixed, through the onset of fluidisation, to entrainment at high flow. An electric heater placed in the bed lets students measure heat transfer coefficients and compare them with convection to air alone. Bed materials can be changed quickly, and locally sourced materials or distributors suit project work.
Specifications
| Fluidising medium | Air |
| Bed chamber | Transparent glass, bed materials supplied and quickly changed |
| Heat transfer | Electric heater in the bed, power set by a variable transformer |
| Heater meters | Voltmeter 0 to 250 V, ammeter 0 to 3 A |
| Air flow meters | 0.15 to 3.5 litres/sec |
| Pressure drop | Manometer across the bed |
| Temperatures | Digital thermometer for heater surface, air inlet and probe |
| Mounting panel | Glass reinforced plastic |
| Protection | Fusing and earthing of all components, heater temperature controller |
| Minimum order quantity | 1 unit |
| Dispatch time | Usually 14–18 working days |
| Manufacturer | JLab (Jain Laboratory Instruments Pvt Ltd), Ambala, India |
Experiments on Fluidised Beds
The classic run plots bed pressure drop against superficial air velocity, first raising the flow and then lowering it. The pressure drop climbs through the fixed bed and then levels off, at roughly the bed weight per unit area, once the particles lift. The break in the curve gives the minimum fluidisation velocity, and the bed height read through the glass shows the expansion.
Splitting the bed material into size fractions with Test Sieves on a Sieve Shaker shows how particle size moves the minimum fluidisation velocity. With the heater on, students find h = Q / (A ΔT) from the electrical power and the heater-to-bed temperature difference, then repeat at other velocities and immersion depths.
Frequently Asked Questions
How is the minimum fluidisation velocity found?
Read the manometer at each air flow, and divide the flow by the bed cross-section to get the superficial velocity. Plot pressure drop against velocity on log scales. The rising fixed-bed line and the flat fluidised line meet at the minimum fluidisation velocity.
Why does the pressure drop stop rising once the bed fluidises?
At that point the drag of the air carries the weight of the particles. Extra air then goes into expanding the bed and forming bubbles, so the pressure drop stays close to the bed weight divided by its area.
What heat transfer readings can be taken?
The voltmeter and ammeter give the heater power, and the digital thermometer reads the heater surface, the air inlet and a probe in the bed. From these, students find the heat transfer coefficient and see how it changes with velocity, depth of immersion and particle size.
Can we use our own bed material or distributor?
Yes. Other locally sourced bed materials and air distributors can be fitted for student projects. Testing two distributor designs with the same bed shows how the distributor affects bubbling, channelling and the evenness of fluidisation.
Other Particle and Packed Bed Equipment
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Last updated: 6 November 2026
