Critical Radius Of Insulating Material
Product Code : EL-HTL-11081
The Critical Radius Of Insulating Material apparatus from Lab Exports lets students demonstrate that heat loss from an insulated cylindrical pipe is maximum at a particular insulation radius, using four heated GI pipes with different insulation thicknesses.
Specifications
| Pipes | 4 nos., GI pipes with electrical heater inside |
| Insulation | Plaster of Paris, applied over pipes at different thicknesses |
| Control | 4 nos. dimmerstat to control heater input |
| Measurement | Common voltmeter and ammeter for heater input; digital temperature indicator for insulation temperatures |
| Services Required | 230V, 5A AC supply with earthing; floor area 1m x 1m x 1.5m height |
Key Features
- Four GI pipes with internal heaters, each insulated to a different thickness
- Demonstrates that heat loss is maximum at a specific critical insulation radius
- Common voltmeter and ammeter measure heater input power across all pipes
- Digital temperature indicator measures temperatures across the insulation layers
- Shows that critical radius equals the ratio of thermal conductivity to outside heat transfer coefficient
- Individual dimmerstat control for each pipe's heater
Applications
The Critical Radius Of Insulating Material apparatus is used in heat transfer laboratories to demonstrate the critical radius of insulation concept, helping students understand why adding insulation beyond a certain radius can actually increase heat loss from small-diameter cylindrical surfaces.
Why Choose Lab Exports
Lab Exports is a trusted manufacturer and exporter of engineering lab equipment including a complete range of Heat Transfer Lab apparatus for engineering colleges and technical institutes. Every unit is built for classroom durability, measurement accuracy and long-term reliability, backed by responsive after-sales support.
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Frequently Asked Questions
Q1. What does the Critical Radius Of Insulating Material apparatus demonstrate?
It demonstrates that heat loss from an insulated cylindrical pipe is maximum at a particular critical insulation radius.
Q2. How many pipes are used and how are they different?
Four GI pipes with internal heaters are used, each insulated with plaster of Paris to a different thickness.
Q3. How is critical radius defined in this experiment?
The critical radius is shown to be the ratio of the insulation's thermal conductivity to the outside heat transfer coefficient.
Q4. How is heater input measured?
A common voltmeter and ammeter measure the input power to each heater, controlled individually by dimmerstats.
Q5. What utilities are required to operate the apparatus?
It requires a 230V, 5A AC supply with earthing connection and a floor area of approximately 1m x 1m x 1.5m height.
Request a Quote
For pricing, specifications or export documentation on the Critical Radius Of Insulating Material apparatus, contact Lab Exports for a detailed quotation.