Heat Transfer In Natural Convection Manufacturer,Supplier and Exporter in India
Product Code : EL-HTINC-7376
Jlab Export is a leading Heat Transfer In Natural Convection Manufacturer,and suppliers in India
Heat Transfer In Natural Convection (code EL-HTINC-7376) is a set-up for finding the average heat transfer coefficient of a heated vertical brass tube that loses heat to the surrounding air by natural convection. The tube stands inside a rectangular duct, open at the top and bottom, with a transparent acrylic window on one side so the arrangement stays visible. JLab produces this vertical-tube convection rig in Ambala, India.
Specifications
| Parameter | Detail |
|---|---|
| Test tube | Brass, fitted vertically, polished surface |
| Enclosure | Rectangular duct, open at the top and bottom |
| Viewing window | Transparent acrylic, on one side of the duct |
| Heater | Electric heating element inside the tube |
| Heat input control | Variac |
| Power measurement | Digital voltmeter and digital ammeter |
| Temperature measurement | Sensors on the tube; digital indicator with multi-channel switch |
| Electricity supply | 1 phase, 220 V AC, 2 A |
| Also needed | Table for set-up support |
| Quality check | Each rig is visually inspected before dispatch |
| Pack quantity | Each (sold individually) |
| Minimum order quantity | 1 unit |
| Dispatch time | Usually 14–18 working days |
| Product code | EL-HTINC-7376 |
| Manufacturer | Jain Laboratory Instruments Pvt Ltd (JLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
Why the Tube Sits in an Open Duct
Air warmed at the tube surface becomes lighter and rises, drawing cooler air in at the bottom of the duct and letting it out at the top. The duct shields this upward flow from room draughts, so the heat leaves by natural convection alone, and the polished brass surface keeps the share lost by radiation small.
Finding the Average Heat Transfer Coefficient
The variac sets the heater input, and at steady state Q = V × I from the digital meters. The tube sensors, read one by one through the multi-channel switch, are averaged to give the mean surface temperature Ts, and Ta is the temperature of the surrounding air. With the outer surface area of the tube A = πdL, the average coefficient is h = Q / [A (Ts − Ta)]. Repeating the test at other variac settings shows how h changes as the tube gets hotter.
Other Convection and Radiation Set-ups
- Natural Convection Apparatus — vertical brass pipe with a cartridge heater and an enclosure with one acrylic side.
- Heat Transfer In Forced Convection — blower-driven air through a heated pipe, for comparing h.
- Emissivity Measurement Apparatus — compares radiation from a test plate with a blackened plate.
The rig belongs to the Heat Transfer In Natural Convection group of Heat Transfer Lab Equipment.
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Last updated: 30 October 2026