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Natural Convection
Natural Convection

Natural Convection

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Product Description

Heat Transfer by Natural Convection

1. To determine the overall heat transfer coefficient at the surface of a given vertical metal cylinder by the natural convection method.
2. To determine the value of Nusselt number.


Natural convection heat transfer is extensively used in the following areas of engineering:
1. Cooling of commercial high voltage electrical power transformers.
2. Heating of houses by electrical baseboard heaters.
3. Heat loss from steam pipe lines in power plants and heat gain in refrigerant pipe lines in air conditioning applications.
4. Cooling of reactor cores in nuclear power plants, though often the coolant is driven by pumps, resulting in more efficient heat transfer by forced convection.
5. Cooling of electronic devices (chips, transistors) by finned heat sinks, though a fan is often present to augment the natural convection with forced convection.

  • Metal bar – Copper, 25 mm O.D., approx. 430 mm long with insulation shell along the length and water cooled heat sink at the other end.
  • Test length of the bar – 240 mm.
  • Thermocouples – Chromel /alumel, 10 nos.
  • Band Nichrome heater to heat the bar.
  • Dimmerstat to control the heat input – 2A, 230 V.
  • Voltmeter and Ammeter to measure the heater input.
  • Multichannel Digital temperature indicator, 0.1°C least count, 0-200°C with channel selector switch.
  • Measuring flask to measure water flow.

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Elshaddai Engineering Equipments

Natural Convection

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Ashok Nagar, Chennai
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Natural Convection

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