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About this document
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- 44 pages
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- $44 one-time, yours to keep
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- Subject
- Engineering, Physics
This document describes an experiment to determine heat transfer due to radiation and convection from a cylinder. It includes the aim, apparatus required, theory, experimental procedure, observations, and results. It does not mention a specific module or week.
What's inside
- Aim of the experiment
- Apparatus required
- Theory behind heat transfer by radiation and convection
- Experimental procedure
- Observations and results
Who it is for: Students studying heat transfer in engineering or physics. (Undergraduate)
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Summary
This is a lab report on heat transfer by radiation and convection. It shows how to measure heat transfer from a cylinder and how to calculate emissivity and natural convection coefficients.
Aim of the experiment
The experiment aims to determine heat transfer due to radiation and convection from a cylinder. It also aims to find emissivity at different temperatures and the natural convection coefficient.
Theory of heat transfer
The theory explains how heat transfers from a hot surface to cooler surroundings by natural convection and radiation. It shows how to calculate heat transfer coefficients for both processes.
Experimental procedure
The procedure describes how to prepare and heat a cylindrical specimen. It details how to record temperature changes as the cylinder cools. It also shows how to set up and use the apparatus.
Heat exchangers
This part describes heat exchangers, how they work, and how they are classified. It shows how to calculate heat transfer rates and overall heat transfer coefficients for different types of heat exchangers.
Key terms
- Nusselt number (Nu)
- A dimensionless number used to describe the ratio of convective to conductive heat transfer.
- Grashof number (Gr)
- A dimensionless number used in free convection to correlate the buoyancy and viscous forces.
- Prandtl number (Pr)
- A dimensionless number used to describe the ratio of momentum diffusivity to thermal diffusivity.
- Rayleigh number (Ra)
- A dimensionless number used in free convection to correlate the buoyancy and viscous forces and thermal buoyancy.
- Emissivity
- The ratio of the energy radiated by a surface to the energy radiated by a blackbody at the same temperature.
- Heat transfer coefficient
- A measure of the effectiveness of heat transfer between a surface and a fluid.
Questions this document helps with
- How do you calculate heat transfer by radiation and convection?
- What is the relationship between Nusselt, Grashof and Prandtl numbers?
- How do you find the emissivity of a surface?
Summary written with AI from the document's text.
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