Question

1.) Explain the practical significance of the heat conduction analysis on practical examples. Focus on the transient heat conduction. Give practical examples.

Answer 1

Heat transfer is a discipline of thermal engineering that concerns with the generation, use, conversion, and exchange of thermal energy or heat between physical systems.Heat transfer analysis is either steady state analysis or Transient state. Steady state heat transfer means there is no change in heat transfer with time but in transient analysis the heat transfer changes with time. heat transfer plays a key role in material selection, machinery efficiency and reaction kinetics etc.Engineers uses the detailed-level understanding of heat transfer to perform many tasks. For example, let's consider a car's engine.

In order to move the car, its engine needs energy. This energy is obtained from the combustion of fuel. Due to the combustion of gasoline or diesel ; converts the chemical potential energy stored in the fuel into kinetic energy. In that reaction, a large amount of heat is produced and transferred to the engine.On the otherhand If the engine gets too hot, its parts begin to break. In order to keep the engine at a more tolerable temperature, engineers designed a system called the radiator. Fluid in the radiator runs through the engine where heat is transferred into the fluid, which then travels back to the radiator where it is cooled before cycling back to the engine and thereby avoids the overheating.This is a simple example which shows the importance of heat transfer analysis.Similarly we can find a number of situations where heat transfer analysis become significant.

For the proper design and working of engines, power generation units, heat carrying equipments heat transfer analysis plays vital role.

various examples of transient heat conduction are heat exchangers, boiler tubes,Cooling of IC engine cylinder heads,heat treatment of engineering materials(Quenching, annealing etc), heating and cooling of buildings, food freezing etc.