# Student Central

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## 'Thermodynamics' and 'Heat Transfer'

• #### 1.  'Thermodynamics' and 'Heat Transfer'

Posted 08-24-2019 16:07
Difference between 'Thermodynamics' and 'Heat Transfer'
Thermodynamics and Heat Transfer both are part of
thermal engineering and each has its own meaning and
importance. Both deals with heat and energy then, one
might ask, what is the real difference between the two
subjects ? i.e. Thermodynamics and Heat Transfer
"Thermodynamics" deals with the amount of energy in
form of heat or work during a process and only considers
the end states in equilibrium. It will not give information
about how long it will take to reach to the final state in
equilibrium. While,
"Heat Transfer" deals with the rate of energy transfer thus,
it gives idea of how long a heat transfer will occur? Heat
transfer deals with time and non equilibrium phenomena.
Heat can only transfer when there is a temperature
gradient exists in a body and which is indication of non
equilibrium phenomena.
In short, Thermodynamics gives "Why" a process will
occur and Heat Transfer will tell, "How" a process will
occur when there is a concern about transfer of heat.
To support all these arguments, Thermodynamics uses
following laws,
Zeroth Law of Thermodynamics
First law of Thermodynamics
Second Law of Thermodynamics
Third Law of Thermodynamics
While, Heat Transfer uses,
Fourier's Law (Heat conduction)
Newtons Law of Cooling (Heat convection)