Course Content
Lesson 2: Brief History of Refrigeration.
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Lesson 4: Introduction and Overview of Air-Conditioner & Refrigeration
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Lesson 8: Some Short Definitions Relative to HVAC
:- DBT :- WBT :- DPT :- RH :- Specific Humidity or Moisture Content :- Enthalpy :- Enthalpy Deviation :- Specific Volume :- Sensible Heat Factor :- Alignment Circle :- Pounds of Dry Air
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Lesson 9: Applied Psychrometry
Let us, now see how the various air conditioning procedures will be represented on a Psychometric chart.
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Lesson 10: Heat Load Estimation
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Lesson 11: Heat Load Calculation
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Lesson 12: Heat Load Calculation on Excel Sheet
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Lesson 13: Machine Selection
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Lesson 15: Air Distribution Terminal
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Lesson 16: How to Calculate Static Pressure
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Lesson 17: Kitchen Ventilation
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Lesson 18: Selection of AHU
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Complete Heating Ventilation & Air Conditioning Online Certificate Course In Hindi
About Lesson

Explain the Laws of Thermodynamics?

Zeroth Laws of Thermodynamics :- Zeroth laws of thermodynamic states that when two bodies are in thermal equilibrium with third body then they are also thermal equilibrium with each other.

First Laws of Thermodynamics :- First law of thermodynamic states that energy can neither be created nor be destroyed but it can be transform from one form to another form.

Second Law of Thermodynamics:- This law states that “all processes in nature tend to occur with an increase in entropy and the direction of change always lead to the increase in entropy.” 

This law states that there is a definite limit to the amount of mechanical energy, which can be obtained from a given quantity of heat energy.

or

Second Laws of Thermodynamics has two statements:-

According to Claussius, this law may be stated as “It is impossible for a self acting machine working on cyclic process, to transfer heat from a body at a lower temperature to a body at a higher temperature without the aid of an external agency”

The second law of thermodynamics has also been stated by Kelvin-Planck as “It is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy to work.” According to this statement, the second law of thermodynamics is sometimes called as law of degradation of energy.

Third Law of Thermodynamics:- The value of entropy of a completely pure crystalline substance is zero at absolute zero temperature.

 

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