Basic Concepts in Thermodynamics P M V Subbarao Professor Mechanical Engineering Department I I T...

Basic Concepts in Thermodynamics

P M V SubbaraoProfessor

Mechanical Engineering Department

I I T Delhi

Thorough Familiarization of Simple Premises…..

Heart as a Thermodynamics System

Operation of Left Ventricle

Cyclic Operation of Heart

Cyclic Operation of deceased Heart

LPG Stove

Schematic Diagram of LPG Stove

Electric Stove

Identification of Properties

• (a) Colour of a filament;

• (b) Age of a vehicle tire;

• (c) Life of a bulb ;

• (d) Specific heat of a solid;

• (e) Pressure;

• (f) Temperature;

• (g) heat;

• (h) Calorific value of a fuel.

Colour is due to Incandescence

Incandescence is the emission of light (visible electromagnetic radiation) from a hot body as a result of its temperature.

Spectral Analysis of Incandescent Filament

Age of A Vehicle Tyre

Made as Property

In the example above:DOT EJ8J DFM 408

DOT EJ8J DFM 408Manufactured during the 40th week of the year

DOT EJ8J DFM 408Manufactured during the 8th year of the decade

Tires Manufactured Before 2000

Made as Property

In the example above:DOT U2LL LMLR 5107DOT U2LL LMLR 5107 Manufactured during the 51st

week of the yearDOT U2LL LMLR 5107 Manufactured during 2007

Tires Manufactured Since 2000

Specific Heat : Is it a Property ? Or ……