05 part3 heating value

05 part3 heating value

1. Heating value
S.Gunabalan
Associate Professor
Mechanical Engineering Department
Bharathiyar College of Engineering & Technology
Karaikal - 609 609.
e-Mail : [email protected]

2. Heating value
The heating value (or energy value or calorific
value) of a substance, is the amount of heat
released during the combustion of a specified
amount of fuel.
It is measured in units of energy per unit of the
substance, kJ/kg,
Heating value is commonly determined by use
of a bomb calorimeter.

3. heat of combustion
The heat of combustion is the energy released
as heat when a compound undergoes complete
combustion with oxygen under standard
conditions.

4. Heating values
•The higher heating value (HHV), (also known as the
gross calorific value or gross energy) of a fuel is defined
as the amount of heat released by a specified quantity
(initially at 25 °C) of fuel, it is combusted and the
products have returned to a temperature of 25 °C.
•The higher heating value takes into account the latent
heat of vaporization of water in the combustion
products,
•Or Lower calorific value (LCV)) is determined by
subtracting the heat of vaporization of the water vapor
from the higher heating value.

5. Reference
•Moran, M. J. 2011. Fundamentals of engineering thermodynamics. Wiley,
[Hoboken, N.J.?].
•Rajput, R. K. 2010. Engineering thermodynamics. Jones and Bartlett
Publishers, Sudbury, Mass.
•Nag, P. K. 2002. Basic and applied thermodynamics. Tata McGraw-Hill, New
Delhi.