![H.C.V.= (33800 C +144000 (H2 - O2/8) + 9270 S) KJ/Kg.
LCV=[HCV-(0.09H)587]Kcal/Kg {for Solid & liquid fuels}
{for gaseous fuels }
LCV=[HCV-(m x 587)]Kcal/m3 {for gaseous fuels }
v](https://image.slidesharecdn.com/calorific-190817083512/85/Calorific-Values-18-320.jpg)
Calorific Values
- 2. WHAT IS CALORIFIC VALUE….? hmm….. CALORIFIC VALUE..???
- 3. Uhh… The calorific value of a substance is the amount of energy that is released when burning a given amount of the substance. This energy is released in the form of heat, when the substance is burned in standard conditions. Calorific value is also known as .. HEAT OF COMBUSTION or ENERGY VALUE.
- 4. NOW.. It should be expressed too …… Expressed Joules/kilogram.
- 5. Why….. Joules and Kilogram only..?? It is expressed so because the energy of the material to be measured is a solid. How…... to measure the value ? a. Practically b. Theortically c. Both
- 6. a Practically measured by ……. . • The amount of fuel burned can be determined by difference in mass b . Theoritically (Shall be discussed further)
- 7. A is a type of constant- volume calorimeter used in measuring the heat of combustion of a particular reaction.
- 8. Every thing has types And so shall this be.
- 9. T Y P E S O F C A L O R I F I C V A L U E S
- 11. Higher calorific value Higher calorific value means the total quantity of heat liberated from combustion of unit mass or unit volume of given fuel when by products/side products are allowed to cool at room temperature.
- 13. Low calorific value Lower calorific value means the total quantity of heat liberated from combustion of unit mass or unit volume of given fuel when side products are allowed to escape.
- 14. Difference Main difference is in higher calorific value heat losses to cool down but in lower calorific value there is no heat because side products (ash,volatile matter etc) escapes.
- 15. Now… Measurement is also a factor Is’nt it?
- 16. There is a specific formula for everything . For calculating the calorific value of a fuel , a special formula has been introduced… Called DULONG’S FORMULA
- 17. Now calculation of HCV and LCV by Dulong’s formula
- 18. H.C.V.= (33800 C +144000 (H2 - O2/8) + 9270 S) KJ/Kg. LCV=[HCV-(0.09H)587]Kcal/Kg {for Solid & liquid fuels} {for gaseous fuels } LCV=[HCV-(m x 587)]Kcal/m3 {for gaseous fuels } v
- 19. Enough for now .. Thank you for listening. BYE