Lower calorific value (lcv) or net calorific value (ncv), Biology

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It is defined as the amount of heat liberated when one unit mass of fuel is burnt and the products of combustion are allowed to escape.

                                 LCV = HCV - latent heat of water vapour formed

Since, 1 part by mass of hydrogen gives 9 parties by mass of water

                                 LCV = HCV - (Mass of H2 in fuel * 9* latent heat of steam)

                                 LCV = HCV - (H * 9 * 587 kcal/kg.)

or                              LCV = HCV - (0.09 H * 587) KCAL/KG.

where, H is percentage of hydrogen in fuel.

 

 


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