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a good fuel should have high calorific value
example it should produce large amount of heat on burning

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Which fuel has high calorific value ?Why is it so?

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1.this is done by comparing the calorific values of fuels with each other usually a fuel having higher calorific value is comparing to be a good fuel.

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this done by comparean calorific value of fuel with each other . his heating calorific value fuel.

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HIGH AND LOW CALORIFIC VALUE            calorific value are to types as:                  * high are gross  calorific value ( H. C.V )     or ( G.C.V)                                                         *low are net calorific value ( L.C.V) or                                          ( N.C.V).                                                               the calorific : the heat   required to raise  the temperature  of  one KG  of water  from 15degree to 16degee

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higher and calorific value(=gross calorific value _gcv =higher hearing value hhv)the water .

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a fuel is the made to react others material that can be  substances so that it releases a chemical as heat or to be used to burnt the any things

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It becomes clear from table given above that different fuels have different calorific values, i.e. different fuels produce different amounts of heat on burning.

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HIGH AND LOW CALORIFIC VALUE.                   calorific value are as two types;
high  or gross calorific value.(h.c.v or g.c.v)
low or net calorific value(l.c.v.or n.c.v)

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the heating value of fossil fuels may vary depending on the source and composition .2.4.1 energy density.energy density is the amount of energy per unit volume

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When fuels are burnt, heat is produced. The amount of heat produced by different types of fuels on burning is expressed in terms of calorific value.