Heating Value

Heating Value is defined as the amount of energy released when a fuel is burned completely in a steady-flow process and the products are returned to the state of the reactants. The heating value is dependent on the phase of water/steam in the combustion products. If H2O is in liquid form, heating value is called HHV (higher Heating Value). When H2O is in vapor form, heating value is called LHV (Lower Heating Value).
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