Heat of Combustion Net
Gross heat of combustion minus the latent heat of condensation of any water produced
Heavy crude
Crude oil with a high specific gravity and a low API gravity due to the presence of a high proportion of heavy hydrocarbon fractions and metallic content
HHV
Higher heating value
Homogenizer
A mechanical device which is used to create a stable, uniform dispersion of an insoluble phase (asphaltenes) within a liquid phase (fuel oil).
HP
Horsepower