Higher Heating Value (HHV) (HHV)
Energy
Alternative Fuels
The heating value is the amount of heat released during the combustion of a specific substance, usually a fuel or food. The higher heating value is determined by bringing all the products of combustion back to the original pre-combustion temperature, condensing any water vapor generated. This value assumes the entire water component is liquid in the products of combustion and that heat can be used.
- — Alternative Fuels Data Center Glossary retrieved 2014-06-26
Renewable Energy
The maximum potential energy in dry fuel. For wood, the range is 7,600 to 9,600 Btu/lb.
- — ODOE Glossary of Energy Terms retrieved 2014-06-15
Science› Energy› Renewable Energy
Biomass
The heat produced by combustion of one unit of substance at constant volume in an oxygen bomb calorimeter under specified conditions. The conditions are: initial oxygen pressure of 2.0-4.0 MPa (20-40 atm), final temperature of 20°-35°C, products in the form of ash, liquid water, gaseous CO2 and N2, and dilute aqueous HCl and H2SO4. It is assumed that if significant quantities of metallic elements are combusted, they are converted to their oxides. In the case of materials such as coal, wood, or refuse, if small or trace amounts of metallic elements are present, they are unchanged during combustion and are part of the ash. Also known as gross heat of combustion.
- — Glossary of Biomass Terms retrieved 2014-06-15