Template:Heats of Combustion Data Section
Only available in Build 139 or later. For Build 138 or earlier, refer to Heating Values. These will only be shown if the user has chosen to display the HeatsOfCombustion Properties on the Plant Model - Views tab page or from the [[Material_{{{type}}}_Section#Qo_.28Qxxxx.29_Tab_Page|Include Properties]] dropdown list on the first page of the material {{{type}}} section.
The Heat of Combustion is the heat released (i.e. enthalpy change) if the {{{UnitOp}}} components undergo complete combustion with oxygen to produce carbon dioxide gas and water. The higher heating value (HHV) (or Gross Calorific Value) is calculated by assuming that the water produced is liquid water. The lower heating value (LHV) (or Net Calorific Value) is calculated by assuming that the water is produced as steam.
NOTE:
- The Heat of Combustion is only calculated for components which contain only carbon (e.g. carbon solid), only hydrogen (e.g. hydrogen gas) or only carbon and hydrogen (i.e. a hydrocarbon, e.g. methane (CH4)).
- Components which contain only carbon and oxygen (e.g. carbon monoxide) and only carbon, hydrogen and oxygen (e.g. ethanol) are also included.
- If oxygen gas and/or carbon dioxide gas are not included in the project then the following numbers will be assumed when calculating the heat values (all values are at 298K).
Species Heat of Formation (Hf) (kJ/mol) Heat Capacity (Cp) (J/K.mol) Oxygen (O2(g)) 0 29.379 Carbon Dioxide (CO2(g)) -393.8 37.171
- Reference:The Properties of Gases and Liquids, 4th Edition (Reid, Prausnitz and Poling)
|- |font style="background: #ebebeb" colspan="3" | HoC (Heats of Combustion) |- |HHV.M150 || font style="background: #ebebeb" |Calc || Higher Heating Value - Heat released if the {{{UnitOp}}} components undergo complete combustion with oxygen to produce carbon dioxide gas and liquid water at 150°C and 1 atmosphere pressure on a mass basis. |- |HHV.M25 || font style="background: #ebebeb" |Calc || Higher Heating Value - Heat released if the {{{UnitOp}}} components undergo complete combustion with oxygen to produce carbon dioxide gas and liquid water at 25°C and 1 atmosphere pressure on a mass basis. |- |HHV.Ml25|| font style="background: #ebebeb" |Calc || As above except on a molar basis. |- |HHV.V25 || font style="background: #ebebeb" |Calc || As above except on a volumetric basis. NB Gas mass per volume calculated at 25°C and {{{UnitOp}}} pressure. |- |HHV.M || font style="background: #ebebeb" |Calc || Higher Heating Value - Heat released if the {{{UnitOp}}} components undergo complete combustion with oxygen to produce carbon dioxide gas and liquid water at the {{{UnitOp}}} temperature and pressure on a mass basis. |- |HHV.Ml|| font style="background: #ebebeb" |Calc || As above except on a molar basis. |- |HHV.V || font style="background: #ebebeb" |Calc || As above except on a volumetric basis. NB Gas mass per volume calculated at the {{{UnitOp}}} temperature and pressure. |- |LHV.M150 || font style="background: #ebebeb" |Calc || Lower Heating Value - Heat released if the {{{UnitOp}}} components undergo complete combustion with oxygen to produce carbon dioxide gas and steam at 150°C and 1 atmosphere pressure on a mass basis. |- |LHV.M25 || font style="background: #ebebeb" |Calc || Lower Heating Value - Heat released if the {{{UnitOp}}} components undergo complete combustion with oxygen to produce carbon dioxide gas and steam at 25°C and 1 atmosphere pressure on a mass basis. |- |LHV.Ml25|| font style="background: #ebebeb" |Calc || As above except on a molar basis. |- |LHV.V25 || font style="background: #ebebeb" |Calc || As above except on a volumetric basis. NB Gas mass per volume calculated at 25°C and {{{UnitOp}}} pressure. |- |LHV.M || font style="background: #ebebeb" |Calc || Lower Heating Value - Heat released if the {{{UnitOp}}} components undergo complete combustion with oxygen to produce carbon dioxide gas and steam at the {{{UnitOp}}} temperature and pressure on a mass basis. |- |LHV.Ml|| font style="background: #ebebeb" |Calc || As above except on a molar basis. |- |LHV.V || font style="background: #ebebeb" |Calc || As above except on a volumetric basis. NB Gas mass per volume calculated at the {{{UnitOp}}} temperature and pressure.