1) gross calorific value
2) higher heating value
in the case of solid and liquid fuels of low volatility, the heat produced by combustion of unit quantity, at constant volume, in any oxygen-bomb calorimeter under specified conditions GCV(I); HHV (2)
GRM: n. (1,2)
Note: on the contrary to the lower heating value, the water produced is assumed completely condensed and the heat recovered
References:
SEE low heat value
SEE lower heating value
SEE low calorific value
SEE net heating value
SEE net calorific value
SEE net specific energy

ENERGY TERM COURTESY OF ENERGY.EU