B777 Undifferentiated or Other Model
Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine
Communication Breakdown
Deviation / Discrepancy - Procedural Hazardous Material Violation; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter Fuel Issue
Flight Crew Overcame Equipment Problem; General Maintenance Action
Human Factors
Hazmat paperwork said that there was dry ice in the lower forward cargo area; so FCAC (Forward Cargo A/C) should be 'on'.  I turned it on right after I signed the paperwork.  I did not check to make sure there was a note on the release referencing this; to account for an extra 500 pounds of fuel burn enroute.  We discovered my mistake while trying to determine why we were burning more fuel than expected.  Most of it was due to winds; and we landed with plenty of gas; but 2;500 below plan.  We called operations to alert them and ask for how much extra fuel we should expect to burn and they said a little over 500 pounds; so it was not an issue.  The other 2000 pounds was for winds stronger than forecast; to the best of my knowledge.  Operations also said that it was the responsibility of ZZZZ Ramp to let them know about the dry ice so they could plan the fuel more accurately; but someone forgot to let them know. Failure of the ZZZZ Ramp to keep Operations informed of the dry ice in the lower forward cargo area.  Failure of the Captain (myself) to make sure there was a note on the FP/R for FCAS 'on'.
B-777 Captain reported a communication breakdown between flight crew and dispatch regarding additional fuel required due to Dangerous Goods in the cargo compartments.