Gas hydrate/ice deposition from a dissolved water phase in a liquid condensate system was modeled using a mass and energy balance. The same modeling parameters were used to model three flow loop experiments (1.89 and 2.83 L/min flow rate deposition tests and a 139 L/min dissociation test) with acceptable accuracy. Relative changes in both temperature and pressure drop were modeled using an ice deposit with a 67% void fraction. (C) 2009 American Institute of Chemical Engineers AIChE J, 55: 1889-1897, 2009