%0 Journal Article
%T Development of Predictive Thermodynamic Model for Liquefaction of Natural Gas Using the C3-Mr Refrigeration Process
%A Dagde
%A Kenneth
%A K.
%A Okonkwo
%A Onochie
%A C.
%J International Journal of Engineering and Technology
%D 2012
%I IJET Publications
%X This paper presents a propane precooled mixed refrigerant (C3-MR) liquefaction plant with 4 pressure levels of propane cooling operational in Nigeria and demonstrates the procedure for developing a thermodynamic model that predicts the liquefied natural gas (LNG) production rate. The model prediction was validated with plant data with a maximum deviation of 3%. The thermodynamic efficiency of the natural gas liquefaction plant was estimated to be 45.1%. Simulations reveals that LNG production rate for the C3-MR plant depends on cooling water supply temperature (1  C rise results to 92 tonnes per day of LNG loss), thermodynamic efficiency of the overall liquefaction process (1% drop results to 215 tonnes per day of LNG loss), LNG outlet temperature (1  C decrease results to 108 tonnes per day of LNG loss), LNG production to feed gas supply ratio (1% rise results to 37 tonnes per day rise in LNG), thermal efficiency of gas turbine drivers (1% drop results to 277 tonnes per day of LNG loss), ambient air temperature (1  C drop results to 67 tonnes per day of LNG increase) and feed gas supply pressure.
%K natural gas
%K liquefaction
%K exergy
%K modeling
%K coefficient of performance
%K thermodynamic efficiency.
%U http://iet-journals.org/archive/2012/nov_vol_2_no_11/4734811347399.pdf