Abstract: A first liquefied hydrocarbon stream is provided from a first source and a second liquefied hydrocarbon stream is provided from a second source. The second liquefied hydrocarbon stream has been liquefied by cooling solely against a first cooled nitrogen-based stream. The first and second liquefied hydrocarbon streams are gasified to produce a gasified hydrocarbon stream, thereby cooling a gaseous nitrogen-based stream against the gasifying first and second liquefied hydrocarbon streams to provide a second cooled nitrogen-based stream.

Abstract: A first liquefied hydrocarbon stream is provided from a first source and a second liquefied hydrocarbon stream is provided from a second source. The second liquefied hydrocarbon stream has been liquefied by cooling solely against a first cooled nitrogen-based stream. The first and second liquefied hydrocarbon streams are gasified to produce a gasified hydrocarbon stream, thereby cooling a gaseous nitrogen-based stream against the gasifying first and second liquefied hydrocarbon streams to provide a second cooled nitrogen-based stream.

Abstract: Controlling the production of a liquefied natural gas comprising measuring the temperature and the flow rate of the liquefied natural gas; maintaining the flow rate of the heavy mixed refrigerant at an operator manipulated set point; and determining the flow rate of the light mixed refrigerant from the flow rate of the heavy mixed refrigerant and an operator manipulated set point for the ratio of the flow rate of the heavy mixed refrigerant to the flow rate of the light mixed refrigerant; determining a dependent set point for the ratio of the flow rate of the liquefied natural gas to the flow rate of the heavy mixed refrigerant such that the temperature of the liquefied natural gas is maintained at an operator manipulated set point; determining a dependent set point for the flow rate of the liquefied natural gas from the dependent set point for the ratio of the flow rate of the liquefied natural gas product stream to the flow rate of the heavy mixed refrigerant and the flow rate of the heavy mixed refrigerant

Abstract: Controlling the production of a liquefied natural gas (31) comprises measuring the temperature (50) and the flow rate (55) of the liquefied natural gas (31); maintaining the flow rate of the heavy mixed refrigerant (60a) at an operator manipulated set point (80), and determining the flow rate of the light mixed refrigerant (86) from (i) the flow rate of the heavy mixed refrigerant (80) and (ii) an operator manipulated set point for the ratio of the flow rate of the heavy mixed refrigerant to the flow rate of the light mixed refrigerant (81); determining a dependent set point (91) for the ratio of the flow rate of the liquefied natural gas to the flow rate of the heavy mixed refrigerant such that the temperature (50) of the liquefied natural gas is maintained at an operator manipulated set point (90); determining a dependent set point (95) for the flow rate of the liquefied natural gas (95) from (i) the dependent set point (91) for the ratio of the flow rate of the liquefied natural gas product stream to the f

Abstract: Controlling the production of a liquefied natural gas consist of measuring the temperature and the flow rate of the liquefied natural gas; maintaining the flow rate of the heavy mixed refrigerant at an operator manipulated set point, and determining the flow rate of the light mixed refrigerant from the flow rate of the heavy mixed refrigerant and an operator manipulated set point for the ratio of the flow rate of the heavy mixed refrigerant to the flow rate of the light mixed refrigerant; determining a dependent set point for the ratio of the flow rate of the liquefied natural gas to the flow rate of the heavy mixed refrigerant such that the temperature of the liquefied natural gas is maintained at an operator manipulated set point; determining a dependent set point for the flow rate of the liquefied natural gas from the dependent set point for the ratio of the flow rate of the liquefied natural gas product stream to the flow rate of the heavy mixed refrigerant and the flow rate of the heavy mixed refrigerant

Abstract: Controlling the production of a liquefied natural gas (31) comprises measuring the temperature (50) and the flow rate (55) of the liquefied natural gas (31); maintaining the flow rate of the heavy mixed refrigerant (60a) at an operator manipulated set point (80), and determining the flow rate of the light mixed refrigerant (86) from (i) the flow rate of the heavy mixed refrigerant (80) and (ii) an operator manipulated set point for the ratio of the flow rate of the heavy mixed refrigerant to the flow rate of the light mixed refrigerant (81); determining a dependent set point (91) for the ratio of the flow rate of the liquefied natural gas to the flow rate of the heavy mixed refrigerant such that the temperature (50) of the liquefied natural gas is maintained at an operator manipulated set point (90); determining a dependent set point (95) for the flow rate of the liquefied natural gas (95) from (i) the dependent set point (91) for the ratio of the flow rate of the liquefied natural gas product stream to the f

Abstract: Method of reducing the amount of components having low boiling points in liquefied natural gas comprising passing the liquefied natural gas at liquefaction pressure through the hot side of an external heat exchanger to obtain cooled liquefied natural gas, allowing the cooled liquefied natural gas to expand dynamically to an intermediate pressure and statically to a low pressure to obtain expanded fluid, and introducing expanded fluid into the upper part of a fractionation column provided with a contacting section arranged between the upper part and the lower part of the fractionation column; passing a direct side stream at low pressure through the cold side of the external heat exchanger to obtain heated two-phase fluid; introducing the heated two-phase fluid into the lower part of the fractionation column and allowing the vapor to flow upwards through the contacting section; allowing the liquid of the expanded fluid to flow downwards through the contacting section; and withdrawing from the lower part of the