Abstract: A novel method and system for liquefying and distilling natural gas into high purity liquid methane (LNG) and NGL product streams. Heat exchangers and distillation towers are configured to produce high purity liquefied natural gas (LNG) and NGL product streams, while also rejecting excess nitrogen contained in the inlet gas stream, utilizing liquid nitrogen as the process refrigerant.

Abstract: A system for offshore liquefaction of natural gas and transport of produced liquefied natural gas using a moored floating production storage and offloading vessel, fluidly connected with a flexible conduit to a moored floating disconnectable turret which can be connected and reconnected to a floating liquefaction vessel with onboard liquefaction unit powered by a dual fuel diesel electric main power plant.

Abstract: A method for offshore liquefaction of natural gas and transport of produced liquefied natural gas using a floating production storage and offloading vessel, fluidly connected with a flexible conduit to a moored floating disconnectable turret which can be connected and reconnected to a liquefaction vessel with onboard liquefaction unit powered by a dual fuel diesel electric main power plant of the liquefied natural gas transport vessel.

Abstract: Method for processing, treatment and liquefaction of natural gas proximate offshore gas fields with a gas floating production storage and offloading vessel with a primary processing unit, a gas treating unit, and a natural gas compressor. The liquefaction is split between a liquefied natural gas transport vessel moored on a disconnectable turret and the floating production storage and offloading vessel. High pressure liquefied natural gas inlet quality gas from the vessel is sent through conduits to the liquefied natural gas transport vessel(s) then back through the disconnectable turrets to the vessel. A separate nitrogen refrigerant on the transport vessel provides final stage liquefaction while being powered by the transport vessel's propulsion plant. When the transport vessel is full, the transport vessel disconnects from the disconnectable turret, and motors to a transfer terminal located in sheltered water for transfer of liquefied natural gas cargo to a standard trading tanker.

Abstract: A heat exchanger comprises a first tube having a first fin of a first predetermined height extending outward therefrom. A second tube is vertically spaced above the first tube. The second tube has a second fin of a second predetermined height extending outward therefrom. A fan is positioned to force ambient air across the second tube and then across the first tube to heat a fluid flowing therethrough. A method of heating a fluid comprises sequentially flowing the fluid upward through a plurality of vertically spaced rows of substantially horizontal tubes, and forcing air downward over the plurality of tubes to heat the fluid.