Natural gas liquefaction process using low level, high level and absorption refrigeration cycles

Patent · Tue Mar 27 04:00:00 EST 1990

OSTI ID:6777062

Davis, R N; Newton, C L

This patent describes an improvement in a process for the liquefaction of natural gas, wherein a natural gas feed stream is cooled and liquefied; refrigeration for the liquefaction process is provided by two closed loop refrigeration cycles; a first or low level refrigeration cycle, having a mixed (multicomponent) refrigerant heat pump fluid, cools and liquefies the natural gas feed stream; and the second or high level refrigeration cycle, having a mixed (multicomponent) refrigerant heat pump fluid, cools the low level heat pump fluid. The improvement, for increasing the energy efficiency of the process, comprises incorporation of an absorption refrigeration cycle to precool the natural gas feed, the low level heat pump fluid and the high level heat pump fluid.

• Assignee: NOV; EDB-90-106681; NOV-90-018083
• Patent Number(s): US 4911741; A
• Application Number: PPN: US 7-249044A
• OSTI ID: 6777062
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
030300* -- Natural Gas-- Drilling
Production
& Processing
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320303 -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Equipment & Processes
ABSORPTION REFRIGERATION CYCLE
EFFICIENCY
ENERGY EFFICIENCY
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
HEAT PUMPS
INDUSTRIAL PLANTS
LIQUEFACTION
NATURAL GAS
NATURAL GAS PROCESSING PLANTS
REFRIGERATORS
THERMOCHEMICAL PROCESSES