Gas Systems: Product Information
Small Scale & Mini
LNG Liquefaction
Systems
In the LNG plant, a closed nitrogen expansion loop provides the
Small scale & peak shaving plant
required cold duty to liquefy the natural gas. Nitrogen is
compressed in three stages with inter-stage cooling by air
LNG production: 10-12 k t/yr (30-500 t/day)
coolers, and expanded in a single-stage expander. The
refrigerant is kept in the gaseous phase throughout the cycle.
Hamworthy delivered a small scale LNG plant on an EPCIC
basis to Gasnor of Norway in 2003. The plant, named
Small scale LNG plants using this technology can be offered for
Snurrevarden LNG has:
capacities ranging from 30  500 tons per day.
A design capacity of 60 ton/day of LNG, that can be
turned down towards 0 ton/day without affecting the
calorific value of the produced LNG.
Unmanned operation with minimum need for inspection
outside the routine maintenance schedules. Start-up
from warm condition is done by one man in three hours.
After start-up in March 2003, the feasibility of the
technology and equipment has been proven during several
thousands hours of unmanned operation under varying
climate conditions.
The LNG plant receives pipeline-spec natural gas from the
main trunk line running from the North Sea offshore
platforms to one of the major gas treatment facilities in
Norway. Before liquefaction, substances that can solidify at
LNG-temperature are removed. The plant consists of the
following basic parts:
Natural gas dehydration unit
Natural gas CO2 removal unit
Snurrevarden plant at Karmły, Norway
Cryogenic cooling circuit
Main liquefier (cold box)
LNG storage tank and truck loading station.
Small Scale & Mini LNG Liquefaction Systems
Mini LNG plant Energy and cost effective modularized mini LNG plant with the
following features:
LNG production: 2-18 k t/yr (5-50 t/day)
Capacity 5 to 50 tons/day
Mini LNG plant for utilization of natural gas in areas without Modularized LNG plant, in frames
central pipeline distribution system. Gas coming from pipeline, Pre-treatment
local reservoir or landfills can be liquefied. Depending on the LNG liquefaction
source of gas, pre-treatment may be required before Gas engine
liquefaction. Storage
Truck terminal
Hamworthy has license right to the SINTEF developed and
patented system. Main advantages:
Using standard equipment for low investment cost and
fast manufacture of the liquefaction unit
Movable plant
Capacity of the plant can easily be adjusted
Refrigeration cycle with mixed refrigerant for low
energy demand
Fully instrumented pilot plant liquefying methane in a closed
circuit has been in operation since October 2003.
Production: 1 ton LNG/day
Long term test during autumn 2004 successful with two
months of continuous 24-7 fully automated operation.
Hamworthy Gas Systems AS
PO Box 144, NO-1371, Asker, Norway
tel: [phone]
fax: [phone] The manufacturers reserve the right to alter the
specification and data to incorporate improvements in design.
e-mail: [e-mail] Certified drawings will be issued on request.
web: www.hamworthy.com © All details copyright Hamworthy plc.
ref: HGS 3009 1106/2