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Cryogenic Equipment

NRS(Nitrogen Refrigerant System) Package

The NRS® package is an essential reliquefaction system for LNG carriers. It integrates reliquefaction and fuel supply functions to provide optimal efficiency.
This improves both individual product performance and overall system efficiency.

System Diagram and Main Product

  1. 1Low Pressure FG Compressor
    Frame : SE45G/4
    Simple GMS configuration
    Relatively low pressure for re-liquefaction
    Relieves burden for extremely high pressure
  2. 2Cryogenic Heat Exchanger
    Brazed Aluminum Heat Exchanger
    Widely used type in the liquefaction industry
    Optimized design for 4 stream heat exchanger
    High efficiency by recovering cold BOG energy
  3. 3N₂ Compander
    Frame : SE-45N/4
    3-stage centrifugal compressor
    Single-stage expander
    Widely used technology in the industry
    Supplies main cold power to NRS
    through the Reverse Brayton Cycle
  4. 4Nitrogen Refrigerant
    Easy to obtain on the ship
    Environmentally safe
    N₂ Inventory Tank for Load control
    Minimize refrigerant loss by recovery

Hanwha Power Systems NRS® Package Line-up

  • NRS - 1.5BOG 1.9 TPH
  • NRS - 1.8BOG 2.3 TPH
  • NRS - 2.3BOG 2.8 TPH
  • NRS - 3.1BOG 3.7 TPH
  • NRS - 3.5BOG 4.1 TPH
Total BOG Treatment
Hanwha Power Systems NRS® Package Line-up
NRS
Line-up		 BOG
Generated
(TPH)		 Fuel Gas
@Anch.
(TPH)		 Reliq.
Amount
(TPH)		 Cargo
Containment
System
1.5TPH 1.9 0.4 1.5 New CCS
1.8TPH 2.3 0.5 1.8 NEXT1
2.3TPH 2.8 0.5 2.3 Super+
3.1TPH 3.7 0.6 3.1 L03+
3.5TPH 4.1 0.6 3.5 GW

Pilot Test

  • NRS Pilot Test for LNG Carrier(Oct, 2021)
  • The Pilot Test has been Successfully Completed
  • Cryogenic Heat Exchanger Skid
  • Nitrogen Compander Skid

Major Reference

NRS-N₂ Compander, NRS-Cryogenic Heat Exchanger, NRS - BOGC, NRS - FGC

Cargo Handling Equipment(LD/HD)

Fuel Gas Compressor(Low Duty Compressor)

  • 2-stage(medium pressure) and 4-stage(high pressure) solutions based on vessel conditions
  • Ship-Class Certification for Marine Application(DNV / ABS)
  • Products meeting API 617/614/671 and specific customer requirements(e.g., Oil-free sealing system)
  • High-efficiency, high-reliability product lineup for various vessel types and processes

Line-up

Fuel Gas Compressor(Low Duty Compressor) Line-up
Items Unit LDC1 LDC2
Fluid - CH₄ 92%, N₂ 8%
Flow ㎥ / hr 2,500 ~ 4,500 2,000 ~ 5,000
Inlet Pressure bar A 1.03
Inlet Temperature ℃ -120
Design Temperature ℃ -196
Outlet Pressure bar A 6.5(2Stage) 13(4Stage)

Vapor Return Compressor(High Duty Compressor)

  • Smooth return function across diverse conditions through a wide operating range
  • Total solutions provision through auxiliary equipment
    (Vaporizer, heater, separator)
  • High reliability and reduced maintenance through integrally geared compressors
  • High-efficiency, high-reliability product lineup tailored to customer processes

Line-up

Vapor Return Compressor(High Duty Compressor) Line-up
Items Unit HDC1 HDC2
Flow ㎥ / hr 35,000 31,000
Inlet Pressure bar A 1.03 1.03 ~ 1.25
Inlet Temperature ℃ -140.0
Outlet Pressure bar A 2.0

Cargo Tank Warm-up Compressors & Instrument Air Compressors

Compressors for FLNG

  • Optimal product design for FLNG maritime platforms
  • Solutions optimized for customer installation environments
  • Offshore Certification applied(including DNV class certification)

Major Reference

Warm-up Compressor
Location :Mozambique
Application :LNG production, storage, and loading facilities(direct LNG transport without subsea pipelines)
Project Status :In commercial operation(2022 ~)
Model Names :SE-32G/1
Application Process :Cargo Tank Warm-up(Maintenance/Heat-up purposes)
Installation Locations : Hull Deck
Instrument Air Compressor
Location :Mozambique
Application :LNG production, storage, and loading facilities(direct LNG transport without subsea pipelines)
Project Status :In commercial operation(2022 ~)
Model Names :SE-45A/3
Application Process :Instrument & Plant Air Supply
Installation Locations : Machinery Space