Call: 303. 421.8111   divider image   Request A Quote   divider image   Email Us
left side of blue design image

LNG Vapor Return Blowers

 Barber-Nichols, Inc. (BNI) manufactures LNG Vapor Return Blowers that can be custom designed for a wide variety of operating conditions. These blowers transfer boil-off-gas from large storage facilities onshore back to ships offshore while they are being unloaded. The boil-off-gas fills the void being created in the ship's tanks thereby preventing tank collapse and/or the introduction of oxygen into the system. BNI's Vapor Return Blowers are based on two basic configurations and provide a variety of benefits including simple, efficient, and reliable operation at temperatures exceeding -162 ° C (-260° F).

BOG Compressor SmallApplications that require more than 100 hp will require the large, heavy-duty compressor configuration pictured at the top of this page. Typically, the large, heavy-duty compressors are used when the volumetric flow rate exceeds 2,040 m3 /hr (1,200 cfm) or when the pressure rise exceeds 1.3 bar (4-5 psi). The small, hermetically sealed configuration (pictured to the right ) can be used when an application requires less than 100 hp. These smaller, simpler units are an attractive alternative for smaller applications.

Features & Benefits:

  • The Integrated Rotor, Shaft, & Impeller Improve Reliability & Simplify Maintenance
  • The Variable Frequency Drive (VFD) Optimizes Compressor Efficiency Across Variable Operating Conditions, Provides Overcurrent Protection, Reduces Power Consumption, and Facilitates Soft Start-Up & Shut-Down
  • The Ability To Operate At Cryogenic Temperatures Eliminates the Need For Heaters, Reduces Power Consumption, & Limits the Introduction of Heat Into the Ship's Storage Tanks
  • The Use of Class I, Div. II, Group D Electrical Enclosures Maximize Safety
  • The Oil-Lubrication System, Which Also Cools The Motor, Maximizes Equipment Life (Large Configuration Only)
  • The Integrated Sensor & Control System Optimizes Efficiency by Automatically Adjusting Speeds & Surge Control Valves and by Turning Compressors On & Off as Flow Rates Change (Large Configuration Only)

Case Study:

In 2000, Barber-Nichols designed and manufactured an LNG vapor return blower for a receiving terminal and power plant in Penuelas, Puerto Rico. Three 300 hp compressors piped in parallel process an extremely high, 2:1, volumetric flow rate. Each compressor is installed on its own baseplate along with a high-speed direct-drive electric motor, oil lubrication system, variable frequency drive, and associated piping and control system.