The LO cooler is constructed as which type of heat exchanger?

The LO cooler is constructed as which type of heat exchanger?

• A. Plate and frame
• B. Air-cooled
• C. Water-cooled
• D. Shell and tube

Answer: (D)

The LO cooler uses a shell-and-tube heat exchanger. In this setup, hot lubricating oil flows through tubes while the cooling fluid (typically water or glycol) goes around the tubes in the shell, or the opposite. This design provides a large heat-transfer area, handles the relatively high flow and temperature of lube oil, and is robust and easy to service—fouling can be managed without replacing the whole unit. Plate-and-frame is smaller and less suited for the heavy-duty, dirty oil service, and air-cooled setups rely on ambient air rather than a coolant loop, while water-cooled describes the coolant, not the exchanger type.

The LO cooler uses a shell-and-tube heat exchanger. In this setup, hot lubricating oil flows through tubes while the cooling fluid (typically water or glycol) goes around the tubes in the shell, or the opposite. This design provides a large heat-transfer area, handles the relatively high flow and temperature of lube oil, and is robust and easy to service—fouling can be managed without replacing the whole unit. Plate-and-frame is smaller and less suited for the heavy-duty, dirty oil service, and air-cooled setups rely on ambient air rather than a coolant loop, while water-cooled describes the coolant, not the exchanger type.