Views: 0 Author: Site Editor Publish Time: 2026-05-12 Origin: Site
The CuNi 90/10 marine box-type cooler is a core cooling device for the main/auxiliary engines and hydraulic systems of tugboats. It utilizes a 90% copper + 10% nickel U-shaped tube bundle, directly installed in the sea chest on the hull side, relying on natural/forced convection cooling with seawater. It eliminates the need for seawater pumps, filters, and external piping, making it suitable for tugboats operating in narrow engine rooms, high-vibration conditions, and shallow/sand-laden seawater.
Structural Components: U-shaped tube bundle (CuNi 90/10), tube sheet, end caps (carbon steel/copper-nickel), sea chest grille, inlet/outlet pipes; no outer shell, the tube bundle is directly immersed in seawater.
Cooling Circuit: Fresh water/lubricating oil (cooled medium) flows inside the tubes, while seawater (cooling medium) flows outside; forced convection occurs during navigation, and natural convection heat exchange occurs when moored.
Installation Location: Inside the sea chest on the hull side, saving engine room space and fitting the compact layout of tugboats.
Typical Tugboat Applications:
Main Engine Cooling: Diesel main engine (e.g., Volvo Penta D6/D16, Caterpillar C32) freshwater/intercooler circuit.
Auxiliary Engines and Hydraulics: Generator, steering gear, bow thruster hydraulic oil cooling.
Operating Conditions: Shallow waters, silt, ice floes (anti-clogging, shock-resistant); low energy consumption (no seawater pump, energy saving 15–20%).
