R.W. Fernstrum Equipment Showcase
Stacked GRIDCOOLER® Keel Cooler
Two-tier (stacked or double-stacked) copper-nickel keel cooler that delivers more heat rejection in a smaller hull footprint — ideal for large engines and repowers.
Description
When hull space is limited or the cooling load is high, the Stacked GRIDCOOLER® Keel Cooler places tube banks one above another to reduce the footprint while increasing heat transfer. It is the go-to configuration for cooling larger engines, cutting the number of separate coolers on the hull, or fitting more capacity into an existing location during a repower.
Features
- Stacked or double-stacked rectangular 90/10 copper-nickel tube banks
- One-piece brazed headers with 56% silver braze; critical joints ultrasonically tested
- Available with Fernstrum's exclusive enhanced-interior tubing (up to 30% higher heat transfer)
- Compatible with single- and multi-pass flow and with E1, L, HD and Z options
- Closed circuit: no raw-water pumps, strainers or seawater piping
Typical applications
Tugs and towboats, push boats, ATBs, OSVs/PSVs, ferries and dredges with high-horsepower main engines or multiple gensets; repower projects where a larger engine must use the existing cooler location.
Specifications
| Type | Keel cooler (external, closed-circuit hull cooler) |
|---|---|
| Mounting | Externally on the hull below the waterline: recessed, external (faired) or side mounted |
| Max test pressure | 35 psi (2.41 bar) |
| Manufactured in | Menominee, Michigan, USA |
| Quality | ISO 9001:2015 (ABS QE Certificate 60149); Buy America compliant |
| Material | 90/10 copper-nickel |
| Design | Stacked / double-stacked tube banks |
| Benefit | Higher heat transfer per hull area; fewer units |
| Joints | 56% silver braze |
Documents
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