Products

R.W. Fernstrum & Company

Keel Cooler & Boxcooler Sizing / Engineering

Custom sizing of GRIDCOOLER keel coolers and WEKA Boxcoolers from customer engine, coolant and vessel data.

Most GRIDCOOLER units are custom-sized, though Fernstrum keeps some stock models. Customers send a recommendation form listing the engine maker, model and rating (BHP or kW at rpm), engine type (propulsion, bow thruster or generator), emissions tier, gear, heat rejection, fresh-water flow rate and temperatures, antifreeze percentage, hull construction, hull speed at full power and maximum seawater temperature. Fernstrum's engineers then specify the cooler and quote it. Boxcoolers and OMEGA plates have their own recommendation forms.

Specifications

Inputs
engine make/model/rating, engine type & emissions tier, heat rejection, fresh water flow & temperatures, antifreeze %, hull construction, hull speed at full power, max seawater temperature

Listed under

More from R.W. Fernstrum & Company

R.W. Fernstrum & Company

GRIDCOOLER Keel Cooler – 90/10 Copper-Nickel

Keel cooler (external hull-mounted)

Hull-mounted rectangular-tube keel cooler in heavy-walled 90/10 CuNi with one-piece header, silver-brazed; enhanced interior tubing optional.

R.W. Fernstrum & Company

GRIDCOOLER Multi-Pass Keel Cooler

Keel cooler (multi-pass configuration)

Multi-pass GRIDCOOLER arrangement routing coolant through several tube passes; offered alongside the standard single-pass design.

R.W. Fernstrum & Company

GRIDCOOLER Stacked & Angled Tube Keel Coolers

Keel cooler (compact / stationary configurations)

Stacked units for more heat transfer in a smaller footprint; angled-tube units for side-mounted zero-knot or stationary duty.

R.W. Fernstrum & Company

WEKA Boxcooler (US-built)

Box cooler (sea-chest U-tube bundle)

Uncoated 90/10 CuNi sea-chest box cooler built in the US under Fernstrum's WEKA partnership; no coating or ICAF required.

R.W. Fernstrum & Company

WEKA Guard & WEKA Protector Type T

Box cooler galvanic/stray-current protection

Protection devices for WEKA Boxcoolers: Guard during construction, Protector Type T in service (Dual/Multi for shared sea chests).

R.W. Fernstrum & Company

OMEGA Laser Plate

Laser-welded pillow/immersion plate heat exchanger

Laser-welded, hydraulically inflated pillow plates in stainless, duplex, nickel alloys or titanium for closed-circuit heating and cooling.