Eldridge Storm Guard Hood

US Patent 7,708,625

Published: May 4, 2010

What does the Storm Guard Hood do?

The US patented Eldridge Storm Guard Hood prevents the entrainment of water through the machinery space ventilation fans on a Mobile Offshore Drilling Unit (MODU) or any kind of offshore vessel. Rainwater and wash down overspray has always been a problem for the safe operation of equipment and personal safety on an offshore vessel.

The Storm Guard Hood is the best protection against equipment damage and personnel injury available today. Eldridge engineers came up with the Storm Guard Hood solution so that it not only takes up far less projected deck space, but also blows the performance of the old mushroom hoods out of the water!

Traditionally, marine mushroom hoods were used to keep water out of the ventilated machinery spaces on an offshore drilling rig. When designed correctly, mushroom hoods become very large in diameter. Adding a bird screen to a mushroom hood also increases its the overall diameter by 20% to make up for the added air velocity acceleration and backpressure caused by the screens. Furthermore, large diameter mushroom hoods make it very difficult for cranes to get any other equipment nested in close to the fan deck coamings.

On an offshore drilling rig where deck space is at a premium, the traditional mushroom hood solution is bulky and cumbersome.

The Storm Guard Hood solves the oversized mushroom hood problem of the past by having a smaller projected “footprint” on the deck of a MODU/marine vessel.

From a performance point of view, the Storm Guard Hood is so dependable that you can shoot a fire hose at it and water still won’t get in. (Yes, we actually did that during testing!)

How does the Storm Guard Hood work?

Our patented Storm Guard Hood uses the Eldridge Vertical Storm Louvers to create smaller but slightly taller weather hoods. The louver blades are spaced close together vertically. There are turbulators on the interior surfaces of the blades that change the direction of the airflow and collect the driven water. Water free falls to the bottom of the louver and drains out on to the deck.

TStorm Guard Hoodshe Vertical Storm Louvers’ water eliminating and construction features make them superior to any other louver on the market. Our hood is all seal welded rather than bolted or sheet metal screwed together. The louvers are also all welded construction of 0.125” thick extruded aluminum and treated with a one-hour clear anodized finish, making them as effective as 316 stainless steel and virtually impervious to salt corrosion.

We can add a down flood closure to the interior of the Eldridge Storm Guard Hood that is manually or motor driven. We can also acoustically treat the hoods for critical noise abatement for applications.

Although the Storm Guard Hood and Vertical Storm Louvers were originally developed for offshore ventilation applications, we have used it across various markets. For example, it is currently used on critical electric motor cooling systems such as the GE 752 High Torque Motor.

The performance of the Eldridge Storm Guard Hoods with our Vertical Storm Louvers is very accurate and repeatable. We input their performance in our Fluid Flow Analysis program in order to engineer and design ventilation systems with an expected end result guarantee from an airflow, pressure drop, and noise reduction standpoint.

How can I get one installed at my location?

We’ve seen imitations of the patented Eldridge Storm Guard Hood crop up around the world. In fact, we’ve been called to replace the knock-off versions numerous times.

However, the best way to guarantee your offshore vessel’s ventilation system will work to your expectations is to contact Eldridge. Eldridge owns the tooling and dies for the Vertical Storm Louvers and we control the manufacturing of each Storm Guard Hood from beginning to end. We do not compromise on performance or quality.

Don’t let your company waste money on imitations. Request a quote today and work with a trusted Eldridge Engineer to meet your needs.