Fabricated Enclosures Protect Standby Power Generating Stations

These special custom enclosures and fuel tanks meet the environmental and acoustic specifications of the water treatment facility required for three Cummins 2 MW generators powered by 16 cylinder QSK 60 series diesel engines.

The only existing water treatment plant in the City of Broken Arrow, Oklahoma, erected in 1966, could no longer satisfy the needs of its 35,000 homes and businesses. This required the City to purchase water from other facilities and nearby Tulsa.

In cooperation with the Oklahoma Department of Environmental Quality and the Oklahoma Water Resources Board, a new municipal water treatment plant on the shore of the Verdigris River will provide up to 20 MGD (plant rating at 20 deg C) of water daily to the City of Broken Arrow, Oklahoma.

This project began in early 2012 with the bid for the standby power system awarded to Cummins Southern Plains, LLC (Tulsa, OK) for the parent company based in Arlington, Texas. The project will utilize three 2 MW generators powered by Tier II emission certified Cummins 16 cylinder QSK 60 series diesel engines.

Due to the environmental and acoustic specifications of the water treatment facility, special enclosures and fuel tanks for the generator sets were required. Cummins sales representative Mike Teague asked Hennig Enclosure Systems, a division of Hennig Inc. (Machesney Park, IL), to provide a possible solution.

This division manufactures innovative enclosures and fuel tanks for standby/ emergency/ prime power/ peak shaving generators and switchgear. Their enclosures are designed and built to provide environmental protection and meet the demanding acoustical requirements of power generation equipment.

As Teague explained, “Al Grabowski (from Hennig) had already been in contact with Cummins, so we gave him the opportunity to quote the project and were quite pleased with the results.” Cummins provided the performance characteristics of the generator sets to Hennig, which then provided submittal drawings of the enclosure packages in Solid Works CAD format for the customer to review.

Each enclosure measured 40 ft long x 10 ft wide and nearly 14 ft high to allow ample airflow and provide a 25 dba sound reduction. After the customer and contractor approved the drawings, Hennig began cutting and bending steel in its shop, which manufactured the entire enclosure and fuel tank in addition to mounting the genset and landing all the electrical connections for the customer.

The enclosure involved a topcoat finish of TGIC polyester powder coat paint for weather resistance and UV protection. Grabowski noted that “A durable powder coat finish is utilized along with stainless steel hardware on every enclosure we build to meet the broad range of environmental conditions across the United States. These enclosures should look as good in 20 years as they do on the day they are installed.”

A few weeks after the generator sets arrived at Hennig, the enclosure and fuel tank packages were ready to ship. There were some logistics challenges on this project, as the facility site was in the midst of construction.

Delivery was made down a temporary dirt road and the three 2 MW Cummins emergency power generators were set in place without a hitch at the new Broken Arrow Water Treatment facility site.

The Broken Arrow municipal water treatment facility is primarily funded by loans totaling $64.8 million, administered by the Oklahoma Department of Environmental Quality and the Oklahoma Water Resources Board. The facility is being constructed by Crossland Heavy Contractors (Columbus, KS). The first phase of the project became operational in July, 2013.

Hennig, Inc. designs and produces custom machine protection and chip/coolant management products for state-of-the-art machine tools that protect against corrosion, debris and common workplace contaminants. Manufacturing facilities are located in the U.S., Germany, France, Brazil, India, Japan, Czech Republic, England and South Korea. Repair centers are located in Machesney Park; Chandler, OK; Livonia, MI; Blue Ash, OH; Mexico Cityand Saltillo, Mexico.

Cummins Southern Plains LLC, 525 E. Skelly Drive, Tulsa, OK 74116, 918-234-3240, www.cummins-sp.com.

Hennig, Inc., 9900 N Alpine Road, Machesney Park, IL 61115, 815-636-9900, www.hennig-inc.com.