A New Liquefaction System That’s Better for the Environment and Community

HDR served as the owner’s engineer to upgrade CNG’s Rocky Hill, Connecticut, liquefaction plant, building upon several years of safely providing engineering services for CNG. The upgraded liquefaction system has a 4,300-horsepower motor-driven nitrogen recycle compressor to replace an aging natural gas turbine.

Our technical oversight kept the project on track, working alongside CNG through the bidding and selection process to bring the right engineer-procure-construct contractor on board. The upgraded liquefaction system adds efficiency and lowers emissions at the plant.