Engine Retrofit Reduces Compressor Station Emissions


Engine Emissions Optimization Retrofit


Central Pennsylvania


The client, one of the country’s leading energy providers, called on EN Engineering to provide engineering design services to support the installation of an engine emissions optimization retrofit with the goal of reducing emissions at their compressor station.


Congested below-grade piping was located via a subsurface survey of the area identified for installation of major equipment, and due to existing site layout constraints, the equipment could not be installed in any other area. In addition, because of weather issues, the team was unable to access detailed soil analyses and encountered shallow rock. Finally, due to incomplete historical records, the team was unable to access a full register of existing system air demands.


EN Engineering provided engineering design services to support the installation of an engine emissions optimization retrofit for one Cooper-Bessemer GMVA-8 recip and all ancillary equipment. In order to support this installation, various auxiliary systems underwent upgrades, including the fuel gas and compressed air systems, and a new auxiliary water cooling system was installed. The project required design of various foundations and replacement of an existing motor control center in addition to the fuel gas, water, and air system upgrades.

Because the team could not access detailed soil analyses, the foundation designs required revisions. The team reviewed past projects and used engineering judgment to devise foundation designs that were conservative yet not over engineered.

In addition, an existing air system analysis was completed based on limited information and input from station personnel because the team could not access a full register of existing air system demands. Using past projects and engineering judgement, the team revised the existing system analysis until it matched the existing operating conditions described by station personnel. This analysis was used as an accurate baseline for additions due to the requirement for completion of a full air system sizing evaluation.

The team compared existing drawings to subsurface investigation results obtained via ground penetrating radar to determine the locations and services of the buried lines, then worked with the client to identify which below grade lines could be relocated or retired, adjusting the equipment locations within the constraints to avoid those below grade lines that could not be disturbed. Despite these challenges, the installation was completed successfully and compressor station emissions were reduced.

The project required design of various foundations and replacement of an existing motor control center.

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