T.Y. Lin International (TYLI) prepared a complete, multi-disciplinary design engineering, program management, and construction management package for the U.S. Army Corps of Engineers, Charleston District, for a 2MW diesel generator power plant at the U.S. Army Reserve Command (USARC) at the Barnes Road Naval Activity (formerly Roosevelt Roads Naval Station) in Ceiba, Puerto Rico. Services included technical and environmental analysis, plans, specifications, and permit applications. The generators are used to provide standby and prime power to eight, campus-style USARC buildings at the Barnes Road site.
The diesel generator plant comprised a 5,000-square-foot building to house four 455kW, 480V, Prime-rated open type diesel-generator units; a canopy to cover two external fuel storage tanks; interior fuel storage day tanks; paralleling switchgear with split bus and tie-breaker, and capacity for future micro-grid operation capability; controls for automatic transfer schemes; a canopy of a fuel transfer station; supporting structure for a truck scale; and supports for the fuel lines.
Based on TYLI’s design, electrical power is distributed from the generator plant to the Barnes Road Naval Activity site via two pad-mount 480V/13.2-kV step up utility liquid-type transformers, two 15-kV rated pad-mount switchgear with cross connect and back feeding capability, and a new 13.2kV 3-phase underground distribution feeder system. Transient voltage surge suppression (TVSS) was also provided at various points of the electrical system.
- The TYLI team calculated minimum, average, and maximum power demand value requirements to support the entire campus and to properly size the generators for generator efficiency.
- The design included a new standby electrical distribution system, including generators, paralleling switchgear, utility transformers and distribution switchgear, and 13.2kV 3-phase underground distribution system.
- Plant controls and power monitoring systems enabled the interface connection between existing metering systems at each facility and the new electrical standby power system.
- TYLI ensured that modifications to existing facility main electrical services were connected to the new electrical standby power system.
- A 5,000-square-foot building was designed to house the generators, day tanks, and paralleling switchgear. The generator building utilized a precast concrete facade for robust weather protection and long-term durability.
- Due to severe liquefaction settlement concerns, TYLI improved founding soils for the building through the use of a rammed, aggregate piers foundation system.