Staten Island University Hospital (SIUH)
Staten Island, New York
PS&S/KeySpan Engineering Associates, in this signature project, developed a prototype 1.2 MW cogeneration plant for the SIUH South Campus facility to provide reliability of power and energy savings. The project demonstrates the technical and economic viability of small-scale, hospital-based cogeneration. The provision for recovering low-grade recompression steam and the electrical flexibility designed into the control system (including isolated as well as paralleling mode, auto-resynchronization, and peak shaving with a second unit) enhance the benefits of this plant class.
Three novel concepts were applied to enhance the usefulness of the basic cogeneration plant:
- Low-pressure steam compression during periods of low electric demand.
- Use of the plant as an emergency electric supply, operating either parallel with the grid or isolated from the grid.
- Peak shaving capability. One main engine and a high-speed backup/peak shaving engine can operate in the summer high-demand months in parallel with the grid.
SIUH was so pleased with the South Campus project that they hired us to design a 24MW cogeneration plant for their North Campus.