One Penn Plaza, one of the 10 largest commercial buildings in New York City, is a LEED-EB certified, 2.5 million square foot, 57-story building located above Pennsylvania Station, within one of the most constrained electrical grid systems in the US.
The goal was to build a state-of-the-art CHP system consisting of three 2.055 kWe reciprocating engines and three Heat Recovery Steam Generators (HRSGs), all housed in a sound-attenuated enclosure.
The GIE team tied the generators into the main building’s electrical services. Waste heat from the engines were then processed through the HRSGs to produce high pressure steam, which is then used to offset the building’s steam load. The steam load is used in summer months to cool the building with steam turbine chillers and in the winter months to preheat domestic water and condition the temperature of secondary water.
One Penn Plaza’s CHP system is the 1st synchronous electrical interconnection in the Con Edison service territory to rely on customer-side network protection. The CHP system achieves a combined efficiency of over 70%, double the efficiency of grid-supplied conventional power, resulting in a 40% reduction in the building’s electricity usage & carbon intensity. Additionally, the system has the ability to provide back-up power to tenants in the event of grid failure.