Presentation on theme: "Notre Dame Power Plant. Power Plant produces Electricity Steam for heat Chill water for cooling Domestic cold water Domestic hot water Compressed air."— Presentation transcript:
Power Plant produces Electricity Steam for heat Chill water for cooling Domestic cold water Domestic hot water Compressed air for building controls
Co-generation plant We produce 400 psi superheated steam in our boiler then use the steam to turn turbine generators to produce electricity. We extract a portion of the steam at a lower pressure from the turbines. We then use the lower pressure steam again for heating, domestic hot water production,and chilled water production.
Co-generation plant We are produce about half of the electricity the campus uses on the average day
Extraction turbines have a steam condenser operating under a vacuum to condense the steam not extracted for other processes. The condensate (condensed steam) is returned to the boilers to produce steam again. The unused heat from the condensed steam is rejected to the lake. Before the water is returned to the lake it is cooled in 1 of 5 cooling towers Extraction turbines are able to meet variable steam load conditions and still maintain electrical production needs.
Back pressure units exhaust steam at a back pressure directly into a steam line. No condenser. No heat is sent to the lake. Not very flexible for load conditions. Must have some place for the steam to go. Electrical production varies with steam load conditions.
Conditions that rob plant efficiency Wrong boiler fuel to air ratio Water side boiler scale Fireside boiler slagging Turbine blade deposits Poor turbine blade condition Waterside steam condenser tube scale