Retrofitting utility power plants for cogeneration and district heating

Conference · Sat Jan 01 04:00:00 EST 1983 · Proc. Am. Power Conf.; (United States)

OSTI ID:6650512

Kan, G T; Silvestri, G J

This paper describes a method of retrofitting an existing coal-fired generating unit to provide the capability for district heating. The technique involves the extraction of steam from turbine crossovers to heat water and modifications of the feedwater heating system. Backpressure turbine-generators are used to minimize the capacity losses of the unit. Seasonal extraction of steam for district heating is possible while retaining the unit's capability to meet peak electrical load at normal efficiency when there is no heating load. A study was performed to compare the retrofit scheme (e.g. having two backpressure turbines) with an alternate scheme having no backpressure turbine. It is concluded that the proposed concept for retrofitting large steam electric units does not require major turbine modifications, it minimizes electrical capacity losses during district heating operation, and allows the generating unit to operate at its peak capacity when there is no heating load.

• Research Organization: Stone and Webster Engineering Corp., New York, NY
• OSTI ID: 6650512
• Report Number(s): CONF-830446-
• Conference Information: Journal Name: Proc. Am. Power Conf.; (United States) Journal Volume: 45
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
200105* -- Fossil-Fueled Power Plants-- Heat Utilization
CAPACITY
COGENERATION
DEUS
DISTRICT HEATING
EFFICIENCY
ELECTRIC GENERATORS
ENERGY SYSTEMS
FEEDWATER
FOSSIL-FUEL POWER PLANTS
HEATING
HYDROGEN COMPOUNDS
MACHINERY
OXYGEN COMPOUNDS
PEAK LOAD
POWER GENERATION
POWER PLANTS
RETROFITTING
SEASONAL VARIATIONS
STEAM GENERATION
STEAM TURBINES
THERMAL POWER PLANTS
TURBINES
TURBOGENERATORS
TURBOMACHINERY
VARIATIONS
WATER
WATER HEATING