Preliminary study of large cogeneration/district heating power plants
The concept of cogeneration is receiving national attention as a measure of energy conservation, for cogeneration increases the ratio of useful energy output to the energy input of a steam-electric power plant. The heat energy supplied by way of steam can be used for both industrial processing and district heating. In the latter case, the steam is used either directly as a heat carrier or indirectly for heating the water recirculated in hot-water district-heating systems. This study is centered on a condensing cogeneration turbine with four controllable steam extractions at two different pressure levels 6 to 13 psia and 10 to 29 psia) so that the water used for district heating is heated in two stages in series. When the heat load demand is small, steam can be further expanded in the condensing tails downstream from the controllable extractions, thereby enabling a certain degree of independence between the production of heat and electric power. This cycle is especially suitable when the heat load varies considerably during the year, as is the case for district-heating requirement. Currently, there are no large cogeneration facilities and the intent of this study is to prepare a preliminary technical and economic assessment of an 800-MWe condensing cogeneration turbine for hot-water district heating. The study includes: (1) a review of the basic principles of cogeneration; (2) the conceptual design of an 800-MWe cogeneration plant cycle; and (3) the comparison of cogeneration and conventional electric power plants of equal rated capacity in terms of heat rate, fuel savings, and cooling-water consumption. Technical and economic areas that need extensive and detailed evaluation are identified. The ultimate goal is to establish the utility criteria for a prototype large district heating/electricity system in the USA. (MCW)
- Research Organization:
- United Engineers and Constructors, Inc., Philadelphia, PA (USA)
- DOE Contract Number:
- EY-76-C-02-2477
- OSTI ID:
- 6870136
- Report Number(s):
- COO-2477-015
- Country of Publication:
- United States
- Language:
- English
Similar Records
District heating/cogeneration application studies for the Minneapolis-St. Paul area: allocation methods for the separation of electrical and thermal cogeneration costs
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Related Subjects
POLICY AND ECONOMY
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
CO-GENERATION
TECHNOLOGY ASSESSMENT
DISTRICT HEATING
ENERGY CONSERVATION
ECONOMICS
ELECTRIC POWER
ELECTRIC UTILITIES
ENVIRONMENTAL EFFECTS
PROCESS HEAT
SITE SELECTION
STEAM GENERATION
TURBINES
DEUS
ENERGY
HEAT
HEATING
POWER
POWER GENERATION
PUBLIC UTILITIES
TURBOMACHINERY
290800* - Energy Planning & Policy- Heat Utilization- (1980-)
291000 - Energy Planning & Policy- Conservation
320603 - Energy Conservation
Consumption
& Utilization- Municipalities & Community Systems- Public Utilities- (1980-)
320304 - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Waste Heat Recovery & Utilization