Cogeneration-wave of the future
Cogeneration is a method for producing process steam or heat, together with electric power, which optimizes the use of the fuel input to obtain maximum energy output. Two classes of cogeneration, topping cycles, and bottoming cycles, are studied in this paper. When heat is a byproduct of an electrical generating system, it is called a topping cycle; when the electricity is a byproduct of a system's excess heat, it is a bottoming cycle. Three cogeneration plant types--reciprocating engine, gas turbine, and steam turbine--are compared. Gas turbines have a wide fuel flexibility, produce high heat output, and have low atmospheric pollution. Steam turbines have the greatest flexibility, are efficient at partial load, and have the highest heat output per unit of electricity. Rankine and Brayton steam cycles are the two most common bottoming cycles.
- OSTI ID:
- 6866202
- Journal Information:
- Spec. Eng.; (United States), Journal Name: Spec. Eng.; (United States) Vol. 49:3; ISSN SPEND
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
200102* -- Fossil-Fueled Power Plants-- Power Cycles
42 ENGINEERING
425000 -- Engineering-- Power Cycles-- (1980-)
AIR POLLUTION
BOTTOMING CYCLES
BRAYTON CYCLE
COGENERATION
COMPARATIVE EVALUATIONS
DEUS
DUAL-PURPOSE POWER PLANTS
EFFICIENCY
ELECTRIC POWER
ENERGY
ENERGY EFFICIENCY
ENERGY SYSTEMS
ENGINES
FLEXIBILITY
FUELS
GAS TURBINES
HEAT
MACHINERY
MECHANICAL PROPERTIES
OPTIMIZATION
POLLUTION
POWER
POWER GENERATION
POWER PLANTS
PROCESS HEAT
RANKINE CYCLE
STEAM GENERATION
STEAM TURBINES
TENSILE PROPERTIES
THERMODYNAMIC CYCLES
TOPPING CYCLES
TURBINES
TURBOMACHINERY