Second analysis of a cogeneration cycle
Decentralized design methods will always greatly facilitate the optimum design of large engineering systems whenever a high degree of decentralization (H.D.D.) is achieved. H.D.D. allows optimization of each component by itself without significantly sacrificing the overall system optimum. In this thesis, primary engineering component costing expressions are introduced, resulting in a significant H.D.D.-called primary decentralization--for the design of gas turbines with or without co-generation by a steam power bottoming cycle. These cost expressions are a compromise between simplicity and a representative model for engineering component costing. A requirement for such expressions is that they provide a balance not only between the capital cost expenditures and the dissipation of exergy, but also between the capital cost and the dissipation of heat removal capacity. In fact, additional exergy dissipation always results in the dissipation of more heat, which in turn must be removed from the overall power generation cycle. Applied to a gas turbine cogeneration cycle, such decentralization serves to show how the steam power bottoming cycle assists the gas turbine cycle. The results are compared to the decentralization of the system with the gas turbine acting as a topping cycle which assists the steam power cycle. The compromise between these two approaches produces a significant H.D.D. which allows engineers to study many more possible improvements in co-generation than could otherwise be considered.
- Research Organization:
- Georgia Inst. of Tech., Atlanta, GA (USA)
- OSTI ID:
- 6158571
- Resource Relation:
- Other Information: Thesis (Ph. D.)
- Country of Publication:
- United States
- Language:
- English
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DUAL-PURPOSE POWER PLANTS
GAS TURBINES
COST ESTIMATION
DESIGN
BOTTOMING CYCLES
CAPACITY
CAPITALIZED COST
COGENERATION
COMPARATIVE EVALUATIONS
ENGINEERING
EXERGY
HEAT LOSSES
MATHEMATICAL MODELS
OPTIMIZATION
PLANNING
STEAM
THERMAL EFFICIENCY
COST
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ENERGY
ENERGY LOSSES
ENERGY SYSTEMS
LOSSES
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STEAM GENERATION
THERMODYNAMIC CYCLES
TURBINES
TURBOMACHINERY
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