Abstract
The exergy and thermoeconomic analysis of components of power plants, refrigeration and polygeneration systems is presented and discussed to characterize the performance of such systems as well as to determine their products cost formation processes. Based on the general formulation of efficiency, presented in Chap. 2, the expressions of the exergy-based performance parameters of the components of these systems are derived. These concepts are applied to evaluate the electricity cost formation of a combined cycle power plant, and the comparative performance and production costs of steam and electricity of cogeneration plants configurations for chemical and dairy industries. Finally a comparative exergoeconomic study of trigeneration systems to produce electricity, steam, and chilled water is described and discussed.
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Abbreviations
- b :
-
Specific exergy (kJ/kg)
- B :
-
Exergy rate (kW)
- c :
-
Specific cost (US$/kWh, US$/kJ or US$/t)
- C :
-
Cost rate ($/s)
- C oi :
-
Cost of equipment i (US$)
- C equip,i :
-
Equipment i cost rate (US$/s)
- COP:
-
Coefficient of performance
- C turb :
-
Steam turbine cost rate (US$/s)
- E :
-
Energy rate (kW)
- f :
-
The fraction of the rejected heat of the heat engine that is sent to the refrigeration system
- f i :
-
Ratio of the exergy supplied to component i to the exergy consumed by the whole plant
- f l :
-
Load factor
- f om :
-
Annual operational and maintenance factor
- f t :
-
Time factor
- I :
-
Investment cost rate (US$/h)
- LHV:
-
Lower heating value (kJ/kg)
- m :
-
Mass flow rate (kg/s)
- n :
-
Annual interest rate
- N h :
-
8760 h/year
- P :
-
pressure (bar)
- P o :
-
Reference pressure (bar)
- Q :
-
Heat rate (kW)
- r :
-
Capital recovery period (year); parameter defined by Eq. 3.24
- T o :
-
Reference temperature (K)
- W :
-
Power (kW)
- α :
-
Relation between chemical exergy and lower heating value
- β :
-
Relation between heat rate and power
- Δ:
-
Variation
- η b :
-
Exergy efficiency
- η e :
-
Energy efficiency
- θ, \( \overline{{{\uptheta}}} \):
-
Carnot factor, average Carnot factor
- abs:
-
Absorption refrigerating system
- air:
-
Combustion air
- b:
-
Exergy
- c:
-
Compressor
- cc:
-
Combined cycle; combustion chamber
- cd:
-
Condenser
- chilled water:
-
Related to chilled water
- cp:
-
Compressor
- cpi:
-
Compressor inlet
- cpo:
-
Compressor outlet
- crs:
-
Compression refrigerating system
- e:
-
Electricity, Energy
- ev:
-
Evaporator
- excess:
-
Excess electricity
- eg:
-
Exhaust gas
- equip:
-
Equipment
- fuel:
-
Related to fuel
- fuelcc:
-
Fuel consumption in the gas turbine combustion chamber
- fuelhrsg:
-
Fuel consumption in the heat recovery steam generator
- G:
-
Related to the whole plant
- gas:
-
Natural gas
- gases:
-
Combustion gases
- ge:
-
Generator of the absorption chiller
- gt:
-
Gas turbine
- hrsg:
-
Heat recovery steam generator
- i :
-
Inlet, component i
- o:
-
Outlet
- overall:
-
Related to the whole plant
- proc:
-
Process
- p:
-
Pump; process
- pump:
-
Pump
- pump i:
-
Pump inlet
- pump o:
-
Pump outlet
- plant:
-
Related to plant
- process:
-
Related to process
- products:
-
Combustion products
- p1:
-
Steam demanded by process 1
- p2:
-
Steam demanded by process 2
- q, Q:
-
Heat/chilled water
- sb:
-
supplementary burning
- sc:
-
Steam cycle
- st:
-
Steam turbine
- steam:
-
Steam
- t :
-
Turbine
- ti:
-
Turbine inlet
- to:
-
Turbine outlet
- ABS:
-
Absorption chiller
- CC:
-
Combustion chamber
- CHP:
-
combined heat and power unit
- COND:
-
Condenser
- CONDP:
-
Condensate pump
- CIRCP:
-
Circulating pump
- CP:
-
Air compressor
- CT:
-
Combustion turbine
- CT:
-
Cooling tower
- D:
-
Duct, Dimension
- DB:
-
Supplementary firing module
- DEAR:
-
Deaerator
- ECON:
-
Economizer
- EVAP:
-
Evaporator
- FH:
-
Fuel heater
- GEEq :
-
Gas engine with equality method
- GT:
-
Gas turbine; turbine of the gas turbine
- GTEq :
-
Gas turbine with equality method
- GTEx :
-
Gas turbine with extraction method
- HP:
-
High pressure
- HPCON:
-
High pressure economizer
- HPECO2:
-
High pressure economizer 2
- HPEVAP:
-
High pressure evaporator
- HPPUMP:
-
High pressure feed pump
- HPSHR:
-
High pressure superheater
- HPSHT1:
-
High pressure superheater 1
- HPST:
-
High pressure section
- HRSG:
-
Heat recovery steam generator
- IP:
-
Intermediate pressure
- IPCON:
-
Intermediate pressure economizer
- IPPUMP:
-
Intermediate pressure feed pump
- IPST:
-
Intermediate pressure section
- IPSHT:
-
Intermediate pressure superheater
- IPSTH2:
-
Intermediate pressure superheater 2
- IPVAP:
-
Intermediate pressure evaporator
- LP:
-
Low pressure
- LPEVAP:
-
Low pressure evaporator
- LPSHT:
-
Low pressure superheater
- LPST:
-
Low pressure section
- MMBtu:
-
106 Btu
- OOC:
-
Original operating condition
- P:
-
Pump
- RH:
-
Reheater
- SHT:
-
Superheater
- ST:
-
Steam Turbine
- STEq :
-
Steam turbine with equality method
- STEx :
-
Steam turbine with extraction method
- TCR:
-
Total cost rate (US$/h)
- TR:
-
Ton of refrigeration (3.5 kW)
- WTHT:
-
Water heater
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de Oliveira, S. (2013). Exergy and Thermoeconomic Analysis of Power Plants, Refrigeration and Polygeneration Systems. In: Exergy. Green Energy and Technology. Springer, London. https://doi.org/10.1007/978-1-4471-4165-5_3
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