Performance Analysis of Cold Energy Recovery from CO2 Injection in Ship-Based Carbon Capture and Storage (CCS)
Abstract
:1. Introduction
2. Description of Injection System
2.1. System 1: Conventional Injection System
2.2. System 2: New Injection System with a Rankine Cycle
Working fluid | Boiling point (°C) | Produced work per mass (kJ/kg) |
---|---|---|
C3H8 (Propane) | −42 | 65.4 |
C4H10 (i-Butane) | −13 | 23.9 |
NH3 (Ammonia) | −33 | 121.9 |
3. Comparison Approaches
3.1. Basis of Simulation
Item | Note |
---|---|
Location | Ulleung Basin in the East Sea of Korea |
Composition of CO2 | Pure CO2 |
Inlet conditions | 8 bar, −53 °C |
Outlet conditions | 100 bar, 5 °C |
Flow rate | 580 ton/h |
Seawater temperature | 16.6 °C |
Discharge pressure of seawater pump | 3 bar |
Discharge seawater temperature | ±3 °C |
Equation of state | Peng-Robinson |
Turbine efficiency | 80% |
Pump efficiency | 75% |
Working fluid | NH3 |
3.2. Specific Net Power Consumption and Thermal Efficiency
3.3. Exergy Efficiency
3.4. Life-Cycle Cost
Item | Value |
---|---|
Injection time | 24 h/ship |
The number of voyages | 72/year |
MDO consumption rate | 180 g/kWh |
MDO price | 1,000 $/ton |
Life time | 20 years |
4. Results and Discussion
4.1. Specific Net Power Consumption
4.2. Exergy Efficiency
4.3. Life-Cycle Cost
4.4. Sensitivity Analysis
4.4.1. Discharge Pressure
4.4.2. Seawater Temperature
4.5. Discussion
5. Conclusions
Acknowledgments
Nomenclature
CCS | Carbon capture and storage | LCC | Life cycle cost |
LNG | Liquefied natural gas | CAPEX | Capital expenditures |
OPEX | Operational expenditures | MDO | Marine diesel oil |
Ẇ | Power [kW] | m | Mass [ton] |
ẇ | Specific power [kW/ton] | ṅ | Mole flow rate [kgmol/hr] |
Η | Efficiency | Heat transfer rate [kW] | |
Ėx | Exergy [kJ/hr] | ex | Specific exergy [kJ/kgmol] |
h | Specific enthalpy [kJ/kgmol] | s | Specific entropy [kJ/kgmol∙K] |
T | Temperature [K] |
Subscripts
loss | Loss | net | Net power consumption |
input | Input into a system | output | Output from a system |
in | Inlet | out | Outlet |
turbine, i | i-th turbine | pump_CO2, i | i-th pump of CO2 |
pump_WF, i | i-th pump of working fluid | pump_SW, i | i-th pump of sea water |
p | Pump | t | Turbine |
th | Thermal | ex | Exergy |
i | Integer number (1, 2, 3, ∙∙∙) | j | Integer number (1, 2, 3, ∙∙∙) |
CO2 | Carbon dioxide | 0 | Ambient condition (1 atm, 298 K) |
SW | Sea water |
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You, H.; Seo, Y.; Huh, C.; Chang, D. Performance Analysis of Cold Energy Recovery from CO2 Injection in Ship-Based Carbon Capture and Storage (CCS). Energies 2014, 7, 7266-7281. https://doi.org/10.3390/en7117266
You H, Seo Y, Huh C, Chang D. Performance Analysis of Cold Energy Recovery from CO2 Injection in Ship-Based Carbon Capture and Storage (CCS). Energies. 2014; 7(11):7266-7281. https://doi.org/10.3390/en7117266
Chicago/Turabian StyleYou, Hwalong, Youngkyun Seo, Cheol Huh, and Daejun Chang. 2014. "Performance Analysis of Cold Energy Recovery from CO2 Injection in Ship-Based Carbon Capture and Storage (CCS)" Energies 7, no. 11: 7266-7281. https://doi.org/10.3390/en7117266