TY - JOUR
T1 - Performance Assessment of Coal Fired Power Plant Integrated with Calcium Looping CO2 Capture Process
AU - Zhang, Xuelei
AU - Song, Piaopiao
PY - 2023
Y1 - 2023
N2 - CaL technology is a promising means for post-combustion CO2 capture in already existing power plants, and heat integration is an effective way to lower the efficiency penalty caused by CO2 capture. Three cases with different heat integration degree were investigated in the manuscript to predict the efficiency penalty and the specific energy consumption for CO2 capture, aiming to find the optimum scheme of integrating capture unit into coal-fired power plant. The sensitivity analysis was also conducted to compare the impacts of key parameters. The simulation results show that the Case 3, which employs a variety of measures to improve the internal heat integration within CaL and reclaims the surplus released heat via an additional steam cycle, has the lowest efficiency penalty, 5.75%. It also indicates that heat integration in Case 3 results in a 14.4% of decrease in coal consumption, a 5.8% of reduction in power consumed by CO2 compression process, a 13.6% of drop in power consumption in ASU, and a 31.5% of decrease in specific energy consumption for CO2 capture. The sensitivity analysis shows that the efficiency penalty may be reduced by 0.011 percentage points for each degree decrease in temperature difference of MH-1. As the compression efficiency increases from 70% to 85%, the efficiency penalty decreases from 6.51% to 5.47%, and the specific energy consumption reduces from 2.21 MJ/kg CO2 to 1.80 MJ/kg CO2. Abbreviations: APH: Air Preheater; ASUL: Air Separation Unit; BFPT: Boiler Feedwater Pump Turbine; CaL: Calcium Looping; CCS: Carbon Capture and Sequestration; CFPP: Coal-Fired Power Plant; GSS: Gas-Solid Separator; HPC: High Pressure Column; HPEC: High Pressure Economizer; HPSH: High Pressure Super-Heater; HPST: High Pressure Steam Turbine; HRSG: Heat Recovery Steam Generator; IPEC: Intermediate Pressure Economizer; IPEV: Intermediate Pressure Evaporator; IPSH: Intermediate Pressure Super-Heater; LPST: Low Pressure Steam Turbine; LHV: Low Heat Value; LPC: Low Pressure Column; LPEC: Low Pressure Economizer; LPEV: Low Pressure Evaporator; ORC: Organic Rankine Cycle; RH: Reheater.
AB - CaL technology is a promising means for post-combustion CO2 capture in already existing power plants, and heat integration is an effective way to lower the efficiency penalty caused by CO2 capture. Three cases with different heat integration degree were investigated in the manuscript to predict the efficiency penalty and the specific energy consumption for CO2 capture, aiming to find the optimum scheme of integrating capture unit into coal-fired power plant. The sensitivity analysis was also conducted to compare the impacts of key parameters. The simulation results show that the Case 3, which employs a variety of measures to improve the internal heat integration within CaL and reclaims the surplus released heat via an additional steam cycle, has the lowest efficiency penalty, 5.75%. It also indicates that heat integration in Case 3 results in a 14.4% of decrease in coal consumption, a 5.8% of reduction in power consumed by CO2 compression process, a 13.6% of drop in power consumption in ASU, and a 31.5% of decrease in specific energy consumption for CO2 capture. The sensitivity analysis shows that the efficiency penalty may be reduced by 0.011 percentage points for each degree decrease in temperature difference of MH-1. As the compression efficiency increases from 70% to 85%, the efficiency penalty decreases from 6.51% to 5.47%, and the specific energy consumption reduces from 2.21 MJ/kg CO2 to 1.80 MJ/kg CO2. Abbreviations: APH: Air Preheater; ASUL: Air Separation Unit; BFPT: Boiler Feedwater Pump Turbine; CaL: Calcium Looping; CCS: Carbon Capture and Sequestration; CFPP: Coal-Fired Power Plant; GSS: Gas-Solid Separator; HPC: High Pressure Column; HPEC: High Pressure Economizer; HPSH: High Pressure Super-Heater; HPST: High Pressure Steam Turbine; HRSG: Heat Recovery Steam Generator; IPEC: Intermediate Pressure Economizer; IPEV: Intermediate Pressure Evaporator; IPSH: Intermediate Pressure Super-Heater; LPST: Low Pressure Steam Turbine; LHV: Low Heat Value; LPC: Low Pressure Column; LPEC: Low Pressure Economizer; LPEV: Low Pressure Evaporator; ORC: Organic Rankine Cycle; RH: Reheater.
KW - air separation
KW - Calcium looping
KW - CO capture
KW - efficiency penalty
KW - heat integration
UR - http://www.scopus.com/inward/record.url?scp=85074364721&partnerID=8YFLogxK
U2 - 10.1080/15567036.2019.1673510
DO - 10.1080/15567036.2019.1673510
M3 - Article
AN - SCOPUS:85074364721
SN - 1556-7036
VL - 45
SP - 6096
EP - 6117
JO - Energy Sources, Part A: Recovery, Utilization and Environmental Effects
JF - Energy Sources, Part A: Recovery, Utilization and Environmental Effects
IS - 2
ER -