Evaluation of natural gas combined cycle power plant for post-combustion CO2 capture integration

Application of optimal design methodologies in retrofitting natural gas combined cycle power plants with CO2 capture

“…A 420 MW NGCC plant is modelled in GE's GateCycle™ software, which can be used for quick assessments, detailed engineering, design, retrofitting, repowering and acceptance testing for combined cycle plants, and has been widely reported in recent research [15]. For PCC plant, an equilibrium-stage model in Aspen Plus is utilized with MEA solution as solvent.…”

“…(10), (11), where HFCP ex and CFCP ex are heat-flow capacities (the multiplication between heat capacity and flow-rate) of hot stream and cold stream in exchanger ex, and variables of heat transfer differences (HBA ex and HBB ex ) should be small and the objective function will be formulated to minimize the sum of this infeasibility in energy balances HBA ex P HFCP ex  ðHTI ex À HTO ex Þ À EXA ex  U ex  LMTD 0 ex ; 8ex 2 EX ð10Þ HBB ex P EXA ex  U ex  LMTD 0 ex À HFCP ex  ðHTI ex À HTO ex Þ; 8ex 2 EX ð11Þ Eqs. (12)- (15) show the differences of energy balances in exchangers, where AEB ex and BEB ex are positive and should be small, EX ec&sh is the set of all economisers and superheaters, EX ev is the set of all evaporators, CF ex is flow rate of cold stream in an evaporator, and CHI ex and CHO ex are enthalpy of inlet and outlet cold streams in an evaporator. AEB ex P HFCP ex  ðHTI ex À HTO ex Þ À CFCP ex  ðCTO ex À CTI ex Þ; 8ex 2 EX ec&sh ð12Þ BEB ex P CFCP ex  ðCTO ex À CTI ex Þ À HFCP ex  ðHTI ex À HTO ex Þ; 8ex 2 EX ec&sh ð13Þ AEB ex P HFCP ex  ðHTI ex À HTO ex Þ À CF ex  ðCHO ex À CHI ex Þ; 8ex 2 EX ev ð14Þ BEB ex P CF ex  ðCHO ex À CHI ex Þ À HFCP ex  ðHTI ex À HTO ex Þ;…”

“…Joshagen et al [14] looked into how the turbomachinery reacts to EGR, and considered the potential of further improvements by utilizing pressurized water rather than extraction steam as the heat source for the CO 2 stripper. Biliyok and Yeung [15] built and validated the models for integrating a 440 MW NGCC power plant, a CO 2 capture plant and a CO 2 compression train, and found that in EGR scenario, higher exhaust gas CO 2 concentration enhanced mass transfer in the capture plant, which reduced its steam requirement. Peeters et al [16] predicted the potential performance of the PCC with CCGT, and considered the EGR as a significant method to improve the net efficiency and reduced the capital cost.…”

Probabilistic performance assessment of a coal-fired power plant

“…Hence, assessment of both coal and gas power plant performance under different loads [13,14], combined power and heat plants configurations [15,16] and CO 2 capture plant retrofits [17,18] is widely conducted using computational process http://dx.doi.org/10.1016/j.apenergy.2014. 10.079 0306-2619/Ó 2014 Elsevier Ltd. All rights reserved.…”

Carbon capture from pulverized coal power plant (PCPP): Solvent performance comparison at an industrial scale

“…4 | P a g e The heat integration schemes investigated in the literature include the method of steam extraction and 82 condensate recycling [15], integrating compressor inter-coolers to the low pressure section of the steam cycle 83 [16] or stripper reboiler [17], preheating combustion air using waste heat from the capture plant [18], and 84 application of pressurized hot water instead of steam for solvent regeneration [19,20]. Furthermore, the CO2 85 concentration of the flue gas can be increased by recirculation of the exhaust gases [19, 21,22] or using a 86 supplementary burner placed in the duct connecting the turbine exhaust and heat recovery steam generation 87 (HRSG) system [21][22][23]. Other researchers have explored the implications of the process configuration on the 88 capital investment and energy costs.…”