Thermoeconomic analysis of a CO2 compression system using waste heat into the regenerative organic Rankine cycle

Kurtuluş, Karani; Coskun, Ahmet U.; Ameen, Shadan; Yılmaz, Ceyhun; Bolattürk, Ali

doi:10.1016/j.enconman.2018.05.037

Cited by 32 publications

(11 citation statements)

References 27 publications

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“…Meanwhile, Kurtulus et al [24] integrated an Organic Rankine Cycle (ORC) with CO2 compressors and conducted a thermodynamic analysis of their system. Pei et al [25] conducted a similar analysis and concluded that the coupling of an ORC to shockwave-based CO2 compression is more promising than simple intercooling compression.…”

Section: Nomenclature Aimentioning

confidence: 99%

Energy minimization of carbon capture and storage by means of a novel process configuration

Ali

Sultan

Lee

et al. 2020

Energy Conversion and Management

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Carbon capture and storage is considered a key technology for decarbonizing the heat and power industries and achieving net zero emission targets. However, the significant energy requirements of the process as currently utilized hinders its widespread implementation. This work presents a novel process configuration by which the energy expenditures of carbon capture and storage can be minimized. This configuration is intended to enhance heat integration during the capture process through an innovative combination of three stripper modifications, namely lean vapor compression, a rich solvent split with vapor heat recovery and reboiler condensate heat recovery using a stripper inter-heater in a single flow-sheet. For carbon dioxide compression, a novel pressurization strategy involving carbon dioxide multi-stage compressors, a heat pump system and a supercritical carbon dioxide power cycle was designed and evaluated. The heat pump was used for carbon dioxide liquefaction while the supercritical carbon dioxide power cycle was employed to recover the intercooling heat. Through a comprehensive parametric investigation of the proposed configuration, the optimum value of the key operating parameters i.e., the split fraction, flash pressure, stripper inter-heater location, stripper inter-heater solvent flowrate, carbon dioxide liquefaction pressure and supercritical carbon dioxide cycle turbine pressure ratio were estimated.The performance of the proposed design at the optimized condition was quantified in terms of the reboiler heat duty, the carbon dioxide pressurization power and the equivalent work and compared to a baseline case post-combustion carbon capture and storage process. The proposed case reduced the reboiler heat duty from 3.36 GJ/TonneCO2 to 2.65 GJ/TonneCO2 and the electric power required for carbon dioxide compression from 16,691 kW to 14,708 kW. The results demonstrate that the new design can significantly

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Section: Nomenclature Aimentioning

confidence: 99%

Energy minimization of carbon capture and storage by means of a novel process configuration

Ali

Sultan

Lee

et al. 2020

Energy Conversion and Management

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“…Carbon capture and sequestration (CCS) is an emerging technology with extensive research and development efforts globally . Recently, CO 2 has received increasing attention as a potential working fluid in power generation cycles due to its superior heat transfer and thermodynamic characteristics . For power‐generation systems, compared with other types of thermal cycle fluids, sCO 2 has a lower critical temperature and pressure and a lower gas viscosity.…”

Section: Introductionmentioning

confidence: 99%

“…An existing issue for the direct use of sCO 2 produced from geothermal reservoirs is how to obtain high purity sCO 2 for the gas turbine expansion process . In the sCO 2 turbine expansion process, even a small quality of water can damage the turbine blades and reduce the power conversion efficiency. Although a geothermal reservoir will be drying out and the water content will be decreased with the injection time, it is impossible to avoid entraining some brine in the CO 2 phase .…”

Section: Introductionmentioning

confidence: 99%

“…8,9 Recently, CO 2 has received increasing attention as a potential working fluid in power generation cycles due to its superior heat transfer and thermodynamic characteristics. [10][11][12] For power-generation systems, compared with other types of thermal cycle fluids, sCO 2 has a lower critical temperature and pressure and a lower gas viscosity. Supercritical CO 2 is a more suitable working fluid for advanced thermodynamic cycles, such as Brayton and organic Rankine cycles.…”

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confidence: 99%

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Performance analysis and optimization design of an axial-flow vane separator for supercritical CO₂ (sCO₂ )-water mixtures from geothermal reservoirs

et al. 2019

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Summary Supercritical CO2 (sCO2) has been proven to be a promising working fluid for geothermal heat mining, and the produced hot sCO2 can be directly used for power generation. However, the sCO2 produced from a brine‐based reservoir may contain a certain amount of water, preventing direct power‐cycle utilization. In this paper, an axial vane separator was designed to address the separation problem of sCO2 and water produced from geothermal reservoirs. First, the influences of operational and structural parameters on the separation performance were analyzed through numerical simulations. Five factors were selected to develop separation performance regression models by the response‐surface method (RSM). Finally, geometrical parameter optimization was applied to these RSM models. The results show that the guide vane area and the exhaust inlet are the main locations impacting the system pressure drop. The separation performance can be affected by many factors, including the guide blade outlet angle, number of vanes, hub diameter, length of the vortex tube, droplet size, and inlet velocity. The water‐droplet size and the number of vanes are the most critical factors affecting the separation efficiency. The inlet velocity, the number of vanes, and the hub diameter have a larger influence on the pressure drop of the separator. The optimization results indicate that the separation efficiency can reach 100% under certain operating conditions with a pressure drop no greater than 100 kPa.

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“…Some researchers have focused on the system integration between the power plant and CO 2 capture process and considered it as an efficient strategy to improve the net efficiency [13][14][15][16][17][18][19][20][21][22][23]. For example, the temperature of the heat from multi-stages compression intercoolers is relatively high, which makes it feasible to recover and reuse this heat to heat up the water after the turbine condenser [13,14] or the rich amine solution [15], or even generate electricity through a supercritical CO 2 Rankine cycle [16,17]. The energy penalty of carbon capture is not only effected by the energy recovery from the CO 2 capture subsystem, but also the optimization of the steam extraction location [18].…”

Section: Introductionmentioning

confidence: 99%

A New Integration System for Natural Gas Combined Cycle Power Plants with CO2 Capture and Heat Supply

Gao

et al. 2018

Energies

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Although carbon mitigation in power industry is attracting more and more attention around the world, the large scale application of carbon capture technology is obstructed because of the enormous energy consumption and huge capital investment required. In this study, an integrated system with power generation, CO2 capture and heat supply are proposed, which adopts three measures to reutilize the waste heat released from the CO2 capture process, including extracted steam recirculation, a CO2 Rankine cycle and a radiant floor heat subsystem. Amongst these measures, the radiant floor heat subsystem can efficiently reuse the relatively low temperature waste energy in the absorbent cooler. Through thermodynamic analysis, it is determined that the power output of the new integrated system is 19.48 MW higher compared with the decarbonization Natural Gas Combined Cycle (NGCC) power plant without system integration. On the other hand, 247.59 MW of heat can be recovered through the radiant floor heat subsystem, leading to an improved overall energy efficiency of 73.6%. In terms of the economic performance, the integration requires only 2.6% more capital investment than a decarbonization NGCC power plant without system integration and obtains extra revenue of 3.40 $/MWh from the simultaneous heat supply, which reduces the cost of CO2 avoided by 22.3%. The results prove the economic and efficiency potential of a NGCC power plant integrated with carbon capture, which may promote the industrial demonstration of carbon capture theology.

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Thermoeconomic analysis of a CO2 compression system using waste heat into the regenerative organic Rankine cycle

Cited by 32 publications

References 27 publications

Energy minimization of carbon capture and storage by means of a novel process configuration

Energy minimization of carbon capture and storage by means of a novel process configuration

Performance analysis and optimization design of an axial-flow vane separator for supercritical CO₂ (sCO₂ )-water mixtures from geothermal reservoirs

A New Integration System for Natural Gas Combined Cycle Power Plants with CO2 Capture and Heat Supply

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Thermoeconomic analysis of a CO2 compression system using waste heat into the regenerative organic Rankine cycle

Cited by 32 publications

References 27 publications

Energy minimization of carbon capture and storage by means of a novel process configuration

Energy minimization of carbon capture and storage by means of a novel process configuration

Performance analysis and optimization design of an axial-flow vane separator for supercritical CO2 (sCO2 )-water mixtures from geothermal reservoirs

A New Integration System for Natural Gas Combined Cycle Power Plants with CO2 Capture and Heat Supply

Contact Info

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Performance analysis and optimization design of an axial-flow vane separator for supercritical CO₂ (sCO₂ )-water mixtures from geothermal reservoirs