Thermodynamic analysis on the combination of supercritical carbon dioxide power cycle and transcritical carbon dioxide refrigeration cycle for the waste heat recovery of shipboard

Yu, Aofang; Su, Wen; Lin, Xinxing; Zhou, Nana; Zhao, Li

doi:10.1016/j.enconman.2020.113214

Cited by 64 publications

(14 citation statements)

References 51 publications

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“…Recently Yu et al (2020) simulated the operation of a CO 2 based combined power refrigeration cycle recovering the diesel engine waste heat. The layout of a similar cycle is presented in Fig.…”

Section: Diesel Engine Waste Heat Utilization Through Combined Cyclesmentioning

confidence: 99%

“…In the EGHRU, the CO 2 mass was heated to the turbine inlet state by the exhaust gas of the diesel Fig. 13.9 Layout of the CO 2 based combined power refrigeration cycle for diesel engine waste heat recovery simulated by Yu et al (2020) engine. The exiting CO 2 stream from the turbine was cooled to some extent in the high temperature regenerator (HTR).…”

Section: Diesel Engine Waste Heat Utilization Through Combined Cyclesmentioning

confidence: 99%

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Diesel Engine Waste Heat Recovery Schemes for Improved Fuel Economy and Reduced Emissions: Simulation Results

Mondal

2021

Energy, Environment, and Sustainability

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Diesel engines are widely used for road and marine transports. Stationary diesel engines are also used for off-grid supply of electricity for households or to run the auxiliary equipment such as pump, compressor, etc. A significant portion of the thermal energy input to diesel engines is ultimately rejected as waste heat. Exhaust flue gas from marine diesel engines are at about 300 °C. On the other hand, jacket cooling water and scavenging air cooling water are available at below 100 °C. Available waste heat from road transport system may be utilized to produce cooling/heating effect for conditioning of the cabin environment. The waste heat may also be used in turbo chargers for a higher power density. In marine applications, the waste heat may drive a bottoming power cycle to supply the auxiliary power. Waste heat available form a stationary diesel power plant can even be used to run a cogeneration/polygeneration unit satisfying some of the localized energy needs. In the present chapter, simulation results of possible schemes and effects of waste heat recovery from diesel engines have been explored. Finally, generalized principles for the simulation of diesel engine waste heat recovery have been discussed.

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Section: Diesel Engine Waste Heat Utilization Through Combined Cyclesmentioning

confidence: 99%

Section: Diesel Engine Waste Heat Utilization Through Combined Cyclesmentioning

confidence: 99%

Diesel Engine Waste Heat Recovery Schemes for Improved Fuel Economy and Reduced Emissions: Simulation Results

Mondal

2021

Energy, Environment, and Sustainability

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“…This implies that cycles with moderate energy source temperatures (550–750°C) have higher exergy efficiencies than Allam‐based cycles. Further, 4E analyses were conducted on integrated cooling‐heating‐power (CHP) systems where the sCO 2 power block is integrated as a top 38 or bottoming cycle 39 with a focus on freshwater production, 40 hydrogen generation, 41 refrigeration cycle, 42 and waste heat recovery 43 . However, compared to the benefits of these systems, their complexity makes them less attractive for practical applications as their economic feasibility was not confirmed in most of these studies.…”

Section: Introductionmentioning

confidence: 99%

Comprehensive thermoeconomic, exergoeconomic, and optimization analyses of direct oxy‐combustion supercritical CO₂ intercooled and reheated cycles under design and off‐design conditions

Al‐Ammari

Sleiti

2022

Energy Science & Engineering

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This study presents comprehensive energetic, exergetic, exergoeconomic, and economic (4E) performance analyses for four direct oxy-combustion (DOC) supercritical carbon dioxide (sCO 2 ) power cycles at design, off-design, and part-load conditions. These cycles include the dual recuperator cycle (DRC), intercooling cycle (ICC), partial intercooling cycle (PIC), and reheating cycle (RHC). The analyses were conducted at relatively low turbine inlet temperatures (TIT: 550-750°C) with compressor inlet temperature (CIT) varied from 33°C (wet-cooling) to 50°C (dry-cooling). Furthermore, single-and multiobjective optimization analyses were conducted for each cycle. At design conditions (high-pressure of P c,o = 20 MPa, lowpressure of P c,o = 5.4 MPa, TIT = 750°C, CIT = 50°C [dry-cooling]), the PIC has the highest thermal efficiency (47.78%) compared to 38.36% for DRC, 45.71% for ICC, and 44.39% for RHC. At optimized conditions (P c,o = 30 MPa, P c,o = 8 MPa, TIT = 744°C, CIT = 30°C [wet-cooling]), the ICC shows superior energetic performance (52.08%) compared to 47.97% for DRC, 49.20% for PIC, and 48.62% for RHC. At offdesign conditions with a power demand (PD) of 40% of the design load (50 MW), the thermal efficiency is decreased by 21.82% in DRC, 17.71% in ICC, 22.46% in PIC, and 13.60% in RHC. The ICC has the minimum levelized cost of electricity compared to the other cycles with 5.93 ¢/kWh at design conditions (dry-cooling), 5.65 ¢/kWh at optimized conditions (wet-cooling), and 7.2 ¢/kWh at minimum PD (21 MW). Therefore, from an economic point of view, the ICC is recommended as the best power block for a sCO 2 power cycle driven by oxy-combustor at moderate TITs. The study also provides constructive comparisons between the DOC-sCO 2 and indirect (nuclear, solar, and waste heat) sCO 2 power cycle systems and the future research directions.

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“…Natural gas CO2 has been discovered as a refrigerant in the refrigeration industry. Ozone depletion potential (ODP) is 0 and global warming potential (GWP) is 1, which are ideal refrigerants for sustainable development and have attracted more and more attention and research interest from all countries in the world [3] . The lower critical temperature of CO2 is 31.1℃ and the critical pressure is up to 7.38MPa.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the ejector two-stage compression refrigeration cycle with work performance from energy, conventional exergy and advanced exergy perspectives

Xie

Yang

Zhu

et al. 2022

Preprint

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Low temperature cold chain is the top priority of logistics development at this stage. CO2 (carbon dioxide) refrigeration system is widely used. However, the low efficiency of CO2 refrigeration system is the biggest obstacle to its development. In this research work, a novel trans-critical CO2 refrigeration cycle with ejector for cryogenic storage is proposed. The energy and traditional exergy model of the system are established, and the advanced exergy model is established based on the traditional exergy model, and the actual performance of the system is analyzed. The results show that the exergy destruction of each component of the ejector is the largest in the system, and the optimization potential is the highest in both traditional and advanced exergy models. After studying the influence of main parameters in the system cycle on the system performance and performance, it is found that there is an optimum intermediate pressure and gas cooler pressure in the system to maximize the system performance and efficiency. According to the influence of the change of system parameters on the system, it is found that the outlet temperature of gas cooler has the greatest influence on the optimization of ejector.

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Thermodynamic analysis on the combination of supercritical carbon dioxide power cycle and transcritical carbon dioxide refrigeration cycle for the waste heat recovery of shipboard

Cited by 64 publications

References 51 publications

Diesel Engine Waste Heat Recovery Schemes for Improved Fuel Economy and Reduced Emissions: Simulation Results

Diesel Engine Waste Heat Recovery Schemes for Improved Fuel Economy and Reduced Emissions: Simulation Results

Comprehensive thermoeconomic, exergoeconomic, and optimization analyses of direct oxy‐combustion supercritical CO₂ intercooled and reheated cycles under design and off‐design conditions

Evaluation of the ejector two-stage compression refrigeration cycle with work performance from energy, conventional exergy and advanced exergy perspectives

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Thermodynamic analysis on the combination of supercritical carbon dioxide power cycle and transcritical carbon dioxide refrigeration cycle for the waste heat recovery of shipboard

Cited by 64 publications

References 51 publications

Diesel Engine Waste Heat Recovery Schemes for Improved Fuel Economy and Reduced Emissions: Simulation Results

Diesel Engine Waste Heat Recovery Schemes for Improved Fuel Economy and Reduced Emissions: Simulation Results

Comprehensive thermoeconomic, exergoeconomic, and optimization analyses of direct oxy‐combustion supercritical CO2 intercooled and reheated cycles under design and off‐design conditions

Evaluation of the ejector two-stage compression refrigeration cycle with work performance from energy, conventional exergy and advanced exergy perspectives

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Comprehensive thermoeconomic, exergoeconomic, and optimization analyses of direct oxy‐combustion supercritical CO₂ intercooled and reheated cycles under design and off‐design conditions