Comprehensive analysis and optimization for a novel combined heating and power system based on self-condensing transcritical CO2 Rankine cycle driven by geothermal energy from thermodynamic, exergoeconomic and exergoenvironmental aspects

Guo, Yumin; Guo, Xinru; Wang, Jiangfeng; Li, Zhanying; Cheng, Shangfang; Wang, Shunsen

doi:10.1016/j.energy.2024.131581

Energy

2024

DOI: 10.1016/j.energy.2024.131581

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Comprehensive analysis and optimization for a novel combined heating and power system based on self-condensing transcritical CO2 Rankine cycle driven by geothermal energy from thermodynamic, exergoeconomic and exergoenvironmental aspects

Yumin Guo,

Xinru Guo,

Jiangfeng Wang

et al.

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2024

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Cited by 3 publications

References 55 publications

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Heat Recovery Integration in a Hybrid Geothermal-based System Producing Power and Heating Using Machine Learning Approach to Maximize Outputs

Gasmi,

Abed,

Dutta

et al. 2024

Case Studies in Thermal Engineering

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Heat Recovery Integration in a Hybrid Geothermal-based System Producing Power and Heating Using Machine Learning Approach to Maximize Outputs

Gasmi,

Abed,

Dutta

et al. 2024

Case Studies in Thermal Engineering

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Multi-objective optimization and life cycle assessment of mass-integrated combined heat and power system

Yang,

Li,

Teng

et al. 2024

Science of The Total Environment

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A Novel Fuel-Based CO2 Transcritical Cycle for Combined Cooling and Power Generation on Hypersonic Aircrafts

He,

Wang,

Dong

et al. 2024

Energies

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This study focuses on the great challenges for combined cooling and power supply on hypersonic aircrafts. To address the issues of low thermal efficiency and high fuel consumption of heat sink by the existing CO2 supercritical Brayton cycle, a novel fuel-based CO2 transcritical cooling and power (FCTCP) system is constructed. A steady-state simulation model is built to investigate the impacts of combustion chamber wall temperatures and fuel mass flow rates on the FCTCP system. Thermal efficiency of the CO2 transcritical cycle reaches 25.2~32.8% under various combustion chamber wall outlet temperatures and endothermic pressures. Compared with the supercritical Brayton cycle, the thermal efficiency of novel system increases by 54.5~80.9%. It is found from deep insights into the thermodynamic results that the average heat transfer temperature difference between CO2 and fuel is effectively reduced from 153.4 K to 16 K by split cooling of the fuel in the FCTCP system, which greatly enhances the matching of CO2–fuel heat exchange temperatures and reduces the heat exchange loss of the system. Thermodynamic results also show that, in comparison to the supercritical Brayton cycle, the cooling capacity and power generation per unit mass flow rate of working fluid in the FCTCP system increased by 75.4~80.8% and 12.9~51.6%, respectively. The FCTCP system exhibits a substantial performance improvement, significantly enhancing the key characteristic index of the combined cooling and power supply system. This study presents a novel approach to solving the challenges of cooling and power supply in hypersonic aircrafts under limited fuel heat sink conditions, laying the groundwork for further exploration of thermal management technologies of hypersonic aircrafts.

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Comprehensive analysis and optimization for a novel combined heating and power system based on self-condensing transcritical CO2 Rankine cycle driven by geothermal energy from thermodynamic, exergoeconomic and exergoenvironmental aspects

Cited by 3 publications

References 55 publications

Heat Recovery Integration in a Hybrid Geothermal-based System Producing Power and Heating Using Machine Learning Approach to Maximize Outputs

Heat Recovery Integration in a Hybrid Geothermal-based System Producing Power and Heating Using Machine Learning Approach to Maximize Outputs

Multi-objective optimization and life cycle assessment of mass-integrated combined heat and power system

A Novel Fuel-Based CO2 Transcritical Cycle for Combined Cooling and Power Generation on Hypersonic Aircrafts

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