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Xu Feng

Tsinghua University

Beijing, 100084

China

  • Tsinghua University

SCHOLARLY PAPERS

7

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201

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0

Scholarly Papers (7)

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1.

Thermodynamic and techno-economic evaluation of working-fluid suitability for Brayton-cycle pumped thermal electricity storage under engineering constraints

Downloads 39 (1,332,057)

Thermodynamic and techno-economic evaluation of working-fluid suitability for Brayton-cycle pumped thermal electricity storage under engineering constraints

Number of pages: 39 Posted: 28 Apr 2026
Di Qi, Xu Feng, Yanjun Du, Cancan Zhang and Yuting Wu
Beijing University of Technology, Tsinghua University, Beijing University of Technology, Beijing University of Technology and Beijing University of Technology
Downloads 17 (1,548,841)

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Pumped thermal electricity storage, Working-fluid selection, Engineering constraints, LCOS sensitivity, Comprehensive suitability evaluation

Thermodynamic and techno-economic evaluation of working-fluid suitability for Brayton-cycle pumped thermal electricity storage under engineering constraints

Number of pages: 39 Posted: 18 May 2026
Di Qi, Xu Feng, Yanjun Du, Cancan Zhang and Yuting Wu
Beijing University of Technology, Tsinghua University, Beijing University of Technology, Beijing University of Technology and Beijing University of Technology
Downloads 17 (1,579,999)

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Pumped thermal electricity storage, Working-fluid selection, Engineering constraints, LCOS sensitivity, Comprehensive suitability evaluation

Thermodynamic and techno-economic evaluation of working-fluid suitability for Brayton-cycle pumped thermal electricity storage under engineering constraints

Number of pages: 39 Posted: 17 Jun 2026
Di Qi, Xu Feng, Yanjun Du, Cancan Zhang and Yuting Wu
Beijing University of Technology, Tsinghua University, Beijing University of Technology, Beijing University of Technology and Beijing University of Technology
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Pumped thermal electricity storage, Working-fluid selection, Engineering constraints, LCOS sensitivity, Comprehensive suitability evaluation

2.

Thermodynamic Analysis and Optimization of Pumped Thermal Electricity Storage System of Molten Salt Based on Carbon Dioxide Brayton Cycle

Downloads 39 (1,196,171)

Thermodynamic Analysis and Optimization of Pumped Thermal Electricity Storage System of Molten Salt Based on Carbon Dioxide Brayton Cycle

Number of pages: 29 Posted: 06 Feb 2025
Di Qi, Xu Feng, Yanjun Du, Yuting Wu and Bingqi Li
Beijing University of Technology, Tsinghua University, Beijing University of Technology, Beijing University of Technology and Beijing University of Technology
Downloads 20 (1,500,232)

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PTES, CO2 Brayton cycle, Molten salt thermal storage, Exergy analysis

Thermodynamic Analysis and Optimization of Pumped Thermal Electricity Storage System of Molten Salt Based on Carbon Dioxide Brayton Cycle

Number of pages: 32 Posted: 16 Jun 2025
Di Qi, Xu Feng, Yanjun Du, Yuting Wu and Bingqi Li
Beijing University of Technology, Tsinghua University, Beijing University of Technology, Beijing University of Technology and Beijing University of Technology
Downloads 19 (1,513,226)

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PTES, Feasible operating conditions, CO2 Brayton cycle, Thermodynamic

3.

Advanced exergy analysis of a carbon dioxide Brayton cycle pumped thermal electricity storage system with wide liquid temperature range molten salt

Number of pages: 39 Posted: 27 Oct 2025
Di Qi, Xu Feng, Yuting Wu and Yanjun Du
Beijing University of Technology, Tsinghua University, Beijing University of Technology and Beijing University of Technology
Downloads 37 (1,222,651)

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PTES, Carbon dioxide Brayton cycle, Molten salt thermal energy storage, Advanced exergy analysis, System optimization

4.

Comparative thermodynamic and economic analysis of working fluids for a Brayton cycle pumped thermal electricity storage systems

Downloads 29 (1,359,097)

Comparative thermodynamic and economic analysis of working fluids for a Brayton cycle pumped thermal electricity storage systems

Number of pages: 36 Posted: 19 Mar 2026
Di Qi, Xu Feng, Yanjun Du, Cancan Zhang and Yuting Wu
Beijing University of Technology, Tsinghua University, Beijing University of Technology, Beijing University of Technology and Beijing University of Technology
Downloads 15 (1,570,077)

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Pumped thermal electricity storage, Working fluids, thermal energy storage, Thermodynamic optimization, Economic analysis

Comparative thermodynamic and economic analysis of working fluids for a Brayton cycle pumped thermal electricity storage systems

Number of pages: 36 Posted: 14 Mar 2026
Di Qi, Xu Feng, Yanjun Du, Cancan Zhang and Yuting Wu
Beijing University of Technology, Tsinghua University, Beijing University of Technology, Beijing University of Technology and Beijing University of Technology
Downloads 14 (1,579,999)

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Pumped thermal electricity storage, Working fluids, Thermal energy storage, Thermodynamic optimization, Economic analysis

5.

Performance analysis and multi-objective optimization of PV/T coupled transcritical CO2 heat pump under wide ambient temperature range

Number of pages: 30 Posted: 27 Sep 2025
Ruotong Wang, Xu Feng and Yinhai Zhu
Xinjiang University, Tsinghua University and Tsinghua University
Downloads 26 (1,385,945)

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Transcritical CO2 heat pump, PV/T, Multi-objective optimization, solar energy

6.

Experimental Characterization and Surrogate Modeling of a Variable-Speed Single-Screw Compressor under Low-Temperature and High-Pressure-Ratio Conditions

Downloads 17 (1,500,778)

Experimental Characterization and Surrogate Modeling of a Variable-Speed Single-Screw Compressor under Low-Temperature and High-Pressure-Ratio Conditions

Number of pages: 27 Posted: 20 May 2026
Di Qi, Wenqing Li, Yuting Wu, Yanjun Du, Xu Feng and Guangyu Zhao
Beijing University of Technology, Tsinghua University, Beijing University of Technology, Beijing University of Technology, Tsinghua University and affiliation not provided to SSRN
Downloads 10 (1,621,812)

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single-screw compressor, low-temperature and high-pressure-ratio conditions, experimental characteristics, adiabatic efficiency, Surrogate model

Experimental Characterization and Surrogate Modeling of a Variable-Speed Single-Screw Compressor under Low-Temperature and High-Pressure-Ratio Conditions

Number of pages: 27 Posted: 01 May 2026
Di Qi, Wenqing Li, Yuting Wu, Yanjun Du, Xu Feng and Guangyu Zhao
Beijing University of Technology, Tsinghua University, Beijing University of Technology, Beijing University of Technology, Tsinghua University and affiliation not provided to SSRN
Downloads 7 (1,628,763)

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single-screw compressor, low-temperature and high-pressure-ratio conditions, experimental characteristics, adiabatic efficiency, surrogate model

7.

Study on Control Strategy Optimization and Performance Analysis of a PV/T-Coupled Transcritical CO2 Heat Pump System with Ejector and Vapor Injection Based on Environmental Mode Switching

Number of pages: 29 Posted: 17 Feb 2026
Yinhai Zhu, Ruotong Wang and Xu Feng
Tsinghua University, Xinjiang University and Tsinghua University
Downloads 14 (1,518,554)

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PV/T dual-source transcritical CO2 heat pump, Ejector, Vapor injection, Control strategy