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Journal of Thermal Science

热科学学报

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2024 , Vol. 33 >Issue 5: 1657 - 1671

DOI: https://doi.org/10.1007/s11630-024-1973-5

Power Generation Enhancement in a Solar Energy and Biomass-Based Distributed Energy System using H2O/CO2 Hybrid Gasification

  • WU Haifeng ,
  • LYU Yan ,
  • WANG Ruixiang ,
  • XU Rongji ,
  • QU Wanjun ,
  • LIU Qibin
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  • 1. Beijing Engineering Research Center of Sustainable Energy and Buildings, Beijing University of Civil Engineering and Architecture, Beijing 100044, China
    2. Guangdong Provincial Key Laboratory of Distributed Energy Systems, School of Chemical Engineering and Energy Technology, Dongguan University of Technology, Dongguan 523808, China
    3. Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China

Online published: 2024-09-08

Supported by

This work is supported by the National Natural Science Foundation of China (No. 52306220) and Major Program of the National Natural Science Foundation of China (No. 52090061).

Copyright

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2024
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Abstract

A new solar energy and biomass-based distributed energy system using H2O/CO2 hybrid gasification is proposed, and their complementarity to enhance the system’s energy efficiency is investigated and shown. In the system, concentrated solar energy is used to provide heat for biomass gasification; two gasifying agents (H2O and CO2) are adopted to enhance syngas yields, and the produced solar fuel is further burned for power production in a combined cycle plant. Results show that CO share in gasification products is remarkably increased with the increment of CO2/H2O mole ratio caused by the boudouard reaction with the consumption of fixed carbon, while the H2 share is decreased; the optimal solar-to-fuel efficiency, 27.88%, is achieved when the temperature and CO2/H2O mole ratio are 1050°C and 0.45, respectively. The emission reduction rate of CO2 in the system under design conditions is reduced by 2.31% compared with that using only H2O agent. The annual power production of the system is increased by 1.39%, and the thermodynamic and environmental performances are significantly improved. Moreover, an economic assessment is conducted to forecast the technical feasibility of the hybrid gasification technology. This work provides a promising route to improving the thermochemical utilization efficiency of solar energy and solid fuel.

Key words： solar energy; biomass hybrid gasification; distributed energy system; thermodynamics performance

Cite this article

WU Haifeng , LYU Yan , WANG Ruixiang , XU Rongji , QU Wanjun , LIU Qibin . Power Generation Enhancement in a Solar Energy and Biomass-Based Distributed Energy System using H2O/CO2 Hybrid Gasification[J]. Journal of Thermal Science, 2024 , 33(5) : 1657 -1671 . DOI: 10.1007/s11630-024-1973-5

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