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Simulation study on a novel solar aided combined heat and power system for heat-power decoupling

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Listed:
  • Ding, Zeyu
  • Hou, Hongjuan
  • Duan, Liqiang
  • Huang, Chang
  • Hu, Eric
  • Yu, Gang
  • Zhang, Yumeng
  • Zhang, Nan

Abstract

To guarantee the space heating in the heating season, conventional combined heat and power (CHP) plants operate in a heat-controlled operation mode, resulting in restricted peak-shaving ability (PSA). To improve the CHP plant’s PSA, a novel solar aided CHP (SA-CHP) system is proposed and simulated in this paper. In the new system, solar heat could be flexibly used to generate power or to supply heat according to the heating and power demands, thereby realizing the heat-power decoupling. A set of models for the SA-CHP system is developed and validated. The PSA, the standard coal consumption (SCC) and the techno-economic performances of a 330 MWe SA-CHP system are comprehensively analyzed in this paper. The results show that the SA-CHP system can significantly improve (up to double) the PSA compared with the CHP plant under the same rated heating power. The feasible operation region area of the SA-CHP system is 74.7% larger than that of the CHP plant. The annual SCC of the SA-CHP system are 17378.23 t less than that of the CHP plant. The net annual revenue of the SA-CHP system is $2.24 M. Besides, techno-economic performances of SA-CHP systems with two different heat storage systems are compared.

Suggested Citation

  • Ding, Zeyu & Hou, Hongjuan & Duan, Liqiang & Huang, Chang & Hu, Eric & Yu, Gang & Zhang, Yumeng & Zhang, Nan, 2021. "Simulation study on a novel solar aided combined heat and power system for heat-power decoupling," Energy, Elsevier, vol. 220(C).
    • Handle: RePEc:eee:energy:v:220:y:2021:i:c:s0360544220327961
    DOI: 10.1016/j.energy.2020.119689
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    Cited by:

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    5. Yan, Rujing & Wang, Jiangjiang & Huo, Shuojie & Zhang, Jing & Tang, Saiqiu & Yang, Mei, 2023. "Comparative study for four technologies on flexibility improvement and renewable energy accommodation of combined heat and power system," Energy, Elsevier, vol. 263(PE).
    6. Wang, Haichao & Hua, Pengmin & Wu, Xiaozhou & Zhang, Ruoyu & Granlund, Katja & Li, Ji & Zhu, Yingjie & Lahdelma, Risto & Teppo, Esa & Yu, Li, 2022. "Heat-power decoupling and energy saving of the CHP unit with heat pump based waste heat recovery system," Energy, Elsevier, vol. 250(C).
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    8. Jin, Yuhui & Wu, Xiao & Shen, Jiong, 2022. "Power-heat coordinated control of multiple energy system for off-grid energy supply using multi-timescale distributed predictive control," Energy, Elsevier, vol. 254(PB).

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