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Optimization design research of combined cooling, heating, and power system based on novel redundancy strategies

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  • Han, Zhonghe
  • Zhang, Jiahui
  • Zhang, Han

Abstract

The combined cooling, heating, and power system is widely used as an efficient and flexible energy supply solution. However, current research rarely considers the potential equipment failure risk, while redundant design is an effective means to ensure the reliable operation of system. To achieve a better balance between system reliability and integrated performance (IP), this paper proposes two redundancy strategies based on the conventional full redundancy strategy: partial redundancy and hot standby redundancy. Additionally, a flexible operation mode is designed for system under hot standby redundancy strategy, with the number of operation and standby equipment optimized to improve system performance. Optimization results indicate that the system availability under full redundancy strategy reaches 99.61 %, but the IP is significantly low at −22.82 %, so it is only suitable for scenarios with high reliability requirements. In contrast, although the availability decreases by 3.58 % under partial redundancy strategy, the IP increases by 18.36 %, suggesting that it can significantly enhance IP while maintaining high reliability. Under hot standby redundancy strategy, the system achieves optimal IP and availability at 7.62 % and 99.63 %, respectively. Finally, the sensitivity analysis is carried out by changing energy price.

Suggested Citation

  • Han, Zhonghe & Zhang, Jiahui & Zhang, Han, 2025. "Optimization design research of combined cooling, heating, and power system based on novel redundancy strategies," Energy, Elsevier, vol. 316(C).
    • Handle: RePEc:eee:energy:v:316:y:2025:i:c:s0360544225001318
    DOI: 10.1016/j.energy.2025.134489
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