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Analysis and optimization on a modified ammonia-water power cycle for more efficient power generation

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  • Chen, X.
  • Sun, L.N.
  • Du, S.

Abstract

This paper presented a modified ammonia-water power cycle that is operated at two pressure levels and equipped with two separators and one heater. The internal irreversibilities due to heat transfer can be greatly reduced by well-matched temperature during the heat addition process. In the feasibility study, the suitable selection range of design parameters is firstly decoupled to ensure reasonable results, guarantee convergent results, and consume less calculation time. In the optimization study, the optimization efforts are aimed at maximizing net power. Two reference Kalina cycles are then chosen for comparisons under two scenarios: medium (346 °C) and low (122 °C) heat source temperatures. The results show that the proposed cycle can produce 12% and 8% more power than the reference Kalina cycles due to more vapor flow and increased average temperature entering the turbine. The proposed cycle can be further simplified by eliminating certain internal heat exchangers, which eventually decreases the system complexity. The proposed cycle has a better capability of adaptation to a wider temperature range of heat source conditions while maintaining a better performance.

Suggested Citation

  • Chen, X. & Sun, L.N. & Du, S., 2022. "Analysis and optimization on a modified ammonia-water power cycle for more efficient power generation," Energy, Elsevier, vol. 241(C).
    • Handle: RePEc:eee:energy:v:241:y:2022:i:c:s0360544221031790
    DOI: 10.1016/j.energy.2021.122930
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    References listed on IDEAS

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    Cited by:

    1. Cheng, Ziyang & Wang, Jiangfeng & Hu, Bin & Chen, Liangqi & Lou, Juwei & Cheng, Shangfang & Wu, Weifeng, 2024. "Improved modelling for ammonia-water power cycle coupled with turbine optimization design: A comparison study," Energy, Elsevier, vol. 292(C).

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