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Parametric sensitivity analysis of a SOLRGT system with the indirect upgrading of low/mid-temperature solar heat

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  • Li, Yuan Yuan
  • Zhang, Na
  • Cai, Rui Xian

Abstract

Development of novel solar–fossil fuel hybrid system is important for the efficient utilization of low temperature solar heat. A solar-assisted methane chemically recuperated gas turbine (SOLRGT) system was proposed by Zhang and co-worker, which integrated solar heat into a high efficiency power system. The low temperature solar heat is first converted into vapor latent heat provided for a reformer, and then indirectly upgraded to high-grade generated syngas chemical energy by the reformation reaction. In this paper, based on the above mentioned cycle, a parametric analysis is performed using ASPEN PLUS code to further evaluate the effect of key thermodynamics parameters on the SOLRGT performance. It can be shown that solar collector temperature, steam/air mass ratio, turbine inlet pressure, and turbine inlet temperature have significant effects on system efficiency, solar-to-electricity efficiency, fossil fuel saving ratio, specific CO2 emission and so on. The solar collector temperature is varied between 140 and 240°C and the maximum net solar-to-electricity efficiency and system efficiency for a given turbine inlet condition (turbine inlet temperature of 1308°C and pressure ratio of 15) is 30.2% and 52.9%, respectively. The fossil fuel saving ratio can reach up to 21.8% and the reduction of specific CO2 emission is also 21.8% compared to the reference system. The system performance is promising for an optimum pressure ratio at a given turbine inlet temperature.

Suggested Citation

  • Li, Yuan Yuan & Zhang, Na & Cai, Rui Xian, 2012. "Parametric sensitivity analysis of a SOLRGT system with the indirect upgrading of low/mid-temperature solar heat," Applied Energy, Elsevier, vol. 97(C), pages 648-655.
    • Handle: RePEc:eee:appene:v:97:y:2012:i:c:p:648-655
    DOI: 10.1016/j.apenergy.2011.12.013
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    References listed on IDEAS

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    1. Dersch, Jürgen & Geyer, Michael & Herrmann, Ulf & Jones, Scott A. & Kelly, Bruce & Kistner, Rainer & Ortmanns, Winfried & Pitz-Paal, Robert & Price, Henry, 2004. "Trough integration into power plants—a study on the performance and economy of integrated solar combined cycle systems," Energy, Elsevier, vol. 29(5), pages 947-959.
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    Cited by:

    1. Li, Yuanyuan & Zhang, Na & Cai, Ruixian & Yang, Yongping, 2013. "Performance analysis of a near zero CO2 emission solar hybrid power generation system," Applied Energy, Elsevier, vol. 112(C), pages 727-736.
    2. Saxena, Abhishek & Varun, & El-Sebaii, A.A., 2015. "A thermodynamic review of solar air heaters," Renewable and Sustainable Energy Reviews, Elsevier, vol. 43(C), pages 863-890.
    3. Zhang, Guoqiang & Li, Yuanyuan & Zhang, Na, 2017. "Performance analysis of a novel low CO2-emission solar hybrid combined cycle power system," Energy, Elsevier, vol. 128(C), pages 152-162.

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