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Design and modeling of low temperature solar thermal power station

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  • Shankar Ganesh, N.
  • Srinivas, T.

Abstract

During the heat recovery in a Kalina cycle, a binary aqua–ammonia mixture changes its state from liquid to vapor, the more volatile ammonia vaporizes first and then the water starts vaporization to match temperature profile of the hot fluid. In the present work, a low temperature Kalina cycle has been investigated to optimize the heat recovery from solar thermal collectors. Hot fluid coming from solar parabolic trough collector with vacuum tubes is used to generate ammonia rich vapor in a boiler for power generation. The turbine inlet conditions are optimized to match the variable hot fluid temperature with the intermittent nature of the solar radiation. The key parameters discussed in this study are strong solution concentration, separator temperature which affects the hot fluid inlet temperature and turbine ammonia concentration. Solar parabolic collector system with vacuum tubes has been designed at the optimized power plant conditions. This work can be used in the selection of boiler, separator and turbine conditions to maximize the power output as well as efficiency of power generation system. The current model results a maximum limit temperature for separator as 150°C at the Indian climatic conditions. A maximum specific power of 105kW per kg/s of working fluid can be obtained at 80% of strong solution concentration with 140°C separator temperature. The corresponding plant and cycle efficiencies are 5.25% and 13% respectively. But the maximum efficiencies of 6% and 15% can be obtained respectively for plant and Kalina cycle at 150°C of separator temperature.

Suggested Citation

  • Shankar Ganesh, N. & Srinivas, T., 2012. "Design and modeling of low temperature solar thermal power station," Applied Energy, Elsevier, vol. 91(1), pages 180-186.
    • Handle: RePEc:eee:appene:v:91:y:2012:i:1:p:180-186
    DOI: 10.1016/j.apenergy.2011.09.021
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    Cited by:

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    2. Liu, Bohan & Lu, Mingjian & Shui, Bo & Sun, Yuwei & Wei, Wei, 2022. "Thermal-hydraulic performance analysis of printed circuit heat exchanger precooler in the Brayton cycle for supercritical CO2 waste heat recovery," Applied Energy, Elsevier, vol. 305(C).
    3. Varma, G.V. Pradeep & Srinivas, T., 2017. "Power generation from low temperature heat recovery," Renewable and Sustainable Energy Reviews, Elsevier, vol. 75(C), pages 402-414.
    4. Bao, Junjiang & Zhao, Li, 2012. "Exergy analysis and parameter study on a novel auto-cascade Rankine cycle," Energy, Elsevier, vol. 48(1), pages 539-547.
    5. Babaelahi, Mojtaba & Mofidipour, Ehsan & Rafat, Ehsan, 2019. "Design, dynamic analysis and control-based exergetic optimization for solar-driven Kalina power plant," Energy, Elsevier, vol. 187(C).
    6. Li, Xinguo & Zhang, Qilin & Li, Xiajie, 2013. "A Kalina cycle with ejector," Energy, Elsevier, vol. 54(C), pages 212-219.
    7. Feng, Yongqiang & Zhang, Yaning & Li, Bingxi & Yang, Jinfu & Shi, Yang, 2015. "Sensitivity analysis and thermoeconomic comparison of ORCs (organic Rankine cycles) for low temperature waste heat recovery," Energy, Elsevier, vol. 82(C), pages 664-677.
    8. N Shankar Ganesh & T Srinivas & G Uma Maheswari & S Mahendiran & D Manivannan, 2019. "Development of optimized energy system," Energy & Environment, , vol. 30(7), pages 1190-1205, November.
    9. Kim, Kyoung Hoon & Ko, Hyung Jong & Kim, Kyoungjin, 2014. "Assessment of pinch point characteristics in heat exchangers and condensers of ammonia–water based power cycles," Applied Energy, Elsevier, vol. 113(C), pages 970-981.
    10. 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).
    11. Sait, Hani H. & Martinez-Val, Jose M. & Abbas, Ruben & Munoz-Anton, Javier, 2015. "Fresnel-based modular solar fields for performance/cost optimization in solar thermal power plants: A comparison with parabolic trough collectors," Applied Energy, Elsevier, vol. 141(C), pages 175-189.

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