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A Novel Modeling of Molten-Salt Heat Storage Systems in Thermal Solar Power Plants

Author

Listed:
  • Rogelio Peón Menéndez

    (Group TSK, 33203 Gijón, Asturias, Spain)

  • Juan Á. Martínez

    (Department of Electrical Engineering, Universidad de Oviedo, 33203 Gijón, Asturias, Spain)

  • Miguel J. Prieto

    (Department of Electrical Engineering, Universidad de Oviedo, 33203 Gijón, Asturias, Spain)

  • Lourdes Á. Barcia

    (González Soriano S.A., 33420 Llanera, Asturias, Spain)

  • Juan M. Martín Sánchez

    (ADEX, S.L., 28031 Madrid, Spain)

Abstract

Many thermal solar power plants use thermal oil as heat transfer fluid, and molten salts as thermal energy storage. Oil absorbs energy from sun light, and transfers it to a water-steam cycle across heat exchangers, to be converted into electric energy by means of a turbogenerator, or to be stored in a thermal energy storage system so that it can be later transferred to the water-steam cycle. The complexity of these thermal solar plants is rather high, as they combine traditional engineering used in power stations (water-steam cycle) or petrochemical (oil piping), with the new solar (parabolic trough collector) and heat storage (molten salts) technologies. With the engineering of these plants being relatively new, regulation of the thermal energy storage system is currently achieved in manual or semiautomatic ways, controlling its variables with proportional-integral-derivative (PID) regulators. This makes the overall performance of these plants non optimal. This work focuses on energy storage systems based on molten salt, and defines a complete model of the process. By defining such a model, the ground for future research into optimal control methods will be established. The accuracy of the model will be determined by comparing the results it provides and those measured in the molten-salt heat storage system of an actual power plant.

Suggested Citation

  • Rogelio Peón Menéndez & Juan Á. Martínez & Miguel J. Prieto & Lourdes Á. Barcia & Juan M. Martín Sánchez, 2014. "A Novel Modeling of Molten-Salt Heat Storage Systems in Thermal Solar Power Plants," Energies, MDPI, vol. 7(10), pages 1-20, October.
    • Handle: RePEc:gam:jeners:v:7:y:2014:i:10:p:6721-6740:d:41289
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    References listed on IDEAS

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    1. Wu, Shuang-Ying & Xiao, Lan & Cao, Yiding & Li, You-Rong, 2010. "A parabolic dish/AMTEC solar thermal power system and its performance evaluation," Applied Energy, Elsevier, vol. 87(2), pages 452-462, February.
    2. Yang, Zhen & Garimella, Suresh V., 2013. "Cyclic operation of molten-salt thermal energy storage in thermoclines for solar power plants," Applied Energy, Elsevier, vol. 103(C), pages 256-265.
    3. Peng, Qiang & Yang, Xiaoxi & Ding, Jing & Wei, Xiaolan & Yang, Jianping, 2013. "Design of new molten salt thermal energy storage material for solar thermal power plant," Applied Energy, Elsevier, vol. 112(C), pages 682-689.
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    Cited by:

    1. Miguel J. Prieto & Juan Á. Martínez & Rogelio Peón & Lourdes Á. Barcia & Fernando Nuño, 2017. "On the Convenience of Using Simulation Models to Optimize the Control Strategy of Molten-Salt Heat Storage Systems in Solar Thermal Power Plants," Energies, MDPI, vol. 10(7), pages 1-17, July.
    2. Jesse G. Wales & Alexander J. Zolan & William T. Hamilton & Alexandra M. Newman & Michael J. Wagner, 2023. "Combining simulation and optimization to derive operating policies for a concentrating solar power plant," OR Spectrum: Quantitative Approaches in Management, Springer;Gesellschaft für Operations Research e.V., vol. 45(1), pages 119-150, March.
    3. Lourdes A. Barcia & Rogelio Peón Menéndez & Juan Á. Martínez Esteban & Miguel A. José Prieto & Juan A. Martín Ramos & F. Javier De Cos Juez & Antonio Nevado Reviriego, 2015. "Dynamic Modeling of the Solar Field in Parabolic Trough Solar Power Plants," Energies, MDPI, vol. 8(12), pages 1-17, November.
    4. Bonilla, Javier & Rodríguez-García, Margarita M. & Roca, Lidia & de la Calle, Alberto & Valenzuela, Loreto, 2018. "Design and experimental validation of a computational effective dynamic thermal energy storage tank model," Energy, Elsevier, vol. 152(C), pages 840-857.
    5. Salazar, Germán A. & Fraidenraich, Naum & de Oliveira, Carlos Antonio Alves & de Castro Vilela, Olga & Hongn, Marcos & Gordon, Jeffrey M., 2017. "Analytic modeling of parabolic trough solar thermal power plants," Energy, Elsevier, vol. 138(C), pages 1148-1156.

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