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Thermal hydraulic simulation of absorber tubes in linear Fresnel reflector solar thermal system using RELAP

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  • Sahoo, Sudhansu S.
  • Singh, Suneet
  • Banerjee, Rangan

Abstract

This paper presents thermal hydraulic modelling and simulation in the absorber tube of a Linear Fresnel Reflector (LFR) solar thermal system is carried out. The system is modelled using two-phase flow simulation software, RELAP5/MOD3.4. Although, RELAP5 is very commonly used in nuclear engineering design and simulation, it can be used for the simulation of solar thermal systems. Unlike other thermal systems like refrigerators and nuclear industries, there is significant heat loss from the surface of the absorber tube in a solar thermal system, which varies significantly with the temperature of the absorber tube wall. The recently developed temperature dependent heat loss has been incorporated in RELAP5 for variable net heat flux studies. The implementation of the temperature dependent heat losses has been verified by comparing the results obtained from RELAP with those obtained by Homogeneous Equilibrium Model. Parametric studies are carried out using verified RELAP model for different values of heat flux, mass flux, inlet subcooling and inlet pressure. The developed model can be considered as an effective tool for better and effective absorber LFR tube design under designed conditions.

Suggested Citation

  • Sahoo, Sudhansu S. & Singh, Suneet & Banerjee, Rangan, 2016. "Thermal hydraulic simulation of absorber tubes in linear Fresnel reflector solar thermal system using RELAP," Renewable Energy, Elsevier, vol. 86(C), pages 507-516.
    • Handle: RePEc:eee:renene:v:86:y:2016:i:c:p:507-516
    DOI: 10.1016/j.renene.2015.08.050
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    References listed on IDEAS

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    1. Sahoo, Sudhansu S. & Varghese, Shinu M. & Suresh Kumar, C. & Viswanathan, S.P. & Singh, Suneet & Banerjee, Rangan, 2013. "Experimental investigation and computational validation of heat losses from the cavity receiver used in linear Fresnel reflector solar thermal system," Renewable Energy, Elsevier, vol. 55(C), pages 18-23.
    2. Singh, Panna Lal & Sarviya, R.M. & Bhagoria, J.L., 2010. "Thermal performance of linear Fresnel reflecting solar concentrator with trapezoidal cavity absorbers," Applied Energy, Elsevier, vol. 87(2), pages 541-550, February.
    3. Facão, Jorge & Oliveira, Armando C., 2011. "Numerical simulation of a trapezoidal cavity receiver for a linear Fresnel solar collector concentrator," Renewable Energy, Elsevier, vol. 36(1), pages 90-96.
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    Cited by:

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    2. Hongn, Marcos & Flores Larsen, Silvana, 2018. "Hydrothermal model for small-scale linear Fresnel absorbers with non-uniform stepwise solar distribution," Applied Energy, Elsevier, vol. 223(C), pages 329-346.
    3. Cheng, Ze-Dong & Zhao, Xue-Ru & He, Ya-Ling & Qiu, Yu, 2018. "A novel optical optimization model for linear Fresnel reflector concentrators," Renewable Energy, Elsevier, vol. 129(PA), pages 486-499.

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