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Mathematical modelling and experimental investigation of solar air collectors with corrugated absorbers

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  • Lin, Wenye
  • Ren, Haoshan
  • Ma, Zhenjun

Abstract

This paper presents mathematical modelling and performance evaluation of solar air collectors (SACs) with corrugated absorbers for indoor space heating. Experimental tests were first conducted based on a SAC system to understand its real-time performance. A mathematical model was then developed and validated against the experimental data. A sensitivity study was further implemented to identify the key design factors and investigate their influence on the performance of the SAC. The results showed that the modelling results agreed with the experimental data. The surface absorptance and opening angle of the corrugated absorber were the most significant design variables governing the thermal efficiency of SACs. The other significant variables included the temperature setting for the outlet air from the SAC, the depth ratio of the upper air channel to the overall size of the air space, the slope and length of the SAC, the air flow rate, and the unit area mass of the absorber. Using the opening angle of 60° and surface absorptance of 0.8 can result in an average effective thermal efficiency of 27.14%, which was comparable to that using the opening angle of 120° and the surface absorptance of 0.96. The results obtained can be used to facilitate optimal design of SACs.

Suggested Citation

  • Lin, Wenye & Ren, Haoshan & Ma, Zhenjun, 2020. "Mathematical modelling and experimental investigation of solar air collectors with corrugated absorbers," Renewable Energy, Elsevier, vol. 145(C), pages 164-179.
    • Handle: RePEc:eee:renene:v:145:y:2020:i:c:p:164-179
    DOI: 10.1016/j.renene.2019.05.129
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    Cited by:

    1. Tuncer, Azim Doğuş & Khanlari, Ataollah & Sözen, Adnan & Gürbüz, Emine Yağız & Şirin, Ceylin & Gungor, Afsin, 2020. "Energy-exergy and enviro-economic survey of solar air heaters with various air channel modifications," Renewable Energy, Elsevier, vol. 160(C), pages 67-85.
    2. Arias-Rosales, Andrés & LeDuc, Philip R., 2020. "Modeling the transmittance of anisotropic diffuse radiation towards estimating energy losses in solar panel coverings," Applied Energy, Elsevier, vol. 268(C).
    3. Vengadesan, Elumalai & Senthil, Ramalingam, 2020. "A review on recent developments in thermal performance enhancement methods of flat plate solar air collector," Renewable and Sustainable Energy Reviews, Elsevier, vol. 134(C).
    4. Bezbaruah, Parag Jyoti & Das, Rajat Subhra & Sarkar, Bikash Kumar, 2021. "Experimental and numerical analysis of solar air heater accoutered with modified conical vortex generators in a staggered fashion," Renewable Energy, Elsevier, vol. 180(C), pages 109-131.

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