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Effects of utilizing nanofluid as working fluid in a lab-scale designed FPSC to improve thermal absorption and efficiency

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  • Ahmadlouydarab, Majid
  • Ebadolahzadeh, Mohammad
  • Muhammad Ali, Hafiz

Abstract

The significance of using renewable energy has led to huge amount of studies on increasing the efficiency of the systems using these energies. The flat plate solar collector (FPSC) is one of the most common types of these systems. In this experimental study, we have made a change within the structure of a lab-scale flat-plate solar collector, and have increased its efficiency for public use. To this aim, a nanofluid containing TiO2 particles was used as working fluid which does not circulate inside the FPSC. Purified water as the agent fluid was circulating inside the piping system and water storage tank As a direct result, this mechanism increases the FPSC lifetime and reduces the costs compared to that of old versions. Moreover, a layer of N-TiO2 particles was applied on the outer side of the FPSC collector glass surface. This technique improves the self-cleaning properties of the surface, and also enhances the collector thermal efficiency. Studied range for volume fraction of TiO2 particles was from 0.1 % to 5%. The optimum volume fractions of TiO2 particles were utilized to study the collector performance. The measured average diameter of the TiO2 particles was about 20 nm. The nanofluid was prepared using a two-step method and by adding a sodium dodecyl sulfate (SDS) as surfactant. Results indicated that, using the nanofluid as working fluid, the collector efficiency was increased by about 45% and 17% for the volume fractions of 5% and 2.5% of TiO2 nanoparticles, respectively. Besides, an increase in the TiO2 particles volume fraction led to increment in absorbed heat by FPSC. Additionally, effects of initial temperature of tank water i.e. 0 °C, 10 °C, 20 °C, and 30 °C on the thermal efficiency was studied. Increasing the initial temperature showed positive influence on the efficiency. Moreover, regardless of whether the thermal connection is disconnected or connected, the collector does not lose its efficiency.

Suggested Citation

  • Ahmadlouydarab, Majid & Ebadolahzadeh, Mohammad & Muhammad Ali, Hafiz, 2020. "Effects of utilizing nanofluid as working fluid in a lab-scale designed FPSC to improve thermal absorption and efficiency," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 540(C).
    • Handle: RePEc:eee:phsmap:v:540:y:2020:i:c:s0378437119317534
    DOI: 10.1016/j.physa.2019.123109
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    References listed on IDEAS

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    1. Woobin Kang & Yunchan Shin & Honghyun Cho, 2017. "Economic Analysis of Flat-Plate and U-Tube Solar Collectors Using an Al 2 O 3 Nanofluid," Energies, MDPI, vol. 10(11), pages 1-15, November.
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    Cited by:

    1. Ahmadlouydarab, Majid & Anari, Tahereh Dana & Akbarzadeh, Alireza, 2022. "Experimental study on cylindrical and flat plate solar collectors’ thermal efficiency comparison," Renewable Energy, Elsevier, vol. 190(C), pages 848-864.
    2. Tembhare, Saurabh P. & Barai, Divya P. & Bhanvase, Bharat A., 2022. "Performance evaluation of nanofluids in solar thermal and solar photovoltaic systems: A comprehensive review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 153(C).
    3. Akbarzadeh, Alireza & Ahmadlouydarab, Majid & Niaei, Aligholi, 2021. "Capabilities of α-Al2O3, γ-Al2O3, and bentonite dry powders used in flat plate solar collector for thermal energy storage," Renewable Energy, Elsevier, vol. 173(C), pages 704-720.
    4. Muzamil Hussain & Syed Khawar Hussain Shah & Uzair Sajjad & Naseem Abbas & Ahsan Ali, 2022. "Recent Developments in Optical and Thermal Performance of Direct Absorption Solar Collectors," Energies, MDPI, vol. 15(19), pages 1-23, September.

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