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Numerical study on soundproof photovoltaic–thermal air path design based on ISO 9806 experimental validation

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Abstract

Dissemination of PVT technology in urban areas is challenging due to limited space caused by high population concentration. To address this issue, new technological advancements are needed to create more space for PVT technology deployment. Previous numerical studies on PVT have focused on validation tests to ensure reliable results. However, these tests have not met international criteria, such as ISO 9806, which is essential for validating thermal performance. Therefore, it is necessary to conduct validation tests for numerical studies that align with international thermal performance test methods and criteria. This presents study the development of a soundproof PVT module that can replace conventional soundproof walls. These modules can be easily installed along roads and railroads to mitigate noise pollution and promote the adoption of PVT facilities in urban areas. Additionally, thermal performance tests of the PVT module were conducted according to ISO 9806 criteria. A numerical performance simulation model was designed based on the test data, and a sensitivity study was performed on five different air path baffle designs to enhance thermal performance while considering inlet–outlet pressure drop. The soundproof PVT module demonstrated a sound insulation performance of 32.3 dB and an average coefficient of sound absorption of 0.93, and it also indicated inlet–outlet temperature rise values of 16.4 K and 13.2 K under low and high flow rate conditions, respectively. A comparison between practical thermal performance tests and numerical thermal performance simulation data revealed relative errors of 3.2% and 1.7% under low and high flow rate conditions, respectively. The ratios of inlet–outlet temperature rise to pressure drop for Cases A, B, C, and D were 0.11 K Pa−1, 0.08 K Pa−1, 0.17 K Pa−1, and 0.41 K Pa−1, respectively, while the Case R model demonstrates a ratio of 0.29 K Pa−1 under high flow rate conditions. Among the five air path designs, Case D demonstrated the best performance in terms of thermal efficiency, surpassing even the Case R design.

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Abbreviations

A :

Absorber area

C P :

Specific heat

G :

Total irradiance

PVT:

PVT loss coefficient

k :

Thermal conductivity

∆ P :

Inlet–outlet pressure drop

PowerPVT :

PVT electricity generation

α :

: Solar absorptivity

Q flow :

Flow rate

T :

Temperature

T s :

Surface temperature

T a :

Ambient temperature

T in :

Inlet temperature

T out :

Outlet temperature

∆ T :

Temperature difference

V wind :

Wind velocity

V duct :

Duct flow velocity

W consumption :

Power consumption

W pumping :

Pumping power

ε :

Long wave emissivity

η :

Thermal efficiency

μ :

Working fluid velocity

ρ :

Density

σ :

Stefan Boltzmann coefficient

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Acknowledgements

This study was supported by the Ministry of Land, Infrastructure, and Transport (MOLIT) of the Republic of Korea (No. 21CTAP-C152061-03).

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Authors and Affiliations

  1. Renewable Energy Engineering Department, University of Science and Technology, Daejeon, 34113, Korea

    Yu Jin Kim

  2. Energy Efficiency Research Division, Korea Institute of Energy Research, Daejeon, 34129, Korea

    Kibong Kim, Euy Joon lee & Eun Chul Kang

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  1. Yu Jin Kim
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Contributions

YJK and ECK conceptualized the study; YJK and Kang E.C. helped in methodology; YJK and OSH validated the study; KBK and OSH were involved in formal analysis; YJK, KBK, and ECK investigated the study; YJK curated the data and wrote the original draft; ECK helped in writing—review and editing. All the authors have read and agreed to the published version of the manuscript.

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Correspondence to Eun Chul Kang.

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Kim, Y.J., Kim, K., lee, E.J. et al. Numerical study on soundproof photovoltaic–thermal air path design based on ISO 9806 experimental validation. J Therm Anal Calorim 148, 10269–10283 (2023). https://doi.org/10.1007/s10973-023-12410-y

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