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Performance enhancement of PV/T systems through geometric modification of spiral–tube absorbers: a 3D CFD analysis
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DOI：10.1016/j.ecmx.2026.102052.png)
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Abstract
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• A novel double‑path PV/T module with spiral cooling tubes is proposed for enhanced thermal management. • 3D CFD modeling and parametric optimization are employed, coupling geometry, flow conditions, and operating parameters. • Increasing S from 3 m to 6 m reduces surface temperature and enhances thermal efficiency up to 55.8%. • The double‑path configuration improves thermal efficiency from 6.62% to 9.14%, a 38% relative increase. • Thermal efficiency rises from 5.5% to 10.64% with Reynolds number, while electrical efficiency increases marginally (10%–10.26%).
Keywords:
PV/T module thermal management
CFD
Performance enhancement
Ternary nanofluid optimization
Spiral tube
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