Photovoltaic-Thermal System Combined with Wavy Tubes, Twisted Tape Inserts and a Novel Coolant Fluid: Energy and Exergy Analysis

Koorosh Khosravi, Amir Hossein Eisapour, Alireza Rahbari, Jasim M. Mahdi, Pouyan Talebizadehsardari, Amir Keshmiri

Research output: Contribution to journalArticlepeer-review

Abstract

To create a highly efficient photovoltaic-thermal (PV-T) system and maximize the energy and exergy efficiency, this study aims to propose an innovative configuration of a PV-T system comprising wavy tubes with twisted-tape inserts. Following the validation of a numerical model, a parametric study has been conducted to assess the geometrical effects of twisted tape and wavy tubes, as well as the coolant fluid type and velocity, on the overall performance of a PV-T system, located in Shiraz, Iran. It is found that employing twisted tape improves the energy and exergy efficiency by approx. 6.3%. The best configuration yields 12.4% and 16.8% increase in energy and exergy efficiency compared to conventional PV systems. This is achieved at 15% volumetric concentration of microencapsulated phase change material slurry. The monthly variation of global horizontal irradiance in Shiraz highly affected the energy and exergy efficiency of PV-T, with July and October exhibiting the most efficient months, corresponding to 90% and 11.3%, respectively.
Original languageEnglish
JournalEngineering Applications of Computational Fluid Mechanics
Publication statusAccepted/In press - 17 Apr 2023

Keywords

  • PV-T solar collector
  • CFD
  • Energetic and exergetic efficiency
  • Twisted tape insert
  • Microencapsulated phase change material
  • Wavy tubes

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