Experimental investigation of an optical water filter for Photovoltaic/Thermal conversion module

Wisam A.M. Al-Shohani, Aydin Sabouri, Raya Al-Dadah, Saad Mahmoud, Haider Butt

Research output: Contribution to journalArticlepeer-review

57 Scopus citations


This paper presents an experimental investigation of a novel optical water filter used for Photovoltaic/Thermal and Concentrating Photovoltaic/Thermal modules. A water layer is used as a spectrum splitter of solar radiation placed above the photovoltaic cells and as a thermal working fluid simultaneously. The water layer absorbs the ultraviolet and part of infrared, which are not used by the photovoltaic, but transmits the visible and some of infrared to the solar cell surface which are used by the photovoltaic. In this work, the transmittance of the optical water filter was measured for different water thicknesses (1, 2, 3, 4, and 5 cm) and radiation wavelength ranging from 0.35 to 1 μm. Results show that there is a significant effect of the water layer thickness on the transmittance of the spectra where the transmittance decreases as the water layer increases. Moreover, energy conversion rate of photovoltaic with the optical water filter at different water layer thicknesses has been determined.

Original languageBritish English
Pages (from-to)431-442
Number of pages12
JournalEnergy Conversion and Management
StatePublished - 1 Mar 2016


  • CPVT
  • Optical water filter
  • Photovoltaic
  • PVT
  • Spectrum splitter


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