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Recent Advances in Hybrid Photovoltaic/Thermal (PV/T) Solar Systems

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "A2: Solar Energy and Photovoltaic Systems".

Deadline for manuscript submissions: closed (30 September 2020) | Viewed by 14749

Special Issue Editor


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Guest Editor
Department of Chemical Engineering, University of Western Macedonia, Sialvera & Bakola Street, 50100 Kozani, Greece
Interests: renewable energy; solar energy; hybrid photovoltaics/thermal systems; concentrated solar systems; life cycle assessment of renewable energy and environmental systems; management of energy sources

Special Issue Information

Dear Colleagues,

Renewable energy systems (RES) will play a decisive role on the path towards meeting the energy demands of a growing global population and the economic needs of all countries. Nowadays, solar thermal systems (STS) and photovoltaics (PV) contribute globally over 470 GWth and 400 GWel, respectively, with significant growth rates. Hybrid photovoltaic/thermal (PV/T) systems combine STS and PV in one single unit, maximizing the total efficiency of solar energy conversion into heat and electricity. This Special Issue seeks to contribute to the knowledge of recent advances in hybrid PV/T systems. We therefore invite papers on innovative technical developments, reviews, case studies, experimental, analytical, as well as computational studies, which are relevant to hybrid PV/T systems.

Prof. Manolis Souliotis
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Energies is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Solar Thermal Systems
  • Photovoltaics
  • Hybrid Photovoltaics/Thermal systems
  • Energy and/or Exergy Analysis
  • Experimental Study
  • Computational Study
  • Analytical Study
  • Life Cycle Assessment of Hybrid PV/T Systems

Published Papers (3 papers)

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Research

17 pages, 2632 KiB  
Article
Energetic and Economic Analyses of an LCPV/T Solar Hybrid Plant for a Sports Center Building in Mexico
by Iván Acosta-Pazmiño, Carlos Rivera-Solorio and Miguel Gijón-Rivera
Energies 2020, 13(21), 5681; https://doi.org/10.3390/en13215681 - 30 Oct 2020
Cited by 10 | Viewed by 1936
Abstract
This study presents a techno-economic performance evaluation of a hybrid low-concentrating photovoltaic/thermal (LCPV/T) plant, which operates in a student sports and wellness center building situated at a university campus in Mexico. The solar plant comprises 144 LCPV/T collectors based on a hybridized version [...] Read more.
This study presents a techno-economic performance evaluation of a hybrid low-concentrating photovoltaic/thermal (LCPV/T) plant, which operates in a student sports and wellness center building situated at a university campus in Mexico. The solar plant comprises 144 LCPV/T collectors based on a hybridized version of a local parabolic trough technology. Dynamic thermal and electrical performance analyses were performed in the TRNSYS simulation studio. The results showed that the solar field could cover up to 72% of the hot water demand of the building during the summer season and 24% during the winter season. The hybrid system could annually save 7185 USD, accounting for heat (natural gas boiler) and electricity generation. However, the payback time was of 19.23 years, which was mainly attributed to a reduced natural gas price in Monterrey, Mexico. A new approach to evaluating the equivalent levelized cost of heat (LCOHeq), is proposed. This results in an LCOHeq of 0.065 USD/kWh, which is nearly equivalent to the LCOH of a natural gas-fired boiler (0.067 USD/kWh). Finally, the hybrid plant could achieve a specific CO2e emission reduction of 77.87 kg CO2e per square meter of the required installation area. Full article
(This article belongs to the Special Issue Recent Advances in Hybrid Photovoltaic/Thermal (PV/T) Solar Systems)
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20 pages, 4857 KiB  
Article
Hydrogen Generation from a Small-Scale Solar Photovoltaic Thermal (PV/T) Electrolyzer System: Numerical Model and Experimental Verification
by Metin Gül and Ersin Akyüz
Energies 2020, 13(11), 2997; https://doi.org/10.3390/en13112997 - 10 Jun 2020
Cited by 18 | Viewed by 7305
Abstract
In this study, the electrical, electrochemical and thermodynamic performance of a PV/T electrolyzer system was investigated, and the experimental results were verified with a numerical model. The annual amounts of electrical and thermal energy from the PV/T electrolyzer system were calculated as 556.8 [...] Read more.
In this study, the electrical, electrochemical and thermodynamic performance of a PV/T electrolyzer system was investigated, and the experimental results were verified with a numerical model. The annual amounts of electrical and thermal energy from the PV/T electrolyzer system were calculated as 556.8 kWh and 1912 kWh, respectively. In addition, the hydrogen production performance for the PV/T electrolyzer was compared with that of a PV electrolyzer system. The amount of hydrogen was calculated as 3.96 kg annually for the PV system, while this value was calculated as 4.49 kg for the PV/T system. Furthermore, the amount of hydrogen production was calculated as 4.59 kg for a 65 °C operation temperature. The electrical, thermal and total energy efficiencies of the PV/T system, which were obtained hourly on a daily basis, were calculated and varied between 12–13.8%, 36.1–45.2% and 49.1–58.4%, respectively. The hourly exergy analyses were also carried out on a daily basis and the results showed that the exergy efficiencies changed between 13.8–14.32%. The change in the electrolysis voltage was investigated by changing the current and temperature in the ranges of 200–1600 mA/cm2 A and 30–65 °C, respectively. While the current and the water temperature varied in the ranges of 400–2350 mA/cm2 and 28.1–45.8 °C respectively, energy efficiency and exergy efficiency were in the ranges of 57.85–69.45% and 71.1–79.7%, respectively. Full article
(This article belongs to the Special Issue Recent Advances in Hybrid Photovoltaic/Thermal (PV/T) Solar Systems)
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16 pages, 5402 KiB  
Article
Efficiency Improvement of a Photovoltaic Thermal (PVT) System Using Nanofluids
by Joo Hee Lee, Seong Geon Hwang and Gwi Hyun Lee
Energies 2019, 12(16), 3063; https://doi.org/10.3390/en12163063 - 9 Aug 2019
Cited by 70 | Viewed by 4800
Abstract
Many studies and considerable international efforts have gone into reducing greenhouse gas emissions. This study was carried out to improve the efficiency of flat-plate photovoltaic thermal (PVT) systems, which use solar energy to produce heat and electricity simultaneously. An efficiency analysis was performed [...] Read more.
Many studies and considerable international efforts have gone into reducing greenhouse gas emissions. This study was carried out to improve the efficiency of flat-plate photovoltaic thermal (PVT) systems, which use solar energy to produce heat and electricity simultaneously. An efficiency analysis was performed with various flow rates of water as the working fluid. The flow rate, which affects the performance of the PVT system, showed the highest efficiency at 3 L/min compared with 1, 2, and 4 L/min. Additionally, the effects of nanofluids (CuO/water, Al2O3/water) and water as working fluids on the efficiency of the PVT system were investigated. The results showed that the thermal and electrical efficiencies of the PVT system using CuO/water as a nanofluid were increased by 21.30% and 0.07% compared to the water-based system, respectively. However, the increase in electrical efficiency was not significant because this increase may be due to measurement errors. The PVT system using Al2O3/water as a nanofluid improved the thermal efficiency by 15.14%, but there was no difference in the electrical efficiency between water and Al2O3/water-based systems. Full article
(This article belongs to the Special Issue Recent Advances in Hybrid Photovoltaic/Thermal (PV/T) Solar Systems)
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