Photovoltaic -Thermal systems (PVT): Technology review and future trends

Joshi, Sandeep; Dhoble, Ashwinkumar S.

doi:10.1016/j.rser.2018.04.067

Cited by 310 publications

(91 citation statements)

References 133 publications

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“…The efficiency of the photovoltaic panel is comparable with the one that does not have a solar collector, and for the solar collector, the efficiency is around 40%. The efficiency of the hybrid system is much higher than that of a conventional system [65]. Yang and Yin found that the maximum power of the PV panel in hybrid systems increases with 23% in comparison with PV panel alone, and the solar thermal collector generates 661 W/m 2 [66].…”

Section: Water Coolingmentioning

confidence: 99%

Multiconcept Methods to Enhance Photovoltaic System Efficiency

Cotfas

2019

International Journal of Photoenergy

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The main goal of this paper is to review the most important methods previously developed to enhance the efficiency and increase the lifetime of photovoltaic panels. The methods to increase the solar radiation incident on photovoltaic panels, as well as the cooling and the maximum power point tracker methods, are concisely presented in this paper. The pros and cons analysis reveals that the methods to enhance the power generated by the photovoltaic panels are strongly dependent on geographical location, climatic conditions, and the materials used. This review paper is also of interest for engineers who attempt to identify the most adequate solutions to maximize the energy output of photovoltaic systems for each location.

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Section: Water Coolingmentioning

confidence: 99%

Multiconcept Methods to Enhance Photovoltaic System Efficiency

Cotfas

2019

International Journal of Photoenergy

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“…The concept of "electrify everything" considers solar energy as a key renewable technology with an aim of de-carbonization of domestic heating demand [1]. The rapid growth in photovoltaic (PV) installation capacity from the last few years has further strengthened the importance of PV as the main driver of renewable transformation [2]. PV remains an interesting subject area for many researchers, global leaders, and manufacturers because of its reliability, sustainability, ease of installation, and economic feasibility [3].…”

Section: Background and Existing Studiesmentioning

confidence: 99%

Digital Mapping of Techno-Economic Performance of a Water-Based Solar Photovoltaic/Thermal (PVT) System for Buildings over Large Geographical Cities

et al. 2020

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Solar photovoltaic thermal (PVT) is an emerging technology capable of producing electrical and thermal energy using a single collector. However, to achieve larger market penetration of this technology, it is imperative to have an understanding of the energetic performance for different climatic conditions and the economic performance under various financial scenarios. This paper thus presents a techno-economic evaluation of a typical water-based PVT system for a single-family house to generate electricity and domestic hot water applications in 85 locations worldwide. The simulations are performed using a validated tool with one-hour time step for output. The thermal performance of the collector is evaluated using energy utilization ratio and exergy efficiency as key performance indicators, which are further visualized by the digital mapping approach. The economic performance is assessed using net present value and payback period under two financial scenarios: (1) total system cost as a capital investment in the first year; (2) only 25% of total system cost is a capital investment and the remaining 75% investment is considered for a financing period with a certain interest rate. The results show that such a PVT system has better energy and exergy performance for the locations with a low annual ambient temperature and vice versa. Furthermore, it is seen that the system boundaries, such as load profile, hot water storage volume, etc., can have a significant effect on the annual energy production of the system. Economic analysis indicates that the average net present values per unit collector area are 1800 and 2200 EUR, respectively, among the 85 cities for financial model 1 and financial model 2. Nevertheless, from the payback period point of view, financial model 1 is recommended for locations with high interest rate. The study is helpful to set an understanding of general factors influencing the techno-economic performance dynamics of PVT systems for various locations.

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“…According to a recent report by the International Renewable Energy Agency, 98.7% of the total electricity generated from solar sources worldwide is from PV systems. Although solar radiation has a wavelength ranging between 0.25 and 2.5 μm, only a portion of the energy available in this spectrum can be directly converted to electricity using PV panels . Moreover, typical electrical conversion efficiencies of commonly used PV panels rarely exceed 20%.…”

Section: Introductionmentioning

confidence: 99%

Numerical study on photovoltaic/thermal systems with extended surfaces

et al. 2019

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Summary The current study presents a novel and straightforward approach for simulating photovoltaic/thermal (PV/T) systems using the commercial computational fluid dynamics (CFD) solver ANSYS‐FLUENT. Instead of resolving the natural convection within the air gap between the PV and the glass cover, the effective thermal conductivity approach is implemented. Moreover, the solar radiation incident on the PV layer is directly included in the energy equation of the PV domain to evaluate the resultant power output and heat generation. The validity of these implications is proven by comparing predicted data with experimental data from the literature. Comparative results reveal a root‐mean‐square error of 7% and 2% for the PV temperature and the outlet air temperature, respectively. A comprehensive numerical analysis is also conducted for a PV/T system with and without finned surfaces. In the parametric study, the impacts of varying a number of design parameters, operating conditions, and weather data over a wide range are assessed. Results reveal that channel height and air velocity have the greatest impact on the overall efficiency and outlet air temperature of a PV/T system. An optimization study is also conducted using the response surface methodology to obtain optimal values of design parameters and operating conditions for this system. The highest overall efficiencies and outlet air temperatures are achieved in PV/T systems comprising narrow channel geometries, regardless of the operating conditions or weather data considered. Optimal conditions are achieved for a collector with a collector length of 1.5 m, a channel height of 1 cm, and an air velocity of 2.3 m/s. For the optimal design, overall efficiency and outlet temperature values are evaluated as 53.4% and 310.9 K, respectively. Sensitivity analyses also observe the impact of adding fins to the air channel, and it is concluded that the addition of fins improves the overall efficiency of the PV/T system by up to 19%. However, adding fins does not significantly affect the outlet air temperature; nor does it improve the overall efficiency of the PV/T system beyond a critical channel height.

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Photovoltaic -Thermal systems (PVT): Technology review and future trends

Cited by 310 publications

References 133 publications

Multiconcept Methods to Enhance Photovoltaic System Efficiency

Multiconcept Methods to Enhance Photovoltaic System Efficiency

Digital Mapping of Techno-Economic Performance of a Water-Based Solar Photovoltaic/Thermal (PVT) System for Buildings over Large Geographical Cities

Numerical study on photovoltaic/thermal systems with extended surfaces

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