Theoretical and experimental analysis of the solar collectors performances

Khelifa, Abdelkrim; Touafek, K.; Boutina, Lyes; Tahar, B

doi:10.1049/iet-rpg.2017.0498

Cited by 3 publications

(3 citation statements)

References 32 publications

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“…In addition, the excess energy can be utilized in the form of heat. The hybrid system's thermal efficiency is calculated as follows 22 :…”

Section: Thermal Performancementioning

confidence: 99%

“…In addition, the excess energy can be utilized in the form of heat. The hybrid system's thermal efficiency is calculated as follows 22 :

η_{Thermal} = \frac{Q_{air}}{G \cdot A_{PV}},

Q air represents the gained thermal energy by the PVT air solar collector, and it is calculated as follows:

Q_{air} = \overset{•}{m} {italicCp}_{air} (T_{air, out} - T_{air, in}),

where

\overset{•}{m}

is the air mass flow rate,

{italicCp}_{air}

is the specific heat capacities of air.

\overset{•}{m} = ρ_{air} {normalA}_{out} U_{air, out}

…”

Section: Thermal and Electrical Performance Assessmentmentioning

confidence: 99%

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Experimental performance analysis of photovoltaic/thermal hybrid system cooled by forced ventilation

Boutina,

Khelifa,

Lebbi

et al. 2023

Env Prog and Sustain Energy

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Solar panels' efficiency is highly affected by high‐operating temperatures, especially in semi‐arid and arid regions. This outdoor experimental study aimed to enhance the energy performance of the photovoltaic module by integrating two fans at the outlet of the thermal/photovoltaic hybrid system to ensure forced ventilation. The work novelty depending on achieving low energy consumption by DC fans, so that there is a proportional relationship between the intensity of solar radiation and the energy produced and consumed. The influence of the reduced temperature, operating temperature, and solar radiation intensity on the energy performance of the photovoltaic/thermal hybrid system was analyzed experimentally. The obtained results showed an improvement in electrical and overall efficiency of the new hybrid system by about 4% and 60%, respectively, compared to the conventional photovoltaic module. On the contrary, a decrease in the temperature of the PV module installed in the hybrid system was measured by about 9°C, compared to the conventional photovoltaic module. In addition to the effectiveness of the new technology air cooling proposed at the lowest consumption cost, the thermal energy generated from the proposed system can be invested in solar drying and building applications.

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“…In addition, the excess energy can be utilized in the form of heat. The hybrid system's thermal efficiency is calculated as follows 22 :…”

Section: Thermal Performancementioning

confidence: 99%

“…In addition, the excess energy can be utilized in the form of heat. The hybrid system's thermal efficiency is calculated as follows 22 :

η_{Thermal} = \frac{Q_{air}}{G \cdot A_{PV}},

Q air represents the gained thermal energy by the PVT air solar collector, and it is calculated as follows:

Q_{air} = \overset{•}{m} {italicCp}_{air} (T_{air, out} - T_{air, in}),

where

\overset{•}{m}

is the air mass flow rate,

{italicCp}_{air}

is the specific heat capacities of air.

\overset{•}{m} = ρ_{air} {normalA}_{out} U_{air, out}

…”

Section: Thermal and Electrical Performance Assessmentmentioning

confidence: 99%

Experimental performance analysis of photovoltaic/thermal hybrid system cooled by forced ventilation

Boutina,

Khelifa,

Lebbi

et al. 2023

Env Prog and Sustain Energy

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“…This results in the reduction of the system efficiency (because semiconductor performance reduces with an increase in temperature). For improving the efficiency, a special arrangement can be made with PV devices in order to make a hybrid photovoltaic/thermal device (PV/T), which can produce thermal as well as electrical energy [61][62][63]. There are two types of arrangements for PV/T, (a) thermally coupled, and (b) thermally decoupled.…”

Section: Active Photovoltaicmentioning

confidence: 99%

Technological Advances to Maximize Solar Collector Energy Output: A Review

Salvi

Bhalla

Taylor

et al. 2018

Journal of Electronic Packaging

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Since it is highly correlated with quality of life, the demand for energy continues to increase as the global population grows and modernizes. Although there has been significant impetus to move away from reliance on fossil fuels for decades (e.g., localized pollution and climate change), solar energy has only recently taken on a non-negligible role in the global production of energy. The photovoltaics (PV) industry has many of the same electronics packaging challenges as the semiconductor industry, because in both cases, high temperatures lead to lowering of the system performance. Also, there are several technologies, which can harvest solar energy solely as heat. Advances in these technologies (e.g., solar selective coatings, design optimizations, and improvement in materials) have also kept the solar thermal market growing in recent years (albeit not nearly as rapidly as PV). This paper presents a review on how heat is managed in solar thermal and PV systems, with a focus on the recent developments for technologies, which can harvest heat to meet global energy demands. It also briefs about possible ways to resolve the challenges or difficulties existing in solar collectors like solar selectivity, thermal stability, etc. As a key enabling technology for reducing radiation heat losses in these devices, the focus of this paper is to discuss the ongoing advances in solar selective coatings and working fluids, which could potentially be used in tandem to filter out or recover the heat that is wasted from PVs. Among the reviewed solar selective coatings, recent advances in selective coating categories like dielectric-metal-dielectric (DMD), multilayered, and cermet-based coatings are considered. In addition, the effects of characteristic changes in glazing, absorber geometry, and solar tracking systems on the performance of solar collectors are also reviewed. A discussion of how these fundamental technological advances could be incorporated with PVs is included as well.

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