Solar air collector performance in transient operation under radiative regimes with different levels of stability

Badescu, Viorel; Soriga, Iuliana; Ciocănea, Adrian

doi:10.1016/j.solener.2018.11.002

Cited by 22 publications

(6 citation statements)

References 24 publications

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“…One of the simple and direct applications of this natural and free energy is the conversion of the solar irradiation into heat, which can be used either for solar heating of building, solar refrigeration, industrial processes, and the solar collector. In this last case, conversion is done using the collectors, with the aim of heating water or air for domestic uses [2] and industrial applications [3,4]. It can also be employed for the drying of the agricultural produce.…”

Section: Introductionmentioning

confidence: 99%

Influence of Geometric Parameters on the Thermal Performances of a Double Air Pass Solar Collector

Abraham¹,

Ghiaus²

2019

SJEE

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This work focused on the numerical study of the thermal performance of a solar collector in order to improve the indirect solar drying of fruit in an environment with high solar potential. It aims to contribute to the reduction of post-harvest losses observed during periods of high production. From the retained physical model, an equivalent electrical scheme has been established and energy balance was applied to each slice of the model using the nodal method. The obtained different equations were discretized using the implicit method of finite differences, and solved by the iterative Gaussian Pivot method written in FORTRAN program. The obtained results showed that, from April to June (mangoes harvest period in Ngaoundere city) the raining period in Adamawa Region, the solar air collector that length to width ratio is between 2 and 3, is sufficient to carry out indirect solar drying of fruits with forced convection. The outlet air temperature of the solar collector was between 45 and 60°C with an average value of 50°C, and the thermal efficiency was between 65 and 95% with an average value of 80%. Double glazing improves efficiency of the solar air collector for a small footprint.

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Section: Introductionmentioning

confidence: 99%

Influence of Geometric Parameters on the Thermal Performances of a Double Air Pass Solar Collector

Abraham¹,

Ghiaus²

2019

SJEE

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“…[25][26][27][28]. To improve the dis-advantages of solar air heaters, a range of numerical simulations has been performed for thermal performance optimization [29][30][31]. A mathematical model based on a numerical finite-difference approach was proposed for a flat-plate solar air collector in reference [32].…”

Section: Author Types Diagram Inferencementioning

confidence: 99%

Thermal Characteristics and Parametric Analysis of an Improved Solar Wall

Zhao

Zhu

et al. 2021

Applied Sciences

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Solar air collectors installed on buildings can significantly reduce conventional energy consumption in winter and summer. However, some problems arise in the utilization process, such as overheating, inconvenient operation control and low energy efficiency, etc. This work is a parametric analysis focusing on the automatic control and thermal efficiency improvement of the solar wall. An improved color-changing solar wall integrated with automatic control components, such as a photoelectric fan and temperature-controlled damper, was proposed in this paper. Based on the experimental data, the average daily heat output of the color-changing solar wall is 1.08 MJ per unit floor area on clear days in winter and the average thermal efficiency is 56.8%. Meanwhile, a quantitative analysis was carried out based on monitoring experiments for evaluating the thermal characteristic of automatic control components. Furthermore, in order to improve the thermal performance of the solar wall, parametric analysis was performed by numerical simulation. Results from this paper can provide a theoretical basis for the application of solar air collectors in modern buildings.

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“…In a study by Kabeel et al (2016), the efficiency of the heater using phase change materials was found in the range of 14.4-50% [29]. A heater with corrugated and porous surface was analyzed by Badescu et al (2019). According to the obtained results, the thermal efficiency value varies in the range of 52.5-66.2% [30].…”

Section: Fig 7 Time-dependent Variation Of Thermal Efficiency Valuesmentioning

confidence: 99%

“…A heater with corrugated and porous surface was analyzed by Badescu et al (2019). According to the obtained results, the thermal efficiency value varies in the range of 52.5-66.2% [30]. In the study by Abuşka and Şevik (2017), a heater with v-grooves was designed and tested with absorber surfaces with different materials.…”

Section: Fig 7 Time-dependent Variation Of Thermal Efficiency Valuesmentioning

confidence: 99%

Empirical Investigation of Small-Scale Aluminium Wool Packed Solar Air Heater Made with Waste Material

Sözen¹,

Khanları

Tuncer

et al. 2021

Politeknik Dergisi

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Solar air collector performance in transient operation under radiative regimes with different levels of stability

Cited by 22 publications

References 24 publications

Influence of Geometric Parameters on the Thermal Performances of a Double Air Pass Solar Collector

Influence of Geometric Parameters on the Thermal Performances of a Double Air Pass Solar Collector

Thermal Characteristics and Parametric Analysis of an Improved Solar Wall

Empirical Investigation of Small-Scale Aluminium Wool Packed Solar Air Heater Made with Waste Material

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