Thermo-economic modeling and optimization of a solar network using flat plate collectors

Hajabdollahi, Hassan; Khosravian, Mohammadreza; Dehaj, Mohammad Shafiey

doi:10.1016/j.energy.2021.123070

Cited by 12 publications

(4 citation statements)

References 26 publications

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“…In this line, Abu-Hamdeh et al [25] compared the energy efficiency between nanofluids containing paraffin wax/graphene and paraffin wax/graphene oxide phase change materials in flat plate solar collectors. Their results revealed similarities with Hajabdollahi et al [24], in the sense that including nanoparticles, combined with PCM, increases thermal conductivity, and thus better performance is observed, with even higher values than pure paraffin.…”

Section: Introductionsupporting

confidence: 79%

“…The numerical optimization is also possible not only for a single solar device. Hajabdollahi et al [24] studied different combinations for water heating solar collector piping. They implemented the fast and elitist non-dominated genetic algorithm to find the values of optimum design parameters such as bottom isolation, edge isolation, length of collector, width of collector, number of tubes, tube diameter, the number of collectors, and arrangement of collectors in the network.…”

Section: Introductionmentioning

confidence: 99%

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Numeric simulation and experimental validation for a Novel Trapezoidal Solar Collector

Salvo,

Dellicompagni,

Franco

et al. 2024

ACI Av. Cienc. Ing. (Quito)

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In a global warming context, the diversification of the energy matrix is essential for mitigation. Technologies and solar devices have begun to play an important role in this sense, being flat-plate solar collectors the most practical device. On the other hand, numerical modeling and experimental validation are important tools for improving the performance of these technologies. In this work, a trapezoidal solar air heating collector for food drying processes was modeled by using the Simusol open-access software, and experimental validation was performed. This particular shape presents a geometrical novelty since no other similar designs were found into the available literature, even in such application as food drying. Key parameters, such as air temperature, global efficiency, air mass flow, global heat loss coefficient, and useful heat, are determined and discussed. The proposed air collector numerically behaves as expected. The output air temperature reaches about 100 °C, while the peak heat gain is about 900 W, which makes the air heating collector suitable for drying applications. Due to natural convection is the main heat transferring mechanism, low air mass flows were obtained. For the case analyzed here, this last parameter ranges in 0.012–0.016 kg/s for the optimal thermal behavior.

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Section: Introductionsupporting

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Numeric simulation and experimental validation for a Novel Trapezoidal Solar Collector

Salvo,

Dellicompagni,

Franco

et al. 2024

ACI Av. Cienc. Ing. (Quito)

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“…The efficiency of the collector was decreased with the increase in nanoparticle size. Hajabdollahi et al 19 conducted a study for modelling and optimization of a solar network heater using flat plate collectors. Energy efficiency and cost ratio are both regarded as two objective functions.…”

Section: Introductionmentioning

confidence: 99%

Energy, exergy and economic (3E) analysis of flat-plate solar collector using novel environmental friendly nanofluid

Amar

Akram

Chaudhary

et al. 2023

Sci Rep

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The use of solar energy is one of the most prominent strategies for addressing the present energy management challenges. Solar energy is used in numerous residential sectors through flat plate solar collectors. The thermal efficiency of flat plate solar collectors is improved when conventional heat transfer fluids are replaced with nanofluids because they offer superior thermo-physical properties to conventional heat transfer fluids. Concentrated chemicals are utilized in nanofluids' conventional synthesis techniques, which produce hazardous toxic bi-products. The present research investigates the effects of novel green covalently functionalized gallic acid-treated multiwall carbon nanotubes-water nanofluid on the performance of flat plate solar collectors. GAMWCNTs are highly stable in the base fluid, according to stability analysis techniques, including ultraviolet–visible spectroscopy and zeta potential. Experimental evaluation shows that the thermo-physical properties of nanofluid are better than those of base fluid deionized water. The energy, exergy and economic analysis are performed using 0.025%, 0.065% and 0.1% weight concentrations of GAMWCNT-water at varying mass flow rates 0.010, 0.0144, 0.0188 kg/s. The introduction of GAMWCNT nanofluid enhanced the thermal performance of flat plate solar collectors in terms of energy and exergy efficiency. There is an enhancement in efficiency with the rise in heat flux, mass flow rate and weight concentration, but a decline is seen as inlet temperature increases. As per experimental findings, the highest improvement in energy efficiency is 30.88% for a 0.1% weight concentration of GAMWCNT nanofluid at 0.0188 kg/s compared to the base fluid. The collector's exergy efficiency increases with the rise in weight concentration while it decreases with an increase in flow rate. The highest exergy efficiency is achieved at 0.1% GAMWCNT concentration and 0.010 kg/s mass flow rate. GAMWCNT nanofluids have higher values for friction factor compared to the base fluid. There is a small increment in relative pumping power with increasing weight concentration of nanofluid. Performance index values of more than 1 are achieved for all GAMWCNT concentrations. When the solar thermal collector is operated at 0.0188 kg/s and 0.1% weight concentration of GAMWCNT nanofluid, the highest size reduction, 27.59%, is achieved as compared to a flat plate solar collector with water as a heat transfer fluid.

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“…Several parameters have practical relation to the thermal efficiency of a solar collector such as collector plate position, coating of collector plate, coating material, glazing material property, spacing between riser tubes concerning diameter, flow rate, the intensity of incident radiation, and bottom and side insulation thickness (Majumdar et al, 2020;Yassen et al, 2019). Among these, pipe diameter, pipe spacing, water flow rate, and radiation intensity are the major contributors affecting the collector efficiency (Hajabdollahi et al, 2022;Wang et al, 2019). Design modification is a facile way were tweaking the parameters can help improve compatibility in a solar energy harvesting device.…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of Solar Assisted Membrane Distillation for Seawater Desalination Using Solar Simulator

HANOIN¹,

MOKHTAR²

2022

EPSTEM

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Thermo-economic modeling and optimization of a solar network using flat plate collectors

Cited by 12 publications

References 26 publications

Numeric simulation and experimental validation for a Novel Trapezoidal Solar Collector

Numeric simulation and experimental validation for a Novel Trapezoidal Solar Collector

Energy, exergy and economic (3E) analysis of flat-plate solar collector using novel environmental friendly nanofluid

Performance Evaluation of Solar Assisted Membrane Distillation for Seawater Desalination Using Solar Simulator

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