Energy and exergy assessment of new designed solar air heater of V-shaped transverse finned absorber at single- and double-pass flow conditions

Abo-Elfadl, Saleh; El-Dosoky, M.F.; Hassan, Hamdy

doi:10.1007/s11356-021-15163-z

Cited by 13 publications

(3 citation statements)

References 61 publications

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“…Single-pass, 11 roughness shapes type Phu and Luan [51] The EXEF was less than 2% for eleven rib type Single-pass, double glass, using rectangular fins or triangular fins Bahrehmand et al, [64] The EXEF less than 2% Double-pass with porous material Abo-Elfadl et al, [65] The highest EXEF was 3.6 % Double-pass with V-shaped finned Abo-Elfadl et al, [66] The highest EXEF was 2.5 % Jet pate Matheswaran et al, [53] The highest EXEF was 4.36 % Double-Pass with V rib-roughened Singh et al, [67] The EXEF was less than 5.5% Double-pass, double glass and longitudinal fins…”

Section: Resultsmentioning

confidence: 99%

The Effective and Exergy Efficiency of Multi-Pass Solar Air Collector with Longitudinal Fins: Analysis and Optimization

Nhut

Minh²,

Thanh³

2023

ARFMTS

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The present work investigates the exergy and effective efficiency of the multi-pass solar air collector with longitudinal fins by analysis approach and multi-objective optimization. The effect of 0.01-0.02 kg/s air flow rate, 15-35 mm collector depth, 1-3 m collector length, and 24.21-30.67 mm fin pitch was considered. The optimization was analyzed by the Preference Selection Index (PSI) method, with three maximum criteria: thermal efficiency, effective efficiency, and exergy efficiency. Mathematical models were solved by EES software. Results indicated that the multi-pass (TPLF and DPLF) type was better than the SPWF type by three criteria. The highest exergy efficiency of the TPLF and DPLF types was 6.696% and 5.636%. The greatest effective efficiency of the TPLF and DPLF types was 69.09% and 66.17%. Furthermore, the optimization results indicated that the three efficiency criteria of the DPLF type were 58.38%, 58.22%, and 4.491% for the best case; the three efficiency criteria of the TPLF type were 60.97%, 60.85%, and 5.439% for the best case. The worst configuration was the model with a short collector length, large collector depth, and large fin pitch. The collector efficiency decreased with decreased fin pitch for the configuration with the large collector length, short collector depth, and high mass flow rate.

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Section: Resultsmentioning

confidence: 99%

The Effective and Exergy Efficiency of Multi-Pass Solar Air Collector with Longitudinal Fins: Analysis and Optimization

Nhut

Minh²,

Thanh³

2023

ARFMTS

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“…2). The maximum useful energy gain that equals (292 W) has been achieved at an airflow rate of 0.03 kg/s by the DPSAHWT-2, although the outlet air temperature rise at this mass flow rate value is less than other values, and this is mainly due to dominating effect of Reynolds number that leads to increasing convective heat transfer rate, hence, capturing more thermal energy from solar absorber's surface (Abo-Elfadl et al 2021b).…”

Section: Useful Energy Rate and Effective Efficiencymentioning

confidence: 89%

Thermal Performance of Double Pass Solar Air Heater With Tubular Solar Absorber

Hussein

Ahmed

Ekaid

2022

Int. J. Renew. Energy Dev.

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In this investigation, the effect of replacing the conventional solar absorber with a new solar absorber on the thermal performance of a double-pass solar air heater has been studied experimentally and numerically. Three configurations have been introduced, the first configuration is a double pass solar air heater with a flat plate solar absorber (DPSAHWFP) for the aim of comparison, and the second configuration is a double pass solar air heater with a tubular absorber that includes a set of tubes which are fitted perpendicularly to the direction of airflow (DPSAHWT-1), and the third configuration is double-pass solar air heater with a tubular absorber that involves set of tubes which are fitted in parallel to the direction of airflow (DPSAHWT-2). The experiments have been carried out under indoor conditions at a constant heat flux equal to 1000 W/m2 and different air mass flow rates (0.01– 0.03 kg/s). The results revealed that the air mass flow rate has a substantial impact compared to the rise in air temperature, hence, the thermal performance of solar air heater is directly proportional to increase air mass flow rate. In addition, the experimental and numerical outcomes indicated that for all air flow rates. The (DPSAHWT-2) offers higher thermal performance as compared to other models, where the maximum effective efficiency has been obtained at 0.03 kg/s equal to 80.9 %. Moreover, (DPSAHWT-2) is more efficient than DPSAHWFP and DPSAHWT-1 by 4.2 % and 9.8 % respectively.

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“…Usually, the thermal performance of the solar collectors is not up to the mark because of the constructional, material, and working constraints (Kumar et al, 2020;Varun et al, 2021;. Different techniques can be used for improving the performance of solar collectors like artificial roughnesses (Azari et al, 2021), fins, and baffles (Abo-Elfadl et al, 2021), jet impingement (Goel and Singh, 2021), nanofluids (GaneshKumar et al, 2022), etc. Among all other techniques, the properties of the working fluid can be improved considerably with the suspension of the nano-sized particles in the base fluid (Choi 1995).…”

Section: Introductionmentioning

confidence: 99%

A novel design for solar collector used for water heating application having nanofluid as working medium: CFD modeling and simulation

Kumar

Kharub²,

Sharma

et al. 2022

Environ Sci Pollut Res

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A solar collector is a simple and cheap device that is capable of collecting and converting solar radiation into useful heat energy. The thermal performance of the solar collectors can be enhanced significantly with the suspension of nanoparticles in the base fluid. A novel design for a solarassisted water heater (SWH) is proposed in the current study and the effect of nanofluid has been investigated on the thermal efficiency of the SWH. The use of nanofluid is one of the prominent methods in comparison to other techniques for improving the performance of solar collectors and therefore, the base working fluid i.e. water is mixed with the alumina nanoparticles of average particle size of 30 nm, and they are assumed to be spherical. The flow and thermal characteristics of nanofluid through the solar water heater are simulated numerically with the help of the Eulerian-Eulerian two-phase model using the finite volume method (FVM). The commercial package i.e. ANSYS Fluent is used for modeling the problem under transient conditions with a pressure-based solver. In comparison to a conventional flat plate collector, the proposed solar water heater consists corrugated absorber-plate and the effect of radius of curvature of corrugation has been investigated on the heat transfer and collector efficiency. With the proposed design the heat transfer area available with the riser tubes increases remarkably and it leads to a 43% and 14% increase in heat transfer augmentation and collector efficiency, in comparison to the conventional solar water heater.

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Energy and exergy assessment of new designed solar air heater of V-shaped transverse finned absorber at single- and double-pass flow conditions

Cited by 13 publications

References 61 publications

The Effective and Exergy Efficiency of Multi-Pass Solar Air Collector with Longitudinal Fins: Analysis and Optimization

The Effective and Exergy Efficiency of Multi-Pass Solar Air Collector with Longitudinal Fins: Analysis and Optimization

Thermal Performance of Double Pass Solar Air Heater With Tubular Solar Absorber

A novel design for solar collector used for water heating application having nanofluid as working medium: CFD modeling and simulation

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