Develop of Local Flat Plate Solar Heater

El-Sebaee, I. M.

doi:10.21608/jssae.2021.179014

Cited by 2 publications

(3 citation statements)

References 2 publications

(2 reference statements)

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“…The solar collector's performance is represented by the temperature of the outlet air, as well the efficiency is dependent on the location of the solar collector, collector surface, temperature, and the velocity of ambient air. Hence, the balanced energy of the solar collector was described in the following equations (Equations 2–6) according to (Dagdougui et al., 2011; Elsebaee, 2021; Musembi et al., 2016):

\begin{equation}Sr\left( {{\tau }_{ct}\ {\alpha }_{ap}} \right){A}_{fpsc} = {Q}_{hg} + {Q}_{ahl} \cdots \end{equation}

where

Sr

is the solar radiation value (W/m 2 ) which depends on the transmittance value (

{\tau }_{ct}

) of the cover (tempered) and the absorptive of the absorber plate (

{\alpha }_{ap}

{A}_{fpsc}

is the area of the flat‐plate solar collector (FPSC) (m 2 ), whereas the other side of the equation consists of the

{Q}_{hg}

is the useful flat‐plate heat gain (W), and

{Q}_{ahl}

represents the heat rate loss of the FPSC (W). Thus, the value of both the

{Q}_{hg}

and

{Q}_{\textit{ahl}}

can be obtained from the following equations:

Q_{h g} badbreak= A_{f p s c} (...)

…”

Section: Methodsmentioning

confidence: 99%

Development and evaluation of a hybrid smart solar dryer

Ibrahim,

Elsebaee,

Amer

et al. 2023

Journal of Food Science

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A hybrid smart solar dryer (HSSD) based on indirect forced convection and a controlled auxiliary heating system was developed, fabricated, and tested to be convenient for sunny and cloudy weather conditions. The achievements of the developed dryer focus on controlling the temperature of the dryer, increasing the drying rate, reducing energy consumption, and providing high‐quality products. The HSSD was tested and evaluated for drying basil and sage herbs at 30, 40, and 50°C. The results showed that the fresh basil and sage leaves of 1 kg with a moisture content of 84.7% and 75.53% (wet basis) were dried within 58, 46, 32 and 38, 28, and 20 h at 30, 40, and 50°C, respectively. Correspondingly, the traditional drying methods achieved 96 h outdoors and 144 h indoors at room temperature. The average of the fabricated flat‐plate solar collector efficiency (thermal efficiency, ηfpsc) was ranged from 49.18% ± 9.52% to 66.02% ± 2.8%. The highest drying rates were achieved with the HSSD method. Moreover, the HSSD method led to a remarkable saving in energy with values ranging from 25.54% to 77.1% versus the traditional drying methods. While the best quality in terms of essential oil content and microbial load for the dried basil and sage herbs was achieved by the HSSD at 40°C. Finally, the HSSD is a promising energy‐efficient method where it can save 70% of energy consumption, thus reducing the carbon footprint of drying processes, and providing higher quality products compared to the conventional methods.

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\begin{equation}Sr\left( {{\tau }_{ct}\ {\alpha }_{ap}} \right){A}_{fpsc} = {Q}_{hg} + {Q}_{ahl} \cdots \end{equation}

where

Sr

is the solar radiation value (W/m 2 ) which depends on the transmittance value (

{\tau }_{ct}

) of the cover (tempered) and the absorptive of the absorber plate (

{\alpha }_{ap}

{A}_{fpsc}

is the area of the flat‐plate solar collector (FPSC) (m 2 ), whereas the other side of the equation consists of the

{Q}_{hg}

is the useful flat‐plate heat gain (W), and

{Q}_{ahl}

represents the heat rate loss of the FPSC (W). Thus, the value of both the

{Q}_{hg}

and

{Q}_{\textit{ahl}}

can be obtained from the following equations:

Q_{h g} badbreak= A_{f p s c} (...)

…”

Section: Methodsmentioning

confidence: 99%

Development and evaluation of a hybrid smart solar dryer

Ibrahim,

Elsebaee,

Amer

et al. 2023

Journal of Food Science

View full text Add to dashboard Cite

show abstract

“…The overall top heat transfer coefficient losses (U ot ) for the local solar collector (LSC) were determined using (Equation ( 6)) [36]:…”

Section: Overall Top Heat Transfer Coefficient Losses Calculationsmentioning

confidence: 99%

“…Additional considerations include the glass cover emissivity (ε g1 ), absorber plate emissivity (ε p1 ), and glass temperature (T g1 ). The Stefan-Boltzmann constant, σ, (5.67 × 10 −8 W/m 2 K 4 ), also comes into play in these calculations [36][37][38][39].…”

Section: Overall Top Heat Transfer Coefficient Losses Calculationsmentioning

confidence: 99%

Harnessing Solar Energy: A Novel Hybrid Solar Dryer for Efficient Fish Waste Processing

Deef,

Samy Helal,

El-Sebaee

et al. 2023

AgriEngineering

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Facing severe climate change, preserving the environment, and promoting sustainable development necessitate innovative global solutions such as waste recycling, extracting value-added by-products, and transitioning from traditional to renewable energy sources. Accordingly, this study aims to repurpose fish waste into valuable, nutritionally rich products and extract essential chemical compounds such as proteins and oils using a newly developed hybrid solar dryer (HSD). This proposed HSD aims to produce thermal energy for drying fish waste through the combined use of solar collectors and solar panels. The HSD, primarily composed of a solar collector, drying chamber, auxiliary heating system, solar panels, battery, pump, heating tank, control panel, and charging unit, has been designed for the effective drying of fish waste. We subjected the fish waste samples to controlled drying at three distinct temperatures: 45, 50, and 55 °C. The results indicated a reduction in moisture content from 75.2% to 24.8% within drying times of 10, 7, and 5 h, respectively, at these temperatures. Moreover, maximum drying rates of 1.10, 1.22, and 1.41 kgH2O/kg dry material/h were recorded at 45, 50, and 55 °C, respectively. Remarkable energy efficiency was also observed in the HSD’s operation, with savings of 79.2%, 75.8%, and 62.2% at each respective temperature. Notably, with an increase in drying temperature, the microbial load, crude lipid, and moisture content decreased, while the crude protein and ash content increased. The outcomes of this study indicate that the practical, solar-powered HSD can recycle fish waste, enhance its value, and reduce the carbon footprint of processing operations. This sustainable approach, underpinned by renewable energy, offers significant environmental preservation and a reduction in fossil fuel reliance for industrial operations.

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Develop of Local Flat Plate Solar Heater

Cited by 2 publications

References 2 publications

Development and evaluation of a hybrid smart solar dryer

Development and evaluation of a hybrid smart solar dryer

Harnessing Solar Energy: A Novel Hybrid Solar Dryer for Efficient Fish Waste Processing

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