Exergy analysis and kinetic study of tomato waste drying in a mixed mode solar tunnel dryer

Murugavelh, S.; Anand, B.; Prasad, K.; Nagarajan, R.

doi:10.1080/15567036.2019.1679289

Cited by 38 publications

(12 citation statements)

References 44 publications

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“…Due to the reaction processes' inevitable irreversibility, exergy does not adhere to the conservation law. In pyrolysis, the conversion of biomass into char, gas, and oil, irreversibility occurs due to the mixing of the biomass with gas, the heat transfer from the biomass to the reaction zone, and the chemical reactions that take place [58]. The exergy balancing equation may be expressed as follows under the assumptions that pyrolysis is a defined volume unit, input exergy is from biomass and heat, output exergy is from product gas, oil, and char, and the irreversibility (internal exergy loss) is in the lost component [50].…”

Section: Exergy Balancementioning

confidence: 99%

Understanding the pyrolysis kinetics, thermodynamic, and environmental sustainability parameters of Sesamum indicum crop residue

Sivaraman,

Shanmugam,

Veerapandian

et al. 2023

Environ. Res. Commun.

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In this work, the physiochemical characteristics, thermodynamics, and sustainability of the pyrolysis of Sesamum indicum biomass were assessed. The pyrolysis kinetics of sesame agro-residues performed using isoconversional techniques such as Kissinger, KAS, and OFW methods showed activation energies of 192, 120, and 123 kJ mol−1, respectively. The impact of the pyrolysis temperature (550, 650, 750 °C) on the generation of biochar, bio-oil, and gas is also studied; the exergy efficiency increased from 82.7 at 550 °C to 87.3% at 750 °C with an increase in the temperature. Sesame biochar’s Van Krevalan diagram showed how its fuel-like characteristics also grew with rising temperatures. The input and output parameters showed a high agreement in the mass, energy, and exergy balance closures. However, it was shown that the overall energy efficiency was greater at 750 °C (71.2%) compared to 55.5% and 69.8% at 550 °C and 650 °C, respectively. Sustainability analysis showed that lower temperatures had a smaller impact on the environment.

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Section: Exergy Balancementioning

confidence: 99%

Understanding the pyrolysis kinetics, thermodynamic, and environmental sustainability parameters of Sesamum indicum crop residue

Sivaraman,

Shanmugam,

Veerapandian

et al. 2023

Environ. Res. Commun.

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“…In general, it has been determined that the exergy efficiencies of LED and DLST + LED modes were lower than the DLST mode for all light intensities, similar to the findings for the energy efficiencies. In the literature, it has been reported that energy and exergy efficiencies in food drying processes can vary between 9% and 86% and between 2% and 60%, respectively (Dolgun, Karaca, & Aktas ¸, 2020;Golpour, Kaveh, Chayjan, & Guiné, 2020;Icier, Ozmen, Cevik, & Cokgezme, 2021;Kavak Akpinar, 2019;Murugavelh, Anand, Midhun Prasad, Nagarajan, & Azariah Pravin Kumar, 2019;Tagnamas et al, 2021;Tezcan, Sabancı, Cevik, Cokgezme, & Icier, 2021). The differences are related to the system conditions, process parameters, different expressions for efficiency, drying method and system designs, and so on.…”

Section: Performance Evaluation Of Process Conditionsmentioning

confidence: 99%

Drying of tomato pomace in daylight simulated photovoltaic‐assisted drying system: Effects of daylight intensity and application mode

Bayana

İçıer

2022

J Food Process Engineering

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It was aimed to dry a by-product of tomato paste production (tomato pomace) by minimizing the losses valuable components and reducing energy consumption. In this concept, a daylight simulated photovoltaic-assisted dryer (DPVD) applying the daylight in different modes and intensities during drying was custom-designed. The effects of daylight applications on the change of some quality characteristics of tomato pomace and system performance characteristics were investigated, and the optimum drying condition was determined. The process conditions included the combination of three different daylight application modes (UV-blocked daylight via solar tube-DLST, DLST + LED, and LED) and three different daylight intensities (2,500, 7,500, and 10,000 lux). The drying was applied for 240 min at constant air temperature (60 C) with an air velocity of 2 m/s. The moisture content and the water activity values of dried tomato pomace were 8.86 ± 2.00% and 0.57 ± 0.10%, respectively.The lycopene and β-carotene losses after drying were determined as 68.36 ± 4.32% and 65.66 ± 4.33%, respectively. The energy and exergy efficiencies of the system were in the range of 19.56%-35.73% and 5.10%-17.05%, respectively. The optimum condition meeting the criteria of superior quality and high-performance characteristics was obtained by applying DLST at 7,500 lux (desirability 0.728). In the performance improvement studies, it has been concluded that all the energy required for the process could have been fulfilled as 100% from solar energy with the support of photovoltaic panels. In other words, it was demonstrated that the developed DPVD system could be used to dry the tomato pomace not only in terms of providing high food quality and safety, but also in terms of having high energy efficiency. Practical applicationsExposure to the daylight is important to dry some foods. Especially in north countries, products are dried in artificial dryers, but it requires high energy consumption.In this study, the daylight transfer system was integrated into the artificial dryer for the purpose of using daylight effect in addition to the photovoltaic (PV) assistance for using solar energy. During periods when the solar thermal effect is not intense or in countries where the sun effect is limited, it will be possible to dry food products

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“…Open sun drying which is generally used to dry agriculture products under direct sunlight can produce dried products rich in color [5], but it leads to the growth of harmful microorganisms, produce toxic compounds by fungi [6], and contamination of food by environmental pollutants (such as dust, dirt, and insects) [5].In contrast, solar drying as an environmentally friendly and green technology [7] can improve the quality parameters of food and decrease the risk of microbial, chemical, and environmental contamination [8]. Solar drying of various agriculture products has been studied by different authors [7,[9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

An artificial neural network modeling of solar drying of mint: Energy, exergy, and drying kinetics

Gülçimen,

Karakaya,

Durmuş

2024

Preprint

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The energy and exergy analysis of thin-layer drying of mint leaves was performed in a forced convective solar dryer with new design solar collector. The effects of inlet airflow rates on the energy utilization ratio (EUR), energy generated by the solar air collector, exergy losses, exergy efficiency, and kinetics of drying were determined. The EUR varied between 7.45 to 87.1% and it increased when the flow rate decreased. The average exergy loss for the air with mass flow rates of 0.012, 0.026, and 0.033 kg/s was calculated as 16.2 W, 8.2 W, and 6.88 W, respectively. Unlike other studies, exergy and EUR data obtained from experimental data were modeled with an artificial neural network (ANN). The experimental data were modeled by an artificial neural network (ANN) via a feed-forward back-propagation network. The values obtained from ANN modeling were significantly closed to the experimental values. In both experimental and ANN models, EUR and exergy loss decreased with increasing airflow rate. The importance of airflow rates was promising to modify EUR and exergy losses.

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Exergy analysis and kinetic study of tomato waste drying in a mixed mode solar tunnel dryer

Cited by 38 publications

References 44 publications

Understanding the pyrolysis kinetics, thermodynamic, and environmental sustainability parameters of Sesamum indicum crop residue

Understanding the pyrolysis kinetics, thermodynamic, and environmental sustainability parameters of Sesamum indicum crop residue

Drying of tomato pomace in daylight simulated photovoltaic‐assisted drying system: Effects of daylight intensity and application mode

An artificial neural network modeling of solar drying of mint: Energy, exergy, and drying kinetics

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