Design and performance evaluation of solar - LPG hybrid dryer for drying of shrimps

Murali, S.; Amulya, P.R.; Alfiya, P.V.; Delfiya, D.S. Aniesrani; Samuel, Manoj P.

doi:10.1016/j.renene.2019.10.002

Cited by 88 publications

(24 citation statements)

References 31 publications

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“…As drying progresses, the amount of free moisture content reduces, leaving bound moisture content to be evaporated, which is located inside the internal tissue of the vermicelli. Indeed, compared with free moisture, it is more difficult to evaporate bound moisture; accordingly, evaporating bound moisture slows down the drying process and gradually decreases the drying rate (Anum et al, 2017;Murali et al, 2020) Therefore, the drying time required to evaporate the bound moisture content is much longer compared with the free moisture content, as seen in Figure 4 during the latter part of the drying process (Karam, Petit, Zimmer, Baudelaire Djantou, & Scher, 2016). from the figure that the solar radiation increases gradually, with similar pattern for all drying variables.…”

Section: Color Analysismentioning

confidence: 81%

“…It can be seen from Figure 3 that significant differences exist with respect to reductions in the moisture content using the hybrid solar drying comparedwith the open-sun and natural solar-dryer methods. This is because the addition of LPG causes the dryer to gain more heat, resulting in faster drying(Murali, Amulya, Alfiya, Delfiya, & Samuel, 2020). During hybrid solar drying, it is evident that using a high temperature increases moisture reduction(Gupta, Cox, & Abu-Ghannam, 2011).…”

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confidence: 99%

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Hybrid solar dryer for sugar‐palm vermicelli drying

Suherman

Utami

Ningrum

2020

J Food Process Engineering

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Sugar palm is an abundant palm in Indonesia and widely used for various foods, one of which is vermicelli. During vermicelli production, local farmers still implement open‐sun drying, which reduces the quality of vermicelli, requires long periods of time, and cannot be performed during poor weather. Therefore, in this study, a new method of vermicelli drying is introduced using a hybrid solar dryer, which consists of a solar dryer and an additional heater powered by liquefied natural gas. Hybrid solar drying is conducted at 40, 60, 80, and 100°C. With 2 hr of drying time, the final moisture contents of vermicelli dried using hybrid solar dryer have satisfy the standard limit, while the open‐sun drying and natural solar drying do not, indicating that hybrid solar drying is faster and more effective. Vermicelli drying occurs at the falling‐rate period and increasing drying temperature from 40 to 100°C increases dryer efficiency, energy utilization ratio, and exergy efficiency, from 13.02 to 17.02%, from 0.18 to 0.32, and from 67.4 to 83.6%, respectively. Although the overall quality of dried vermicelli is acceptable, increasing drying temperature from 40 to 100°C result in the damaged vermicelli surface as evident from SEM analysis and degradation of vermicelli whiteness value from 87.2 to 82.5. Practical applications The drying process is playing an important role in heat sensitive products dehydration. The present study provides an investigation of potential use of solar energy for drying of vermicelli which combine with the natural gas heating process. The results show that hybrid drying system could enhance the product quality of vermicelli and also reduce the drying process. During drying, proximate components of vermicelli essentially do not change but it alters the color of product.

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Section: Color Analysismentioning

confidence: 81%

mentioning

confidence: 99%

Hybrid solar dryer for sugar‐palm vermicelli drying

Suherman

Utami

Ningrum

2020

J Food Process Engineering

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“…Integrating the additional heat source in a solar dryer can increase the efficiency of the system. Murali, Amulya, Alfiya, Delfiya, & Samuel [89] utilized a liquefied petroleum gas (LPG) water heater as a hybrid element in their solar dryer to dry shrimp. The energy supplied by the solar system was 2,06,641 kJ (73.93%), while the LPG water heater auxiliary system provided 72,890 kJ (26.07%).…”

Section: Recent Advancement Of Solar Drying Technologymentioning

confidence: 99%

Recent advances in solar drying system: A Review

Razak

Tarminzi²,

Azmi³

et al. 2021

IJETS

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Research on solar dryer technology proliferates since it reduces the drying period while keeping nutritional values in the agricultural products. This paper presented a review of recent advances in the solar drying system. This review is composed of working principles and classifications of solar dryers. They were classified into two main elements: airflow modes, either passive or active, and the way heat is transferred: direct, indirect, mixed-mode, and hybrid. The hybrid system used several types of elements to supply additional heat in the drying system, as elaborated in this paper, such as the electrical heater, biomass, and photovoltaic system. The advantages and disadvantages of the solar dryer also being discussed in this paper

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“…External auxiliary heating of the air is also applied to dry during the off-sun period. This system requires electricity (Ouaabou et al, 2020) or heat provided by the combustion of fossil fuels (Smitabhindu et al, 2008;Murali et al, 2020) or biomass (Ait Hammou and Lacroix, 2006;Madhlopa and Ngwalo, 2007;Kiburi et al, 2020;Manrique et al, 2020). The analysis and control of the solar drying process are mainly based on the evaluation of drying kinetics, i.e., the mass loss over time and the remaining water activity of the product (Mustapha et al, 2014;Li et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Physics-Based Digital Twin Identifies Trade-Offs Between Drying Time, Fruit Quality, and Energy Use for Solar Drying

Prawiranto

Carmeliet²,

Defraeye

2021

Front. Sustain. Food Syst.

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Solar drying is regarded as a less reliable process compared to continuous hot-air drying due to the intermittency of solar radiation. This problem is mitigated by equipping solar dryers with thermal storage, dehumidifier units, or auxiliary heating that enhances drying continuity during night time. In this study, we combine a mechanistic fruit drying model, quality models (vitamin C decay and browning reaction) and weather data to evaluate the drying characteristics and quality evolution of apple fruit with and without the aforementioned improvement strategies. By coupling to measured weather conditions, a digital twin of the drying fruit is established. The twin outputs drying times and final product quality for a specific fruit type and size, a particular dryer configuration, and specific weather conditions. The trade-offs between drying time, final product quality and energy use for the different improvement strategies of solar drying are documented. We found that solar drying may benefit from the slower drying due to the improvement of product quality. Compared to the other improvement strategies, dehumidification of the drying air is shown to be superior in retaining the vitamin C content and prohibiting the browning reaction. However, in general, drying with auxiliary heating is found to balance the trade-offs between drying time, final product quality and energy use since the weather-dependency of the process is mitigated. Additionally, we quantified the impact of a pre-treatment process that modifies the permeability of the fruit tissue by breaking the cell membrane. We found that inducing such lysis is more effective in decreasing the drying time when drying is conducted at low (room) temperature. This study shows that using the developed digital twin, future drying process and control strategies could be optimized in real-time for every single drying run.

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Design and performance evaluation of solar - LPG hybrid dryer for drying of shrimps

Cited by 88 publications

References 31 publications

Hybrid solar dryer for sugar‐palm vermicelli drying

Hybrid solar dryer for sugar‐palm vermicelli drying

Recent advances in solar drying system: A Review

Physics-Based Digital Twin Identifies Trade-Offs Between Drying Time, Fruit Quality, and Energy Use for Solar Drying

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