Performance evaluation, morphological properties and drying kinetics of untreated Carica Papaya using solar hybrid dryer integrated with heat storage material

AR., Umayal Sundari; Veeramanipriya, E.

doi:10.1016/j.est.2022.105679

Cited by 18 publications

(8 citation statements)

References 45 publications

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“…The performance comparisons of solar dryers with TES and without TES materials and OSD from the present study and various published works are summarized in Table . The results of this study are in good agreement with previous studies, such as the findings reported by AR and Veeramanipriya, who compared the performance of solar dryers integrated with TES, without TES, and open OSD and found that the solar dryer integrated TES materials performed better as compared to the one without TES materials and OSD.…”

Section: Resultssupporting

confidence: 92%

“…The independent variables affecting measurements were determined by using eq according to AR and Veeramanipriya w n = false( W instument false) 2 + false( W reading false) 2 The overall errors in the measurement of different parameters are given by eq , which is a simplified equation from eq w total = false( W temperature false) 2 + false( W humidity false) 2 + false( W solar .25em radition false) 2 + false( W wind false) 2 + false( W normalw .25em scale false) 2 …”

Section: Methodsmentioning

confidence: 99%

“…The independent variables affecting measurements were determined by using eq according to AR and Veeramanipriya The overall errors in the measurement of different parameters are given by eq , which is a simplified equation from eq …”

Section: Methodsmentioning

confidence: 99%

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Development and Performance Evaluation of a Novel Solar Dryer Integrated with Thermal Energy Storage System for Drying of Agricultural Products

Rulazi,

Marwa,

Kichonge

et al. 2023

ACS Omega

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Passive solar dryers play a crucial role in reducing postharvest losses in fruits and vegetables, especially in regions like sub-Saharan Africa with low electrification rates and limited financial resources. However, the intermittent nature of solar energy presents a significant challenge for these dryers. Passive solar dryers integrated with thermal energy storage (TES) can reduce intermittence and improve the drying efficiency. Currently, phase change materials (PCMs) are popular heat storage materials in dryers, and paraffin wax dominates. The main problem with the use of PCMs is that it is necessary to closely constrain the temperature range of the process during charging and discharging. This can be a difficult condition to meet in simple solar dryers due to the variable availability of solar radiation. Instead, solid-phase materials, such as sand and rocks, are often used. Soapstone is one of the natural rocks with good thermal properties, but it has yet to be used as a TES material in solar dryers for drying agricultural products. Therefore, the main objective of the present study was to develop a novel solar dryer integrated with soapstone as a TES material and evaluate its performance. The proximate analysis to examine the quality of dried products using the developed technology was also carried out. The comparative experiments for the developed dryer were conducted in two modes: dryer with TES materials and without TES materials, and the results were compared with open sun drying (OSD) by drying 50 kg of fresh pineapple and carrot at different times. The drying times for pineapples in the dryer with TES, without TES, and OSD were 13, 24, and 52 h, respectively. However, the drying times for carrots in the dryer with TES, without TES, and OSD were 12, 23, and 50 h, respectively. Notably, the dryer integrated with TES materials could supply heat for around 3–4 h after sunset. The thermal efficiency of the dryer, collector efficiency, and storage efficiency of TES materials were calculated and found to be 45, 43, and 74.5%, respectively. Proximate analysis indicated that the dryer integrated with TES materials effectively maintained the quality of the dried products compared to OSD. Solar dryer integrated with soapstone showed great promise as sustainable and efficient solutions for reducing postharvest losses and enhancing food security in resource-constrained regions like sub-Saharan Africa.

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Section: Resultssupporting

confidence: 92%

Section: Methodsmentioning

confidence: 99%

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Development and Performance Evaluation of a Novel Solar Dryer Integrated with Thermal Energy Storage System for Drying of Agricultural Products

Rulazi,

Marwa,

Kichonge

et al. 2023

ACS Omega

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“…The independent variables affecting measurements were determined by using Equation (2) according to AR and Veeramanipriya (2022).

w_{n} goodbreak= \sqrt{{(W_{instument})}^{2} + {(W_{reading})}^{2}}

…”

Section: Methodsmentioning

confidence: 99%

Techno‐economic analysis of a solar‐assisted heat pump dryer for drying agricultural products

Rulazi,

Marwa,

Kichonge

et al. 2023

Food Science & Nutrition

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Postharvest losses (PHLs) of biomaterials, such as vegetables and fruits, significantly impact food security and economic stability in developing nations. In Tanzania, PHLs are estimated to range between 30% and 40% for cereal crops and even higher for perishable crops such as fruits and vegetables. Open‐sun drying (OSD) is the most extensively employed method because of its affordability and simplicity. However, OSD has several drawbacks, including difficulties in managing drying parameters, long drying times owing to adverse weather, and product contamination. The solar‐assisted heat pump dryer (SAHPD) is a technology designed as an alternative solution for drying biomaterials and reducing PHL. A limited number of SAHPDs have been constructed in developing nations. Most of the works have concentrated on the performance analysis of the systems. This neglects the techno‐economic assessment, which is important to provide both a quantitative and qualitative understanding of the financial viability of the technology. The present study therefore investigates the techno‐economic analysis of a novel SAHPD for drying agricultural products, particularly vegetables and fruits. To determine whether the SAHPD technology is technically and economically viable, tomatoes and carrots were dried and analyzed to determine their thermal and economic performance. The results show that the initial moisture contents of tomatoes (Lycopersicum esculentum) and carrots (Daucus carota) were reduced from 93% and 88% to 10% in 11 and 12 h, respectively. The coefficient of performance (COP), drying time (DT), specific moisture extraction ration (SMER) and thermal efficiency () were found to be 3.4, 2.3 kg/h, 1.33 kg/kWh and 54.0%, respectively. The economic analysis was assessed using the annualized cost, lifecycle savings, and payback period for the dryer's life span of 15 years. The initial investment of the SAHPD was $5221.8 and the annualized cost was $1076.5. The cumulative present worth for 15 years was found to be $23,828.8 and $27,553.1 for tomatoes and carrots, respectively. The payback period for tomatoes was found to be 3 years, whereas for carrots it was 2.6 years. Based on thermal and economic performance assessment results, the developed SAHPD is technically and economically viable to be considered for further investments.

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“…Integration of TEMs with drying units is important to improve the performance of solar dryers. Thermal storage materials are cheap and easy to assemble in remote areas [51][52][53].…”

Section: Introductionmentioning

confidence: 99%

Optimal design of the stand-alone developed hybrid system for producing pure water and drying the plants for remote regions

khalil

Khaira

Abu-Shanab

et al. 2023

Journal of Engineering Research

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The present study aims to develop an innovative hybrid system powered by solar energy to dry plants and produce pure water, suitable for remote regions that suffer from power problems and the problem of lack of pure drinking water. This was done by integrating a two-stage dryer unit with modified solar still with an air injection system and external condenser to dry plants as well as produce pure water. The integration of the modified solar still and external condenser with the two-stage dryer unit aims to increase the rates of pure water productivity, by injecting the hot humid air that leaves the drying unit into the modified solar still. The performance of the developed and innovative hybrid system was studied theoretically, and the mathematical models were validated using the previously published experimental results. The results presented that, the suggested two stages of the dryer with reheating represent an excellent design that improved the mass of water that was removed from the products by 72.65% as compared to only the first stage of the dryer unit. The proposed innovative developed hybrid system can be produced cumulative pure water with a rate reaching 49.94 liter/day, with an improvement of 592.65% as compared to only modified solar still with air injection. Also, the proposed innovative developed hybrid system represents a good choice which improved the gain output ratio by 177.93% on average as compared to only a two-stage dryer unit with reheating.

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Performance evaluation, morphological properties and drying kinetics of untreated Carica Papaya using solar hybrid dryer integrated with heat storage material

Cited by 18 publications

References 45 publications

Development and Performance Evaluation of a Novel Solar Dryer Integrated with Thermal Energy Storage System for Drying of Agricultural Products

Development and Performance Evaluation of a Novel Solar Dryer Integrated with Thermal Energy Storage System for Drying of Agricultural Products

Techno‐economic analysis of a solar‐assisted heat pump dryer for drying agricultural products

Optimal design of the stand-alone developed hybrid system for producing pure water and drying the plants for remote regions

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