Effects of solar drying along with air recycling system on physicochemical and sensory properties of dehydrated pistachio nuts

Mokhtarian, Mohsen; Tavakolipour, Hamid; Ashtari, Ahmad Kalbasi

doi:10.1016/j.lwt.2016.08.056

Cited by 30 publications

(20 citation statements)

References 24 publications

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“…Visual color is measured using a colorimeter Hunter colorimeter (Model: D25 LT, Hunterlab, USA) as earlier described by Nayak, Mohan, and Radhakrishnan () for mustard green. Total color differences (Δ E ;Equation ) is utilized to analyze the change in varied characteristics of color (Mokhtarian, Tavakolipour, & Kalbasi Ashtari, ).

normalΔ E = \sqrt{{(Δ L^{*})}^{2} + {(Δ a^{*})}^{2} + {(Δ b^{*})}^{2}}

…”

Section: Methodsmentioning

confidence: 99%

Performance comparison of mixed mode and indirect mode parallel flow forced convection solar driers for drying Curcuma zedoaria

Lakshmi

Muthukumar

Ekka

et al. 2019

J Food Process Engineering

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This study focuses on energy and drying kinetic analyses of Curcuma zedoaria (white turmeric) dried in mixed and indirect active parallel flow solar dryers. Dryer efficiency, specific energy consumption and drying rate are studied. The overall dryer efficiency of mixed mode (MFSCD) is 26.5% higher than indirect mode (IFSCD) solar dryer. Two term model and Verma model fit best for Curcuma zedoaria drying in MFSCD and IFSCD, respectively, and Logarithmic model is quite suitable for open sun drying (OSD). The effective moisture diffusivity of the product dried under MFSCD is highest as compared to IFSCD and OSD products. The quality analyses show that higher values of TFC (78.11 mg GAE/g of sample) and DPPH (120.56 μ mol of TE/g of sample) are reported in the samples dried in MFSCD as compared to IFSCD and OSD samples. Practical applications Conventional open sun drying is a common practice followed by small farmers for drying herbs and spices. Products dried under open sun lose their nutritional and medicinal values due to slow drying rate and improper heating. The present work focusses on the development of a low cost solar dryer for drying of high value medicinal herbs like Curcuma zedoaria, curcuma caesia, and black cardamom. Study of drying kinetics helps in improving the design aspects of solar dryer and optimization of the drying systems. Drying time of the Curcuma zedoaria dried in the developed dryer is about 60% less than the open sun drying and the retention of color, antioxidant, and texture of the solar dried products is excellent. The developed solar dryer will be suitable for small small‐scale farmers and can be scaled up to any size.

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normalΔ E = \sqrt{{(Δ L^{*})}^{2} + {(Δ a^{*})}^{2} + {(Δ b^{*})}^{2}}

…”

Section: Methodsmentioning

confidence: 99%

Performance comparison of mixed mode and indirect mode parallel flow forced convection solar driers for drying Curcuma zedoaria

Lakshmi

Muthukumar

Ekka

et al. 2019

J Food Process Engineering

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“…In addition, drying air recirculation has been found to be an effective mean of reducing the effects of solar energy intermittency for the drying of some crops when using solar dryers. Mokhtarian et al [51] investigated the effects of drying air recirculation on the drying rates and quality of pistachio nuts. Drying was performed under shade, sun drying, solar drying, and recirculation solar drying.…”

Section: Hybrid Dryingmentioning

confidence: 99%

“…Solar dryer with air recirculation pistachio nuts Air recirculation produces better product quality; Drying time is reduced by 19%. [51] Heat recovery from a hybrid solar-biomass convective dryer…”

Section: Okra Groundnut and Yam Chipsmentioning

confidence: 99%

Recent advances in sustainable drying of agricultural produce: A review

et al. 2019

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Quests for sustainability, food security and need to decouple food prices from fluctuating prices of finite fossil fuels are the drivers to sustainable processing and storage of agricultural products.Farming predominantly takes place in rural areas where conventional energy technologies may either be expensive or sometimes technically infeasible to be obtained. This necessitates deployments of renewable energy technologies to remote areas for sustainable power generation, cooling and drying of agricultural product. Renewable systems e.g. solar dryers, solar hybrid dryers, combined power and drying system take leading roles in sustainable drying of farm produce. A number of research studies have been carried out in the past one decade, which mainly concentrate on modelling, simulation and experiment of different sustainable drying techniques. Therefore, this paper mainly aims to present a state of the art review on the contributions of combined power and drying, application of phase change materials and hybrid drying systems with regard to agricultural products. Based on this comprehensive summarization, it is indicated that deployment of biomass powered combined heat and power systems might be a good solution to post-harvest wastes since both electricity and heat for drying of agricultural products can be simultaneously obtained.

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“…Drying kinetics is used to show removal of moisture from products, and it has to do with process variables, and hence, a better understanding of drying rate will help in developing a drying rate model. Various experimental studies were carried out by researchers across the globe on drying kinetics show-casing of numerous leafy samples, fruits, and vegetables like broccoli (Kumar et al, 2017;Sarsavadia et al, 1999), red pepper (Doymaz & Pala, 2002), black tea (Panchariya et al, 2002), apricot (Toğrul & Pehlivan, 2002), carrot (Doymaz, 2004), eggplant (Ertekin & Yaldiz, 2004), turmeric in solar conduction dryer (Borah et al, 2017), ghost chilli in an indirect forced convection solar dryer (Rabha et al, 2017), black turmeric in forced convection solar dyer (Kondareddy et al, 2019), star fruit in solar tunnel dryer (Kondareddy et al, 2020), pistachio nuts in solar dryer (Mokhtarian et al, 2017), and red chilli in double pass solar dryer (Banout et al, 2011). It was observed from the literature review that there is a dearth of literature on the drying behavior of blood fruit.…”

Section: Introductionmentioning

confidence: 99%

Performance evaluation and economic analysis of modified solar dryer with thermal energy storage for drying of blood fruit ( Haematocarpus validus )

Kondareddy

Sivakumaran

Krishnan

et al. 2021

J. Food Process. Preserv.

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Abbreviations: h c , convective heat transfer coefficient (W/m 2 K); C pb , cost payback period per year; C sa , cost saved per day per year; C sp , extra cost spends per year; C v , air volume heat capacity (J/kg K); EN pb , Environmental payback period per day; E cd , energy consumed per day; Em CO 2 , CO 2 Emitted per day; E pb , energy payback period per day; E sav , energy saved per day; Re CO 2 , CO 2 restricted per day; A, area (m 2 ); Ex, exergy (kw); F, mass flow rate of dry air (kg/s); H, humidity (%); IMC, initial moisture content; M, moisture content; MR, moisture ratio (%); N, total number of values; PCM, phase changing material; PV, photo voltaic; T, temperature (°C); W, weight (g); a, ambient; avg, average; b, base plate; ca, circulating air; d, dryer chamber; e, experimental value; eff, Efficiency; f , dry air; g1, glaze glass (upper glass); g2, glaze glass (inner glass); in, inner; out, outer; p, primary collector; p ′ , product drying; pre, predicted value; pw, paraffin wax; s, simulation value; su, storage unit; wet, wet sample; , length of collector m; , thickness m; , density of dry air kg/m 2 .

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Effects of solar drying along with air recycling system on physicochemical and sensory properties of dehydrated pistachio nuts

Cited by 30 publications

References 24 publications

Performance comparison of mixed mode and indirect mode parallel flow forced convection solar driers for drying Curcuma zedoaria

Performance comparison of mixed mode and indirect mode parallel flow forced convection solar driers for drying Curcuma zedoaria

Recent advances in sustainable drying of agricultural produce: A review

Performance evaluation and economic analysis of modified solar dryer with thermal energy storage for drying of blood fruit ( Haematocarpus validus )

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