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Journal articles on the topic 'Solar-air drying mode'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

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1

SHUBHAM, MHATRE, VAGHELA ATULKUMAR, MAHESHWARI JITESH, and SURYAWANSHI PRATHAMESH. "Mixed Mode Solar Dryer." International Journal of Innovative Science and Research Technology 7, no. 5 (2022): 699–700. https://doi.org/10.5281/zenodo.6618398.

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Mixed mode solar dryer composed of solar collector and a drying chamber. The flat plate collector is the most extensively used solar collector for domestical and business motive because it is easy and portable format and required lots much less maintenance. The drying device uses most effective solar energy. The air allowed in through air inlet is heated up inside the solar collector channeled through the drying chamber wherein it is implemented in drying and removing the moisture content from the agriculture product. This paper gives a format of mixed mode dryer for drying products records we

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Vikas, L., H. S. Ravikumar Patil, Shivabasappa Kandkur, V. M. Vyshali, and Rajashree G. Mavinkurve. "Applications of solar energy for drying of agricultural commodities." INTERNATIONAL JOURNAL OF AGRICULTURAL SCIENCES 18, no. 2 (2022): 856–63. http://dx.doi.org/10.15740/has/ijas/18.2/856-863.

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Drying is a simultaneous heat and mass transfer energy intensive operation, widely used as a food preservation technique. In view of improper postharvest methods, energy constraint and environmental impact of conventional drying methods, solar drying could be a practical, economical and environmentally reliable alternative. Open air solar drying method is used frequently to dry the agricultural products. But this method has some disadvantages. Therefore, to avoid disadvantages it is necessary to use the other solar drying methods. Different solar drying methods are direct solar drying, indirec

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3

Chuatrakool, Wannarat, Siva Achariyaviriya, Aree Achariyaviriya, and James C. Moran. "Development of a biomass energy dryer assisted with solar energy for farmers in off-grid communities." E3S Web of Conferences 187 (2020): 03004. http://dx.doi.org/10.1051/e3sconf/202018703004.

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The objectives of this research are to design and construct a biomass energy dryer assisted with solar energy for farmers in off-grid communities and to evaluate the performance of the dryer. The dryer consists of a boiler, drying chamber and solar panels. A compressed sponge was used as a drying product. The air temperature distribution and product moisture uniformity inside the drying chamber were measured. The apparatus was tested in three energy modes, solar energy mode, biomass energy mode and biomass/solar energy assisted mode. Drying using biomass/solar energy assisted mode gave a bette

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Krishna, M. Jaya, V. Ravi Teja, M. Deepthi, Ch Ganesh, and R. Lokesh. "A Comparison of Open Sun Drying Using Tomatoes and Mixed Mode Type Solar Drying." Journal of Modern Thermodynamics in Mechanical System 4, no. 3 (2022): 16–25. http://dx.doi.org/10.46610/jmtms.2022.v04i03.003.

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Ingredients utilized in many culinary products, such as dried tomatoes used to make tomato powder and also used in sandwiches, are made via solar drying. When compared to damp products, dried items are more expensive. Used in various sectors, such as drying floor mats, in addition to drying food goods. Compared to drying in the open sun, solar drying produces superior outcomes. We also examine the temperature change and moisture decrease rate between solar drying and open sun drying. Solar drying was created to address some drawbacks, including dust, unpredictable temperature, and pollution. I

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Agbonkhese, K& Okojie G. "Performance Analysis of Mixed-Mode Solar Dryer for Drying Vegetables." Journal of Science and Technology Research 5, no. 3 (2023): 137–43. https://doi.org/10.5281/zenodo.8313086.

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<em>This work presents the design, fabrication and performance analysis of mixed-mode solar dryer for vegetables. In the dryer, the heated air from a separate solar collector will pass through a grain bed and at the same time, the drying cabinet absorbs solar energy directly through the transparent walls and roof. The main components of the dryer are the solar collector (air heated), the drying, cabinets, drying trays. The results obtained during the analysis period shown that dryer and the solar collector was higher than the average ambient temperature during most hours of the day light. The

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Simate, Isaac N. "Air Flow Model for Mixed-Mode and Indirect-Mode Natural Convection Solar Drying of Maize." Energy and Environment Research 10, no. 2 (2020): 1. http://dx.doi.org/10.5539/eer.v10n2p1.

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An air flow model for mixed-mode and indirect-mode natural convection solar drying of maize to help understand the factors that influence air flow in the dryer is presented. Temperatures at various sections of the dryer obtained from drying experiments were input to the air flow model to predict the respective thermal buoyancies. The air flow rate was determined by balancing the sum of the buoyancy pressures with the sum of the flow resistances in the various sections of the dryer. To validate the model, the predicted air flow was compared with measured air flow from experiments. For both the

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D Pagukuman, B. Norerama, Mohd Kamel Wan Ibrahim, and Muhamad Aiman Mat Roni. "Semi empirical modelling for thin sliced potato drying under active-mode indirect solar dryer." E3S Web of Conferences 516 (2024): 01001. http://dx.doi.org/10.1051/e3sconf/202451601001.

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This paper aims to select the best semi-empirical model for thinly sliced potato drying under active mode indirect solar dryer with variations of the exhaust air velocities. The exhaust air velocities to remove the vaporized moisture inside the drying chamber were set at 0.2m/s, 0.4m/s, 0.6m/s, and 0.8m/s. The solar intensity, temperature and relative humidity were measured. The Sigmaplot software was used to select the best thin layer drying model for sliced potatoes drying under indirect solar dryer assisted with a solar accumulator and exhaust fan. From the result, drying at 0.2m/s shows a

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Harikrishnan, P. V. *. Richu Zachariah. "COMPUTATIONAL STUDIES ON PERFORMANCE OF A MIXED MODE SOLAR DRYER WITH THERMAL STORAGE." INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY 5, no. 7 (2016): 235–43. https://doi.org/10.5281/zenodo.56953.

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This paper presents a computational analysis to investigate the performance of a mixed mode solar dryer with thermal energy storage. The dryer incorporates a flat plate solar collector, a greenhouse, packed bed phase change energy storage and drying plenum with crop trays. Here drying is happening within the solar greenhouse. Solar air heater preheats the air that goes through the agro crops kept in trays within the greenhouse. This will increase the drying rate. The drying system works in such a fashion that phase transition material stores the thermal energy throughout sunshine hours and rel

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9

Alkahdery, L. A. "PERFORMANCE IMPROVEMENTOF SOLAR DRYER USINGAN AUXILIARY HEAT SOURCE UNDER DIFFERENT VALUES OF AIRFLOW RATES." Eurasian Physical Technical Journal 20, no. 1(43) (2023): 42–50. http://dx.doi.org/10.31489/2023no1/42-50.

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One of the most crucial methods for preserving agricultural produce is solar drying. The major focus of this paper is increasing solar drying systems' effectiveness. The development of new methods and variables that may have an impact on the functionality of solar dryers aids in enhancing their efficiency. An indirect-type solar dryer for drying agricultural products is proposed and developed in this study. A dryer consisting of a solar flat plate air collector, an insulated drying chamber, an auxiliary (electric) heat source, and an electric fan is constructed to improve the dryer's performan

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Hu, Yanjun, Shanshan Liu, Klein Ileleji, Yan Mi, and Long Han. "Design and 3-D simulation of a mixed mode solar barn drier for drying wastewater sewage sludge." Thermal Science 22, Suppl. 2 (2018): 419–27. http://dx.doi.org/10.2298/tsci170830254h.

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The paper presents a preliminarily study on an efficient, inexpensive and energy saving solar batch dryer for drying sludge. A concept of a mixed mode solar dryer was developed and designed. Air heated by the solar flat heater was forced through drying chamber by electric fans. A 3-D physical model was used to observe and predict the operation of the solar batch dryer at different time under designed conditions. The thermal performance and air movement of drying chamber in the designed dryer unit were evaluated through ANSYS-FLUENT software. By determining the external conditions, localization

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Clement, A. Komolafe, E. Essoun Edward, Abaidoo David, K. Amissah Patrick, and J. Komolafe Omotola. "Thermo-Kinetics of The Sun Drying of Plantain Slices Under Forced Convections and Open Air Conditions." Engineering and Technology Journal 10, no. 05 (2025): 4834–46. https://doi.org/10.5281/zenodo.15342669.

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The thermo kinetics of the sun drying of plantain slices integrated with the granite sensible thermal energy storage material (GSTESM) were investigated. Fifteen (15) thin layer drying models were adopted to model the drying curves following standard criteria for fitness. The moisture content of plantain slices took 1140 minutes for both open air and solar drying system with plywood drying chamber to reduce from 61.5% to 6.83 and 7.34% w.b. respectively, while it took the solar drying system with Perspex glass chamber 1080 minutes to reduce the same initial moisture content of plantain slices

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Chouikhi, Houssam, and Baher M. A. Amer. "Performance Evaluation of an Indirect-Mode Forced Convection Solar Dryer Equipped with a PV/T Air Collector for Drying Tomato Slices." Sustainability 15, no. 6 (2023): 5070. http://dx.doi.org/10.3390/su15065070.

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This paper proposes an indirect-mode forced convection solar dryer equipped with a PV/T air collector. The PV/T air collector generates both heated air and electrical energy, which are used to force convection in the solar dryer. Experiments were carried out on selected tomato slices for which the temperature and humidity readings as well as the masses of the dried samples were instantaneously recorded for two days. A thermal analysis was performed on the solar drying system to investigate its performance. The PV/T dryer’s air temperature and velocity simulation using CFD modeling were validat

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Gautam, Jitendra Kumar, and Pankaj Verma. "Review Paper on Diffierent Types of Solar Dryer." International Journal for Research in Applied Science and Engineering Technology 12, no. 7 (2024): 250–57. http://dx.doi.org/10.22214/ijraset.2024.63559.

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Abstract: One of the most appealing and economical uses of solar energy is drying agricultural goods. With differing degrees of technical performance, a multitude of solar dryer types have been devised and developed across the globe. In general, solar dryers come in four different varieties: (1) direct solar dryers, (2) indirect solar dryers, (3) mixed-mode dryers, and (4) hybrid solar dryers. The product being dried, as well as technical and financial concerns, are reviewed in this paper together with other solar dryer kinds. Technically speaking, integrated storage, high efficiency, compact

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Hu, Zhongting, Sheng Zhang, Wenfeng Chu, Wei He, Cairui Yu, and Hancheng Yu. "Numerical Analysis and Preliminary Experiment of a Solar Assisted Heat Pump Drying System for Chinese Wolfberry." Energies 13, no. 17 (2020): 4306. http://dx.doi.org/10.3390/en13174306.

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The present work investigated a solar assisted heat pump system for drying Chinese wolfberry. The kinetic characteristic was firstly analyzed through a series of lab experiments. It was concluded that the Page model was the most suitable for predicting the heat and mass transfer of the wolfberry. Based on the wolfberry kinetic model, solar collector model and chamber air model, the coupled drying system model was developed. The accuracy of the mathematic model was determined through comparing with the preliminary experimental results. The influence of operating conditions on the thermal and en

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Agrawal, Sanjay, Trapti Varshney, and Jitendra Kumar. "Comparative Analysis of Hybrid Photovoltaic Thermal (PV/T) Solar Dryer." Asian Journal of Water, Environment and Pollution 20, no. 1 (2023): 57–66. http://dx.doi.org/10.3233/ajw230009.

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As the world’s population is increasing, the demand for food is also increasing. Drying techniques increase the life and quality of crop and industrial food products. It also improves the economic condition of farmers. Drying reduces the water stored within the product by evaporation. It can be done by the use of conventional energy and different methods. Sun radiation is used for open sun drying around the globe. Open sun drying has many disadvantages in comparison to other drying techniques. Solar drying is comparatively clean and effective. Solar dryers are of mainly four types: 1) direct s

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Srisittipokakun, Nattapon, and Keerati Kirdsiri. "Drying Pineapple Using a Mix Mode Solar Dryer." Advanced Materials Research 979 (June 2014): 11–15. http://dx.doi.org/10.4028/www.scientific.net/amr.979.11.

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Pineapple was dried using a mix mode solar dryer developed in the Faculty of Science and Technology, Nakhon Pathom Rajabhat University, Nakhon Pathom, Thailand. The dryer was designed for small-scale commercial producers of agricultural products in non-electrified locations. The products to be dried are placed in multilayer on a wire mesh in the drying tunnel to receive energy from both hot air supplied from the collector and incident solar radiation on products. It is constructed in local materials then tested experimentally in food stuffs drying pineapple. With this dryer, 40 kg of pineapple

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17

Sattorov, Bobonazar, Khairulla Davlonov, Bobir Toshmamatov, and Bakhrom Arziev. "Increasing energy efficiency combined device solar dryer-water heater with heat accumulator." BIO Web of Conferences 71 (2023): 02024. http://dx.doi.org/10.1051/bioconf/20237102024.

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In the article, the authors proposed a combined device of a solar dryer-water heater with a heat accumulator (CDSDWHHA) for drying agricultural products using solar energy. As a research object - a connected device of a solar dryer-water heater with a heat accumulator, a drying drum installation, and an additional combined solar water-air heating collector for simultaneous heating of water and air was installed. Drying agricultural products is a technological process that requires a large consumption of thermal energy and fuel-energy resources. The results of the conducted analysis showed that

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Minaei, Saeid, Ali Motevali, Barat Ghobadian, Ahmad Banakar, and Seyed Hashem Samadi. "An Investigation of Energy Consumption, Solar Fraction and Hybrid Photovoltaic–Thermal Solar Dryer Parameters in Drying of Chamomile Flower." International Journal of Food Engineering 10, no. 4 (2014): 697–711. http://dx.doi.org/10.1515/ijfe-2014-0135.

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Abstract In this research, drying of a medicinal plant (chamomile) in a hybrid photovoltaic–thermal solar dryer with and without heat pump was investigated. The experiments were performed at three air speeds (0.5, 1, and 1.5 m/s), three levels of air temperature (40, 50, and 60°C), with and without using a heat pump. Results of analysis indicated that adding a heat pump to the photovoltaic solar dryer decreases drying time, energy consumption, and required specific energy. Solar energy fraction increased with decreasing air temperature and velocity. Analysis of the dryer-related parameters sho

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Toirov, Zuvr, and Shahzod Beshim ugli Tukhtaev. "POSSIBILITIES OF USING SOLAR ENERGY FOR DRYING FRUITS AND GRAPES IN CLIMATE CONDITIONS OF UZBEKISTAN." EURASIAN JOURNAL OF ACADEMIC RESEARCH 1, no. 3 (2021): 675–80. https://doi.org/10.5281/zenodo.5059741.

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This article, based on data from the Uzbek Hydrometeorological Center for the last 10 years, identifies the ripening times of fruits and grapes in the Tashkent and Bukhara regions, the amount of solar energy during the drying season, monitoring of sunny days, temperature and relative humidity. The obtained data can be used in the design of solar-air dryers.

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Paudel, Siddhartha, and Bibek Dhungana. "Design, Fabrication and Performance Evaluation of Mixed-Mode Solar Tunnel Dryer for Buffalo Meat by Forced Convection." Himalayan Journal of Applied Science and Engineering 4, no. 1 (2023): 43–51. http://dx.doi.org/10.3126/hijase.v4i1.56869.

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In the context of Nepal, the consumption, as well as preservation of meat products, has been in practice for ages. The primitive approach - open sun drying technique- a technique for preserving meat for longer, can contaminate the meat. In addition, the meat in direct contact with UV rays also degrades the quality of meat which may not be suitable for consumption. Exposing the meat to the open air causes the evaporation of its moisture, leading to a decline in flavour and an extended duration for the dehydration of the meat product. The alternative technique - mixed mode solar tunnel dryer - i

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Srithanyakorn, Siwakorn, Sungwan Bunchan, Bundit Krittacom, and Ratinun Luampon. "Comparison of mixed-mode forced-convection solar dryer with and without stainless wire mesh in solar collector." Clean Energy 7, no. 6 (2023): 1316–29. http://dx.doi.org/10.1093/ce/zkad058.

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Abstract A mixed-mode forced-convection solar dryer (MMFCSD) is a device that utilizes both direct and indirect solar energy. The solar collector, which stores thermal energy for indirect solar uses, is an essential component of the dryer. Unfortunately, the thermal efficiency of this device is generally low. In this study, a technique was employed to improve the heat transfer of the solar collector in a MMFCSD. The technique involved adjusting the air flow pattern into a swirling flow to disturb the thermal boundary layer on the absorber plate under forced convection by using stainless wire m

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Husainy, Avesahemad S. N., Sunil Pujari, and Gouri Wale. "Experimental Investigation of Mixed Mode Forced Convection Solar Dryer for Turmeric (Curcuma Longa)." Asian Review of Mechanical Engineering 7, no. 1 (2018): 1–6. http://dx.doi.org/10.51983/arme-2018.7.1.2443.

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This paper presents an experimental effort on forced convection mixed mode solar dryer for turmeric at Miraj, India (16.83°N 74.63°E). To study the effect of drying time on mixed mode type forced convection solar dryer, 15kg of good quality of boiled turmeric are loaded. It has been experimentally analyzed that drying time can be reduced up to 7 days as compared to a conventional method which requires 13 – 15 days. The experiment was conducted in February month in Miraj, Maharashtra having incident solar radiation and wind speed 5.12 W/m2/day and 5 km/hr respectively. The drying experiment con

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Sikarwar, Nitin, and Amit Agrawal. "Experimental Investigation and Performance Analysis of a Solar Dryer Using Advanced Heat Transfer Materials." International Journal for Research in Applied Science and Engineering Technology 11, no. 6 (2023): 4754–65. http://dx.doi.org/10.22214/ijraset.2023.54530.

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Abstract: This thesis evaluates the performance of a mixed-mode solar dryer with a backup heater. This thesis compares the solar dryer alone with the solar dryer with backup heater in terms of drying rate, efficiency, and drying time. The primary collector, the secondary collector on the roof, three drying trays within a drying chamber, and the chimney make up the dryer. A single pass twin duct air heating system and an aluminium plate that has been coated black make up the primary collector. The drying chamber's top secondary collector and side walls are constructed of clear glass. The drying

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Jogunuri, Sravankumar, Navneet kumar, Farid Gayasoddin Sayyad, Valand Pinakin, and Vishal Patel. "PERFORMANCE EVALUATION OF MULTI-PURPOSE MIXED-MODE CABINET SOLAR FOOD PROCESSOR(MCSFP)." Current Agriculture Research Journal 5, no. 3 (2017): 404–13. http://dx.doi.org/10.12944/carj.5.3.21.

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A Multi-Purpose Solar Food Processor (MCSFP) was developed to carryout both cooking and drying operations simultaneously. MCSFP was tested in three different modes of operations ie., for fenugreek leaves drying (M1) and for cooking of rice separately (M2) and drying of fenugreek and cooking of rice together(M3). The maximum temperature difference attained between ambient air and MCSFP dryer and cooker was 23°C and 36.5°C respectively. The temperatures attained are well suited for drying of fenugreek leaves and cooking rice.

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Habtay, Gedion, Maytham A. Al-Neama, Janos Buzas, and Istvan Farkas. "Experimental Performance of Solar Air Heaters for Drying Applications." European Journal of Energy Research 1, no. 5 (2021): 4–10. http://dx.doi.org/10.24018/ejenergy.2021.1.5.29.

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This paper presents the results of an experimental investigation on an indirect active type of solar dryer, using two distinct solar air collector and their impacts on drying agricultural products. The thermal performance of the proposed collectors has been evaluated using the first and second laws of thermodynamics. Experimental observations were done in climatic conditions Gödöllő, Hungary on the 2nd and 9th of October 2017. The experiments were also carried out to dry 2 kg of sliced apples spread over the drying trays. The mas flow rate of air was maintained as 0.038 kg/s and the dryer was

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Johannes, P. Angula, and Inambao Freddie. "Modelling and CFD Simulation of Temperature and Airflow Distribution Inside a Forced Convection Mixed-Mode Solar Grain Dryer with a Preheater." International Journal of Innovative Technology and Exploring Engineering (IJITEE) 10, no. 4 (2021): 33–40. https://doi.org/10.35940/ijitee.B8282.0210421.

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In this study, a 3D Computational Fluid Dynamics (CFD) model was developed to simulate the drying process of maize ears/cobs in a mixed-mode solar grain dryer. The dryer system is aimed to operate under forced convection and is integrated with a preheater to heat air prior to entering the solar collector. The 3D model was developed with great accuracy using SolidWorks software and the CFD simulation was carried out using ANSYS Fluent software. The study was aimed at analyzing and predicting temperature and airflow distribution in the mixed-mode solar dryer system. The CFD simulation was conduc

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Angula, Johannes P., and Freddie Inambao. "Modelling and CFD Simulation of Temperature and Airflow Distribution Inside a Forced Convection Mixed-Mode Solar Grain Dryer with a Preheater." International Journal of Innovative Technology and Exploring Engineering 10, no. 4 (2021): 33–40. http://dx.doi.org/10.35940/ijitee.b8282.0210421.

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In this study, a 3D Computational Fluid Dynamics (CFD) model was developed to simulate the drying process of maize ears/cobs in a mixed-mode solar grain dryer. The dryer system is aimed to operate under forced convection and is integrated with a preheater to heat air prior to entering the solar collector. The 3D model was developed with great accuracy using SolidWorks software and the CFD simulation was carried out using ANSYS Fluent software. The study was aimed at analyzing and predicting temperature and airflow distribution in the mixed-mode solar dryer system. The CFD simulation was conduc

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Samuel, Ayobami Adeyemi, Olarewaju Obayopo Surajudeen, and Akharume Felix. "Numerical simulation and experimental validation study of a mixed-mode solar dryer for cocoa beans." Journal of Postharvest Technology 07, no. 3 (2019): 96–114. https://doi.org/10.5281/zenodo.3698248.

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Performance of a mixed-mode solar dryer prototype for cocoa beans was optimized by geometrical optimization of the dryer using numerical simulation. A mixed mode solar dryer was modelled, numerically simulated using computational fluid dynamic (CFD), and the thermal performance of the modelled dryer was experimentally validated for a 50 kg thin layer mass configuration of cocoa beans under no load condition. The simulation parameters include drying chamber cross-sectional area, drying chamber height, drying tray (plenum) position, collector inclination angle as well as velocity of air flow. Th

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Srisittipokakun, Nattapon, and Keerati Kirdsiri. "Experimental Performance of a Mix Mode Solar Dryer for Drying Centella Asiatica." Advanced Materials Research 770 (September 2013): 80–83. http://dx.doi.org/10.4028/www.scientific.net/amr.770.80.

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This paper describes a mixed mode natural convection of solar dryer. The dryer was designed for small-scale commercial producers of agricultural products in non-electrified locations. The products to be dried are placed in multi layer on a wire mesh in the drying tunnel to receive energy from both hot air supplied from the collector and incident solar radiation on products. Temperatures in the drying chamber varied from 28.0° C to 55.0° C depend on the weather conditions. To investigate its performance, the dryer was used to dry 30 kg of Centella asiatica in December 2012. The dryer could be u

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Tawfik, M. A., Khaled M. Oweda, M. K. Abd El-Wahab, and W. E. Abd Allah. "A New Mode of a Natural Convection Solar Greenhouse Dryer for Domestic Usage: Performance Assessment for Grape Drying." Agriculture 13, no. 5 (2023): 1046. http://dx.doi.org/10.3390/agriculture13051046.

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It is known that the natural convection (NC) solar drying process is a simple and cheap method for drying foodstuffs, but it is not preferable for common users in the case of drying high-moisture content agro-products due to the slow rate of drying. Meanwhile, the forced convection (FC) drying process is most appropriate for such products, but its economic feasibility may be affected due to high initial and maintenance costs. Therefore, the present study proposed a controlled natural convection (CNC) drying mode using a solar greenhouse dryer (SGD) for drying grapes with two types of cover mat

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Embiale, Dessie Tadele, Dawit Gudeta Gunjo, Chandraprabu Venktachalam, and Mohanram Parthiban. "Experimental investigation and exergy and energy analysis of a forced convection solar fish dryer integrated with thermal energy storage." AIMS Energy 10, no. 3 (2022): 412–33. http://dx.doi.org/10.3934/energy.2022021.

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<abstract> <p>Drying is an effective means of reducing post-harvest losses which increases the shelf life of products by reducing their moisture content to a safe storage level. An indirect mode forced convection solar dryer integrated with thermal energy storage was designed, developed and experimentally tested by drying fish. The components of the dryer are a double pass solar air heater, a paraffin wax-based shell and tube for latent heat thermal energy storage, a drying chamber and a blower. A maximum temperature of 69 ℃ was obtained at the outlet of the solar air heater, and t

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Xie, Zhiyuan, Yulie Gong, Cantao Ye, Yuan Yao, and Yubin Liu. "Numerical Analysis and Optimization of Solar-Assited Heat Pump Drying System with Waste Heat Recovery Based on TRNSYS." Processes 9, no. 7 (2021): 1118. http://dx.doi.org/10.3390/pr9071118.

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In this paper, a new solar-assisted heat pump drying system with waste heat recovery and double water tanks (SCAHP) was established and the system optimized by TRNSYS and variable air volume experiment. The annual cumulative efficiency of the SCAHP (COPac), buffer tank heating efficiency (ηBT) and hot water storage tank heating efficiency (ηST) are all considered as optimization objectives, and this paper discusses the relationship between the three optimization objectives and studies the influence of hot air volume (qDR), area of solar collector (ASC), inclination angle of solar collector (IS

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Elwakeel, Abdallah Elshawadfy, Edwin Villagran, Jader Rodriguez, Cruz Ernesto Aguilar, and Atef Fathy Ahmed. "Development, Thermodynamic Evaluation, and Economic Analysis of a PVT-Based Automated Indirect Solar Dryer for Date Fruits." Sustainability 17, no. 10 (2025): 4571. https://doi.org/10.3390/su17104571.

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The present study focuses on the development, thermodynamic evaluation, and economic analysis of a photovoltaic-thermal (PVT)-based automated mixed-mode indirect solar dryer (AMMISD). The developed AMMISD was used for drying five date varieties native to the Aswan area, namely Shamia, Bartamuda, Sakkoti, Malkabii, and Gondaila. The initial and final moisture contents of date varieties ranged between 15.7% and 17.2% and 4.91% and 6.41%, respectively. All date fruit varieties reached equilibrium moisture content after 6 days (60 h) compared with 14 days (140 h) in a traditional indirect solar dr

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Álvarez-Sánchez, Francisco, Jassón Flores-Prieto, and Octavio García-Valladares. "Annual Thermal Performance of an Industrial Hybrid Direct–Indirect Solar Air Heating System for Drying Applications in Morelos-México." Energies 14, no. 17 (2021): 5417. http://dx.doi.org/10.3390/en14175417.

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A theoretical–experimental annual analysis of a hybrid industrial direct–indirect solar air heating system performance for drying was conducted considering temperatures, useful energy Qu, efficiency η, and solar fraction SF. The direct solar air heating system located in Morelos, México, has flat-plate solar air collectors, and the indirect system has flat-plate solar water collectors, a thermal storage tank, a cross-flow fin, and a tube heat exchanger. A validated TRNSYS program modeled the process; the validation was carried out by comparing each component outlet temperature and useful energ

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Radhakrishnan, Ganesh, Teodora Odett Breaz, Al Waleed Ahmed Al Mahrouqi, et al. "A Comparative Management Analysis on the Performance of Different Solar Drying Methods for Drying Vegetables and Fruits." Sustainability 16, no. 2 (2024): 775. http://dx.doi.org/10.3390/su16020775.

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Drying is the process of moisture removal which is applied to many foodstuffs including fruits and vegetables for preservation and storage purposes. Since solar energy is one type of environmentally friendly renewable energy, open-type solar dryers, natural convective type solar dryers and greenhouse type solar dryers were designed and fabricated in this study for the preservation of fruits and vegetables. A comparative study among various solar drying methods was performed to study the drying performance by maintaining the quality and texture of the dried foodstuffs. Factors such as solar rad

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Gyawali, Manoj, Ayusha Acharya, Tikaram Adhikari, et al. "A mixed-mode ginger and turmeric solar dryer: design, simulation, biochemical and performance analysis." BIBECHANA 19, no. 1-2 (2022): 40–60. http://dx.doi.org/10.3126/bibechana.v19i1-2.46386.

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Postharvest loss of vegetables and fruits is higher in developing countries due to the lack of post-processing equipment. Although the production of ginger and turmeric is high in Nepal, farmers practices open sun drying, which leads to poor quality, and the products do not get to the market at reasonable prices. In this study, a simple, easy to assemble and disassemble mixed-mode solar dryer has been designed, fabricated, and biochemical and performance analyses were done. The dryer was designed considering the solar irradiation, sunshine hours, latitude of the location, locally available mat

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Simate, Isaac N. "Energy and Exergy Analysis of an Indirect-Mode Natural Convection Solar Dryer for Maize." Energy and Environment Research 11, no. 2 (2021): 19. http://dx.doi.org/10.5539/eer.v11n2p19.

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The energy and exergy analysis of an indirect-mode natural convection solar dryer for maize grain is presented. Two different sizes of maize grain bed depths of 0.04 m and 0.02 m translating into grain loads of 10 kg and 5 kg respectively, are used in the study to determine their effects on the collector energy and exergy efficiencies and the drying chamber exergy efficiency. Experiments were carried out using an indirect-mode laboratory solar dryer under a solar simulator with a radiation setting of 634.78 W/m2. The analysis gave average collector energy efficiencies of 33.3 % and 46.2 % for

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Karimu, Abdulai, Adul-Razak Osman, Ayariga Clement, and Iddrisu Yahaya. "Design and Construction of a Mixed-Mode Natural Convection Solar Dryer for Mango Slices." International Journal of Irrigation and Agricultural Development (IJIRAD) 8, no. 1 (2024): 364–72. http://dx.doi.org/10.47762/2024.964x.127.

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Fruits like mangoes are produced in large quantities during the peak season, and high postharvest losses occur due to lack of appropriate storage and handling structures. The main goal of this study was to design and construct a mixed-mode natural convection (MMNC) solar dryer for drying of mango slices. The dryer was designed using AutoCAD and constructed with wood and glass using basic woodworking tools and processes. The developed dryer has a direct collector, a vertical collector, and an indirect collector. The drying chamber has two removable frames with 5 shelves each, a total drying are

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Mukanema, Maona, and Isaac N. Simate. "Energy, Exergy and Economic Analysis of a Mixed-mode Natural Convection Solar Tunnel Dryer for Banana Slices." Energy and Environment Research 14, no. 1 (2024): 1. http://dx.doi.org/10.5539/eer.v14n1p1.

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The energy, exergy and economic analysis of a mixed-mode natural convection solar tunnel dryer for drying banana slices is presented. The collector, drying chamber and chimney energy and exergy are analysed for a load of 3.75 kg of fresh banana slices. Further, the economic analysis in terms of Net Present Value (NPV), Profitability Index (PI), the Payback Period (PB) and the Discounted Payback Period are presented. Drying experiments were done in a period of two days. During the experiment, solar radiation varied from 206.1 W/m2 to 934.5 W/m2; drying chamber temperature varied from 51.7&o

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Dina, Sari Farah, and Harry P. Limbong. "Performa Pengeringan Kontinyu dan Terputus Pada Biji Kakao Fermentasi dengan Metode Pengeringan Lapis Tipis." Jurnal Riset Teknologi Industri 10, no. 1 (2016): 46–55. http://dx.doi.org/10.26578/jrti.v10i1.1752.

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This study aims to determine the performance of a continuous and intermittent sun drying of fermented-cocoa bean by using thin-layer drying method. Continuous drying using a solar dryer finned-flat plate collector type which is operated in two modes drying time, daytime and night time. During the day, the cocoa beans are dried in the drying chamber using hot air generated by the solar collectors. In the nighttime, desiccant (CaCl2) was added to the drying chamber that had been isolated. Open sun drying as intermittent drying of cocoa beans is done only on daytime. The drying process is termina

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Jadallah, Abdullateef A., Mohammed K. Alsaadi, and Saeef A. Hussien. "The hybrid (PVT) double-pass system with a mixed-mode solar dryer for drying banana." Engineering and Technology Journal 38, no. 8A (2020): 1214–25. http://dx.doi.org/10.30684/etj.v38i8a.535.

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In this paper, the hybrid PVT double pass system with a mixed-mode solar dryer type under forced convection has been designed, fabricated and installed for drying crops. The dryer was tried by drying 300 grams of banana slices in the air temperature of dryer range from 43.2 to 60.2°C. The initial moisture rate of banana was about 78% and the most dropped in moisture content was from 78% to 33% after 8 hours of the drying process. The banana slices are distributed in two identical trays and it was noticed that the most and least decreasing in weight of banana samples was from 150 to 48 gram and

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Abubakar, S., FO Anafi, MU Kaisan, S. Narayan, S. Umar, and UA Umar. "Comparative analyses of experimental and simulated performance of a mixed-mode solar dryer." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 234, no. 7 (2019): 1393–402. http://dx.doi.org/10.1177/0954406219893394.

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Agricultural produce upon harvesting have high moisture content which makes it unsafe for storage as the moisture in the crops attracts microorganisms which result in deterioration of the products. A solar dryer was developed, simulated and tested under the weather conditions of Zaria, Nigeria. TRANSYS 16.0 software was used to simulate the collectors’ outlet air temperature. A MATLAB code was written to compute the weight losses of yam slices present in a drying chamber. The computed Nash-Sutcliffe Coefficient of Efficiency values and its corresponding root means square errors between the mod

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Edeoja, A. O., and A. O. Owolabi. "Small Scale Investigation of the Potential of Solar Drying of Water Hyacinth (Eichhornia Crassipes) as A Control Measure in Makurdi." NIGERIAN ANNALS OF PURE AND APPLIED SCIENCES 6 (December 28, 2015): 129–38. http://dx.doi.org/10.46912/napas.18.

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Water hyacinth is the world's worst water weed that is responsible for many environmental and economical problems. Nigerian fresh waters have been infested with this aquatic weed. In this work, a Natural Convection Mixed Mode Solar Dryer for drying water hyacinth to about 10% of its moisture content was constructed and tested as a component of controlling its infestation of the River Benue. The performance of the dryer was compared with the traditional open–air sun drying as the control for drying water hyacinth in Makurdi, Benue State Nigeria. The water hyacinth was dried for 8 hours each day

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Ekoja, M., S. O. Onyegegbu, and O. V. Ekechukwu. "Heat Transfer Coefficient for a Glazed Transpired Solar Collector in Natural Convection Mode." Journal of Energy Research and Reviews 15, no. 1 (2023): 86–96. http://dx.doi.org/10.9734/jenrr/2023/v15i1300.

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A glazed transpired solar collector (GTC) was set up to operate in natural convection mode. Collector air temperature and velocity were measured at specific points in the collector. Solar radiation, ambient temperature, collector cover glass and absorber temperature were also measured. Using dimensional analysis and the measured data, a heat transfer correlation was obtained for the collector which will enable the heat transfer coefficient to be determined. The GTC heat transfer correlation based on influence of pitch is . The GTC absorber plate hole diameter was 3.0 mm and the pitches ranged

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Et. al., P. M. Venkatesh,. "DESIGN AND FABRICATION OF SOLAR TUNNEL DRYER FOR COPRA APPLICATION." INFORMATION TECHNOLOGY IN INDUSTRY 9, no. 2 (2021): 267–73. http://dx.doi.org/10.17762/itii.v9i2.343.

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A semi-cylindrical forced convection type solar tunnel dryer (STD) was designed and commissioned at M/s Miraj Products Pvt. Ltd., Nathdwara for drying processed tobacco. Essentially it is based on the mixed mode with direct and indirect type of heating mechanism i.e. the heated air from different solar flat plate collectors is passed through drying cabinet. At the same time, the drying cabinet absorbs solar energy directly through the transparent walls and roofs. It consists of 16×3.75 m2 area, tunnel equipped with 12 solar flat plate collectors of 2 m2 each propelled with 2 exhaust fans of 1

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Abdizhapparova, B. T., N. S. Khanzharov, A. Zh Imanbayev, K. M. Abdrakhman, and Z. K. Konarbayeva. "Dry-curing of melon by infrared-convective method." Journal of Almaty Technological University 148, no. 2 (2025): 57–66. https://doi.org/10.48184/2304-568x-2025-2-57-66.

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The article presents the results of research on drying melon of the Torpeda variety in an infrared-convective dryer. The purpose of the study is to develop a method for drying melon using artificial drying, which will ensure reducing of duration of the process, as well as reducing contamination of the product. To solve this problem, a technology for infrared-convective drying of melon has been developed, including preparation of raw materials, peeling and removing seeds, washing, cutting, blanching in a 0.2% solution of citric acid for 3 minutes, infraredconvective drying of slices in a dryer

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Jumaev, Jura, Salim Ibragimov, and Shavkat Mirzaev. "Modeling of the process of solar drying of grapes in indirect type installations with natural air convection." Journal of Physics: Conference Series 2573, no. 1 (2023): 012043. http://dx.doi.org/10.1088/1742-6596/2573/1/012043.

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Abstract The paper models the process of natural convection of an indirect type dryer mathematically for the accumulation and absorption of heat which uses water. The data from the experiment conducted by the authors of the work is used as the initial data. The Reynolds equations and the temperature distribution equations are used for the mathematical model considering the Boussinesq hypothesis. The SIMPLE control volume method is used in the paper for the difference approximation of the initial equations. The temperature and velocity fields in the drying chamber are determined. It is revealed

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Kothari, Surendra, N. L. Panwar, and Saurabha Chaudhri. "Performance evaluation of exhaust air recirculation system of mixed mode solar dryer for drying of onion flakes." International Journal of Renewable Energy Technology 1, no. 1 (2009): 29. http://dx.doi.org/10.1504/ijret.2009.024729.

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Etim, P. J., A. B. Eke, and K. J. Simonyan. "Effect of air inlet duct features and grater thickness on cooking banana drying characteristics using active indirect mode solar dryer." Nigerian Journal of Technology 38, no. 4 (2019): 1056. http://dx.doi.org/10.4314/njt.v38i4.31.

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Arslan, Erhan, Azim Doğuş Tuncer, Meltem Koşan, Ekin Can Dolgun, and Mustafa Aktaş. "Designing of a New Type Air-Water Cooled Photovoltaic Collector." Tehnički glasnik 14, no. 1 (2020): 41–45. http://dx.doi.org/10.31803/tg-20190227095246.

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The importance of photovoltaic-thermal (PV / T) collector systems in renewable energy technologies is increasing for combined hybrid electrical heat applications. The efficiency of photovoltaic (PV) systems varies between 5-20%. On average, 15% of the solar radiation coming to the PV panel surface is converted to electrical energy and the remainder is lost. In this study, a PV/T collector was designed using two different fluids simultaneously and its efficiency was calculated numerically. PV/T collector systems are specifically designed for agricultural production and their advantages are disc

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