Study of the Lemon Drying Process Using a Solar Dryer

2015 ◽  
Author(s):  
Hilario Terres ◽  
Sandra Chavez ◽  
Raymundo Lopez ◽  
Arturo Lizardi ◽  
Araceli Lara ◽  
...  
Keyword(s):  
Temperature Distribution ◽  
Solar Energy ◽  
Boundary Conditions ◽  
Density Distribution ◽  
Drying Process ◽  
Know How ◽  
Solar Dryer ◽  
Compact Field ◽  
Complete Study ◽  
Several Intervals

A complete study for a solar dryer is shown. In this work the lemon drying process is considered. Also, results for temperature distribution, currents lines velocities and density distribution are presented inside of the dryer chamber. Curves for dried are obtained when the lost mass of the lemon is measured. For this purpose, a digital balance is used and during several intervals of time the measures are done. A Compact Field point device of National Instrument is used to measure temperatures inside of the chamber in the dryer. Thermocouples k-type were placed in different points. By acquisition data, the values of temperature were measured for the test. By means of software (ANSYS) is discretized the inner zone and using the temperatures as boundary conditions. Solving the system defined for the equations according to the mesh defined, temperature, velocities and densities are determined. The results allowing to identify what is the behavior inside of the dryer and how the drying process happens. This way to study the drying process can be useful when the behavior inside of the chamber wants to be evaluated. In addition, this work can be useful in the design of solar dryers because allows to know how the trays can be placed to take advantage in the best way the solar energy in solar dryers.

scholarly journals Solar Dryer with Integrated Energy Unit

2021 ◽  
Vol 2(50) ◽  
Author(s):  
Sergey Korobka ◽  
◽  
Sergey Syrotyuk ◽  
Dmitry Zhuravel ◽  
Boris Boltianskyi ◽  
...  
Keyword(s):  
Heat Exchange ◽  
Solar Energy ◽  
Moisture Transfer ◽  
Diagnostic Techniques ◽  
Material Surface ◽  
Drying Process ◽  
Energy Unit ◽  
Solar Dryer ◽  
Exchange Processes ◽  
Deformed State

The work is devoted to the issue of the rational use of the solar energy in the technological process of fruit drying based on the use of solar drying devices, which are applied in various sections of the agro-industrial centers of Ukraine. The aim of this research was intensification of the fruits drying process using the solar energy by combining an air collector and drying chamber into a single power unit. To achieve the aim the heat exchange diagnostic techniques with alternative potentials of diffusion and moisture transfer was developed. This technique differs from those existing for the heat exchange research in that it allows the intensity of the moisture evaporation from a unit of the material surface to be calculated, based on the synthesis of the moisture content and the irreversible major laws of processes of the heat exchange characteristics of the fruits drying using the solar dryer. The above model makes it possible to diagnose the heat exchange processes and analyze the mathematical model of the heat exchange processes. It also allows modeling the changeable diffusion and moisture transfer potentials based on the dependences obtained and for the purpose of a further application in the methods and devices development to control the strain-deformed state of the fruits during the drying process. The method is offered for the calculation of diffusion and moisture transfer during drying fruits in the solar dryer.

scholarly journals Temperature, moisture and stress fields in deck in the course of drying process in atypical chamber condensing sawn wood kiln

2004 ◽  
Vol 52 (1) ◽  
pp. 159-168
Author(s):  
Jan Tippner ◽  
Petr Koňas
Keyword(s):  
Numerical Simulation ◽  
Finite Element Method ◽  
Finite Element ◽  
Temperature Distribution ◽  
Boundary Conditions ◽  
Parametric Model ◽  
Moisture Distribution ◽  
Stress Fields ◽  
Drying Process ◽  
Model Pile

Common parametric model of sawn wood, geometry and finite element and physical parametric model pile sawn wood and its immediate airy environment was introduced. By the help of numerical simulation with Finite Element Method utilization the description of temperature distribution, dampness and stress in wood, in dependence on temperature and moisture distribution in airy environment of sawn wood kiln was included. Discussion about problem of design model, mesh refinement and definition boundary conditions was opened. Results of simulations make possible to propound the optimization of drying process. Direction of next investigation was outlined too.

Konsumsi Energi Pada Alat Pengering Surya dan Tipe Bak Untuk Pengeringan Biji Kakao

2019 ◽  
Vol 17 (3) ◽  
Author(s):  
Lamhot P. Manalu
Keyword(s):  
Specific Energy ◽  
Fossil Fuels ◽  
Negative Impact ◽  
Solar Irradiation ◽  
Drying Process ◽  
Food Industries ◽  
Solar Dryer ◽  
Agricultural Applications ◽  
Drying System ◽  
Drying Efficiency

Crop drying is essential for preservation in agricultural applications. It is performed either using fossil fuels in an artificial mechanical drying process or by placing the crop under the open sun. The first method is costly and has a negative impact on the environment, while the second method is totally dependent on the weather. The drying process requires a lot of energy in relation to the amount of water that must be evaporated from the product. It is estimated that 12% of the total energy used by the food industries and agriculture absorbed in this process. Due to the limitation of energy resources, it is important to keep researching and developing of diversification and optimization of energy This study aims to assess the use of energy for cocoa drying using solar energy dryer and bin-type dryer, as well as to determine the drying efficiency of each type of dryer. The results showed that the efficiency of the solar dryer drying system ranges between 36% to 46%, while the tub-type dryers between 21.7% to 33.1%. The specific energy of solar dryer ranged from 6.17-7.87 MJ / kg, while the tub-type dryers 8.58-13.63 MJ / kg. Dryer efficiency is influenced by the level of solar irradiation and the amount of drying load, the higher the irradiation received and more cocoa beans are dried, the drying efficiency is also higher and the specific energy further down.Proses pengeringan memerlukan banyak energi sehubungan dengan banyaknya air yang harus diuapkan dari bahan yang dikeringkan. Pengeringan dapat dilakukan dengan menggunakan pengering mekanis berbahan bakar fosil atau dengan menempatkan produk di bawah matahari terbuka. Metode pertama adalah mahal dan memiliki dampak negatif pada lingkungan, sedangkan metode kedua sangat tergantung pada cuaca. Diperkirakan bahwa 12% dari total energi yang dipergunakan oleh industri pangan dan pertanian diserap untuk proses ini. Mengingat semakin terbatasnya sumber energi bahan bakar minyak maka usaha diversifikasi dan optimasi energi untuk pengeringan perlu terus diteliti dan dikembangkan. Salah satunya adalah pemanfaatan energi surya sebagai sumber energi terbarukan. Penelitian ini bertujuan untuk mengkaji penggunaan energi untuk pengeringan kakao dengan memakai pengering energi surya dan pengering tipe bak, serta untuk mengetahui efisiensi pengeringan dari masing-masing tipe pengering. Hasil kajian menunjukkan bahwa efisiensi total sistem pengeringan alat pengering surya berkisar antara 36% dan 46%, sedangkan pengering tipe bak antara 21.7% dan 33.1%. Kebutuhan energi spesifik alat pengering surya berkisar antara 6.17-7.87 MJ/kg, sedangkan alat pengering tipe bak 8.58-13.63 MJ/kg. Efisiensi alat pengering dipengaruhi oleh tingkat iradiasi surya dan jumlah beban pengeringan, semakin tinggi iradiasi yang diterima pengering serta semakin banyak biji kakao yang dikeringkan, maka efisiensi pengeringan juga semakin tinggi dan kebutuhan energi spesifik semakin turun.Keywords: energy, efficiency, cocoa, solar dryer, bin-type dryer.

CATFISH DRYING (Clarias Batraclus) USING ‘TEKO BERSAYAP’ SOLAR DRYER

2012 ◽  
Vol 2 (1) ◽  
pp. 14-20
Author(s):  
Yuwana Yuwana
Keyword(s):  
Relative Humidity ◽  
Moisture Content ◽  
Ambient Temperature ◽  
Drying Rate ◽  
Drying Process ◽  
Drying Time ◽  
Ambient Relative Humidity ◽  
Solar Dryer

Experiment on catfish drying employing ‘Teko Bersayap’ solar dryer was conducted. The result of the experiment indicated that the dryer was able to increase ambient temperature up to 44% and decrease ambient relative humidity up to 103%. Fish drying process followed equations : KAu = 74,94 e-0,03t for unsplitted fish and KAb = 79,25 e-0,09t for splitted fish, where KAu = moisture content of unsplitted fish (%), KAb = moisture content of splitted fish (%), t = drying time. Drying of unsplitted fish finished in 43.995 hours while drying of split fish completed in 15.29 hours. Splitting the fish increased 2,877 times drying rate.

scholarly journals Converting a food oven into a thermal sanitizer for Personal Protective Equipment against COVID-19: Computational Fluid Dynamics simulation

2021 ◽  
Author(s):  
Eleonora Bottani ◽  
Roberto Montanari ◽  
Andrea Volpi ◽  
Giulio Di Maria ◽  
Federico Solari ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Temperature Distribution ◽  
Personal Protective Equipment ◽  
Experimental Validation ◽  
Dynamics Simulation ◽  
Protective Equipment ◽  
Computational Fluid Dynamics Simulation ◽  
Food Sector ◽  
Know How

COVID-19 brought several management problems, and among these surely the topic of Personal Protective Equipment (PPE) turned out to be crucial. Indeed, in the light of mandatory measurements adopted by governments both for private individuals and companies, their demand has rapidly increased, thus generating shortages, increased waste and unbalanced prices. In response to that, many industrial fields offered their tools and know-how for trying to partly face this issue, and in this paper part of a solution of this kind is presented. Specifically, it is meant the redesign of a food oven produced by an Italian company operating in the food sector (Nilma S.p.A.) for thermal sanitization against the virus in question. In this paper, the simulation of the temperature distribution inside the chamber is simulated, with subsequent experimental validation at 95°C.

scholarly journals Production process development of Nipa bowl from Nipa palm (Nypa fruticans Wurmb.) waste by using solar dryer cabinet for sustainability of Palian river basin community

2019 ◽  
Vol 15 (4) ◽  
pp. 593-596
Author(s):  
Noppadon Podkumnerd ◽  
Supranee Wunsri ◽  
Sujint Khairin
Keyword(s):  
Production Process ◽  
River Basin ◽  
Bacterial Contamination ◽  
Process Development ◽  
Drying Methods ◽  
Drying Process ◽  
Nypa Fruticans ◽  
Solar Dryer ◽  
Nipa Palm ◽  
Palm Leaf

The objective of this research was to develop the process for the production of Nipa bowls from Nipa palm (Nypa fruticans Wurmb.) waste by using solar energy. Two types of solar dryer were investigated, (1) solar dryer cabinet (SDC) and (2) solar dryer cabinet coupled with heater (SDCH) and were compared to the traditional sun dryer (SD) method. The results demonstrated that the use of SDCH could reduce the humidity of the Nipa leaves to 15.23 ± 0.78% within 2 hours. This result was statistically significant at 95% confident compared to those results obtained from SDC (49.91 ± 0.78%) and SD (38.66 ± 0.21%). The dried leaves obtained from the three drying methods were tested for bacterial contamination. For SD, the maximum bacteria contamination was 95,000 ± 40,414 cfu/piece which was higher than SDC (480 ± 173 cfu/piece) and SDCH (463 ± 112 cfu/piece) methods. The SDC and SDCH techniques were implemented at Palian river basin community (Ban Na Yod Tong Nipa Palm Leaf Handicraft) in Wang Won Sub-District, Kantang District,Trang Province, Thailand. These techniques could enhance the drying process of Nipa leaves and thus increase the production of Nipa bowls 3.5 times reducing Nipa waste up to 1.83 tons. The villagers could produce approximately 183,000 bowls/year generating an income of more than 55,800 USD for 60 families.

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