Comparison of a gas fired hot-air dryer with an electrically heated hot-air dryer in terms of drying process, energy consumption and quality of dried onion slices

2012 ◽  
Vol 7 (31) ◽  
Author(s):  
Hany S. EL-Mesery
Keyword(s):  
Energy Consumption ◽  
Drying Process ◽  
Hot Air ◽  
Process Energy ◽  
Air Dryer

scholarly journals RESEARCH OF PLUM DRYING PROCESS

2015 ◽  
Vol 3 ◽  
pp. 494-5 ◽  
Author(s):  
Nurlan Kurmanov ◽  
Azret Shingissov ◽  
Gulzhan Kantureyeva ◽  
Zeinep Nurseitova ◽  
Baurzhan Tolysbaev ◽  
...  
Keyword(s):  
Acid Content ◽  
Ascorbic Acid Content ◽  
Drying Method ◽  
Drying Process ◽  
Air Velocity ◽  
Hot Air ◽  
Sensory Parameters ◽  
Air Dryer ◽  
Kinetics Of

In this study, the drying kinetics of a domestic plum cultivar were examined in a laboratory scale hot-air dryer, SHS-80, at an air velocity of 0.65m s-1 and within the air temperature range of 45 – 75 0С. It was found that the whole fruit dried the best. Also, the study  assessed the influence of the drying method on the quality of the domestic plum cultivar. Dried fruits were assessed for sensory parameters and ascorbic acid content. Studies have shown thatthe proposed method of drying, yields a higher absorbic acid content for the dried product  than the conventional approach.

scholarly journals Effect of IR intensity and air temperature on exergy and energy at hybrid infrared-hot air dryer

2018 ◽  
Vol 24 (1) ◽  
pp. 31-42 ◽  
Author(s):  
Ali Motevali ◽  
Hassan Jafari ◽  
Jafar Hashemi
Keyword(s):  
Air Temperature ◽  
Drying Process ◽  
Airflow Velocity ◽  
Ir Radiation ◽  
Hot Air ◽  
Energy And Exergy ◽  
Exergy Consumption ◽  
Process Energy ◽  
Dog Rose ◽  
Air Dryer

The present study analyses energy and exergy consumption for drying dog-rose flowers using a hybrid infrared and hot-air dryer at three IR (Infrared) radiation levels, three airflow velocities, and three drying temperatures. Results showed that energy and exergy efficiencies sharply increased at the beginning of the drying process. Energy loss, exergy destruction and exergy loss increased with increasing IR radiation, rise in the incoming air's temperature, and decrease of the airflow velocity. The average of lowest energy and exergy efficiencies were 5.76 and 3.98%, respectively, observed at the air temperature of 40?C using an IR radiation of 0.22 W/cm2 and an airflow velocity of 1 m/s. The average of highest energy and exergy efficiency values were 49.92 and 23.65%, respectively, observed at the beginning of the drying process at 60?C using 0.49 W/cm2 IR radiation and an airflow velocity of 0.4 m/s.

A numerical simulation of a line-type paint drying furnace

2019 ◽  
Vol 30 (5) ◽  
pp. 2639-2653
Author(s):  
Jongrak Choi ◽  
Giyeob Yang ◽  
Nahmkeon Hur
Keyword(s):  
Numerical Results ◽  
Drying Process ◽  
Drying Time ◽  
Content Type ◽  
Hot Air ◽  
Air Supply ◽  
Nozzle Configuration ◽  
Paint Drying ◽  
Line Type

Purpose Paint drying is a very important process in an industry where shorter drying time for productivity and lower energy consumption for production cost are required while maintaining the product’s painting quality. In the present study, a drying process in a line-type paint drying furnace equipped with nozzles for hot air supply and moving conveyer belt to dry painted automotive parts is numerically simulated for the flow and heat transfer inside the furnace to evaluate the quality of the drying or baking at the end of the drying process in a production line. Design/methodology/approach A baking window for a specific paint is used for judging the local degree of baking (DOB) of the painted parts, which can be useful to identify under-baked or over-baked locations of the painted parts, and hence the quality of the baking process. Findings Numerical results of a time history of temperatures at two monitoring points on the painted parts were obtained and compared to the measured data in an actual furnace and showed good agreement. Three types of paints were considered in the present study and numerical results showed different drying characteristics. In addition to the original furnace nozzle configuration, two more furnace nozzle configurations with different numbers, direction and speed of hot air supply were simulated to improve the furnace’s drying performance. As a result, a newly suggested nozzle configuration with quick drying paint can give us a remarkable improvement in surface averaged DOB compared to the original nozzle configuration with original paint. Originality/value The present simulation technique and DOB methodology can be used for the optimal design of a drying furnace.

scholarly journals Effects of hot air drying process on lipid quality of whelks Neptunea arthritica cumingi Crosse and Neverita didyma

2019 ◽  
Vol 56 (9) ◽  
pp. 4166-4176 ◽  
Author(s):  
Kai-Qi Gang ◽  
Zi-Xuan Wu ◽  
Da-Yong Zhou ◽  
Qi Zhao ◽  
Xin Zhou ◽  
...  
Keyword(s):  
Drying Process ◽  
Hot Air Drying ◽  
Air Drying ◽  
Hot Air ◽  
Lipid Quality

scholarly journals PEMODELAN PADA PROSES PENGERINGAN MEKANIS TEPUNG KASAVA DENGAN MENGGUNAKAN PNEUMATIC DRYER: HUBUNGAN FINENESS MODULUS DENGAN VARIABEL PROSES PENGERINGAN

2015 ◽  
Vol 35 (04) ◽  
pp. 481 ◽  
Author(s):  
Yus Witdarko ◽  
Nursigit Bintoro ◽  
Bandul Suratmo ◽  
Budi Rahardjo
Keyword(s):  
Dimensional Analysis ◽  
Process Condition ◽  
Average Diameter ◽  
Drying Methods ◽  
Drying Process ◽  
Cassava Flour ◽  
Pneumatic Drying ◽  
Air Dryer ◽  
Fineness Modulus

One of the drying methods, which are applied in the industry of flour production, is that pneumatic drying. A wide variety of the variables that are from both of the characteristics of the dried material and drying process condition greatly affect the quality of drying result. Fineness Modulus (FM) and average diameter of flour are important variables in determining the quality of the flour. The objectives of this research was to formulatea mathematical relationship between various pneumatic drying process variables with the fineness modulus of the materials of cassava flour by applying dimensional analysis. In order to realize this goal, pneumatic drying equipment has been designed and tested with a wide variety of treatments such as the input capacity, drying air velocity, particle’s flour diameter, and temperature of air dryer as well.Keywords: Cassava flour, pneumatic drying, dimensional analysis, fineness modulus ABSTRAKMetode pengeringan yang diterapkan dalam industri pembuatan tepung salah satunya adalah pneumatic drying. Berbagai macam variabel baik dari sifat-sifat bahan yang dikeringkan maupun kondisi proses pengeringan sangat mempengaruhi kualitas hasil pengeringan. Fineness Modulus (FM) dan diameter tepung rata-rata merupakan variabel-variabel yang penting dalam penentuan kualitas dari tepung. Tujuan dari penelitian ini adalah untuk mencari hubungan matematis antara FM dengan variabel-variabel kondisi proses pengeringan pneumatik. Untuk dapat mewujudkan tujuan tersebut telah dirancang peralatan pneumatic drying dan dilakukan pengujian dengan berbagai macam variasi perlakuan seperti kapasitas input, kecepatan udara pengering, diameter partikel tepung, dan temperatur udara pengering.Kata kunci: Tepung ubi kayu, pneumatic drying, analisis dimensi, fineness modulus

Specific Energy Consumption Improvement with Applying Stainless Wire Mesh Porous Material for a Hot Air Dryer

2019 ◽  
Vol 801 ◽  
pp. 345-350
Author(s):  
Ratinun Luampon ◽  
Sungwarn Bunchan ◽  
Bundit Krittacom
Keyword(s):  
Energy Consumption ◽  
Porous Material ◽  
Specific Energy ◽  
Specific Energy Consumption ◽  
Wire Mesh ◽  
Experimental Result ◽  
Drying Rate ◽  
Hot Air ◽  
Air Dryer ◽  
Drying Chamber

This research was proposed to applying stainless wire mesh porous material for specific energy consumption improvement of a hot air dryer. In experimental consist two main parts, first part was a comparison of drying with and without hot air recirculation duct. Second part was a comparison of drying with and without stainless wire mesh porous material in drying chamber and hot air recirculation duct. Tilapia was drying product, stainless wire mesh in drying chamber was constant PPI=8 and 6 layers, stainless wire mesh in hot air recirculation duct was constant PPI=8 and varied layer at 6, 8 and 12 layers and hot air recirculation ratio 40%, 60% and 80%. Experimental result was, drying with hot air recirculation duct was higher drying rate than without recirculation duct and drying rate was increased, drying time was decreased and SEC was decreased with increased hot air recirculation ratio. At recirculation ratio 80%, SEC was lowest and decreased to 54.52% compared with without recirculation duct. Therefrom, the stainless wire mesh porous materials were inserted in the drying chamber and recirculation duct at PPI=8, 6 layers and PPI=8, 12 layers, respectively and used recirculation ratio 80%, it was found that SEC was lowest and decreased as about 62.21%.

Energy Reduction of Refined Sugar Drying Process in Rotary Dryer and Conditioning Silo Consolidate

2013 ◽  
Vol 805-806 ◽  
pp. 633-636 ◽  
Author(s):  
Chamlong Phoosodsoong ◽  
Chanoknun Sookkumnerd
Keyword(s):  
Significant Variation ◽  
Transfer Rate ◽  
Energy Reduction ◽  
Drying Process ◽  
Hot Air ◽  
Perfect Performance ◽  
Conditioning Process ◽  
Rotary Dryer ◽  
Low Humidity

Amount of water content in fresh air phenomena direct heat affect to be changed fresh air to hot air state for reducing refined sugar moisture during drying and conditioning process. A change relative humidity of air results in a significant variation of heat transfer rate. Therefore, in this research energy reduction of refined sugar drying and conditioning process study of these phenomena was conducted both experimentally and theoretically. Several experiments was performed employing a rotary dryer and a conditioning silo. In each experiment one of the air moisture content was changed and the resulting consumption of steam changed on the process was measured. The objective of this research was to reduce exhaust steam to heated up fresh air to hot air by installing dehumidifier. Evaluation of these results showed that the low humidity of fresh air are well suited for applied of refined sugar drying process, giving the perfect performance in which quality of refined sugar impacted can be eliminated and reduction of energy can thereby improve, with the aim of enhancing energy saving.

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