scholarly journals Performance Evaluation of a Solar Tunnel Dryer For Around The Year Use

2017 ◽  
Vol 5 (3) ◽  
pp. 414-421
Author(s):  
Arjoo Arjoo ◽  
Yadvika Yadvika ◽  
Y.K. Yadav
Keyword(s):  
Performance Evaluation ◽  
Moisture Content ◽  
Sensory Evaluation ◽  
Thermal Efficiency ◽  
Load Condition ◽  
Atmospheric Temperature ◽  
Full Load ◽  
Tunnel Dryer ◽  
Full Loading ◽  
Load Conditions

This study was done to evaluate the performance of a walk-in type solar tunnel dryer for around the year use. In the present study, the performance of solar tunnel dryer was evaluated at no load and at full load conditions. Full loading was done with garlic, chili, fenugreek and aonla candy according to their seasonal availability in Hisar, India. At no load condition, performance was evaluated during three seasons i.e summer, winter, and autumn. During full load, the dryer reduces the moisture content of garlic from 65% (w.b.) to about 8.5% (w.b.) in 8 days, chilli from 77%(w.b.) to 7% (w.b.) in 7 days, fenugreek from 86% (w.b.) to 7.2% (w.b.) in 5 days and aonla candy from 44% (w.b.) to a safe moisture content of 16%(w.b.).The thermal efficiency of the dryer was also measured and was found between 8.89% to 17.63%. A temperature of 15-30 ºC higher than the atmospheric temperature was recorded inside the dryer. Products dried were hygienic and their sensory evaluation showed that they were of good quality and highly acceptable.

scholarly journals DESIGN AND FABRICATION OF SOLAR TUNNEL DRYER FOR COPRA APPLICATION

2021 ◽  
Vol 9 (2) ◽  
pp. 267-273
Author(s):  
P.M. Venkatesh, Et. al.
Keyword(s):  
Moisture Content ◽  
Ambient Temperature ◽  
Flat Plate ◽  
Initial Moisture Content ◽  
Load Condition ◽  
Full Load ◽  
Heating Mechanism ◽  
Tunnel Dryer ◽  
Heated Air ◽  
Load Conditions

 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 kW capacity placed on both ends of the tunnel. The dryer was tested at no-load and full-load conditions.  During no-load, without flat plate collectors, temperatures inside the dryer were about18-20℃ higher than the ambient temperature during summer day-light, where as in no-load with flat plate collectors, it was about 30℃ higher than the ambient temperature.  A batch of processed tobacco of 500 kg with an initial moisture content 138% d.b. were successfully dried in full load condition to have final moisture content of about 8.7% d.b. in 8 h. It has been observed that STD has many other advantages i.e. getting rid of toxicant gas to labours during opening drying due to lime presence in material, avoidance of product expose to fly contamination and dust concentrations etc.

scholarly journals Performance Evaluation of Solar Tunnel Dryer for Drying of Garlic.

2017 ◽  
Vol 5 (2) ◽  
pp. 212-218 ◽  
Author(s):  
Arjoo Arjoo ◽  
Yadvika Yadvika ◽  
Y.K. Yadaadav
Keyword(s):  
Performance Evaluation ◽  
Moisture Content ◽  
Thermal Efficiency ◽  
Initial Moisture Content ◽  
Drying Process ◽  
Tunnel Drier ◽  
Drying Time ◽  
Tunnel Dryer ◽  
Safe Level ◽  
And Performance

This paper presents dying efficiency and performance of the solar tunnel dryer for drying of garlic. The dryer is a tunnel like semi-cylindrical in shape, poly house made up of UV-stabilized polyethylene sheet. The capacity is large enough that it can be used to dry 400 kg of garlic under controlled environmental conditions. The temperature inside the dryer was always higher than the ambient and the variation varied from 8-30 ºC. Initial moisture content of garlic was reduced from 66 % (w.b.) to about 9 % (w.b.) in 9 days which is considered to be a safe level. During the drying process the average thermal efficiency of the drier was estimated to be about 13.45 %. Drying time was considerably reduced with the use of a solar tunnel drier and pressing of the sample. Also, the final dried garlic was found to be good in terms of quality and sensory evaluation shows that it is highly acceptable.

A Study with Diesel Additives and Fish Methyl Ester on Diesel Engine at Full Load Condition

2015 ◽  
Vol 789-790 ◽  
pp. 179-183 ◽  
Author(s):  
G.R.K. Sastry ◽  
Jibitesh Kumar Panda ◽  
Prasenjit Dutta
Keyword(s):  
Diesel Engine ◽  
Methyl Ester ◽  
Present Experiment ◽  
Fossil Fuel ◽  
Load Condition ◽  
Performance And Emission ◽  
Full Load ◽  
Alternative Sources ◽  
Load Conditions ◽  
Better Than

The scarcity of conventional fossil fuel, their increasing cost and the detrimental effects of combustion engendered pollutants seems to make alternative sources more appealing. Fish methyl ester is available abundantly. The present experiment assess the performance and emission distinctive of a diesel engine using dissimilar blends of methyl ester of fish, 2-EHN and ethanol with mineral diesel. Methyl ester and diesel additive was blended with diesel in proportions of 20% and 100% by mass and studied under full load conditions. The performance and emission parameters were found to be better than the mineral diesel.

scholarly journals A Predictive Study of a New VCR Engine with High Expansion Ratio and High-Efficiency Potential under Heavy Load Conditions

Energies ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1655
Author(s):  
Jiansheng Lin ◽  
Shu Yang
Keyword(s):  
Compression Ratio ◽  
Thermal Efficiency ◽  
High Efficiency ◽  
Control Variable ◽  
Load Condition ◽  
Heavy Load ◽  
Variable Compression Ratio ◽  
The Future ◽  
Load Conditions ◽  
Variable Compression

Facing the future, whether working alone or with electric motors, a new type of variable compression ratio (VCR) engine that can achieve a high thermal efficiency under heavy load conditions is necessary. Hence, we propose a dual shaft control variable compression ratio (DSC-VCR) engine based on a gear-driven eccentric sleeve. With the improved position of gears, DSC-VCR allows for double larger gears to share the load, and the engine can operate with a larger eccentric size and a narrower adjustment range compared to other similar mechanisms. This helps to reduce the difficulty of chamber shape design, avoid collisions between valves and piston, and above all, makes the engine operate with a larger overexpansion ratio (OER, the ratio of expansion stroke and compression stroke) under all conditions to improve engine efficiency. Based on a 1.5 T four-cylinder engine, the OER can be increased to over 1.16 with the eccentric size of 6.5 mm. According to the theoretical thermal efficiency calculation while considering turbocharging, the per millimeter increase of eccentric size improves the theoretical efficiency by 0.0025–0.006. The predictive simulation presented that the reduction of residual gas helps to increase the compression ratio (CR) from 9.5 to 10.1 under a full load condition. Larger OERs and CRs help to reduce brake specific fuel consumption (BSFC) by 6%–8%. In the case of a 75% load, about 3.51% of efficiency increase was realized. All of these prove that DSC-VCR is a high-efficiency potential mechanism for the future.

scholarly journals Design of tunnel drier for the non-centrifugal sugar industry

2020 ◽  
Author(s):  
S P Raj ◽  
M Srinivas ◽  
B Sravya ◽  
T S O'Donovan ◽  
K S Reddy
Keyword(s):  
Moisture Content ◽  
Sugar Industry ◽  
Energy Requirement ◽  
Minimum Energy ◽  
Drying Time ◽  
Tunnel Dryer ◽  
Drying Models ◽  
Exit Temperature ◽  
Time And Energy ◽  
Load Conditions

Abstract The quality and shelf-life of NCS (non-centrifugal sugar) mainly depend on the moisture content present in it. NCS formed by the current practice of open sun drying contains moisture substantially greater than the acceptable level of 3%. This paper presents the work undertaken to design a tunnel dryer to achieve the required moisture content of granular NCS for various load conditions. An experimental investigation was conducted on a laboratory-scale dryer to achieve the required moisture content for various loads. This experimental data was compared with the output of two drying models and a validated one that could be used to design an industrial-scale dryer. For various load conditions on each tray and dryer exit temperature, nine different cases were determined. The number of trucks, drying time, and energy requirements were computed using the validated theoretical model. A tunnel dryer with a length, height and width of 18, 1.2 and 1 m respectively and 18 trucks with 24 trays on each truck is shown to be dry 1 tone of NCS based on the minimum energy requirement of 176.49 MJ, and a drying time of 68 min.

scholarly journals Design of Tunnel Drier for the Non-centrifugal Sugar Industry

2020 ◽  
Author(s):  
S.P. Raj ◽  
B Sravya ◽  
Morapakala Srinivas ◽  
K.S Reddy
Keyword(s):  
Moisture Content ◽  
Sugar Industry ◽  
Energy Requirement ◽  
Minimum Energy ◽  
Drying Time ◽  
Tunnel Dryer ◽  
Drying Models ◽  
Exit Temperature ◽  
Time And Energy ◽  
Load Conditions

The quality and shelf-life of NCS (Non-centrifugal sugar) mainly depend on the moisture content present in it. NCS formed by the current practice of open sun drying contains moisture substantially greater than the acceptable level of 3%. This paper presents the work taken up to design a tunnel dryer to attain require moisture content in granular NCS for various load conditions. Initially, an experimental investigation had been carried out on a laboratory scale dryer to achieve required moisture content (< 3%) for various load conditions. This experimental data was used for validating two drying models and found that one of the models is best suitable for designing an industrial-scale dryer. For various load conditions on each tray and dryer exit temperature, nine different cases were arrived at. The number of trucks, trays, drying time and energy requirements were computed using the suitable theoretical model. Tunnel dryer with a length of 18 m, a height of 1.2 m, a width of 1 m, number of trucks of 18 and 24 number of trays on each truck was found to be the suitable dryer to dry 1 tone of NCS based on the minimum energy requirement of 176.49 MJ, and a minimum drying time of 68 minutes.

Fuzzy Logic Based Rotor Health Index of Induction Motor

2015 ◽  
Vol 16 (5) ◽  
pp. 443-449 ◽  
Author(s):  
Rajul Misra ◽  
G. L. Pahuja
Keyword(s):  
Fuzzy Logic ◽  
Induction Motor ◽  
Load Condition ◽  
Health Index ◽  
Full Load ◽  
Squirrel Cage ◽  
Motor Current Signature Analysis ◽  
Detection And Diagnosis ◽  
Cage Induction Motor ◽  
Load Conditions

Abstract This paper presents an experimental study on detection and diagnosis of broken rotor bars in Squirrel Cage Induction Motor (SQIM). The proposed scheme is based on Motor Current Signature Analysis (MCSA) which uses amplitude difference of supply frequency to upper and lower side bands. Initially traditional MCSA has been used for rotor fault detection. It provides rotor health index on full load conditions. However in real practice if a fault occurs motor can not run at full load. To overcome the issue of reduced load condition a Fuzzy Logic based MCSA has been designed, implemented, tested and compared with traditional MCSA. A simulation result shows that proposed scheme is not only capable of detecting the severity of rotor fault but also provides remarkable performance at reduced load conditions.

Torch Ignition: Ideal for Lean Burn Premixed-Charge Engines

1994 ◽  
Vol 116 (4) ◽  
pp. 793-798 ◽  
Author(s):  
N. S. Mavinahally ◽  
D. N. Assanis ◽  
K. R. Govinda Mallan ◽  
K. V. Gopalakrishnan
Keyword(s):  
Combustion Chamber ◽  
Fuel Economy ◽  
Thermal Efficiency ◽  
Lean Burn ◽  
Ignition System ◽  
Part Load ◽  
Full Load ◽  
Spark Plug ◽  
Initiation And Propagation ◽  
Load Conditions

Sluggish flame initiation and propagation, and even potential misfiring, become major problems with lean-fueled, premixed-charge, spark-ignited engines. This work studies torch ignition as a means for improving combustion, fuel economy, and emissions of a retrofitted, large combustion chamber with nonideal spark plug location. A number of alternative configurations, employing different torch chamber designs, spark-plug locations, and materials, were tested under full-load and part-load conditions. Results indicate a considerable extension of the lean operating limit of the engine, especially under part-load conditions. In addition, torch ignition can lead to substantial thermal efficiency gains for either leaner or richer air-fuel ratios than the optimum for the conventional ignition system. On the richer side, in particular, the torch-ignited engine is capable of operating at maximum brake torque spark timings, rather than compromised, knock-limited spark timings used with conventional ignition. This translates into thermal efficiency improvements as high as 8 percent at an air-fuel ratio of 20:1 and full load.

Pengeringan Biji Kakao dengan Pengering Surya Tipe Terowong Berpenggerak Sel Fotovoltaik di Manokwari

Agrotek ◽  
2018 ◽  
Vol 2 (6) ◽  
Author(s):  
Wilson Palelingan Aman
Keyword(s):  
Moisture Content ◽  
Performance Test ◽  
Initial Moisture Content ◽  
Maximum Temperature ◽  
Photovoltaic Module ◽  
Cocoa Beans ◽  
Drying Time ◽  
Tunnel Dryer ◽  
Heat Collector ◽  
New Construction

<em>A research about cocoa beans drying used solar tunnel dryer with photovoltaic module driven have conducted in Manokwari. Solar tunnel dryer used in this research adapted from type Hohenheim with photovoltaic module and integrated air heat collector has been installed at the Department of Agricultural Technology, Papua State University Manokwari to dried cocoa beans. The objectives of this research were to design solar tunnel dryer and evaluate it�s performance in dryed cocoa beans. The result obtained was a new construction of solar tunnel dryer for cocoa beans with dimensions 6 m of length and 0,9 m of wide. The dryer completed with photovoltaic module to drive the blowers of hot drying air. �Performance test of the dryer showed that drying of 10 kg of cocoa beans with initial moisture content about 70% wet basis needed 13 hours of drying time to achieved final moisture content about 7,17% wet basis. The drying time achieved was faster compared than traditional solar drying that needed 20 hours of drying time. The maximum temperature achieved in drying chamber was 60 <sup>o</sup>C.</em>

Sign in / Sign up

Export Citation Format

Share Document