scholarly journals Design and Development of Solar Cooker cum Dryer

2015 ◽  
Vol 10 (3) ◽  
pp. 985-993 ◽  
Author(s):  
F. G Sayyad ◽  
N. R Sardar ◽  
J. P Rathod ◽  
U. A Baria ◽  
B. K Yaduvanshi ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Solar Energy ◽  
Solar Collector ◽  
Design And Development ◽  
Renewable Source ◽  
Solar Dryer ◽  
Drying Chamber

Solar energy represents non-polluting, inexhaustible renewable source of energy that can be utilized economically to supply man's needs for all the time. A solar cooker cum dryer was designed, developed and fabricated. The performance evaluation of the system was carried out. The solar cooker was used as the solar collector for the solar dryer. A solar cooker having size 750mm x 600mm x 150mm has been developed. The solar dryer was designed with 0.49 m2 collector area. The collector angle was calculated for Jalgaon and it is 24.16˚ facing south. Drying chamber of size 750mm x 600mm x 450mm was designed and fabricated. This equipment was tested for cooking of food materials. The various atmospheric and drying parameters were also observed during the testing

Design, Construction and CFD Modeling of a Banana-Solar Dryer With Double Pass Solar Air Collector

2020 ◽  
Author(s):  
Philemon Mutabilwa ◽  
Kevin N. Nwaigwe
Keyword(s):  
Solar Collector ◽  
Cfd Modeling ◽  
Outlet Temperature ◽  
Cfd Model ◽  
Double Pass ◽  
Solar Dryer ◽  
Solar Air Collector ◽  
Aluminum Pipe ◽  
Drying Chamber ◽  
Design Construction

Abstract A work on the design, construction and computational fluid dynamics modelling of a solar dryer with a double pass solar air collector is presented. Using fundamental relationships, an indirect solar dying system for drying banana was designed and constructed. The system consists of a drying chamber and a double pass solar collector (DPSC), connected together with a flexible aluminum pipe. The system features a unique arrangement, as the drying chamber is underneath the double pass solar collector, and the solar collector itself can be adjusted to an angle of 0° up to 35° the maintenance or research purpose. The DPSC has five longitudinal fins, lying parallel with air flow. The solar dryer is incorporated with a convective DC fan that sucks hot air from the solar collector on to the drying chamber. The DPSC achieved an optimal peak outlet temperature of 345K with a maximum operational efficiency of 72.5%. A computational fluid dynamic (CFD) model is achieved for prediction of the dryer temperature and 3D airflow distribution within the dryer unit using ANSYS 18.2. The CFD model was validated using experimental data. The developed dryer demonstrated improved efficiency over similar dryers, and this is attributable to the unique arrangement of component parts.

Experimental Investigation of Active Solar Dryer for Drying of Chili

2014 ◽  
Vol 953-954 ◽  
pp. 16-19 ◽  
Author(s):  
Yuttachai Keawsuntia
Keyword(s):  
Experimental Investigation ◽  
Solar Collector ◽  
Agricultural Product ◽  
Drying Time ◽  
Sun Drying ◽  
Hot Air ◽  
Solar Dryer ◽  
Drying Chamber ◽  
Better Than

This research paper presents the experimental results of drying of chili by using the active solar dryer and sun drying because of chili is a commercial agricultural product of Thailand. The active solar dryer consisted of a solar collector, a drying chamber and a chimney. The small fans were installed in the solar collector of active solar dryer to provide the air flow circulated in the solar collector and a drying chamber. Drying of chili of 20 kg from moisture content 84 percent wet basis to 10 percent wet basis following the Thai Agricultural Standard (TAS 3001-2010) showed that the use of the active solar dryer to make the drying time reduced about 28.7 percent compared with sun drying because of the hot air temperature inside the drying chamber higher than the ambient temperature about 10 to 15 . The quality of dried chili from the active solar dryer better than dried chili from sun drying.

scholarly journals Energy Analysis of a Hybrid Solar Dryer for Drying Coffee Beans

2020 ◽  
Vol 9 (1) ◽  
pp. 131-139
Author(s):  
Suherman Suherman ◽  
Hasri Widuri ◽  
Shelyn Patricia ◽  
Evan Eduard Susanto ◽  
Raafi Jaya Sutrisna
Keyword(s):  
Moisture Content ◽  
Solar Collector ◽  
Energy Analysis ◽  
Initial Moisture Content ◽  
Solar Drying ◽  
Drying Method ◽  
Drying Time ◽  
Solar Dryer ◽  
Coffee Beans ◽  
Drying Chamber

In this study, hybrid solar drying of coffee beans was performed, and energy analysis was carried out, to assess the system’s performance, in terms of energy efficiency, compared to solar drying and the open sun drying method. The dryer has three compartments: solar collector for collecting solar radiation, drying chamber, and a Liquid Petroleum Gas burner, which acted as an auxiliary heater to assist the thermal energy. The drying chamber has four trays for placing the dried product. The initial moisture content of coffee beans was 54.23% w.b and was reduced to the final moisture content between 11-12% w.b. The coffee beans dried faster when subjected to the solar hybrid drying method, compared to other methods, with the dryer temperature of 40°C, 50°C, and 60°C. Results indicated that the coffee beans’ drying times varied from 10 to 14 hours. However, at temperature 50°C and 60°C for the 1st tray, the water content was reduced more rapidly compared to the other tray. From the results of this study, we can see the different efficiency of solar collector that shows of 54.15% at variable temperature 60°C for drying time 12:00 to 14:00 p.m for hybrid solar drying and for the solar drying process is 50.07% at the range of drying time 12:00 to 14:00 p.m. Mathematical modelling shows that Page model is the most suitable for describing the coffee beans’ drying behaviour using a hybrid solar dryer. The effective diffusivity values found in this experiment are all in the acceptable range for most agricultural products. ©2020. CBIORE-IJRED. All rights reserved

scholarly journals Development of a Multipurpose Solar Dryer

2016 ◽  
Vol 1 (1) ◽  
Author(s):  
Dare Aderibigbe Adetan ◽  
Kolawole Adesola Oladejo ◽  
Surajudeen Obayopo
Keyword(s):  
Solar Collector ◽  
Cost Effective ◽  
Food Preservation ◽  
Experimental Conditions ◽  
Solar Dryer ◽  
Energy Saving Technology ◽  
And Performance ◽  
Design Cost ◽  
Drying Chamber ◽  
Design Construction

In many parts of the world there is a growing awareness that renewable energy has an important role to play in extending technology to the farmers in developing countries to increase their productivity. Solar thermal technology is rapidly gaining acceptance as an energy saving technology in agriculture application. This article presents the design, construction and performance evaluation of a solar dryer for food preservation. In the dryer, heated air from a separate solar collector is passed through beds of grains. The design of the dryer makes provision for the attachment of additional mirrors on two opposite sides of the solar collection chamber. Overall, the dryer is of simple design, cost effective, and made from affordable available materials and require little or no skills for its fabrication and operation. The results obtained fromtests carried out on the dryer revealed that the temperatures inside the drying chamber and the solar collector were highest when the side mirrors were at 45o to the vertical, giving optimum performance under various experimental conditions.

scholarly journals Design and Construction of Indirect Solar Coffee Dryer

2020 ◽  
Vol 9 (4) ◽  
pp. 2943-2956
Keyword(s):  
Solar Collector ◽  
Air Inlet ◽  
Solar Dryer ◽  
Sunshine Hours ◽  
Inlet Hole ◽  
Outlet Hole ◽  
Collector Efficiency ◽  
And Performance ◽  
Drying Chamber ◽  
Design Construction

Drying is the process of removing moisture contents from solid. Solar drying refers to a technique that utilizes incident solar radiation to convert it into thermal energy required for drying purposes. This project presents the design, construction and performance of an indirect type solar dryer for coffee product. In the dryer the air inters into the solar collector from the atmosphere through air inlet hole. This air will be heated in the collector and then pass to the drying chamber through the hole. Then the air exhausts through the outlet hole at the top of the drying chamber. The system designed can handle a capacity of up to 50kg of wet coffee per m2 at a depth of 100 mm. The average sunshine at Bale Robe was found to be 12 hours per day. The daily solar insolation at the site was found to be 5.86kW/m2 of surface per day. By utilizing the solar collector in question and assuming a collector efficiency of 20 %, the total solar energy received is 5.86 kW-hrs/m2 /day or 46.88 kW-hours per day (assuming the sunshine hours per day to be 8 hours). This solar dryer has a collector efficiency of 39.1%, a pick-up efficiency of 49.3%, and a system efficiency of 32.2%. the collector area of the system is calculated to be 1.11m2 and the total length of 1000mm by 300mm. The drying chamber is essentially a cabinetry dryer and measures 1020mm × 800mm × 30mm. It accommodates a drying bin which acts as the holding compartment for the wet coffee to be dried. The base of the drying chamber is made of a block of wood material 50mm deep, since wood is a good thermal insulator. The wood must be well seasoned and pre-treated to ensure it is protected from the humid environment. The air outlet is fitted at the top of the drying chamber which serves as the exit for the moisture ridden air. It is important since it ensures that moisture does not condense at the top of the drying chamber and speeds up the rate of drying through creating the suction effect. The drying bin measures 800mm × 800mm × 20mm.

scholarly journals Development of a horizontal three bladed windmill with vortex tubes

2021 ◽  
Vol 5 (1) ◽  
pp. 37-44
Author(s):  
Paul Major ◽  
A. S. Adavbiele ◽  
S. O. Jimoh
Keyword(s):  
Performance Evaluation ◽  
Wind Speed ◽  
Solar Energy ◽  
Wind Energy ◽  
Electric Energy ◽  
Maximum Speed ◽  
Environmental Friendliness ◽  
Renewable Source ◽  
Negative Effect ◽  
Vortex Tubes

Researchers have been continuously searching for the most readily available means of producing electricity without any negative effect on the environment. Renewable source of energy like solar energy, hydro electric energy, biomass and wind energy has been considered as the alternative. Wind energy among others is rated the best renewable sources of energy because it’s level of environmental friendliness. In this paper, a horizontal windmill was designed, fabricated and its performance evaluated with two types of vortices and without a vortex. The component parts of the mills are towel, blades, shafts, base, tail vain and vortex. During the design of the windmill, consideration was given to the size, area of the blade and the blade material that produce maximum speed. The performance evaluation was carried out to compare the performance of the mill with the solid vortex, gap vortex and without vortex. The result of the evaluation reflects that the solid vortices have the highest wind speed irrespective of time of the day and with an optimum wind speed of 5.04 m/s. Also, the wind mill performed at a higher efficiency with the vortex compare to when it was running without vortex.  

scholarly journals Experimental Study of Innovative Indirect Solar Dryers

2021 ◽  
Vol 39 (4) ◽  
pp. 1313-1320
Author(s):  
Tadahmun A. Yassen ◽  
Manar S.M. Al-Jethelah ◽  
Hussam S. Dheyab
Keyword(s):  
Experimental Study ◽  
Flat Plate ◽  
Air Temperature ◽  
Thermal Performance ◽  
Solar Collector ◽  
Temperature Variations ◽  
Testing Method ◽  
Solar Dryer ◽  
Flat Plate Solar Collector ◽  
Drying Chamber

The present work experimentally studied two novel solar dryers’ designs, novel indirect solar dryer (NISD) and novel mixed indirect solar dryer (NMISD). The purpose behind this work is to compare the thermal performance of the proposed dryers with that of a traditional indirect solar dryer (TISD). The testing method involved building and thermally testing the three dryers. The NISD is a novel drying chamber with three absorbed surfaces. The NMISD consisted of a flat plate solar collector and NISD. The air temperature at the drying chamber entrance increased by 60% and 68% for the TISD and NMISD, respectively. In the lower space of the drying chamber, the air temperature was decreased by 35% while increased by 39% for the NISD and NMISD, respectively, compared to the TISD. The air temperature in the upper space of the drying chamber increased by 14% and 49% for the NISD and NMISD, respectively, compared to the TISD. The temperature variations through the drying chamber were -26%, 33%, and 3% in the TISD, NISD, and NMISD, respectively. The thermal efficiencies of the NISD and NMISD were 9% and 55%, respectively, higher than the TISD’s.

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