Crop drying by indirect active hybrid solar – Electrical dryer in the eastern Algerian Septentrional Sahara

Boughali, Slimane; Benmoussa, H.; Bouchekima, Bachir; Mennouche, Djamel; Bouguettaia, Hamza; Bechki, Djamel

doi:10.1016/j.solener.2009.09.006

Cited by 122 publications

(66 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…These results are in agreement with others obtained for other temperatures [37,38] and other food products such as carrot, apple, beet pulp etc… [39,40]. The comparison of kinetics obtained at the same temperature and three velocities shows that the drying is faster for the higher velocity [41]. However, for a constant drying temperature 55°C, increasing the drying rate from 0.5 to 1.6m/s is a waste of energy since the increase of drying velocity has no effect on the moisture content as a function of time.…”

Section: Drying Curves and Kineticssupporting

confidence: 92%

Characterization, Drying and Sorption Isotherms of Tunisian Tomato- Experimental and Mathematical Investigation

Hadrich

Kharrat

Kchaou

2016

MOJFPT

View full text Add to dashboard Cite

Section: Drying Curves and Kineticssupporting

confidence: 92%

Characterization, Drying and Sorption Isotherms of Tunisian Tomato- Experimental and Mathematical Investigation

Hadrich

Kharrat

Kchaou

2016

MOJFPT

View full text Add to dashboard Cite

“…Boughali and collaborators [7], report the study of an active (forced convection) indirect solar-electric hybrid dryer used for tomato drying. This dryer worked at different temperatures and a high range of mass flows throughout the dryer (0.04 to 0.08 kg/m 2 ); they found that temperature has a greater influence than wind speed and it is better to use small air flows for the tomato drying process.…”

mentioning

confidence: 99%

Pineapple Drying Using a New Solar Hybrid Dryer

Gudiño-Ayala

Calderón-Topete

2014

Energy Procedia

View full text Add to dashboard Cite

This paper presents the results of an experimental pineapple (Ananas comosus L.) drying study in a new solar hybrid dryer. The dryer is a direct and integrated type, with a black mate pan which measures 1.675 x 0.61 x 0.055 m (1.02 m 2 ). It uses a copper helical tube that conducts hot water, at 80°C, generating extra heat for the drying process; the tube is located at the bottom of the black pan. A caliber 6, transparent vinyl film is used as a cover and the walls and base of the dryer are isolated by 0.0254 m thick fiberglass. It is inclined 23° south and uses pump to recirculate water. The variety of pineapple used was honey, 1/4 of grown age. Each slice was 0.005 m thick, resulting in a mass density of 2.83 kg/m 2 in the drying trays area. To be able to have useful comparisons, drying tests were performed during winter and spring of 2013, using both the hybrid dryer and the traditional solar dryer. Results showed that when initial humidity between pineapples is quite similar (this being one of the most influential factors in changing efficiency, time and other important process variables), evaporation efficiencies are higher in the traditional process; such efficiencies ranging between 22.7% and 24.0%; while the efficiency of the hybrid dryer ranges between 9.3% and 14.0%. This is basically due to the increase of energy loss when using both sunlight and heated water. On the other hand, the time the process took to reach the humidity goal (24.0% humid base or 0.32 dry based) was much faster when using the hybrid dryer. This dryer ended the process in a range of 6.0 to 6.8 hours while the traditional solar process took between 8.0 and 8.8 hours. It is also important to note that the final process was basically homogeneous throughout the dryer, especially when the drying trays on the top end of the dryer were placed 0.03 m further away from the top, and produced a fine quality product with only slight discoloration of the pineapples' side which faced the sun.

show abstract

“…There are attempts to deal with the solar energy periodicity problem by creating hybrid, photovoltaic and thermal element systems, as well as the combination of solar energy conversion systems with heat pumps, biogas production and other installations [28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%