Browsing by Author "Essa F.A."

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An augmented productivity of solar distillers integrated to HDH unit: Experimental implementation
(Elsevier Ltd, 2020) Abdullah A.S.; Omara Z.M.; Bek M.A.; Essa F.A.; Mechanical Engineering Department; College of Engineering; Prince Sattam Bin Abdulaziz University; Saudi Arabia; Mechanical Engineering Department; Faculty of Engineering; Kafrelsheikh University; Kafrelsheikh; 33516; Egypt; Faculty of Engineering; Tanta University; Egypt; General Systems Engineering Department; Faculty of Engineering; October University for Modern Sciences and Arts � MSA; Egypt
A hybrid system of HDH and six wick stills was conducted to scrutinize the achievement of the system under different considerable conditions. Wooden cellulose and aspen pad were chosen as packing materials. Besides, different water flow rates (1, 2, 3, and 4 kg/min) were examined. Also, natural and forced air circulation with different fan speeds (500, 1000, and 1500 rpm) were investigated. The warm water exhausted from HDH was utilized to feed the wick distillers. A fan was fixed at the distillers� backside to condensate the excess vapor from the stills in dehumidifier. Results revealed that the cellulose paper provided higher productivity than the aspen pad. Besides, the optimal values of the water flow rate and the fan speed (causing air flow rate) are 4 kg/min and 1500 rpm, respectively. Moreover, when using the cellulose paper, the forced air circulation produced higher productivity than the natural circulation by 34%. The existence of condenser only improved the distillate by 16.6% compared to 3% improvement due to providing vapor drain only. At 4 kg/min, GORa of the hybrid system was 7.6 when using the condenser and providing a drain compared to 7.3 and 6.1 for the system with a condenser only and without any modifications, respectively. � 2019 Elsevier Ltd
Corrosion study of glaze-ceramics doped cement-kiln-dust soaked in concentrated HCI
(2010) Essa F.A.; Abd-Elaziz T.D.; Zakariya M.R.; Ezz-Eldin F.M.; Chem. Dept; Faculty of Sci.; Menufya Univ.; Menufya; Egypt; MSA University (October Univ. for Modern Sciences and Arts); 6th October City; Egypt; Color Preparation Dept.; Ceramica-Marselia Factory; Egypt; National Center for Radiation Research and Technology; Cairo; Egypt
NEW glaze-ceramics formulated from industrial waste have been prepared. The method consists of introducing cement-kiln-dust (CKD) in the industrial glaze-ceramics with various ratios (10-50%) together with the addition of 10gm boric acid. The chemical durability of the prepared composite cement-dust-glaze-ceramics (CDGC) is investigated using high concentrations of (2,5 & 8N) HCI acid solutions. CDGC are vitrified by melting for four hours at 1400�C � 250�C depending on the amount of CKD introduced. Specifically, the experimental results indicate that the introduction of CKD in industrial glaze decreases durability. At high HCI concentrations, the durabilities of the prepared glaze-ceramics are observed to decrease with increasing the percentage of (CKD) until certain limit and almost constancy. The corrosion results are explained according to the ion exchange mechanism and formation or dissociation of the modified depleted layer. Some hollow and jogged areas are observed by SEM which might be interpreted as evidence of local corrosion phenomena. In addition, the pH values of the leachant solutions are measured. The comparison of hardness for the optimum glaze-ceramic and glaze-ceramic derivatives prepared in this study indicates a degradation % in their chemical and physical properties depending on the amount% of CKD introduced. It is observed that the degradation not only depends on the amount of CKD introduced, but also on the strength of the leaching HCI acid solution. Also, the results show that, the prepared glazes have a surface hardness values ranged from 5.5 to 2.5 in the Mohs scale.