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Register a new userPhysical and Mathematical Study of the Mechanism of Evaporation Emulsion Droplets Energetic (Fuel - Water) at Different Stages in a High-Temperature Oxidized Center
الدراسة الفيزيائية و الرياضية لآلية تبخر قطرات مستحلب طاقي (فيول – ماء) في الوسط المؤكسد عالي درجة الحرارة
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حسن علي وسوف( باحث )
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يتضمن هذا البحث دراسة عن المستحلبات الطاقية المستخدمة كوقود بديل في محطات توليد الطاقة الحرارية أو في محركات الاحتراق الداخلي، و آلية تشكيل المستحلبات الطاقية ، و عملية التكيف حيث تتشكل الفقاعات في السوائل نتيجة للتدويم بسرعات دوران عالية، و تمت لأول مرّة في سوريا دراسة مفصلة لشروط استقرار هذا النمط من المستحلبات الطاقية (فيول – ماء). و في هذا البحث تمت دراسة الخصائص الفيزيائية و الفيزيائية الحرارية عند تسخين قطرات مستحلب الوقود الطافي حتى إتمام عملية التبخر بشكل كامل ، و قد أظهرت الدراسة أن تشكل الفقاعات الغازية يؤدي إلى ظهور قوى توتر سطحي تؤثر على سرعة عملية التبخر، و أن انفجار هذه الفقاعات داخل قطرات الوقود المرذذة يؤدي إلى تشتت مضاعف لهذه القطرات داخل حجرة الاحتراق.
This research includes the study of energy emulsions used as an alternative fuel in thermal power stations or in internal combustion engines, and the mechanism of the formation of emulsions energy, and where the process of cavitations bubbles formed in the fluid as a result of a high-speed spin rotation, has been studied for the first time in Syria, a detailed study of the terms of the stability of this type of energy emulsions (Fuel- water). This article describes physical peculiarities of competitive phase that emerges when drops of water-fuel emulsion are heated. It is shown that the process of micro explosion indrops is determined by the amount of water contained in the fuel and by disparity of emulsion.
References used
A. Kovács, Aspects of refining biodiesel by product glycerine, Petroleum & Coal. vol. 53 (1), pp. 91-97, 2011
T. Kocsisova, J. Cvengroš, G, phase from methyl ester production splitting and refining, Petroleum and Coal. vol. 48(2), pp. 1-5, 2006
A. Singhabhandhu, T. Tezuka, A perspective on incorporation of glycerin purification process in biodiesel plants using waste cooking oil as feedstock, Energy, vol. 35 (6), pp. 2493–2504, 2010
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The aim of this research is to study the most important physical, chemical and
microbial changes in several kinds of infant milk available in local markets. The milk
samples were studied in conditions similar to those used by mothers when they prep
are
infant milk bottles at their houses. The results showed that moisture content increased in all
samples from approximately 1% to 3.2-4.4% after storage for 9 days. Acidity increased
considerably from 0.14% to 0.2%.
The results showed that peroxide value passed the allowable limits (0.25) and
reached about (0.47) in samples stored for 9 days at room temperature. However, the value
for samples stored in the refrigerator ranged between (0.25-0.29). The free acidity number
of fat for all samples specially the refrigerated ones was within the natural limits (<0.5).
Chromatographic analyses showed apparent differences in fatty acid percentages between
the kinds of milk. The rate of lenoleic acid (C 18-2 ) decreased during storage in all samples
and in all conditions.
Soluble nitrogen increased in all samples at the end of storage and the highest value
was 0.49% in Nido milk samples. The solubility of milk samples was checked during
storage and was found to decrease very little ( 1%).
The total count of aerobic bacteria showed that all samples conform to the Syrian
standards (No. 197, 1996) during the first six days of storage, but they passed the upper
limits at the end of storage. However, all samples were free of pathogenic microbes .
This research study the effect of the proportion of the media (water - alcohol ) to determine where the arsenic used alcohol ( methanol _ ethanol _ propanol ) Using a Potentiometric method. It conducted the calibration process for the specific size o
f the solution studied a specific size of the standard solution of iodine Using a Potentiometric method , after the application of analytical conditions and technical optimal to determine arsenic , and then we studied the effect of mixing ratio on the detection limit for arsenic in mixed media (water _ Alcohol ) .
The study showed that the value of the detection limit of arsenic vary with the type of alcohol used and accounted for in the reaction medium , it reached to (1× 10-7 M) in media (75:25 water _ methanol ) , but when you use a media ( 75:25 water _ ethanol ) arrived to the limit of detection (1×10-4 M ), As for propanol arrived to the limit of detection (1×10-3 M).
where the value reached detection limit of arsenic to (1× 10-5 M) in media ( 50:50 water _ methanol ) , but when you use a media ( 50:50 water _ ethanol ) arrived to the limit of detection (1×10-3 M ), As for propanol arrived to the limit of detection (1×10-2 M).
The study showed that the use of the ratio ( 75:25 water _ alcohol ) gave a higher value limit of detection and therefore better results .
Was calculated as the standard deviation and standard deviation percentile confidence limit in addition to the feedback that indicates the efficiency of the method of determining the concentration of arsenic detection limit for each medium.
Evaporation forms one of the hydrology cycle elements that it's hard to measure its actual amounts in the field conditions, so it’s estimated by calculations of experimental relations, which depend on climatic elements data. So the research goal is t
o build a mathematical model to estimate monthly evaporation amount in plain area of Syrian Coast, using Artificial Neural Network (ANN), and depending on dry air temperature, and produce comparison study between the results of network and other models. The mathematical model was built by the (NN-tool box), which is one of the v tools. A multilayer ANN architecture of error Back-propagation algorithm was built. The suitable training algorithms, number of hidden layers, number of neurons in each hidden layer, were determined.
The results showed that the ANN (1-9-1) was the best model with MSE of 0.0032 for validation group, using Transfer Function Logsigmoid and Linear in hidden and output layers, respectively.
A comparison model for the results obtained from the proposed ANN with EVANOV model by using SIMULINK technique was developed. This indicated that the ANN using temperature only gives results more accurate than EVANOV equation in determining evaporation.
This study has been carried out using the onion and pepper seeds to
determine the effects of the aqueous medium temperature, during treatment
with oxygen, on the germination percentage seed vigor and for determining the
period needed for the treat
ment with the oxygen as well.
The treatment period has taken ١٢-٣٦ hours according to the kind of crop
and the medium temperature, which varied between ١٠-٣٠ °C.
Results of the study indicated that the treatment of seeds with oxygen, in an
aqueous medium, improved the germination percentage and the seed vigor. The
period needed for the treatment of the seeds with oxygen differs according to
the kind of crop and the temperature of the medium and varies between ١٨-٢٤
hours with respect to the onion seeds, and between ٢٤-٣٦ hours regarding the
pepper seeds. The period needed for treatment with oxygen decreases with the
rise of temperature.
Carnation is one of the most important crop for cut flowers not only in
Syria but all over the world.
The producers in Syria and in other countries are suffering during the
seasons of hot temperature from dwarfing of the plants and the production
of
small flowers.
The work conducted here was to investigate the effect of high temperature
on flower development and morphology.
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