Time filter

Source Type

Tanda, Egypt

Tanta University is an Egyptian university in the city of Tanta, Al Gharbiyah governorate, Egypt. The university is under the direct scientific supervision of the Ministry of Higher Education.It was founded first in 1962 as a branch from the University of Alexandria with the faculty of Medicine only and then it became an independent university named University of the Middle Delta in 1972. It had at that time Medicine, Science, Agriculture and Education faculties. Then, its name was changed into Tanta University in 1973. Wikipedia.

Ellobody E.,Tanta University
Journal of Constructional Steel Research | Year: 2011

This paper investigates the behaviour of normal and high strength castellated steel beams under combined lateral torsional and distortional buckling modes. An efficient nonlinear 3D finite element model has been developed for the analysis of the beams. The initial geometric imperfection and material nonlinearities were carefully considered in the analysis. The nonlinear finite element model was verified against tests on castellated beams having different lengths and different cross-sections. Failure loads and interaction of buckling modes as well as loadlateral deflection curves of castellated steel beams were investigated in this study. An extensive parametric study was carried out using the finite element model to study the effects of the change in cross-section geometries, beam length and steel strength on the strength and buckling behaviour of castellated steel beams. The parametric study has shown that the presence of web distortional buckling causes a considerable decrease in the failure load of slender castellated steel beams. It is also shown that the use of high strength steel offers a considerable increase in the failure loads of less slender castellated steel beams. The failure loads predicted from the finite element model were compared with that predicted from Australian Standards for steel beams under lateral torsional buckling. It is shown that the Specification predictions are generally conservative for normal strength castellated steel beams failing by lateral torsional buckling, unconservative for castellated steel beams failing by web distortional buckling and quite conservative for high strength castellated steel beams failing by lateral torsional buckling. © 2011 Elsevier Ltd. All rights reserved. Source

The present work presents an experimental investigation on the performance of the structured packing cross flow desiccant dehumidification system (DDS). This system is referred as DDS; its heart is the dehumidifier/regenerator. It is used to meet a latent heat load by air dehumidification. Calcium chloride (CaCl2) solution is used as the working desiccant material in this system. The structured packing has a density (specific surface area) of 390m2/m3, corrugation angle of 60° and void fraction of 0.88. The effect of relevant parameters such as air flow rate, desiccant solution flow rate, desiccant solution temperature and concentration and packing thickness on the performance of the system is studied. The performance of the system is evaluated using the mass transfer coefficient, moisture removal rate (MMR), effectiveness and the coefficient of performance (COP). The remarkable increase of mass transfer coefficient and MRR for both deh/reg is observed by increasing both air and solution flow rates. Eventually, the payback period (PP) of the DDS is 11 months with annual running cost savings (ΔCRC) of about 31.24% compared with vapor compression system (VCS) dehumidification. The overall environmental impacts of DDS are nearly 0.63 of VCS. This may emphasize the need of incorporating a desiccant system along with air conditioning applications. © 2011 Elsevier Ltd. Source

El-Agouz S.A.,Tanta University
Energy Conversion and Management | Year: 2014

This paper presents a modification of stepped solar still with continuous water circulation using a storage tank for sea and salt water. Total dissolved solids (TDS) of seawater and salt water before desalination is 57,100 and 2370 mg/l. A comparison study between modified stepped and conventional solar still was carried out to evaluate the developed desalination system performance under the same climate conditions. The effect of installing a storage tank and cotton black absorber for modified stepped solar still on the distillate productivity was investigated. The results indicate that, the productivity of the modified stepped still is higher than that for conventional still approximately by 43% and 48% for sea and salt water with black absorber respectively, while 53% and 47% of sea and salt water, respectively with cotton absorber. Also, the daily efficiency for modified stepped still is higher than that for conventional still approximately by 20%. The maximum efficiency of modified stepped still is occurring at a feed water flow rate of 1 LPM for sea water and 3 LPM for salt water. Total dissolved solids (TDS) of seawater and salt water after desalination is 41, and 27 mg/l. © 2014 Elsevier Ltd. All rights reserved. Source

Abdullah A.S.,Tanta University
Desalination | Year: 2013

In this paper, the experimental performance of a stepped solar still coupled with a solar air-heater was investigated. A single slope passive solar still (conventional still) and stepped active solar still integrated with a solar air-heater collector were fabricated with an area of 0.5m2. The hot air from the solar air heater passes under the base of stepped still used to heat the saline water. The higher saline water temperature was achieved by the active stepped solar still compared to the passive solar still due to the additional thermal energy supplied by hot air. Use of aluminum filling as thermal storage material beneath the absorber plate keeps the operating temperature of the still high enough to produce distillated water during the lack of sunshine, particularly at night. Also, the effect of water flow over the glass cover was studied. Results showed that, water productivity increased by 112% over conventional still, when the system was coupled with a solar air-heater and glass cover cooling, for stepped solar still. The productivity of the stepped still is increased by integrating aluminum filling by about 53% over conventional still. The experimental study including the comparison between the conventional still and stepped still with improvement The hot air passes under the base of stepped still used to heat the saline water Use of aluminum filling as thermal storage material beneath the absorber plate The effect of water flow over the glass cover was studied. The productivity of stepped still with improvement increased above 120% over conventional still. © 2013 Elsevier B.V. Source

Ibrahim A.,Tanta University
Renewable and Sustainable Energy Reviews | Year: 2012

This review paper presents an appraisal of renewable energy RE options in Egypt. An appraisal review of different REs is presented. The study shows that electric energy produced from REs in Egypt are very poor compared with other energy sources. The utilization of the renewable energies can also be a good opportunity to fight the desertification and dryness in Egypt which is about 60% of Egypt territory. The rapid growth of energy production and consumption is strongly affecting and being affected by the Egyptian economy in many aspects. It is evident that energy will continue to play an important role in the development of Egypt's economy in coming years. The total installed electricity generating capacity had reached around 22025 MW with a generating capacity reached 22605 MW at the end of 2007. Hydropower and coal has no significant potential increase. During the period 1981/82-2004/05 electricity generation has increased by 500% from nearly 22 TWh for the year 1981/1982 to 108.4 TWh in the year 2004/2005 at an average annual growth rate of 6.9%. Consequently, oil and gas consumed by the electricity sector has jumped during the same period from around 3.7 MTOE to nearly 21 MTOE. The planned installed capacity for the year 2011/2012 is 28813 MW and the required fuel (oil and gas) for the electricity sector is estimated to reach about 29 MTOE by the same year. The renewable energy strategy targets to supply 3% of the electricity production from renewable resources by the year 2010. Electrical Coverage Electrical energy has been provided for around 99.3% of Egypt's population, representing a positive sign for the welfare of the Egyptian citizen due to electricity relation to all development components in all walks of life. The article discusses perspectives of wind energy in Egypt with projections to generate ∼ 3.5 GWe by 2022, representing ∼9% of the total installed power at that time (40.2 GW). Total renewables (hydro + wind + solar) are expected to provide ∼7.4 GWe by 2022 representing ∼ 19% of the total installed power. Such a share would reduce dependence on depleting oil and gas resources, and hence improve country's sustainable development. © 2011 Elsevier Ltd. All rights reserved. Source

Discover hidden collaborations