Experimental and Theoretical Investigations of Performance of Multi-Stage Solar Still Water Desalination Unit Coupled With an Evacuated Tube Solar Collector

2008 ◽  
Author(s):  
M. I. M. Shatat ◽  
K. Mahkamov ◽  
K. Johnson
Keyword(s):  
Middle East ◽  
Solar Collector ◽  
Water Desalination ◽  
World Health ◽  
Solar Still ◽  
East Region ◽  
Multi Stage ◽  
Theoretical Investigations ◽  
Evacuated Tube ◽  
Middle East Region

At present scarcity of potable and drinking water is a pressing issue in certain parts of the Middle East region. Important advances have been made in desalination technologies but relatively high capital and running costs restrict their wide application even in cases when solar energy is used. Flat-plate solar collectors mainly have been employed in the past to distill water in compact desalination systems. Currently, it is possible to replace the above collectors by more advanced evacuated tube ones, which are available on the market at a similar price. This paper describes results of experimental and theoretical investigations of the operation of a solar still desalination system coupled with a heat pipe evacuated tube collector with the aperture area of about 1.7 m2. A multi-stage solar still water desalination system was designed to recover latent heat from evaporation and condensation processes in four stages. The variation in the solar radiation (insolation) during a typical mid-summer day in the Middle East region was simulated using an array of 110 halogen flood lights covering the area of the solar collector. The synthetic brackish lab water solution was used for experiments and its total dissolved solids (TDS), electrical conductivity and pH were measured prior to and after the distillation process. The system’s operation was numerically simulated using a mathematical model based on the system of ordinary differential equations describing mass and energy conservation in each stage of the system. The experimental and theoretical values for the total daily distillate output were found to be in good agreement. The results of tests demonstrate that the system produces about 6.5 kg of clean water per day and have the distillation efficiency equal to 76%. However, the overall efficiency of the laboratory test rig at this stage of investigations was found to be low at the level of 26% and this is due to excessive heat losses in the system. The analysis of the distilled water shows that its quality is within the World Health Organization guidelines. Further research is being performed to improve the performance of the installation.

Intimate Partner Violence in the Middle East Region: A Systematic Review and Meta-Analysis

2021 ◽  
pp. 152483802110360
Author(s):  
Mozhgan Moshtagh ◽  
Rana Amiri ◽  
Simin Sharafi ◽  
Morteza Arab-Zozani
Keyword(s):  
Intimate Partner Violence ◽  
Middle East ◽  
Partner Violence ◽  
Meta Analysis ◽  
Random Effect Model ◽  
Intimate Partner ◽  
World Health ◽  
East Region ◽  
Type Of Abuse ◽  
Middle East Region

Background and Objective: Intimate partner violence (IPV) is a clinical and social problem globally, especially in the Middle East. This study aimed to analyze the prevalence of IPV and its types against women in the Middle East region. Method: PubMed, Scopus, and Web of Science were searched in January 2020. From 1995 to 2020, all studies performed in the Middle East, investigating at least one type of abuse against women and written in English, entered the study. All included studies were appraised using Joanna Briggs Institute Checklist, which was adapted for prevalence studies. The random effect model of meta-analysis was performed using the Mantel–Haenszel method by comprehensive meta-analysis software. Each type of abuse as event rate with 95% CI was calculated for each variable. Heterogeneity was investigated using the I 2 statistic test. Results: Fifty-five studies encompassing 138,692 participants were included in our meta-analysis. The rate of overall abuse was 26.3 ( n = 55, 95% CI: [15.8, 40.5], p = .002). The highest rate of abuse in the included studies was reported for psychological abuse 48.6% ( n = 46, 95% CI: [39.8, 57.5], p = .758). The rate of abuse for physical, economical, sexual, and injury were 28.4% ( n = 53, 95% CI: [22.1, 35.7], p = .0001), 19% ( n = 10, 95% CI: [9.8, 33.7], p = .0001), 18.5% ( n = 45, 95% CI: [13.6, 24.6], p = .0001), and 18.4% ( n = 5, 95% CI: [7.1, 40.2], p = 0.008), respectively. The overall abuse reported by World Health Organization Multi-Country Domestic Violence (DV)Questionnaire was 25.7% ( n = 17, 95% CI: [18.4, 34.7], p = .0001). This value was 41.8% ( n = 11, 95% CI: [29.7, 55], p = .223) for the Conflict Tactics Scale Questionnaire. Conclusion: Although this review highlights the lack of or insufficient IPV data in some contexts and inconsistencies in defining and measuring IPV among studies, the evidence shows that a moderate to high pattern of abuse has been observed in the study population. Due to this region’s unique cultural-religious characteristics, it is urgent to reduce this phenomenon.

scholarly journals Design and Energy Requirements of a Photovoltaic-Thermal Powered Water Desalination Plant for the Middle East

2021 ◽  
Vol 18 (3) ◽  
pp. 1001
Author(s):  
Saeed Alqaed ◽  
Jawed Mustafa ◽  
Fahad Awjah Almehmadi
Keyword(s):  
Renewable Energy ◽  
Middle East ◽  
Fossil Fuels ◽  
Minimum Cost ◽  
Electrical Energy ◽  
Water Desalination ◽  
Small Scale ◽  
Remote Community ◽  
East Region ◽  
Middle East Region

Seawater or brackish water desalination is largely powered by fossil fuels, raising concerns about greenhouse gas emissions, particularly in the arid Middle East region. Many steps have been taken to implement solar resources to this issue; however, all attempts for all processing were concentrated on solar to electric conversion. To address these challenges, a small-scale reverse-osmosis (RO) desalination system that is in part powered by hybrid photovoltaic/thermal (PVT) solar collectors appropriate for a remote community in the Kingdom of Saudi Arabia (KSA) was designed and its power requirements calculated. This system provides both electricity to the pumps and low-temperature thermal energy to pre-heat the feedwater to reduce its viscosity, and thus to reduce the required pumping energy for the RO process and for transporting the feedwater. Results show that both thermal and electrical energy storage, along with conventional backup power, is necessary to operate the RO continuously and utilize all of the renewable energy collected by the PVT. A cost-optimal sizing of the PVT system is developed. It displays for a specific case that the hybrid PVT RO system employs 70% renewable energy while delivering desalinized water for a cost that is 18% less than the annual cost for driving the plant with 100% conventional electricity and no pre-heating of the feedwater. The design allows for the sizing of the components to achieve minimum cost at any desired level of renewable energy penetration.

In Quest of a Second Boom

2018 ◽  
Vol 11 (1-2) ◽  
pp. 257-278 ◽  
Author(s):  
Shirzad Azad
Keyword(s):  
Foreign Policy ◽  
Middle East ◽  
Crucial Role ◽  
Gulf Cooperation Council ◽  
East Region ◽  
Personal Motivation ◽  
Policy Measures ◽  
The Republic ◽  
Middle East Region ◽  
Different Parts

In spite of her troubled presidency at home and premature, ignominious exit from power, Park Geun-hye made serious attempts to bolster the main direction of the Republic of Korea’s (ROK) foreign policy toward the Middle East. A collaborative drive for accomplishing a new momentous boom was by and large a dominant and recurring theme in the Park government’s overall approach to the region. Park enjoyed both personal motivation as well as politico-economic justifications to push for such arduous yet potentially viable objective. Although the ROK’s yearning for a second boom in the Middle East was not ultimately accomplished under the Park presidency, nonetheless, the very aspiration played a crucial role in either rekindling or initiating policy measures in South Korea’s orientation toward different parts of a greater Middle East region, extending from the Gulf Cooperation Council (GCC) to Morocco.

Regional and international strategic visions of actors In the Middle East

2019 ◽  
pp. 581
Author(s):  
Mohammed Moazaz Iskandar Al - Hadithi
Keyword(s):  
Middle East ◽  
East Region ◽  
Middle East Region

The Middle East region is of great importance in the strategic realization of regional and international actors. Therefore, the hypothesis that the research tries to prove is that the Middle East region is of great strategic importance due to the set of constituents, whether civilizational, economic or geopolitical. The emergence of different strategic visions, whether regional or international actors in the region.

US and Russian policies and strategies in the Middle East: Iraq and Syria as a model

2019 ◽  
pp. 220
Author(s):  
Esraa Aladdin Noori ◽  
Nasser Zain AlAbidine Ahmed
Keyword(s):  
Middle East ◽  
East Asia ◽  
Balance Of Power ◽  
Western World ◽  
International Conflicts ◽  
The South ◽  
The West ◽  
The North ◽  
East Region ◽  
Middle East Region

The Russian-American relations have undergone many stages of conflict and competition over cooperation that have left their mark on the international balance of power in the Middle East. The Iraqi and Syrian crises are a detailed development in the Middle East region. The Middle East region has allowed some regional and international conflicts to intensify, with the expansion of the geopolitical circle, which, if applied strategically to the Middle East region, covers the area between Afghanistan and East Asia, From the north to the Maghreb to the west and to the Sudan and the Greater Sahara to the south, its strategic importance will seem clear. It is the main lifeline of the Western world.

Turkey’s foreign policy priorities in the Middle East and Afghanistan

2020 ◽  
Vol 2020 (10-3) ◽  
pp. 228-237
Author(s):  
Marina Shpakovskaya ◽  
Oleg Barnashov ◽  
Arian Mohammad Hassan Shershah ◽  
Asadullah Noori ◽  
Mosa Ziauddin Ahmad
Keyword(s):  
United States ◽  
Foreign Policy ◽  
Middle East ◽  
The United States ◽  
Turkish Foreign Policy ◽  
Security Issues ◽  
New Approaches ◽  
East Region ◽  
History Of ◽  
Middle East Region

The article discusses the features and main approaches of Turkish foreign policy in the Middle East. Particular attention is paid to the history of the development of Turkish-American relations. The causes of the contradictions between Turkey and the United States on the security issues of the Middle East region are analyzed. At the same time, the commonality of the approaches of both countries in countering radical terrorism in the territories adjacent to Turkey is noted. The article also discusses the priority areas of Turkish foreign policy, new approaches and technologies in the first decade of the XXI century.

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