Morphology of the Nile River due to a Flow Rate over the Maximum Current: Case Study Damietta Branch

2017 ◽  
pp. 239-257 ◽  
Author(s):  
Abdelazim Negm ◽  
Tarek M. Abdel-Aziz ◽  
Mohamed N. Salem ◽  
Wessam Yousef
Keyword(s):  
Flow Rate ◽  
Nile River ◽  
Current Case ◽  
Maximum Current

Pyrolysis of brown algae (Bifurcaria Bifurcata) in a stainless steel tubular reactor: From a review to a case study

2018 ◽  
Vol 14 (1) ◽  
pp. 31-60 ◽  
Author(s):  
M. Y. Guida ◽  
F. E. Laghchioua ◽  
A. Hannioui
Keyword(s):  
Particle Size ◽  
Stainless Steel ◽  
Flow Rate ◽  
Brown Algae ◽  
Tubular Reactor ◽  
Nitrogen Flow ◽  
Nitrogen Flow Rate ◽  
Bifurcaria Bifurcata ◽  
Bio Oil

This article deals with fast pyrolysis of brown algae, such as Bifurcaria Bifurcata at the range of temperature 300–800 °C in a stainless steel tubular reactor. After a literature review on algae and its importance in renewable sector, a case study was done on pyrolysis of brown algae especially, Bifurcaria Bifurcata. The aim was to experimentally investigate how the temperature, the particle size, the nitrogen flow rate (N2) and the heating rate affect bio-oil, bio-char and gaseous products. These parameters were varied in the ranges of 5–50 °C/min, below 0.2–1 mm and 20–200 mL. min–1, respectively. The maximum bio-oil yield of 41.3wt% was obtained at a pyrolysis temperature of 600 °C, particle size between 0.2–0.5 mm, nitrogen flow rate (N2) of 100 mL. min–1 and heating rate of 5 °C/min. Liquid product obtained under the most suitable and optimal condition was characterized by elemental analysis, 1H-NMR, FT-IR and GC-MS. The analysis of bio-oil showed that bio-oil from Bifurcaria Bifurcata could be a potential source of renewable fuel production and value added chemicals.

A Leadership Approach for the New Millennium: A Case Study of UCLA's Bruin Leaders Project

NASPA Journal ◽  
2001 ◽  
Vol 38 (2) ◽  
Author(s):  
Charles L. Outcalt ◽  
Shannon K. Faris ◽  
Kathleen N. McMahon ◽  
Philip M. Tahtakran ◽  
Christopher B. Noll
Keyword(s):  
Social Development ◽  
Student Development ◽  
Research University ◽  
Leadership Theory ◽  
Public Research ◽  
Current Case ◽  
Leadership Model ◽  
Public Research University ◽  
New Millennium

The current case study investigates the application of a non-hierarchical leadership model at an urban public research university. Following a review of recent contributions to leadership theory, especially with regard to student development, the authors balance discussions of the values on which the program under review is based with descriptions of the practical structure of the program. In addition, they suggest means by which other campuses can tailor this program to their resources, opportunities, and needs. The case study concludes with a discussion of the program’s effect on students’ cognitive and social development.

scholarly journals Thermal Efficiency and Economics of a Boil-Off Hydrogen Re-Liquefaction System Considering the Energy Efficiency Design Index for Liquid Hydrogen Carriers

Energies ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4566
Author(s):  
Minsoo Choi ◽  
Wongwan Jung ◽  
Sanghyuk Lee ◽  
Taehwan Joung ◽  
Daejun Chang
Keyword(s):  
Flow Rate ◽  
Life Cycle Cost ◽  
Specific Energy Consumption ◽  
Liquid Hydrogen ◽  
Efficient Design ◽  
Fuel Cell Stack ◽  
Energy Efficiency Design Index ◽  
The Cost ◽  
Large Flow

This study analyzes the thermodynamic, economic, and regulatory aspects of boil-off hydrogen (BOH) in liquid hydrogen (LH2) carriers that can be re-liquefied using a proposed re-liquefaction system or used as fuel in a fuel cell stack. Five LH2 carriers sailing between two designated ports are considered in a case study. The specific energy consumption of the proposed re-liquefaction system varies from 8.22 to 10.80 kWh/kg as the re-liquefaction-to-generation fraction (R/G fraction) is varied. The economic evaluation results show that the cost of re-liquefaction decreases as the re-liquefied flow rate increases and converges to 1.5 $/kg at an adequately large flow rate. Three energy efficient design index (EEDI) candidates are proposed to determine feasible R/G fractions: an EEDI equivalent to that of LNG carriers, an EEDI that considers the energy density of LH2, and no EEDI restrictions. The first EEDI candidate is so strict that the majority of the BOH should be used as fuel. In the case of the second EEDI candidate, the permittable R/G fraction is between 25% and 33%. If the EEDI is not applied for LH2 carriers, as in the third candidate, the specific life-cycle cost decreases to 67% compared with the first EEDI regulation.

scholarly journals Energy Balance in Wastewater Systems with Energy Recovery: A Portuguese Case Study

2021 ◽  
Vol 6 (10) ◽  
pp. 141
Author(s):  
Catarina Jorge ◽  
Maria do Céu Almeida ◽  
Dídia Covas
Keyword(s):  
Energy Efficiency ◽  
Energy Balance ◽  
Energy Recovery ◽  
Real Life ◽  
Wet Season ◽  
Current Case ◽  
Total Input ◽  
Wastewater Systems ◽  
Regional Reference

This paper presents and discusses the application of a novel energy balance scheme for assessing energy efficiency in wastewater systems. The energy balance is demonstrated with a Portuguese real-life case study, using mathematical modelling to estimate the different energy components and to compute two energy efficiency indices. The total inflow intrinsic energy can represent a significant amount (>95%) of the total energy used in systems mainly composed of gravity sewers. The total input energy is significantly (four-times) higher in the wet season than in the dry season, mostly due to undue inflows (e.g., direct rainfall and infiltration). The potential for energy recovery strongly depends on the available head and flow rate at the delivery point, being 0.01 kWh/m3 in the current case, with a project payback period of 4 years. The energy balance components and the respective energy efficiency indices strongly depend on the considered reference elevation. Thus, a unique regional reference elevation is recommended in the calculations.

scholarly journals A Case Study of International Students’ Social Adjustment, Friendship Development, and Physical Activity

2018 ◽  
Vol 8 (1) ◽  
Author(s):  
Shuang Li ◽  
Sam Zizzi
Keyword(s):  
Physical Activity ◽  
International Students ◽  
Social Adjustment ◽  
Physical Activities ◽  
Cultural Barriers ◽  
Social Aspect ◽  
Activity Data ◽  
Current Case ◽  
Friendship Development

Previous literature has focused on international student’s social transition and monocultural and bicultural ties. Little research has explored international students’ multicultural friendship development and the role that physical activity plays in their social interaction. The current case study explored a group of international students’ friendship development and the social aspect of physical activity. Data from individual interviews (pre and post), and 5 months of participant observations was used to describe two female international students’ experiences. Results suggested international students faced both language and cultural barriers in their social interactions with American students. Engagement in physical activities served as the context where observations of peer-to-peer social behaviors happened. Researchers argued that the multicultural friendship developed and strengthened by engaging in these physical activities. This paper also discussed implications and limitations of the study as well as future recommendations.    

scholarly journals Manufatura enxuta em um fabricante de produtos hospitalares: implantação e avaliação na percepção dos gestores

2019 ◽  
Vol 12 (1) ◽  
pp. 88
Author(s):  
Rogério Da Silva Nunes ◽  
Alessandra De Linhares Jacobsen ◽  
Rodrigo Dos Santos Cardoso
Keyword(s):  
Change Management ◽  
Behavioral Change ◽  
Lean Manufacturing ◽  
Implementation Process ◽  
Readiness For Change ◽  
Current Case ◽  
Medical Products ◽  
Increase Productivity ◽  
A Company

The use of lean production in organizations, which aims to broaden your results using fewer resources, that is, to increase productivity producing essentially necessary and eliminating what does not add value to clients, requires actions that include mapping of success environments and organization's readiness for change management. Hence we have the current case study, descriptive, which presents the implementation of lean manufacturing in the textile plant in Blumenau (Santa Catarina) that manufactures medical products from a company with three manufacturing units. Next, there were interviews with thirteen managers and staff who participated in the lean manufacturing implementation process in the unit in focus. As a result, we identified that the requirements and preparations for the deployment mentioned are directed to a behavioral change that includes preparation of leadership, aligned with the organization's strategy, which needs to be deployed to all areas. Also featured are the stages of implementation and attempts to institutionalize the environment provided by the principles of lean manufacturing. It concludes with the identification of categories of analysis for the changes arising from the aforementioned deployment.

scholarly journals ANALYSIS OF EVAPORATOR EFFECTIVENESS ON 1/2 CYCLE REFRIGERATION SYSTEMS: A CASE STUDY ON LPG FUELED VEHICLES

2020 ◽  
Vol 82 (3) ◽  
Author(s):  
Muji Setiyo ◽  
Budi Waluyo ◽  
Nurkholis Hamidi
Keyword(s):  
Heat Transfer ◽  
Mass Flow Rate ◽  
Mass Flow ◽  
Flow Rate ◽  
Exchange Process ◽  
Cooling Curve ◽  
Heat Exchange Process ◽  
Heat Transfer Capacity ◽  
The Ideal

The ½ cycle refrigeration system on LPG fueled vehicles has a significant cooling effect. However, the cooling is very dependent on the heat exchange process in the evaporator. Therefore, this paper analyses the deviation of the actual cooling curve from the ideal scenario carried out on a laboratory scale. The analytical method used is the calculation of the effectiveness of the evaporator, which compares the actual to the potential heat transfer capacity. The LPG flow rate was varied from 1-6 g/s, while the evaporation pressure ranged between 0.05, 0.10, and 0.15 MPa, which applied to compact type evaporators with dimensions of 262 ´ 200 mm, with a thickness of 65 mm. The research results confirm that the higher the LPG mass flow rate, the lower the heat transfer effectiveness. At the higher LPG mass flow rate, heat transfer occurs less optimally,  due to incomplete evaporation of LPG in the evaporator.

Nile River Bathymetry by Satellite Remote Sensing Case Study: Rosetta Branch

2017 ◽  
pp. 259-274 ◽  
Author(s):  
Abdelazim Negm ◽  
Saleh Mesbah ◽  
Tarek Abdelaziz ◽  
Omar Makboul
Keyword(s):  
Remote Sensing ◽  
Satellite Remote Sensing ◽  
Nile River
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