Engineering and Applied Sciences

Volume 4, Issue 2, April 2019

  • Numerical Simulation of Centrifugal Pump and Effect of Impeller Geometry on Its Performance

    Mohamed Hassan Gobran, Mostafa Mohamed Ibrahim, Ramy Elsayed Shaltout, Mahmoud Ahmed Shalaby

    Issue: Volume 4, Issue 2, April 2019
    Pages: 21-29
    Received: Apr. 02, 2019
    Accepted: May 15, 2019
    Published: Jun. 04, 2019
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    Abstract: In the presented paper, the effect of impeller geometric parameters on the performance of centrifugal pump has been investigated. This study was performed for different flow rates and rotational speeds, allowing to obtain the performance curve for the centrifugal pump. Three dimensional computational fluid dynamic simulation of the impeller and vol... Show More
  • Economic Life Cycle versus Lifespan – A Case Study of an Urban Bus Fleet

    Hugo Raposo, José Torres Farinha, Inácio Fonseca, Diego Galar

    Issue: Volume 4, Issue 2, April 2019
    Pages: 30-43
    Received: Oct. 17, 2018
    Accepted: Nov. 07, 2018
    Published: Jun. 10, 2019
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    Abstract: The maintenance policy and the quality of service throughout the bus’s life cycle can be measured through their costs along time that, when evaluated using Lifespan or Economic Life Cycle methods, allow to determine the renewal or the replacement time. The paper discusses these two models, using real data from an urban bus fleet company. The maths ... Show More
  • Integration and Evaluation of the Impact of Distributed Generation on the Protection System of Distribution Network with DG Using Etap

    Modu Abba Gana, Usman Otaru Aliyu, Ganiyu Ayinde Bakare

    Issue: Volume 4, Issue 2, April 2019
    Pages: 44-51
    Received: Feb. 28, 2019
    Accepted: May 09, 2019
    Published: Jun. 12, 2019
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    Abstract: Distributed Generation (DG) has been growing rapidly in deregulated power systems due to their potential solutions to meeting localized demands at distribution level and to mitigate limited transmission capacities from centralized power stations. Penetration of DG into an existing distribution system has so many impacts on the system. Despite the b... Show More