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Feasibility Study and Conceptual Design of Solar Energy Source for Surface Train System
, M.Sc. Thesis Sharif University of Technology ; Durali, Mohammad (Supervisor)
Abstract
Advancements in solar powered systems bring about the possibility for today’s transportation systems to be operated and driven by such a clean and renewable source of energy. The challenging point of this combination is to draw high power levels from such a low power density source of energy. As a result, employing an efficient power storage and management system becomes inventible. The subjects of this research are to design a grid connected system and evaluate its performance and feasibility in a real application (Tehran- Mehrshahr surface train – Tehran 5th Metro Line). The task includes sixteen pairs of DC transmission lines which are powered by CIGS solar module technology and four...
Mechanical Design and Fabrication of a Parallel Hybrid Vehicle Powertrain Simulator
, M.Sc. Thesis Sharif University of Technology ; Saadat Foumani, Mahmoud (Supervisor)
Abstract
In this research, the mechanical section of a reduced-scale hybrid vehicle simulator was designed and fabricated. In order to scale down the vehicle dynamics, a method based on dimensional analysis was proposed. An internal combustion engine and an electric motor were selected as power sources and then, scaling was performed, according to the specifications of the combustion engine. Afterwards, the power transmission system was designed first in concept and then in more detail. Finally, the design was manufactured and assembled. The study was made in conjunction with another study responsible for the controlling section of the work, conducted by Safabakhsh The sponsor of these two researches...
Design and Fabrication of Control Part of a Parallel Hybrid Vehicle Powertrain Simulator
, M.Sc. Thesis Sharif University of Technology ; Saadat Foumani, Mahmoud (Supervisor)
Abstract
Nowadays, hybrid electric vehicles get more attention, not only for decreasing fossil fuel resources, but also for increasing environmental pollution. Using multi-propulsion system in hybrid vehicles causes, the low efficient performance of combustion engine is reduced compare to conventional vehicles. Fuel consumption and pollution that reduced in hybrid vehicles is related to how the multi-propulsion system works. Some researches that have been done about hybrid control algorithms, are completely software modeling and development. Despite importance of these researches in development and evaluation of power distribution algorithms, hardware-based evaluations are also necessary. In all...
Cellular layout design using Tabu search, a case study
, Article RAIRO - Operations Research ; Volume 53, Issue 5 , 2019 , Pages 1475-1488 ; 03990559 (ISSN) ; Ahadi, K ; Sharif University of Technology
EDP Sciences
2019
Abstract
This paper presents a facility layout design for a cellular manufacturing system (CMS), with the automated guided vehicles (AGVs) as the transportation device, to minimize the total material handling costs. A new concept of assigning the workstations to the non-overlapping closed zones, by which independent AGVs are allocated for internal transfer of materials/parts in each zone, is proposed. To handle this problem, a mathematical programming model is developed. The problem has been shown to be NP-hard. This computational difficulty has led us to consider suboptimal solutions generated by a Tabu search with three algorithmic variants. To evaluate the efficiencies of these algorithms, an...