Possibility to Develop a Bike - Sharing System in Ho Chi Minh City
Issue:
Volume 2, Issue 4, December 2016
Pages:
35-41
Received:
3 July 2016
Accepted:
20 October 2016
Published:
21 November 2016
DOI:
10.11648/j.ijtet.20160204.11
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Abstract: This study aims to discuss the possibility of developing a public bike – sharing system in Ho Chi Minh City, Viet Nam (HCMC). It focuses on two key issues: first are the advantages and disadvatages of promoting the use of bicycles and district 1, the central district of Ho Chi Minh City in implementing a bike - sharing system, and second are a number of solutions to address existing challenges regarding the development of this system. This study employs three methods: survey, in-depth interview and observation. The findings present seven advantages and five disadvantages in promoting the bike-sharing system and three solutions for improving the conditions of District 1 in adopting this system.
Abstract: This study aims to discuss the possibility of developing a public bike – sharing system in Ho Chi Minh City, Viet Nam (HCMC). It focuses on two key issues: first are the advantages and disadvatages of promoting the use of bicycles and district 1, the central district of Ho Chi Minh City in implementing a bike - sharing system, and second are a numb...
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Hybrid Propulsion Testing using Direct-Drive Electrical Machines for Super Yacht and Inland Shipping
Johannes J. H. Paulides,
Nenad Djukic,
Johannes A. de Roon,
Laurentiu Encica
Issue:
Volume 2, Issue 4, December 2016
Pages:
42-48
Received:
31 August 2016
Accepted:
31 October 2016
Published:
25 November 2016
DOI:
10.11648/j.ijtet.20160204.12
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Abstract: Hybrid or full electric propulsions for inland ships are becoming more popular. In these application, direct-drive PM propulsion motors are a preferred machine configuration. This paper discusses the challenges to determine the losses, as estimated with simulations, during the testing procedures of a 350kW at 300rpm, respectively. The full-load testing of the drive system is performed by mechanically coupling two identical machines, of which one operates as a motor and the other as a generator, or “back-to-back” testing configuration. Two Direct-Drive PM machines have been manufactured to validate key findings from the modelling, particularly in terms of loss predictions, thermal modelling and influence of the design features such as magnet segmentation. A back-to-back set-up is created for testing these machines with a speed range of 0-450 rpm. Before the measurement commended, tests were carried out in accordance with IEC60034-1, IEC60034-15, IEC60085-1, IEEE43, IEEE118 and Lloyd's register. These tests included: surge, resistance, winding symmetry, high voltage test, insulation resistance and polarization index. All these tests were successfully completed and agreed with the analysis as described before. Following the motors have been installed in an inland ship hybrid propulsion.
Abstract: Hybrid or full electric propulsions for inland ships are becoming more popular. In these application, direct-drive PM propulsion motors are a preferred machine configuration. This paper discusses the challenges to determine the losses, as estimated with simulations, during the testing procedures of a 350kW at 300rpm, respectively. The full-load tes...
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The Research and Practice in Long Tunnel Fan Remote Control Technology
Issue:
Volume 2, Issue 4, December 2016
Pages:
49-54
Received:
13 October 2016
Accepted:
18 November 2016
Published:
20 December 2016
DOI:
10.11648/j.ijtet.20160204.13
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Abstract: This paper represents a new long tunnel fan remote control system which is designed for the current shortcoming in tunnel construction by using manual control of the fan. This system has advantages of centralized control, automatic intelligent, strong compatibility, easy maintenance, long distance communications, and low environmental requirements. It has been successfully deployed in Chengdu Railway Yuelongmen tunnel and was compatible with tunnel hydrogen sulfide gas monitoring system docking, automatically adjusting the fan speed according to the hole concentration of hydrogen sulfide gas, achieving good economic effect and ensuring construction safety. The system represented in this paper is a solution to the Long Tunnel Ventilation centralized management of automated intelligence.
Abstract: This paper represents a new long tunnel fan remote control system which is designed for the current shortcoming in tunnel construction by using manual control of the fan. This system has advantages of centralized control, automatic intelligent, strong compatibility, easy maintenance, long distance communications, and low environmental requirements....
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Assesment of Marine Propulsion System Reliability Based on Fault Tree Analysis
Tran Van Ta,
Nguyen Hoai Vu,
Ma Anh Triet,
Doan Minh Thien,
Vo Trong Cang
Issue:
Volume 2, Issue 4, December 2016
Pages:
55-61
Received:
17 August 2016
Accepted:
22 November 2016
Published:
12 January 2017
DOI:
10.11648/j.ijtet.20160204.14
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Abstract: Research on reliability to ensure that the operation of transport facilities is safe. This issue is always concerned by transportation operators. This article presents a number of research using Fault Tree Analysis method (FTA) to model the analysis, marine propulsion system reliability assessment.
