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Central University of Technology

Design and performance analysis of renewable energy powered electric TUK-TUK battery charging stations in South Africa. Central University of Technology. Energy Postgraduate Conference 2013. Presentation outline. Introduction Charging standards overview Vehicle analysis and electrical load

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Central University of Technology

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  1. Design and performance analysis of renewable energy powered electric TUK-TUK battery charging stations in South Africa Central University of Technology Energy Postgraduate Conference 2013

  2. Presentation outline • Introduction • Charging standards overview • Vehicle analysis and electrical load • Renewable resources assessment • System configuration and component costs • Simulation results and discussion • Conclusion

  3. Introduction • Rapid and unplanned expansion many cities in developing countries has led the local population to adapt their means of transport: • Tuk-Tuk: • Advantages:The design and operation mode of these vehicles are cost-effective and well suited to narrow and ill-conditioned roads. • Problems: Costs, Environmental impacts, Spare parts. • Electric Tuk-Tuk: The proposed solution is to substitute the Tuk-tuk’s combustion engine with electric motors supplied by batteries. • In this paper the use of electric Tuk-tuk is proposed with the emphasis on the electrical design of the corresponding battery charging station powered by renewable energy such as Wind or PV systems in conjunction with a battery storage system.

  4. Charging station standard overview • The charging levels 1 to 3 are related to the typical charging power. • The charging modes 1 to 3 are linked to the amount of protection of the socket-outlet; as well as to the conversion from the AC main power to DC high voltage. Mode 4 defines DC charging using an external battery charger as well as battery switching. • Level I - Mode 4 is suitable to the remote areas not served by the grid and can be used in this study.

  5. Vehicle analysis and electrical load TUK-TUK general description Battery general description In this case the load is 1.3kW peak and 5.3kWh energy consumption per day.

  6. Renewable resource assessment

  7. System Layout • System layout • Components costs

  8. Simulation results and discussion The simulations are performed using HOMER for each hour on a yearly basis. • Case 1: One Tuk-tukcharged (8 hours) • Day charging with renewable • Corresponding Diesel Generator Diesel generator emissions • Night charging with renewable energy

  9. Case 2: Several Tuk-tukscharged (24 hours) • Renewable energy options • Corresponding Diesel Generator • Results summary

  10. Conclusion This paper has investigated the possibility of using renewable energy source such as Wind or Photovoltaic systems for the development and deployment of electric Tuk-tuk battery charging station in the rural and isolated areas of the South Africa. Different configurations have been simulated under two main strategies for operating the charging station. The main criteria of selection were the total net present cost, the cost of energy and the capacity shortage. For the case of a selected location, the simulation results have showed that the best operating scenario is to charge several vehicles consecutively by using the station at is full capacity for the whole day or 24hours non-stop. The results of this study can be used as a tool for the development of stand-alone charging stations for electric vehicle powered by renewable energy sources in the remote areas of South Africa and other isolated areas in the world, where renewable energy resources are available.

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