Design and energy efficiency analysis of a pure fuel cell vehicle for Shell eco racer

Abstract

Summary The target of Shell Eco‐marathon competition of vehicle is to drive a fixed distance with the lowest quantity of fuel. To win the competition, the fuel cell‐powered propulsion system needs to be ultra efficient since the fuel cell system and transmission system are the key effects on the performance of the fuel cell‐powered propulsion system. In this study, a high‐efficiency fuel cell propulsion system has been designed and integrated in a prototype vehicle to participate the Shell Eco‐marathon Asia 2018 race. To achieve that, the vehicle dynamic is modeled to make the selection of the key components, and some experiments have been conducted to obtain the properly vehicle driving strategy. Based on the results of vehicle dynamic analysis, a high specific power proton‐exchange membrane fuel cell (PEMFC) stack with 1000 W and a high‐performance direct current (DC) brushless motor (1000 W) are selected to build the propulsion system of the Shell Eco‐marathon vehicle. Based on the experimental result, the racing time (1300‐1440 seconds) and varied range of racing speed (23‐27 km/h) are selected as the driving strategy. Finally, the efficiency of the fuel cell‐powered vehicle is analyzed. In the race at the year of 2018, the designed vehicle won the first place.

Energy quality factor and exergy destruction processes analysis for chemical looping hydrogen generation by coal

“…The specific optimization content is shown in Table 2. The Fe 2 O 3 cycle ratio and the steam input ratio in SR are defined as Equations (1) and (2), respectively. Based on the results of the above system optimization, the assumptions of the system simulation are shown in Table 3 Coal has an input of 1 kg/s.…”

“…Hydrogen not only has numerous sources, but also is a significant raw material for industries such as petrochemical, fuel cell, metallurgical industry, etc. 1,2 Moreover, hydrogen can be a bridge between renewable energy and traditional fossil energy due to its good storage and transportation characteristics. 3 As a carbon-free energy, hydrogen is also of great significance in reducing greenhouse problems.…”

“…Hydrogen is a clean and efficient secondary energy carrier and has the highest energy ratio in all man‐made energy sources. Hydrogen not only has numerous sources, but also is a significant raw material for industries such as petrochemical, fuel cell, metallurgical industry, etc 1,2 . Moreover, hydrogen can be a bridge between renewable energy and traditional fossil energy due to its good storage and transportation characteristics 3 .…”