just the liquid cooled motor part
Microsoft Word - Project2-SEM300-T1-2020_V1.docx SEM300 - PROJECT WEEK 6-11 SEM300 Thermo-Fluid Design (2019) Project – Thermal Management of the ASCEND Solar Car (20% + 60% of the total assessment of the unit) The World Solar Challenge starts in Darwin in the Northern Territory and travels the Stuart Highway to Port Augusta and then via Highway 1 to finish in the City of Adelaide in South Australia (approximately 3000 kms). Deakin University has partnered with Acciona to participate in the cruiser class of this event in 2021. The design of the car is still in progress, but previous student generations have provided important design choices. The car is powered by two electric motors on the rear axles. The motor is the EMRAX 188, which has a peak power output of about 50kW. It uses a 40kWh pack using 2170 cells manufactured by Prohelion. The power is produced by 5 m2 of Sunpower Maxeon 3 Cells. As part of SEM300, you are now tasked to design the thermal management of the car. You will do this in two stages: 1) The conceptional design, due on 4 May 2020 (20% of the final grade, team grade) 2) The final design, due on 8 June 2020 (60% of the final grade, half team grade, half individual grade) Your team is required to design the following heat-management systems: Motor Cooling: While the current motor is the air-cooled version EMRAX 188 (IP21), you need to propose two design options to cool the motor: one air-cooled solution and one liquid cooled solution using the EMRAX 188 (IP65). Additionally, you need to provide a solution for one of the two following challenges: 1. Passenger Cooling: To save energy, no air conditioner will be onboard the car. Hence, all passenger cooling needs to come from the environmental air. 2. Battery Cooling: to prevent overheating of the onboard batteries, a cooling system is required. The battery consists of 38 packs of Prohelion Batteries, each using 88 LG INR18650MJ1 batteries. The batteries emit up to 0.9W each during discharge. SEM300 - PROJECT WEEK 6-11 In general, you should approach this assignment as if your team is bidding for a subcontract to the design the heat management systems. You will conduct this assignment in two phases: 1. Conceptional Design (due on 04 May 2020, 9am): The conceptional design includes general analysis of the issues regarding the thermal management, proposes solutions to solve them and includes initial calculations on the feasibility of the designs. Your conceptional design should at least contain: • Air-Cooled Motor Cooling Solution: o How much airflow is required for the cooling? o How do you route the air? o What is the power requirements to obtain the airflow? Do you use ram air, a fan or both? • Liquid-Cooled Motor Solution: o How much liquid flow do you need? What kind of liquid do you use? o What is the approximate size of the radiator? o Where do you install it and how do you ensure sufficient airflow? o What is the pump requirement? • Passenger Cooling: o At what rate do you expect the cabin to heat up? o What kind of airflow do you need to reduce the temperature? o Where would you locate the fans? • Battery Cooling: o How would you cool the battery? Air-cooled or liquid-cooled? o How do you ensure sufficient air/liquid flow to achieve the cooling? Note that you need to support your designs with initial calculations. Detailed descriptions of the off- the-shelf components and the CAD files for the current status of the design are available. We encourage unusual, innovative designs and there is a special rubric honoring innovation. You do not need to have detailed CAD designs at this stage, but conceptional drawings are required. The grading will be conducted with the following weightings: Deliverables Weight Air Cooled Initial Design 25 Liquid Cooled Initial Design 25 Battery or Cabin Initial Design 25 Innovation 10 Report (Form) 5 Presentation (Form) 5 Team Management 5 Total 100 2. Final Design (due on 8 June 2020, 9am) : The final design will intensify your initial designs (or redo them entirely, if you feel like your initial design is not worth pursuing.) and will include more detailed calculations, CAD designs and Computational Fluid Dynamics (CFD) simulations. We will provide more tools to you in the studios in the coming weeks.