Week-3 Challenge: ADVISOR Tool

Aim :- ADVISOR Tool (Week - 3)

Objective :-

1. For EV_defaults_in file, if cargo mass is 500 kg with all other default conditions, can the vehicle travel for 45 km with FTP drive cycle? Conclude your observations.

2. In the above case, try changing the battery capacity and repeat the simulation.

3. Perform gradeability test with PRIUS_Jpn_defaults_in file

Compare your results in table and conclude.

THOERY :-

Advisor Tool -

• Created by National Laboratory for Renewable energy (NREL) and Department of Energy USA.
• It's development phase is 1994 to 2004.
• Rapid analysis of the performance and fuel economy of Conventional, Electric and Hybrid Electric vehicles.
• Use a backward flow i.e. from Driving cycle to Energy storage.
• Vehicle models are mostly experiental, relying on the drivetrain component input/output relationship measured in the laboratory.
• It is a set of models data script text files for use with Matlab and Simulink.

Benefits of using ADVISOR Tool :-

• Estimate the fuel economy of vehicles that have not yet been built.
• Compare relative tailpipe emission produced on a number of cycles.
• Evaluate an energy management strategy for your hybrid vehicle's fuel converter.
• Optimize the gear ratios in your transmission to minimize fuel use or maximize performance, etc.

Procedure to start ADVISOR tool:-

• Launch MATLAB and first set a default location folder to the advisor.
• Now in the command window of MATLAB type advisor and press enter.
• A new window will open and then set the metric as an unit for ADVISOR.
• ADVISOR Tool has total 3 nos. of window
  1) Vehicle input window
  2) simulation parameter window
  3) Result in window

PART 1 :- For EV_defaults_in file, if cargo mass is 500 kg with all other default conditions, can the vehicle travel for 45 km with FTP drive cycle? Conclude your observations.

Answer :-

• Initially, we have to select EV_defaults_in file from the drop-down menu and after selecting, the window changes from Parallel_default_in to EV_defaults_in for the Vehicle Input window. Further, it automatically changes drivetrain configuration as EV.
• Then, as per the given condition, we have changed the Cargo mass to 500 kg. A change in the total mass of the vehicle can be easily seen.
• Clicking on the continue button after that a new window called Simulation Parameter will pop up.

• In Simulation Parameter window, change drive cycle to CYC_FTP by selecting the drop-down menu. Below that, we will see no. of cycles from here we can set our drive cycle.

Drive Cycle FTP for 1 no. of cycle :-

• While going through the above graphs, we noted that for Drive Cycle FTP for 1 no. of cycle, total distance covered is 17.8 km.
• Further, we noted from the ess_soc_hist graph that state of chrage(SOC) of battery was reduced from 1 to 0.6 (i.e. From 100% to 60%) for 1 no. of drive cycle.
• Hence, distance travelled for 1 no. of drive cycle FTP is 17.8 km.

Drive Cycle FTP for 2 no. of cycle :-

• While going through the above graphs, we noted that for Drive Cycle FTP for 2 no. of cycle, total distance covered is 35.5 km.
• Further, we noted from the ess_soc_hist graph that state of chrage(SOC) of battery was reduced from 1. However, it has not reached 0 value of SOC. That means, the battery is still not fully exhausted after 2 no. of drive cycle.
• Hence, distance travelled for 2 no. of drive cycle FTP is 35.5 km. Then, we will try for 3 no. of drive cycle.

Drive Cycle FTP for 3 no. of cycle :-

• While going through the above graphs, we noted that for Drive Cycle FTP for 3 no. of cycle, total distance covered is 41.4 km.
• Further, we noted from the ess_soc_hist graph that state of chrage(SOC) of battery was reduced from 1 to 0. That means, the battery is fully exhausted after 3 no. of drive cycle. Hence, the vehicle cannot go beyond this 41.4 km. Hence, the maximum distance travelled for 3 number of drive cycle FTP is 41.4 km.
• Hence, the maximum distance travelled for `nth` number of drive cycle FTP is still the 41.4 km. For eg. we also tried changing the no. of drive cycles to 50 and see the result as below;

Conclusion :-

• From the above graphs, we conclude that for FTP drive cycle for EV_defaults_in file, the maximum distance covered by the vehicle is 41.4 km.
• Hence, as per the question, the said vehicle following FTP drive cycle cannot cover the distance of 45 km by given condition due to insufficient SOC.

PART 2 :- In the above case, try changing the battery capacity and repeat the simulation.

• In Vehicle Input window, we will change the capacity of the battery from energy storage which will be open in “#of mod V nom” describes the battery capacity, so we will change the module number of batteries from the first box and we will see that changes in voltage and weight of the battery.
• A new Simulation Parameter window will open, here we will change the drive cycle to 2 or 3, one at a time, and run the simulation.
• After completing of simulation, we will see the result window where we observe changes in distance travelled by the vehicle.
• We can repeat this simulation by changing the battery module and the drive cycle.

1] Total 2 nos. of FTP Drive Cycles :-

i) Energy storage system with 26 modules & 2 Drive Cycles :-

ii) Energy storage system with 27 modules & 2 Drive Cycles :-

iii) Energy storage system with 28 modules & 2 Drive Cycles :-

iv) Energy storage system with 29 modules & 2 Drive Cycles :-

Taking into consideration of increasing the Battery modules for total 2 nos. of FTP Drive cycles, we noted that even after increasing the battery modules, total distance covered by vehicle remains constant i.e. 35.5 km. SOC of battery is still approximately 0.3.

The table is as under;

2] Total 2 nos. of FTP Drive cycle :-

i) Energy storage system with 26 modules & 3 Drive Cycles :-

ii) Energy storage system with 27 modules & 3 Drive Cycles :-

iii) Energy storage system with 28 modules & 3 Drive Cycles :-

• Taking into consideration of above graph results for 3 nos. of FTP drive cycles, we noted that after increasing the battery module, there is an increase in distance covered by vehicle.

The table under shown is for better understanding;

CONCLUSION :-

• When we changed the battery modules for total 2 nos. of FTP Drive cycles, we noted that distance covered by the vehicle remains constant. So, we conclude that for 2 nos. of Drive cycle, changes made in the battery module is not affecting the total distance covered by the vehicle.
• For 3 nos. of FTP drive cycle, we observed that distance(km) covered by vehicle is gradually increasing when there is an increase in the battery modules.
• As per the given questions, for a vehicle to cover the distance of 45 km, we required the minimum battery capacity of 28 modules 345 Vnom voltage.

PART 3 :- Perform gradeability test with PRIUS_Jpn_defaults_in file. Compare your results in table and conclude

• In the ADVISOR tool of Vehicle Input window, select the PRIUS_Jpn_default model & select drivetrain configuration as prius_jpn. Then, Continue to the next window.
• Further, the simulation Parameter window will open & select the gradeability test and click on the grade option box, a new dialogue box will open.
• In the Grade Test Advanced options, we have to select vehicle input speed in mph and time in sec.
• In the grade option box, we can change speed or duration with respect to our simulation. Click on All system enabled.
• Click Ok and run the simulation and a Result window will open showing different results depend upon input data.

i) Speed = 30 `mph`, Time = `10s`& Cycle = CYC_UDDS :-

ii) Speed = 40 `mph`` Time = `10s`& Cycle = CYC_UDDS :-

iii) Speed = 50 `mph`` Time = `10s`& Cycle = CYC_UDDS :-

iv) Speed = 60 `mph`` Time = `10s`& Cycle = CYC_UDDS :-

Conclusion :-

While going through the above table, we noted that as soon as input vehicle speed increases, Gradeability(%) decreases gradually.