Week3

 

17^TH February 2023

 Aim for Week 3:

1. Improved original hydrogen consumption calculation.

2. Build EMS rule for specific hydrogen train. 

3. Develop EMS code.

Actions for Week 3:

 For a more rigorous calculation, according to the chemical equation:

      for the calorific value of hydrogen combustion, the heat required for the complete combustion of 1 kg of hydrogen is obtained.

Secondly, According to the reading reference, we can get: η₁ fuel cell combustion efficiency is about 49.5%, η₂ DC conversion when the efficiency is about 91%, remove the train air conditioning, lights and other equipment power supply for the train on wheels energy conversion efficiency is about η₃ = 77%.In the end, we just need to select the train and get the total energy requirement by simulation to calculate the hydrogen consumption by 

  With the help of the reference online and the flow chart for calculating the hydrogen consumption, we finished writing the codes for calculation and successfully got the desired figure for the consumption. Besides, we read some articles on EMS simulation with trains and hydrogen fuel, which provided some references. The construction of the EMS system was completed and the system is shown below.

  Basically, we achieved basically all of the control of the EMS, leaving the calibration of the battery capacity and the accuracy of the feedback to be solved only.

          There are still some problems we face. 

           1.  The EMS code for power feedback regulation is not very well developed. When there is no power output from the train, the hydrogen fuel cell will still power the battery, which will consume more hydrogen than we want to see.

            2.  The combination of the code for hydrogen consumption and the EMS code is still problematic and sometimes buggy.

            3. The size of the battery capacity need to be manually entered.

   Aims for Next week:

  We expected that in week 4, we can complete the whole project including some ending parts of work.