The Final Project. About.. Help me Guys...

I am a student in Suleyman Demirel University, Energy Systems Engineer. I have a final project this year. This project about “ Flooded Evaporator with Freezer Room”. We have got 30 HP Bitzer Semi-Hermetic Recips 2 Stage Compressors with -43 celsius degree / +40 celsius degree liquid evaporator cycle but I need some questions;

1- How is a flooded evaporator need this system ?

2- How to determine measure ring about with this floded evaporator?

3- How to determine tank volume?

4- For this room, I need complute all equipments also refrigerant (for R-404A) and connection shape, draw, photograph?

This Project is very important for me. Please help me. If you can help me I will very happy.