modeFRONTIER as a design tool for
compressors suction systems
Tool flexibility evaluation
Talita Wajczyk
Embraco
PRESENTATION TOPICS
• Company Overview (2-3 minutes);
• Problem Description;
• Methodology;
• Goals;
• Conclusion and next steps.
Customer
view
Problem description
• Suction System
Inside the
compressor
Compressor
systems
Suction
System
Valve
• Objectives:
– COP and Capacity maximization;
• Parameters evaluated:
– Valve thickness (T_hi);
– Valve profile (rigidez);
– Port diameter (T_bd);
– Length and diameters: tube and chambers;
Problem description
Thickness Profile Port
diameter
Problem description
• Tool flexibity
– Combine diferents codes and applications inside
modeFRONTIER main;
• MATLAB Code:
– Simulates the compression process and valve dynamics;
• Mathcad sheet:
– Evaluates Stiffness and Mass Matrices;
• Visual Basic:
– Encapsulates Mathcad sheet.
• DOS Batch set up
MATLAB file
execution:
Valve dynamics and
compression process
Problem description
Goals
• Matrix correlation:
– Strong correlation
between T_bd and COP
and CAP objectives;
- Negative correlation:
CAP vs T_ht
Goals
• Scatter plot:
– Capacity vs COP;
– Color: Stiffness;
– Size: Port diameter;
– X ΔRange: 35W;
– Y ΔRange: 0.23 W/W;
Port
diameter
Goals
Rigidez T_ht T_bd CAP COP
• Parallel Coordinates:
– Tool for choose points
according variables limits
and goals;
– Excellent when many
solutions are generated.
Conclusion and next steps
• modeFRONTIER is an excellent tool for preliminary project
analysis and optimization;
• Good tool to analyze interactions effects between variables
and objectives;
• It allows with great facility an integration with many kind of
codes and applications, reducing the design time;
• The range obtained for each variable for this problem shows
the benefits of this tool for suction system design.