Online Thermodynamics Property Evaluator

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Online Thermodynamics Property Evaluator
Is it accurate ?
What is the evaluator?
How to use it ?

• A web base application used to calculate
  thermodynamics property.
• It can calculate 3 types of substance
• Ideal Gas
• Incompressible substance
• Compressible substance
• The calculation algorithm is made in
• JavaScript using an existing Matlab code
• as a guide.
• The evaluated properties.
• Temperature
• Pressure
• Specific Volume
• Internal Energy
• Enthalpy
• Entropy
• The evaluator URL is at Prof. Somertons

Known properties Temperature/ Pressure Entropy/ Pressure Specific Volume/ Temperature Specific Volume/ Pressure Pressure/ Enthalpy
Temperature(K) 200 199.9924 200 199.992 199.9997
Pressure(kPa) 50 50 50.002 50 50
Internal Energy(kJ/kg) -67.8718 -67.8763 -67.8718 -67.8766 -67.872
Specific Volume(m3/kg) 1.1479 1.1479 1.1479 1.1479 1.1479
Enthalpy(kJ/kg) -95.9965 -96.0032 -95.9965 -96.0036 -95.9965
Entropy(kJ/kgK) 5.2003 5.2003 5.2003 5.2003 5.2003
Internal Test Result for Ideal Gas

• Result produced for different known properties
  have
• very small differences.

Web Matlab error
Temperature(K) 200 200 0
Pressure(kPa) 50 50 0
Internal Energy(kJ/kg) -67.87 -67.87 0
Specific Volume(m3/kg) 1.1479 1.1479 0
Enthalpy(kJ/kg) -96 -96 0
Entropy(kJ/kgK) 5.2003 5.2003 0
Graphical User Interface (GUI)
Comparison Between Matlab and Online Evaluator

• Result produced by Matlab and Online evaluator
  are the same with no error.

Name Mohd Shuhaimi Mokhtar Adviser Dr. Craig
Somerton Date August 2, 2007
Main Page GUI
Ideal Gas GUI