DEVELOPMENT OF FUNDAMENTAL EQUATION OF STATE FOR THERMODYNAMIC PROPERTIES OF 2,3,3,3- TETRAFLUOROPROPENE AND TRANS-1,3,3,3- TETRAFLUOROPROPENE USING SIMULTANEOUS OPTIMIZATION

• Main Author: Harrison, Richard
• Format: Theses
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/47405
• Institution: Institut Teknologi Bandung

Depletion of the ozone layer is a result of environmental damage which has an adverse effect on humanity. The use of chemical compounds from organic CFCs (chlorofluorocarbons) is one of the main factors in depletion of the ozone layer. The use of CFCs is widely used as a refrigerant in air conditioning systems. R-134a refrigerant provides a solution to prevent ozone layer depletion. Regulations limit the level of ozone depletion potential (ODP) and global warming potential (GWP) of refrigerants. The application of 2,3,3,3-tetrafluoropropene (R-1234yf) and trans-1,3,3,3-tetrafluoropropene (R-1234ze(E)) refrigerants in the air conditioning system is an alternative solution for R-134a refrigerant. Both of these refrigerants have ozone depletion potential of 0 and low global warming potential and thermodynamic properties very similar to R-134a. Experimental data and information on the available thermodynamic properties for R-1234yf and R-1234ze(E) refrigerants are very limited at present. One way to obtain information on the thermodynamic properties of R-1234yf and R-1234ze(E) using equation of state. The equation of state developed in this study use the hemholtz equation. The hemholtz equation of state’s in this study is able to predict information on thermodynamic properties with good accuracy over a wide range. The Development of equation of state R-1234yf and R-1234ze(E) is done by simultaneous optimization. R-1234yf and R-1234ze(E) are run simultaneously and obtain equations with the same structure. The obtained equation shows the deviation with a small average and an extrapolation pattern that is the same as the existing equation.