| Title |
Application of Procedures to Calculate Thermodynamic Properties of Carbon Dioxide, HFC-134a and HCFC-22 |
| Keywords |
Carbon dioxide ; 이산화탄소 ; HFC-134a, HCFC-22, Property calculation ; 상태량 계산 ; Thermodynamic property ; 열역학적 상태량 |
| Abstract |
Systematic methods to calculate thermodynamic properties of carbon dioxide, HFC-134a and HCFC-22 are presented. First, application of a basic method to identify the saturation state with given temperature or pressure is attempted and the feasibility of auxiliary equations is tested. Next, detailed procedures are suggested to tell a phase when temperature/pressure and another property are specified. Finally Newton-Raphson method is applied to calculate unknown thermodynamic properties fixing the state with the two independent properties specified. The procedures described here are utilized to develop a computer program, which is used to find the relation between temperature and pressure with maximum isobaric heat capacity for super-critical carbon dioxide. |