Abstract
This work aims to develop a generalized equation for compressed liquid isochoric specific heat capacity (c v ). The form of the equation was proposed based on the isochoric specific heat capacity calculation equation derived by the Peng-Robinson equation of state. The generalized coefficients were determined by 1734 liquid experimental c v data from 17 refrigerants. With known critical point, acentric factor and idea gas isochoric specific heat capacity, the developed equation can represent the liquid c v of 17 refrigerants well with the average absolute relative deviation of 1.55%. Large deviations are most likely to appear near the critical point. Comparisons were made to the calculation deviations from the Peng-Robinson equation of state and the multiproperty equations in REFPROP 9.1 software. It indicates that the developed equation provide a simple and reliable method for the calculation of the liquid c v . Additionally, 9 mixture refrigerants were calculated by the proposed generalized equation with the average absolute relative deviation of 3.13%.
| Original language | English |
|---|---|
| Pages (from-to) | 33-38 |
| Number of pages | 6 |
| Journal | Fluid Phase Equilibria |
| Volume | 490 |
| DOIs | |
| Publication status | Published - 30 Jun 2019 |
| Externally published | Yes |
Keywords
- Compressed liquid
- Generalized equation
- Isochoric specific heat capacity
- Refrigerants