Abstract
The present paper refers to the determination of the thermodynamic properties of lubricating oil/refrigerant mixtures. Initially, a literature survey was carried out to get suitable equations of state for the following pure refrigerants: R11, R12, R22, R502, R134a, R290, R600 and R600a. Relations were obtained to calculate the following properties: specific volume, density, vapor isentropic exponent of expansion, specific entropy, specific enthalpy, specific heat at constant volume, specific heat at constant pressure and latent heat of vaporization. From the available literature thermodynamic properties of the following lubricating oils were also derived: mineral naphtenic, mineral paraffinic, alkylbenzene, polyalkylene glycol (PAG) and polyol ester. Simplifying assumptions were made in order to establish the properties of oil-refrigerant mixtures. The aim of this work is to gather information for the determination of the thermodynamic properties of the most common refrigerant-oil mixtures, including new refrigerants.
| Translated title of the contribution | Refrigerant-oil mixtures: Thermodynamic properties |
|---|---|
| Original language | Portuguese (Brazil) |
| Pages (from-to) | 52-61 |
| Number of pages | 10 |
| Journal | Ciencia and Engenharia/ Science and Engineering Journal |
| Volume | 9 |
| Issue number | 1 |
| State | Published - Jan 2000 |
| Externally published | Yes |