Solidification Characteristics of Rising Immiscible Oil Dropletsin Refrigerant Solution

Characteristics of Refrigerant and Oil Losses Due to a Leakage in Air Conditioning System

Possibility of a system leakage in an air-conditioning system always exists. Once a leakage occurs refrigerant and oil escape from the system and compressor. This paper determines the characteristics of the losses. Two important factors affecting the loss characteristics are location of leakage in the system and speed ofleakage or leakage rate. This paper then reasons the tested actual loss cha...

Prediction of the Behaviour of Oil Refrigerant Mixtures

Determination of the Thermodynamic Properties of Refrigerant-Oil Mixtures

The errors associated with therModynamic performance calculations are discussed with particular reference to systems with a high oil charge. It is shown that calculations made using published refrigerant data can be very misleading as no account is taken of the oil solubility effects. Pressure-enthalpy charts are presented for refrigerant R12 oil mixtures, for a range of oil concentrations. The...

Outgassing and Absorption Rates of Oil/Refrigerant Mixtures

Knowledge of the solubility characteristics of an oiVrefrigerant mixture is important when analyzing the lubrication system behavior in refrigerant compressors since the solubility significantly affects the viscosity of the mixture. For an operating compressor, the lubricant is a mixture of oil and refrigerant and the viscosity of the mixture is a strong function of the refrigerant concentratio...

Influence of electric current pulses on the solidification of Cu-Bi-Sn immiscible alloys

Continuous solidification experiments were carried out with Cu-Bi-Sn alloys under the effects of Electric Current Pulses (ECPs). A model describing the microstructure evolution was developed. The formation of the microstructure in the continuously solidified alloys was calculated. The calculations demonstrated that ECPs mainly affect the solidification process through changing the energy barrie...