1991 Volume 8 Issue 1 Pages 25-34
A new measuring method of the oil circulation ratio in the liquid line of refrigeration systems was invented by using the property of oil absorbing light.
The absorption and reference wavelengths were determined in consideration of the asorption spectra of liquid refrigerant and lubricating oil. Next, the oil circulation ratio and transmittance ratio were investigated on the effect of solution temperature in the cases of CFC-12 and HFC-134a and then were confirmed on the influence of soiled-oil and moisture.
This method is accurate and available to nonlight-absorbing CFC-12 and light-absorbing HFC134a, which requires temperature correction.
