Miscibility of lubricants with refrigerants

Miscibility data is being obtained for a variety of non-CFC' refrigerants and their potential lubricants under a program initiated and supported by the Air-Conditioning and Refrigeration Technology Institute.At least ten (10) different refrigerants and seven (7) different lubricants are being investigated.Experiments are being performed in two phases: Phase I focuses on performing• screening tests and Phase II consists of developing miscibility plots.The miscibility tests are being performed in a test facility consisting of a series of miniature test cells submerged in a constant temperature bath.The bath temperature can be precisely controlled over a temperature range of -so•c to 100•c.The test cells are constructed to allow for complete visibility of lubricaiurefrigerant mixtures under all test conditions.Tables and plots of critical solubility temperatures versus lubricant and refrigerant concentrations will be developed.•