You are here:
MISCIBILITY, SOLUBILITY, AND VISCOSITY MEASUREMENTS FOR R-236EA WITH POTENTIAL LUBRICANTS
Citation:
Zoz, S. AND M. Pate. MISCIBILITY, SOLUBILITY, AND VISCOSITY MEASUREMENTS FOR R-236EA WITH POTENTIAL LUBRICANTS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/R-96/063 (NTIS PB96-183884), 1996.
Impact/Purpose:
information
Description:
The report gives results of miscibility, solubility, and viscosity measurements of refrigerant R-236ea with three potential lubricants. (NOTE: The data were needed to determine the suitability of refrigerant/lubricant combinations for use in refrigeration systems.) The lubricants were a mineral oil, alkylbenzene, and polyol ester, each with a nominal viscosity of 68 cSt. The miscibility tests were performed in a test facility consisting of a series of miniature test cells in a constant-temperature bath. The bath temperature was precisely controlled over a range of -50 to 90 C (-58 to 194 F). The test cells are constructed to allow for complete visibility of the refrigerant/lubricant mixtures under all test conditions. Critical solution temperatures obtained from the miscibility data are presented for each refrigerant/lubricant combination. In addition to miscibility data, both solubility and viscosity data were obtained for R-236ea and the most promising lubricant. These data were obtained for a refrigerant concentration range of 0 to 40 wt% refrigerant over a temperature range of 40 to 120 C. This range of conditions represents the area of interest necessary for the proper design of compressors. For comparison purposes, data were also taken for the existing U.S. Navy shipboard chiller refrigerant and lubricant combination, namely R-114 and a napthenic oil.