Contents - Index

VISC_LIBR

VISC_LIBR returns the viscosity of lithium-bromide water solutions in units of Pa-s or lbm/ft-hgr using the correlation published by:

  Lee, R.J., DiGuilio, R.M., Jeter, S.M., and Teja, A.S., " Properties of Lithium Bromide-Water Solutions at High Temperatures and Concentrations  - II Density and Viscosity", ASHRAE Transactions, Paper 3381, RP-527, pp. 709-714, 1990

The VISC_LIBR function requires three parameters.  The first parameter is a string, either 'SI' or 'ENG'  indicating the unit system.  The second parameter is temperature in °C for 'SI' or °F (for 'ENG').  The third parameter is the weight percent of LiBr in the solution.

The valid range for this correlations is :  25°C < T < 200°C  and 45% < X < 65%

Example:  

V=VISC_LIBR('SI', 90,55)  "[Pa-s]  viscosity of a 55% weight percent solution of lithium-bromide water at 90°C"