For single effect refrigeration system it may be 90 degree centigrade

See page 197 ff.

You have to refer the tables or use a specific software like Aspen according to my knowledge

I have attached a file with tables of thermodynamic properties. On page 197 there is data on the properties of bromistolithium solution

Александр Олександр Титлов what is the format of it? İ could not open it

This is a format for reading books:

DjVu Viewer v6.1.0.1492.exe

Here is the chart

Generally, there will be boiling point elevation with LiBr concentration. To find particular value, you should have to go through the pressure-temperature-concentration chart or table of LiBr-H2O solution published by several authors available online.

Cf.: J. Pátek, J. Klomfar, "A computationally effective formulation of the thermodynamic properties of LiBr–H2O solutions from 273 to 500 K over full composition range", International Journal of Refrigeration, 29(4) June 2006, 566-578.Article A computationally effective formulation of the thermodynamic...

Pressure-temperature-concentration can be available in Heat and mass transfer text books. Every chemical temperature and concentration is discussed.