@Mohammad Mehdi

Thanks for your response but the question is something else. read the explanation first.

This paper can help you modeling the absorption refrigeration cycle:

Computer modeling of a single-stage lithium bromide/water absorption refrigeration unit, Lansing, F. L., AA(Jet Propulsion Lab., California Inst. of Tech., Pasadena)

thanks Toro

I am using water ammonia

if you have similar paper please inform me about.

Hi Rasool,

Is it going to be for HVAC? it is better to use Li-Br. However, you can use EES external library to get the properties.  I have it for single and double effect absorption chiller. It is kind of difficult when it comes to chemical exergy for Li-Br.

Please see this EES.  

It did not work out as I did not manage to include the EES file. I used rar to have it uploaded. 

Hope it works.