i want to know the alternatives for the refrigerant R11 which is available in india now..

i will be helpful if i get the all the properties of the alternate refrigerant............and if i get the p-h diagram for thesame..

I heard/read somewhere that propane (aka R-290) can be substituted for R-12, if you are willing to risk the danger of fire/explosion associated with a propane leak.

I'm not sure about R-11, but Wikipedia has some pretty good info on refrigerants, here:

http://en.wikipedia.org/wiki/Refrigerant
http://en.wikipedia.org/wiki/List_of_refrigerants
http://en.wikipedia.org/wiki/Trichlorofluoromethane
http://en.wikipedia.org/wiki/Dichlorodifluoromethane
http://en.wikipedia.org/wiki/Propane

BTW, you can get an approximation of what the liquid-gas line of the phase diagram should look like using the Clausius–Clapeyron relation.  That is you start with two numbers:  boiling point (at 1 atm) and ΔH of vaporization, and you can use these to calculate P as a function of T.
http://en.wikipedia.org/wiki/Clausius%E2%80%93Clapeyron_relation
Maybe isobutane (R-600a)? It also can be flammable and explosive.
http://en.wikipedia.org/wiki/Isobutane

rickharris6 years ago
You know GOOGLE is a lot faster then waiting for an answer here. Anyway this appears to be an educational project SHOULD we be doing the project for you??

http://www.boconline.co.uk/products/products_by_type/refrigerant_gases/index.asp