working fluid in solar water heating system

hello
is it possible to change the fluid that work in the collectors in solar water heating system?
if yes ,how? i want to use a fluid with temperture dependent property.
thank you

sam.nrel.gov/node/69067

Maybe you can check this post.

Zhiyong Tian

thanks a lot for your answer,
but i can't find my answer in that page and i don't know yet that it is possible to change working fluid property(for example by using scripts).

SAM's solar water heating model allows you to choose between water and glycol as the working fluid. You make that choice on the Solar Water Heating input page in the System group.

Best regards,
Paul.