I found TRNSYS very useful as it can take almost every parameter which effect building performance and very good for building energy simulations.Its a very good tool for energy analyst and quite flexible in term of use.

TRNSYS group help, I used TRNSYS for BES of Greenhouse and found TRNSYS very promising tool to run simulations of greenhouse

It has a great variety of applications which allow to accurately simulate any thermodynamic system. Visible code helps of better understanding of components. Furthermore, it is good that one can make his own component to model a system.