Hello,

we are currently working on an energy model. The building we are modelling contains a heat sink for cooling loads within the sprinkler tank, which we can't model with our simulation program. To benefit from the savings the heat sinks will generate, we want to use the exceptional calculations method. Here comes the problem:

According to appendix G2.5 the exceptional calculation needs to include:

c. A sensitivity analysis of energy consumption when each of the input parameters are varied from half to double the value assumed

d. the calculations shall be performed on a time step basis consistent with the simulation program used (which means hourly values during a year)

The way we see it, the exceptional calculation is basically another dynamic simulation. Since our simulation software can't model the heat sink properly, we are kind of stuck.

Any thoughts will be much appreciated!