Hi,

I am working on a building that includes GSHP to cover part of the heating and cooling load. Normally, due to software constrains, we tend to just use excel calculators to predict the energy available from the GSHP. For this particular project, an external company spezialized in designing GSHP carried out a deep analysis and provided us (MEP team) with the heating and cooling provided by the heat pump.

Therefore, I plan to proceed as follows with the energy modelling:

1st: Model the building without GSHP in the software in order to calculate annual energy consumption (energy software -IESve- has no capability to properly model GSHP)

2nd: Use either excel calculator or results from external GSHP company to deduct cooling and heating demand/energy to the results from the energy software.

I have always worked on projects and energy models where everything can be directly modelled in the software, therefore I would like to know:

a) whether the approach previously explained is correct and meets ASRHAE 90.1 guidelines.

b) how detail the GSHP results must be (i.e what should include: provided heating/cooling, pumps, losses, etc)

b) how to properly present a BPRM report for LEED review when 2 different sources of results are used.

Thanks in advance.

Manuel