Enquiry on defining a Ventilation System in Room Data

Hi Brian,

I understand you are referring to the system types displayed in the compliance documentation, is that correct? If so, these outputs are 100% defined by the SBEM calculation engine so we would not be best placed to comment on this. It is important to remember that Energy Simulator is an interface to SBEM engine: 

An important note on the PartL calculation - OpenBuildings | AECOsim | Speedikon Wiki - OpenBuildings | AECOsim | Speedikon - Bentley Communities

Your accreditation scheme provider would be much better placed to advise, or alternatively you can reach out to BRE themselves here. As they are the ones who define SBEM calculation methodologies they will be able to clarify for you.

Hi Shane,

I have met a similar problem and I am not sure if this is related to the SBEM calculation engine or Energy Simulator. Hope its fine to ask here.

I copied the lighting parameter from the notional building to the proposed building and try to compare the results in Part L calculation in which it is supposed it should come out with the same . However, it didnt and the notional results is still much lower than proposed case.

I input the lighting parameter under 'Lighting' and 'Lighting Output' under Room Data.

Do you help on this?

Thanks

Brian

Hi Brian,

There will be a lot more going on behind the scenes in relation to this in the SBEM calc methods, as it incorporates data like room types and building types to calculate a lot of such outputs, by using the data on the NCM database (eg the effect of this on occupancy is detailed here, for instance).  The geometry of the room will also impact on this, should it be top-lit or side-lit. 

Please find some further details of what I mean from the iSBEM user guide below, to give you an idea:



The NCM modelling guide also outlines what other aspects can impact on these results, eg:

Should you wish to dig further into the calc methods the NCM modelling guide and iSBEM user guides are available freely on the NCM website as shown here, they contain a lot of useful information that should assist. 

Hi Brian,

There will be a lot more going on behind the scenes in relation to this in the SBEM calc methods, as it incorporates data like room types and building types to calculate a lot of such outputs, by using the data on the NCM database (eg the effect of this on occupancy is detailed here, for instance).  The geometry of the room will also impact on this, should it be top-lit or side-lit. 

Please find some further details of what I mean from the iSBEM user guide below, to give you an idea:



The NCM modelling guide also outlines what other aspects can impact on these results, eg:

Should you wish to dig further into the calc methods the NCM modelling guide and iSBEM user guides are available freely on the NCM website as shown here, they contain a lot of useful information that should assist. 

thank you so much Shane

Regards,

Brian

You're very welcome Brian!

Regards,

Shane