'Lights electricity' on an individual room basis

[Daithi]

Hi all,

I would like to know how to identify 'lights electricity' on an individual room basis?

I can identify 'light gain' on an individual room basis, but this differs from 'lights electricity' because when I defined fluorescent lighting under internal gains I multiplied the lamp rating by 20% for conventional ballasts and 10% for electronic ballasts as suggested by CIBSE, so the max power consumption is greater than the max sensible gain.

Is there a variable I have missed in Vista?

Kind regards,

Daithi.

PS I note PNengineer had a similar query in 'Viewing energy consumption of individ. rooms or room groups' but no answer has been posted.

[PCully]

Hi,

I don't think you can do this in Vista, it only reports total lights electricity for the entire building (as you have worked out already). You can probably get what you need from Tabular Room Data in Apache, select the rooms then click on Tabular Room Data button (beside the query button) and you can display for each room the lighting internal gain "Max Power Consumption" - think this is what you are looking for?

Phil

[Daithi]

Hi Phil,

Thanks for the confirmation, I can work it out from that information.

I'm a little surprised it's not a Vista output. Perhaps it might be considered as a future feature?

Regards,

Daithi

[PCully]

yeah,

there are often requests to have more variables added to Vista, I think we do quite well to report the results but users would like to see more of the model inputs in the same tables (floor area, volume, gains power, etc). The tabular room data technology that we now have in Apache should be getting used more and more across VE and hopefully will find its way into Vista to allow us to offer more outputs but until then our best friend is a spreadsheet where we can export the data and do get the info that Vista doesn't currently provide.

Thanks fo the feedback though, it will be in mind when we make these updates over the next few versions of VE.

Phil

[KasperS]

Yeah it would be great with more options, but just remember to make us able to turn them off from the solver, to reduce the time the computer has to spend calculating.

[PCully]

that's why we don't have more at the moment, if Vista/.aps results files contained every variable related to a model (people are usually looking for both inputs and outputs these days) the results files would be massive and everything would take even longer. We need to find a way of delivering this data efficiently I think.

Phil

[KasperS]

If you give people a lot of freedom to choose what they actually need, then i dont see it as a problem. Id rather be able to have a model that can get me all the data i need and it takes longer time, if i can just turn those things off, than not have it.