[EnergyPlus_Support] Re: ashrae 90.1, EPACT

["jeannieboef" <jeannieboef@xxxxxxxxx>]

As I understand it, you need to calculate how much you would pay for the solar panel generated power if you were to buy it in (at the same rate as your grid electricity), bearing in mind you are only allowed to bring into consideration electricity that is also used buy your building. That means, hypothetically, if you were to generate power on site at night when your building is not using it, it is considered wasted unless you could save it and use it during the day. So in your case, 17% is far off enough to assume that the PV-system would never generate more than the building needs (check me on this) and therefore you can "subtract" this amount in USDollers from the total energy cost of the year. To do this I would assign the PV-electricity rate equal to the grid electricity rate (if that's possible with a meter on the PV-plant) and then, as you say, subtract it from the total building energy cost (because you're not paying for it). This way it can be clearly seen what the building energy cost is and how much money (energy) is being saved.

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Prasad" <prasad_hvac@...> wrote:
>
> Can someone clarifies my doubt about EPACT2005 please
> 
> "If the RFP says building shall exceed ASHRAE 90.1., or if it says it shall exceed California title 24 by 30%, do either AHSRAE 90.1 or California Title 24 have any verbiage that says electricity generated by photovoltaic panels on the building can be deducted from the electricity used by the building?  In other words, if the model says the proposed building is better than ASHRAE 90.1 by 13% and photovoltaics generate 17% of the basebuilding's energy use, then is it legitimate according to ASHRAE 90.1 or Title 24 to say that 30% is achieved?  (30%= 13% added to 17%)"
> 
> Thanks
> Prasad
>




------------------------------------

Primary EnergyPlus support is found at:
http://energyplus.helpserve.com or send a message to energyplus-support@xxxxxxxx

The primary EnergyPlus web site is found at:
http://www.energyplus.gov

The group web site is:
http://groups.yahoo.com/group/EnergyPlus_Support/

Attachments are currently allowed but be mindful that not everyone has a high speed connection.  Limit attachments to small files.

EnergyPlus Documentation is searchable.  Open EPlusMainMenu.pdf under the Documentation link and press the "search" button.
Yahoo! Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/EnergyPlus_Support/

<*> Your email settings:
    Individual Email | Traditional

<*> To change settings online go to:
    http://groups.yahoo.com/group/EnergyPlus_Support/join
    (Yahoo! ID required)

<*> To change settings via email:
    EnergyPlus_Support-digest@xxxxxxxxxxxxxxx 
    EnergyPlus_Support-fullfeatured@xxxxxxxxxxxxxxx

<*> To unsubscribe from this group, send an email to:
    EnergyPlus_Support-unsubscribe@xxxxxxxxxxxxxxx

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/