[Equest-users] Non conditioned regularly occupied space

[vamshi ranga]

Dear All,

Thank you very much for the clarification, from the list of suggestions my
understanding is that, we need to model cooling system for total regularly
occupied space and consider the baseline system accordingly.

But, I could not understand, how the exceptional calculations are to be
made to show savings? And it is also suggested that, Proposed case set
points are to be made such that no cooling or heating happens, will that be
acceptable?

Thanks,
Vamshi.



On Fri, Aug 30, 2013 at 9:50 PM, r s <ramyashivkumar at gmail.com> wrote:

> HI Vamshi,
>
> If the 95,000 sqft spaces are deemed to be conditioned per Section 3
> ASHRAE 90.1 space definition, your Baseline system type based on 100,000
> sqft not 5000 sqft. You will then have to model a baseline cooling and
> heating system in the Proposed model and model your office space system as
> designed. You can then claim savings for natural ventilation / fans using
> exceptional calculation method.
>
> Hope this helps.
>
> Regards
> Ramya
>
>
> On Fri, Aug 30, 2013 at 12:10 PM, Singh, Arvind <Arvind.Singh at dnvkema.com>wrote:
>
>>  I am telling you with my experience.  The minute you include this space
>> in your model your system type will change. You have to assigned a system
>>  to “95,000 ft2 of regularly occupied office” and claim the saving of
>> natural ventilation using exceptional calculation.****
>>
>> ** **
>>
>> Arvind ****
>>
>> ** **
>>
>> *From:* Kushagra Juneja [mailto:maverick.kushagra at gmail.com]
>> *Sent:* Friday, August 30, 2013 10:59 AM
>> *To:* Singh, Arvind
>> *Cc:* vamshi ranga; David Eldridge; equest-users at lists.onebuilding.org
>>
>> *Subject:* Re: [Equest-users] Non conditioned regularly occupied space***
>> *
>>
>> ** **
>>
>> Hi guys. ****
>>
>> ** **
>>
>> I somehow agree with Arvind. However, ASHRAE system type selection is
>> based on conditioned area and not overall area. ****
>>
>> ** **
>>
>> If you think you need to claim savings for natural ventilation, the same
>> can be done using exceptional calculation. One approach I saw and was
>> approved by GBCI was when a HVAC system was modeled in both Baseline and
>> Proposed Case. The schedule of Proposed Case was so adjusted, to turn the
>> system off when the adaptive comfort temperature is met in the space in the
>> Proposed Case. That ways, the Baseline system was still running to meet
>> space temperatures while the Proposed system was not running and hence the
>> savings. ****
>>
>> ** **
>>
>> There are few CIRs on this which I might be able to share in the due
>> course. ****
>>
>>  ****
>>
>> ** **
>>
>> Thanks****
>>
>> ** **
>>
>> Kushagra****
>>
>> ** **
>>
>> ** **
>>
>> On Fri, Aug 30, 2013 at 9:01 PM, Singh, Arvind <Arvind.Singh at dnvkema.com>
>> wrote:****
>>
>> Hi Vamshi,****
>>
>>  ****
>>
>> Based on your sqft and fuel size you will have system type and that will
>> be system 6 in your case. Baseline model and proposed both will need
>> heating and cooling system for non-conditioned space. But you can set up
>> high cooling set point for baseline and proposed model to avoid any cooling
>> in the non-conditioned space.****
>>
>>  ****
>>
>> Thanks,****
>>
>> Arvind****
>>
>>  ****
>>
>> *From:* equest-users-bounces at lists.onebuilding.org [mailto:
>> equest-users-bounces at lists.onebuilding.org] *On Behalf Of *vamshi ranga
>> *Sent:* Friday, August 30, 2013 10:21 AM
>> *To:* David Eldridge
>> *Cc:* equest-users at lists.onebuilding.org
>> *Subject:* Re: [Equest-users] Non conditioned regularly occupied space***
>> *
>>
>>  ****
>>
>> Dear David,****
>>
>>  ****
>>
>> The 95,000 ft2 area has only normal ceiling fans.****
>>
>>  ****
>>
>> As I read in ASHRAE 90.1, it says, we shall model HVAC (Cooling or
>> Heating) even if there is NO system proposed. But in this case, VRV system
>> is proposed for 5000 ft2 area, so how shall I proceed with the remaining
>> 95,000 ft2 area?****
>>
>>  ****
>>
>> Thanks,****
>>
>> Vamshi.****
>>
>>  ****
>>
>> On Fri, Aug 30, 2013 at 4:31 PM, David Eldridge <
>> DEldridge at grummanbutkus.com> wrote:****
>>
>> Just to clarify - does the remaining 95,000 ft2 of regularly occupied
>> office have an engineered natural ventilation scheme?
>>
>> There are some cases where 90.1 asks for cooling systems to be modeled
>> even if none are proposed. You'll need to find out if those conditions
>> apply to you.
>>
>> DSE Mobile****
>>
>>
>> On Aug 30, 2013, at 4:06 AM, "vamshi ranga" <vamshiranga at gmail.com>
>> wrote:
>>
>> > Dear All,
>> >
>> > We are modeling Non residential building for USGBC New Construction
>> rating, which has regularly occupied (office) area of 100000 sq ft, out of
>> which only 5000 sq ft of the regularly occupied (office) area is
>> conditioned with VRV systems.
>> >
>> > Could you please let us know how the conditioned area shall be
>> considered in Baseline and Proposed case. my doubts is,
>> >
>> > Shall this be modeled with 5000 sq ft  conditioned area in both Base
>> and Proposed or Is there any minimum requirement for percentage conditioned
>> area?
>> >
>> > Thanks,
>> > Vamshi.****
>>
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>>
>>
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>>
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