[Equest-users] Non conditioned regularly occupied space

[r s]

HI Vamshi,

Perhaps Appendix D Exceptional calculation methodology for natural
ventilation outlined within ADVANCED ENERGY MODELING FOR LEED will be a
good starting point of reference.

Regards
Ramya


On Sun, Sep 1, 2013 at 5:55 AM, vamshi ranga <vamshiranga at gmail.com> wrote:

> 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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