[Equest-users] Minimum Efficiency System 5

Pasha Korber-Gonzalez pasha.pkconsulting at gmail.com
Tue May 4 10:58:22 PDT 2010


Cam,

I'm curious to where you found the reference for a "single package"
sub-category and how it is pointing to table A to be used for performance
factors of packaged equipment as opposed to table D which is specific to
packaged a/c units.

I looked back through 90.1 and can't find any notes or guidance to follow
your recommendation to point me to table 6.8.1A.  Can you please provide
more specific reference to where you are getting this info from Appendix
G?   This could be a significant thing for the rest of us to learn and for
me to correct if I have missed the info you are refering to.

Thanks for your help on this.

pasha

On Tue, May 4, 2010 at 6:30 AM, Cam Fitzgerald
<cam at energyopportunities.com>wrote:

>  Omer:
>
>
>
> For system type 5 you should be using sub-category “single package” with
> the appropriate heating section type from Table 6.8.1A.  Table 6.8.1D
> applies to system types 1 and 2, small packaged terminal units.
>
>
>
> Hope this helps.  Have a great day!
>
>
>
> Cam S. Fitzgerald, PE, LEED AP
>
>
>
> Energy Opportunities, LLC
>
> a 7group company
>
> e-mail:  fitzgerald at sevengroup.com
>
>
>
> *From:* equest-users-bounces at lists.onebuilding.org [mailto:
> equest-users-bounces at lists.onebuilding.org] *On Behalf Of *Pasha
> Korber-Gonzalez
> *Sent:* Tuesday, May 04, 2010 5:30 AM
> *To:* Ömer Moltay
> *Cc:* equest-users at lists.onebuilding.org
>
> *Subject:* Re: [Equest-users] Minimum Efficiency System 5
>
>
>
> Omer,
>
>
>
> I would use 6.8.1D.  Just because you are looking at a COP value doesn't
> mean that it wasn't originally an EER or SEER value, you might want to back
> out the EER value from your equivalent COP and see if you can reference it
> from the 6.8.1D table for Packaged equipment performance.
>
>
>
> pasha
>
> 2010/5/4 Ömer Moltay <omoltay at mimtarch.com>
>
> Dear All,
>
>
>
>
>
> What would you choose as the minimum efficiency for baseline modelling for
> the DX cooling (923 kW) of System Type 5 from Appendix G (Packaged rooftop
> VAV with reheat)? I am looking at a model previously done by someone else
> and the COP has been chose as 2.96, which could mean that they have used
> Table 6.8.1A - Condensing units, air cooled. But I am not sure if this
> should be correct.
>
>
>
> Thanks,
>
>
>
> Ömer Moltay, LEED AP
> Mimta Ltd.
> Hekimsuyu Cad. 559. Sk. No:39
> 34255 Kucukkoy Istanbul Turkey
> Tel: 90-212-617-2296
> Fax: 90-212-617-2297
> www.mimtarch.com
>
>
>
> Sürdürülebilir Binalar Blog
> http://surdurulebilirbina.blogspot.com
>
>
>
> Green Building in Turkey on LinkedIn
> http://www.linkedin.com/groups?gid=2278249
>
>  ----- Original Message -----
>
> *From:* Piyush Varma <varpiyush at gmail.com>
>
> *To:* equest-users at lists.onebuilding.org
>
> *Sent:* Tuesday, May 04, 2010 11:55 AM
>
> *Subject:* [Equest-users] Queries
>
>
>
> Hi all,
>
>
>
> I am an eQuest newbie and had 2 small queries which hopefully would be
> answered.
>
>
>
> 01. What's the logic behind eQuest giving positive (+ve) Cooling Loads &
> (-ve) negative Heating Loads. (I made an Admittance Method Algorithm & it
> gives me the opposite values, eQuest i.e. negative cooling loads & +ve
> heating loads, have checked all sign convention...can't figure out why? My
> algorithm simulates for Delhi's (India) climate predominantly, cooling
> loads.
>
>
>
> 02. I have asked this before...is there any library for data of alternating
> solar gain factors, especially for Delhi, India. (As far as i believe
> it does'nt take into account the alternating solar gain factor...)
>
>
>
> hope these get resolved soon, thanks in advance.
>
>
>
> Regards,
>
> Piyush
>  ------------------------------
>
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