[Equest-users] Minimum Efficiency System 5

[Pasha Korber-Gonzalez]

I agree with Bill, he stated better than I could when he said, "I don’t see
where units in Table 6.8.1A are necessarily rooftop units per the Table
G3.1.1B requirement."

 pasha


On Tue, May 4, 2010 at 1:47 PM, Bishop, Bill <wbishop at pathfinder-ea.com>wrote:

>  So what’s the difference (other than minimum efficiency) between a
> 230,000 Btu/h single package air conditioner in Table 6.8.1A and a 230,000
> Btu/h single package vertical air conditioner in Table 6.8.1D?
>
>
>
> I guess the SPVAC is installed on an outside wall (per the definition in
> Section 3.2), but I don’t see where units in Table 6.8.1A are necessarily
> rooftop units per the Table G3.1.1B requirement.
>
>
>
> *William Bishop, EIT, BEMP, LEED® AP **|** **Pathfinder Engineers &
> Architects LLP***
>
> Mechanical Engineer
>
>
>
> 134 South Fitzhugh Street
> Rochester, NY 14608
> T: (585) 325-6004 Ext. 114
> F: (585) 325-6005
>
> wbishop at pathfinder-ea.com
>
> www.pathfinder-ea.com
>
> P Please strive to live sustainably.
>  ------------------------------
>
> *From:* equest-users-bounces at lists.onebuilding.org [mailto:
> equest-users-bounces at lists.onebuilding.org] *On Behalf Of *Demba Ndiaye
> *Sent:* Tuesday, May 04, 2010 3:07 PM
> *To:* Pasha Korber-Gonzalez; Cam Fitzgerald
>
> *Cc:* equest-users at lists.onebuilding.org
> *Subject:* Re: [Equest-users] Minimum Efficiency System 5
>
>
>
> You indeed have to use Table 6.8.1A. The units in Table D are for the
> terminal units (they are normally un-ducted, in direct contact with the
> space they serve).
>
>
>
> _____________
>
> Demba NDIAYE
>
>
>
> *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 1:58 PM
> *To:* Cam Fitzgerald
> *Cc:* equest-users at lists.onebuilding.org
> *Subject:* Re: [Equest-users] Minimum Efficiency System 5
>
>
>
> 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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