[Equest-users] Minimum Efficiency System 5

Jason Glazer jglazer at gard.com
Wed May 5 06:52:14 PDT 2010 

The test procedure differentiates the equipment. If it is 
rated using ARI 390 then it is a SPVAC while different ARI 
test procedures are used for Table 6.8.1A equipment. I have 
always believed that System 5 "packaged rooftop VAV with 
reheat" from Table G3.1.1B is referencing Table 6.8.1A 
single packaged equipment.

Jason

On 5/4/2010 6:48 PM, Carol Gardner wrote:
> 90.1P ECB Subcommittee can you provide us with some definition? Mike R?
> Jason? Help!
>
>
> On Tue, May 4, 2010 at 12:47 PM, Bishop, Bill <wbishop at pathfinder-ea.com
> <mailto: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 <mailto:wbishop at pathfinder-ea.com>
>
>     www.pathfinder-ea.com <http://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>
>     [mailto: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
>     <mailto: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>
>     [mailto: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
>     <mailto: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 <mailto: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 <mailto:fitzgerald at sevengroup.com>
>
>     *From:* equest-users-bounces at lists.onebuilding.org
>     <mailto:equest-users-bounces at lists.onebuilding.org>
>     [mailto: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
>     <mailto: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
>     <mailto: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 <http://www.mimtarch.com/>
>
>     Sürdürülebilir Binalar Blog
>     http://surdurulebilirbina.blogspot.com
>     <http://surdurulebilirbina.blogspot.com/>
>
>     Green Building in Turkey on LinkedIn
>     http://www.linkedin.com/groups?gid=2278249
>
>         ----- Original Message -----
>
>         *From:* Piyush Varma <mailto:varpiyush at gmail.com>
>
>         *To:* equest-users at lists.onebuilding.org
>         <mailto: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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-- 
Jason Glazer, P.E., GARD Analytics, 90.1 ECB chair
Admin for onebuilding.org building performance mailing lists

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