[Equest-users] % LOAD ATTRIBUTED TO OA DELIVERY

[Brian Fountain]

This is a good tip and I often use the difference between LS-C and SS-D 
to give me a quick assessment of the impact of heating (or cooling) 
ventilation air.  However, it is good to understand the other 
contributors to the differences between the peak heating (or cooling) 
loads in LS-C and SS-D. Key differences that come to mind:
- LS-C only reports the peak loads in conditioned spaces.  That means 
that if you have plenums defined in your model, the roof heat loss is 
likely not reported in LS-C.
- Loads use the space keyword TEMPERATURE to determine the peak load 
whereas in SS-D it is the heating and cooling setpoint value at the time 
of peak load occurrence that is used.



On 12/10/2015 9:55 AM, Keith Swartz wrote:
>
> Mark,
>
> Look at the differences between values in reports LS-D and SS-D. SS-D 
> includes ventilation. LS-D does not. (The first letter “S” stands for 
> “system.” “L” is for “load,” the load in the space.)
>
> Keith Swartz, PE| Senior Energy Engineer
>
> *Seventhwave*| *Madison.Chicago.Minneapolis***
>
> 608.210.7123 seventhwave.org
>
> *From:* Shaun Martin [mailto:smartin at shaunmartinconsulting.com]
> *Sent:* Friday, October 09, 2015 12:13 PM
> *To:* 'Mark Hallman' <Mark.Hallman at rwdi.com>; 'Bishop, Bill' 
> <bbishop at pathfinder-ea.com>; equest-users at lists.onebuilding.org
> *Subject:* Re: [Equest-users] % LOAD ATTRIBUTED TO OA DELIVERY
>
> Hi Mark,
>
> You can use hourly reports to pull out the outside air volume 
> (variable PO) plus the supply and return volumes and temperatures. 
> Then off to a spreadsheet.
>
> Or, if you’re feeling ambitious, you could write an input function 
> (see Topics).
>
> Shaun
>
> Shaun Martin LEED-AP, BEMP
>
> Principal
>
> Shaun Martin Consulting
>
> #90 – 425 Carrall Street
>
> Vancouver, BC V6B 6E3
>
> p. 604-789-1095
>
> *From:* Equest-users 
> [mailto:equest-users-bounces at lists.onebuilding.org] *On Behalf Of 
> *Mark Hallman
> *Sent:* Wednesday, October 7, 2015 7:59 PM
> *To:* 'Bishop, Bill' <bbishop at pathfinder-ea.com 
> <mailto:bbishop at pathfinder-ea.com>>; 
> 'equest-users at lists.onebuilding.org' 
> <equest-users at lists.onebuilding.org 
> <mailto:equest-users at lists.onebuilding.org>>
> *Subject:* Re: [Equest-users] % LOAD ATTRIBUTED TO OA DELIVERY
>
> Thanks Bill, nice tip. Any way of parsing it out without running two 
> simulations?
>
> Tx!
> Mark.
>
> *mark hallman*
>
> p.eng. leed ap bd&c
>
> project engineer
>
> mdh at rwdi.com <mailto:mdh at rwdi.com>
>
> 519 823 1311 x2494
>
> RWDI:  the science of buildings, structures & the environment.  See 
> what we do HERE <http://www.rwdi.com/#%21services3/c1h0m>.
>
> *From:*Bishop, Bill [mailto:bbishop at pathfinder-ea.com]
> *Sent:* Wednesday, October 07, 2015 11:12
> *To:* Mark Hallman; 'equest-users at lists.onebuilding.org'
> *Subject:* RE: % LOAD ATTRIBUTED TO OA DELIVERY
>
> One way would be to create a MIN-AIR-SCH with all hourly values set to 
> 0 (or 0.001 to activate economizer), apply it to all SYSTEMs and use 
> the difference in the outputs.
>
> Regards,
>
> ~Bill
>
> *William Bishop, PE, BEMP, BEAP, CEM, LEED AP **|**Pathfinder 
> Engineers & Architects LLP*
>
> *Senior Energy Engineer*
>
> 	
>
> 134 South Fitzhugh StreetRochester, NY 14608
>
> */T: (585) 698-1956/*F: (585) 325-6005
>
> bbishop at pathfinder-ea.com 
> <mailto:wbishop at pathfinder-ea.com>www.pathfinder-ea.com 
> <http://www.pathfinder-ea.com/>
>
> http://png-5.findicons.com/files/icons/977/rrze/720/globe.pngCarbon 
> Fee and Dividend - simple, effective, and market-based.
>
> *From:* Equest-users 
> [mailto:equest-users-bounces at lists.onebuilding.org] *On Behalf Of 
> *Mark Hallman
> *Sent:* Wednesday, October 07, 2015 10:59 AM
> *To:* 'equest-users at lists.onebuilding.org' 
> <equest-users at lists.onebuilding.org 
> <mailto:equest-users at lists.onebuilding.org>>
> *Subject:* [Equest-users] % LOAD ATTRIBUTED TO OA DELIVERY
>
> Hi there,
>
> Is there a way to accurately parse out from the eQUEST output file the 
> percentage of the cooling and heating load that is attributed to OA 
> delivery?   Any advice would be appreciated.
>
> Thanks in advance!
> Mark Hallman.
>
> *mark hallman*
>
> p.eng. leed ap bd&c
>
> project engineer
>
> mdh at rwdi.com <mailto:mdh at rwdi.com>
>
> 519 823 1311 x2494
>
> RWDI:  the science of buildings, structures & the environment.  See 
> what we do HERE <http://www.rwdi.com/#%21services3/c1h0m>.
>
>
>
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