[Equest-users] Can you use eQuest for PMV calculations?

[Joe Huang]

Varkie,

That's interesting, so at least there are three people who've used the the EMPA surface 
temperature calculation in DOE-2.1E (EMPA, you, and me) :-)

In case anyone's interested, I'm attaching some more information on this feature in 2.1E:
(1) original documentation by Markus Koschenz of EMPA from the 2.1 Update, Version 107
(2) my description of  the comfort calculator that I implemented in 2003 as a User 
Function to 2.1E.

Call me old style, but I really like the User Function in DOE-2.1E, because it allowed me 
to add features and tweaks to the program to get the information that I need, instead of 
just waiting for
the next release of whatever program you're using.

Joe

Joe Huang
White Box Technologies, Inc.
346 Rheem Blvd., Suite 108D
Moraga CA 94556
yjhuang at whiteboxtechnologies.com
www.whiteboxtechnologies.com
(o) (925)388-0265
(c) (510)928-2683
"building energy simulations at your fingertips"


On 4/12/2012 7:06 AM, Varkie C Thomas wrote:
>
> *DOE-2 Supplement Version 21E*
>
> December 1993
>
> Appendix A
>
> Hourly Report Variables
>
> PageA10
>
> LOADS
>
> Variable-Type = u-name of EXTERIOR-WALL
>
> Variable List Number5QHeat transfer from wall to the zone un-weighted (Btu/hr)
>
> Variable List Number6TOutside surface temperature (Rankine)
>
>
> The outside surface temp was used to calculate the inside surface temp in this example
>
> http://bepan.info/contents
>
> http://bepan.info/proj-doe21e/p22_kuwait-shell-mrt
>
> ?Proj-22 - Kuwait-Envelope-Temps-MRT-Systems-Study? 
> <http://bepan.info/yahoo_site_admin/assets/docs/Kuwait-Envelope-Temps-MRT-Systems-Study.14972445.pdf>
>
>
>
>
>
>
> This is a topic that I have explored.  Although DOE-2 (the core engine for eQUEST) does 
> not explicitly solve for the inside surface temperatures, researchers at EMPA in 
> Switzerland back in the late 90's added a routine to DOE-2.1E to back-calculate the 
> inside surface temperatures (think of it as doing a heat balance calculation in 
> reverse).  This featured is documented in DOE-2.1E update package 2 (version 107), but I 
> only have a hard copy of the report.   In 2003, I used this feature to do exactly what 
> Jason is asking, i.e., calculate
> the PMV for naturally ventilated buildings in Egypt.  Recently, I've also used the same 
> feature to estimate the amount of radiant heat
> transfer from attics to the conditioned space, something that is ignored in the 
> weighting factor model in DOE-2.
>
> The bad news, though, is that this feature has not been carried over from DOE-2.1E to 
> DOE-2.2, although I've had some discussions
> with members of the development team about resurrecting it.
>
> Joe
> Joe Huang
> White Box Technologies, Inc.
> 346 Rheem Blvd., Suite 108D
> Moraga CA 94556
> yjhuang at whiteboxtechnologies.com
> www.whiteboxtechnologies.com
> (o) (925)388-0265
> (c) (510)928-2683
> "building energy simulations at your fingertips"
>
> On 4/11/2012 3:42 PM, Alex Krickx wrote:
>>
>> Hi Jason,
>>
>> I'm under the impression that eQUEST can't output surface temperatures which are needed 
>> to calculate PMV values.
>>
>> I think an EnergyPlus based program might be a better place to look. I would ask on the 
>> Bldg-Sim list for recommendations as it has a broader user-base (this list is eQUEST 
>> specific).
>>
>> Good luck,
>>
>> Alex
>>
>> Alex Krickx, LEED AP
>>
>> Building Energy Specialist
>>
>> Serious Energy, Inc.
>>
>> 1250 Elko Dr, Sunnyvale, CA 94089
>>
>> (t) 408.541.8124
>>
>> akrickx at seriousenergy.com
>>
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>> *From:*equest-users-bounces at lists.onebuilding.org 
>> [mailto:equest-users-bounces at lists.onebuilding.org] *On Behalf Of *Jason Quinn
>> *Sent:* Wednesday, April 11, 2012 3:36 PM
>> *To:* equest-users at lists.onebuilding.org
>> *Subject:* [Equest-users] Can you use eQuest for PMV calculations?
>>
>> Is it possible to use an eQuest model to do thermal comfort PMV (Predicted Mean Vote) 
>> calculations per ASHRAE 55/RP884?
>>
>> If not are there any recommendations?
>>
>>
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