[Bldg-sim] Using HAP for LEED project energy modeling- Question

[David Eldridge]

There are some good articles from the recent SimBuild conference about using
an external program to simulate daylighting control response, and then input
lighting schedules to eQuest (same process for HAP) based on those results:



 http://www.ibpsa.us/sb10pub.shtml



http://www.ibpsa.us/pub/simbuild2010/papers/SB10-DOC-TS06A-02-An.pdf

*Integrating advanced daylight analysis into building energy analysis*
J An, S Mason(paper<http://www.ibpsa.us/pub/simbuild2010/papers/SB10-DOC-TS06A-02-An.pdf>|
presentation)



I can’t say whether results from Solartube are the best resource to perform
a similar process, or if the consultant on your project should do the
external modeling.  (Well, okay if you twist my arm I suspect the consultant
should do it!  Or at least Solartube should provide some detailed
information about their process and tools.)



Same thing for PV – you can probably come up with a pretty decent
exceptional calculation.



The cogen is a little different, as there is quite a bit of interaction
between thermal energy produced by the external calculation, and thermal
energy consumed within the HAP model, and the production may change
depending on the electrical demands, and the timing of the need for hot
water is important.



Passing electricity generation and consumption information back and forth
doesn’t have the same complexity that the thermal simulation will have.



Hope this helps!



David



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David S. Eldridge, Jr., P.E., LEED AP BD+C, BEMP, HBDP

*Grumman/Butkus Associates*

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*From:* bldg-sim-bounces at lists.onebuilding.org [mailto:
bldg-sim-bounces at lists.onebuilding.org] *On Behalf Of *
dlombard at earthlink.net
*Sent:* Tuesday, November 02, 2010 10:45 AM
*To:* bldg-sim at lists.onebuilding.org
*Subject:* [Bldg-sim] Using HAP for LEED project energy modeling- Question



Hi All,

I have a concern about using HAP for LEED project energy modeling. The
software provider stated that HAP does not model daylighting and we have 13
Solatubes in a 2000 SF buidling. They also said it doens't model PV and
co-gen, which we have both. A 1.2 kW PV system and a residential co-gen
system that produces electricity and hot water for our 2000 SF building as
well as some for other buidling aras on the small non-profit's campus.

I concerned that modeling the PV system and co-gen system externally and
just putting those numbers into HAP and having the solatube mfgr model the
solatubes and giving us some number to put into HAP will not yield the
"real" same reuslts as running an eQuest model for a true integrated energy
model.

Any comments? I haven't used eQuest or HAP myself and am trying to get
feedback from people that have who are not already part of the project's
paid design team.

Thank you very much for your effort in advance.

Regards,

Debra

Debra Lombard, LEED AP, EMIT, EIT
Sustainability Consulting, Project Management, and Marketing

dlombard at earthlink.net
203-781-0037
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