[Equest-users] LEED system 5

[Umesh Atre]

Matt,
 
Before looking into the Systems, I would suggest taking a closer look at the inputs on the building shell and internal loads. 
For example, you are using 0.025 w/sf as equipment/plug load for many of your classroom spaces, which is too low. Depending on
the type of equipment (TV, Computers, Projection Eq., SmartBoards), the plug loads could range between 0.25-0.5 w/sf for an elementary school.
 
Also, I noticed your glazing types have U-value > 0.7.
 


________________________________

From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of R B
Sent: Tuesday, June 05, 2012 4:11 PM
To: Matt Clough
Cc: eQUEST Users List
Subject: Re: [Equest-users] LEED system 5


I ran the file you sent - it has heating consumption values, unmet hours is just 200. Strange thing is that the % of hours should be 2.2% or so, instead it is 8.2% - not sure why that is happening - may be the calc procedures have changed for the % calcs?
-Rohini


On Tue, Jun 5, 2012 at 2:37 PM, Matt Clough <mclough at kme-inc.com> wrote:


	I have attached the .pd2 and .inp for the baseline building. 

	 

	I have changed the reheat deltaT, but this has not decreased the unmet hours (which explains the lack of energy used for heating)

	 

	I'm fiddling with HMAX-FLOW-RATIO at the suggestion from the archives, and may try increasing the boiler capacity incrementally.
	But I'm feeling pretty stuck on this one.  Just have to keep reading.
	 
	Thanks for the help

	 

	From: Sami, Vikram [mailto:Vikram.Sami at perkinswill.com] 
	Sent: Tuesday, June 05, 2012 10:13 AM
	To: Nick Caton; Howe, Timothy; Matt Clough; equest-users at lists.onebuilding.org
	Subject: RE: LEED system 5

	 

	1.       Make sure your systems are set to cycle on any

	2.       Make sure you have your reheat Delta T Set correctly. 

	 

	This should take care of the problem - otherwise its probably something more sinister. 

	 

	 

	Vikram Sami, LEED AP BD+C

	Sustainable Design Analyst

	1315 Peachtree St. NE, Atlanta, GA 30309

	t: 404-443-7462    f: 404.892.5823       e: vikram.sami at perkinswill.com   www.perkinswill.com <http://www.perkinswill.com/> 

	Perkins+Will.  Ideas + buildings that honor the broader goals of society

	 

	 

	From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Nick Caton
	Sent: Tuesday, June 05, 2012 10:57 AM
	To: Howe, Timothy; Matt Clough; equest-users at lists.onebuilding.org
	Subject: Re: [Equest-users] LEED system 5

	 

	Unmet heating hours will probably go away once you get your heating operational.  I'd caution against internally justifying/rationalizing one set of unmet hours with another - keep in mind unmet hours are an indicator/symptom of a problem, not a problem in and of themselves.

	 

	For HW consumption, open both models and review the DHW loop, schedules, process loads, and equipment.  Generally everything should be identical excepting HW heater efficiency inputs.

	 

	Reheat coils are set up at the terminal units (zone inputs).  Those relying on wizards can easily miss some required edits to make reheat operate correctly - see attached discussion from the [Bldg-sim] archives for a recap.

	 

	~Nick

	 

	 

	cid:489575314 at 22072009-0ABB

	 

	NICK CATON, P.E.

	SENIOR ENGINEER

	 

	Smith & Boucher Engineers

	25501 west valley parkway, suite 200

	olathe, ks 66061

	direct 913.344.0036

	fax 913.345.0617

	www.smithboucher.com <http://www.smithboucher.com>  

	 

	From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Howe, Timothy
	Sent: Tuesday, June 05, 2012 9:26 AM
	To: Matt Clough; equest-users at lists.onebuilding.org
	Subject: Re: [Equest-users] LEED system 5

	 

	Post the .pd2 and .inp file for this project and we may be able to help you better.

	 

	Timothy Howe, MS, LEED® AP BD+C
	Mechanical Engineer
	Stantec

	61 Commercial Street
	Rochester NY 14614
	Ph:   (585) 413-5347 <tel:%28585%29%20413-5347> 
	Fx:   (585) 272-1814 <tel:%28585%29%20272-1814> 
	Cell: (585) 330-8681 <tel:%28585%29%20330-8681> 

	stantec.com <http://www.stantec.com>  

	 

	The content of this email is the confidential property of Stantec and should not be copied, modified, retransmitted, or used for any purpose except with Stantec's written authorization. If you are not the intended recipient, please delete all copies and notify us immediately.

	 

	ü Please consider the environment before printing this email. 

	From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Matt Clough
	Sent: Tuesday, June 05, 2012 10:24 AM
	To: equest-users at lists.onebuilding.org
	Subject: [Equest-users] LEED system 5

	 

	Salutations!

	 

	I just completed a LEED model, but after reviewing the data results, I think something is wrong.

	 

	The baseline building is showing no energy used for space heating, heat rejection, and service water heating.  I have the 2 boilers modeled, per G3.1.3.2.  This sort of makes sense because the model was showing high unmet heating hours, while the proposed building had had unmet cooling hours (successfully resolved).  

	 

	I set up the system 5 equipment (Packaged VAV with reheat) in the wizard, but it doesn't seem to show a heating component in the DDE.  I'm going to keep looking, but wanted to see if someone could point me in the right direction.

	 

	Regards,

	Matt Clough


	_______________________________________________
	Equest-users mailing list
	http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org
	To unsubscribe from this mailing list send  a blank message to EQUEST-USERS-UNSUBSCRIBE at ONEBUILDING.ORG
	
	


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20120606/830e5f59/attachment-0002.htm>