[Bldg-sim] Apendix G3.1.2.9- More questions

Wed Mar 24 16:42:37 PDT 2010

Peter---

Are you using eQUEST for modeling?   If so, you can right click in the
"Static in WG" box and hit "Restore Default".  This will enable the
"Design kW/CFM" input field.

Andrew Craig EIT, LEED AP
Mechanical Designer / Energy Analyst

INTERFACE ENGINEERING
email andrewc at interfaceeng.com <mailto:andrewc at interfaceeng.com> 
direct 503.382.2696

From: bldg-sim-bounces at lists.onebuilding.org
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of W. Peter
Anderson
Sent: Wednesday, March 24, 2010 2:45 PM
To: Kevin Kyte; Fareed Syed; Gregg Liddick;
Kimberly at NorthernArchitects.com; bldg-sim at lists.onebuilding.org
Subject: Re: [Bldg-sim] Apendix G3.1.2.9- More questions

I am working on a model doing the exact same thing for LEEDS baseline.
I have calculated my Pfan but cant seem to input it or get the correct
outputs.  

The model wont allow me to enter anything in the kW/cfm screen. My
equipment is a PSZ

Should I adjust the Static Pressures and efficiencies to get the same
value?

Regards,

W. Peter Anderson, P.E
JP Engineering
41 Mechanic Street
Windsor, CT 06095
Ph: 860/688-5223
Fax: 860/688-5269

	----- Original Message ----- 

	From: Kevin Kyte <mailto:KKyte at watts-ae.com>  

	To: Fareed Syed <mailto:syedf at progressiveae.com>  ; Gregg
Liddick <mailto:gliddick at theepstengroup.com>  ; 
Kimberly at NorthernArchitects.com ; bldg-sim at lists.onebuilding.org 

	Sent: Wednesday, March 24, 2010 4:19 PM

	Subject: Re: [Bldg-sim] Apendix G3.1.2.9

	Fareed,

	Set your supply air to room temp delta t equivalent to 20F.  Run
the sim, if I am not mistaken this should generate usable airflow
quantities to be used in point 9.  Make sure you have oversizing in
place before any of this.  I have not been told this but I think G is
set up to be done step by step from the beginning.  In some instances
you need to update your model in order to proceed with the next step.
Good luck.

	Kevin

________________________________

	From: Fareed Syed [mailto:syedf at progressiveae.com] 
	Sent: Wednesday, March 24, 2010 9:29 AM
	To: Gregg Liddick; Kimberly at NorthernArchitects.com; 
bldg-sim at lists.onebuilding.org
	Subject: Re: [Bldg-sim] Apendix G3.1.2.9

	Hi Greg,

	My basic question is which cfm do I take to calculate Pfan? Just
the supply to come up with kW/cfm or sum of supply, return, relief, and
exhaust fans?

	Thanks,

	Fareed Syed EIT, LEED(r) AP

	Mechanical Engineer 

	1811 4 Mile Rd NE
	Grand Rapids, MI  49525

	Phone: 616.361.2664 ext. 3247
	Direct: 616.447.3447
	Fax: 616.361.1493 

	syedf at progressiveae.com
	www.progressiveae.com <http://www.progressiveae.com/> 

	From: Gregg Liddick [mailto:gliddick at theepstengroup.com] 
	Sent: Wednesday, March 24, 2010 9:18 AM
	To: Kimberly at NorthernArchitects.com; Fareed Syed;
bldg-sim at lists.onebuilding.org
	Subject: RE: [Bldg-sim] Apendix G3.1.2.9

	Hi Kim,

	I'm fairly certain that there's no specific guidance in Appendix
G.  What most people do is break it up so that it's proportional to the
proposed case.  For example if the baseline fan power is 34.5 kW and the
actual parameters call for 20 kW supply and 10 kW return you would break
the baseline case up into 23 kW supply and 11.5 kW return.  I hope that
helps.

	Gregg Liddick, EIT, LEED(r) AP

	The Epsten Group, Inc.

	429 Edgewood Avenue

	Atlanta GA 30312

	Phone: 404-577-0370  ext. 102

	Fax: 404-577-1739

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

	Please consider the environment before printing this e-mail.

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	From: Kimberly Killian [mailto:Kimberly at NorthernArchitects.com] 
	Sent: Wednesday, March 24, 2010 7:36 AM
	To: Gregg Liddick; syedf at progressiveae.com;
bldg-sim at lists.onebuilding.org
	Subject: Re: [Bldg-sim] Apendix G3.1.2.9

	Gregg,

	Is there guidance on what portion of the Pfan goes to each? What
percentage goes to supply, what percentage to return, etc?

	Kimberly Killian
	Northern Architects, Inc.
	207 King Street Suite 3
	Burlington VT 05401
	T: 802-658-1953
	F: 802-658-2975

________________________________

	Original message
	From: "Gregg Liddick"  
	To: syedf at progressiveae.com; bldg-sim at lists.onebuilding.org
	Received: 3/23/2010 5:24:39 PM
	Subject: Re: [Bldg-sim] Apendix G3.1.2.9

	No, you use only the fan supply cfm to calculate the total fan
power, then cut that fan power up into supply, return, etc.

	Best Regards,

	Gregg Liddick, EIT, LEED(r) AP 

	The Epsten Group, Inc. 

	429 Edgewood Avenue 

	Atlanta GA 30312 

	Phone: 404-577-0370  ext. 102 

	Fax: 404-577-1739 

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

	Please consider the environment before printing this e-mail. 

	This transmission is intended exclusively for the individual or
entity to which it is addressed. This communication may contain
information that is confidential, proprietary, privileged or otherwise
exempt from disclosure. If you are not the named addressee, you are NOT
authorized to read, print, retain, copy or disseminate this
communication, its attachments or any part of them. If you have received
this communication in error, please notify the sender immediately and
delete this communication from all computers. This communication does
not form any contractual obligation on behalf of the sender, the
sender's employer, or the employer's parent company, affiliates or
subsidiaries. 

	From: bldg-sim-bounces at lists.onebuilding.org
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Fareed Syed
	Sent: Tuesday, March 23, 2010 5:11 PM
	To: bldg-sim at lists.onebuilding.org
	Subject: [Bldg-sim] Apendix G3.1.2.9

	Hello All,

	I am trying to understand the stated appendix for the baseline
model. 

	When I am calculating the Pfan for a system, do I need add up
supply, return, system and room exhaust cfm's? 

	I got this comment from GBCI: "Revise the sum of the supply,
return, exhaust, and relief fans for each HVAC system to be equal to the
volume calculated in G3.1.2.8 and power calculated in G3.1.2.9 (where
CFM refers to supply air volume)." 

	Please let me know your input on how to calculate Pfan.

	Thanks,

	Fareed Syed EIT, LEED(r) AP

	Mechanical Engineer 

	1811 4 Mile Rd NE
	Grand Rapids, MI  49525

	Phone: 616.361.2664 ext. 3247
	Direct: 616.447.3447
	Fax: 616.361.1493 

	syedf at progressiveae.com
	www.progressiveae.com <http://www.progressiveae.com/> 

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