[Trace-users] Part load conditions

Thu Jan 24 10:59:03 PST 2013

Catalina,

The check box for "Apply ECB/PRM rules to fan sizing?" just sets the design fan power.  The fan curve must be applied separately as I showed on the "Fans" tab under Systems section of Trace.  Every project will have the exact same baseline fan curve, but the design fan power for the baseline is unique for each project, and that checkbox allows the program to calculate it rather than you doing it manually.  I leave it up to you as whether you trust the output from Trace or not on the fan power design power.  You can see the originally input value and the corrected kW value for each fan on the Equipment Energy Consumption report if you allow Trace to calculate the fan power.

Scott

From: Caballero, Catalina [mailto:ccaballero at jalrw.com]
Sent: Thursday, January 24, 2013 9:44 AM
To: Scott Parker; trace-users at lists.onebuilding.org
Cc: Varghese, Saju
Subject: RE: Part load conditions

Scott,

What we have seen is that the Trace700 PRM Sizing works correctly  and you just need to submit the PRM report but I don't know if that particular requirement for  G3.1.3.15 Part 2 can be done using it.

Thanks.

Catalina Caballero, AIA. Assoc., LEED GA.
Johnson, Avedano, Lopez, Rodriguez & Walewski
Engineering Group, Inc.

2510 NW 97th Avenue, Suite 220, Miami, Florida 33172
Tel. (305) 594-0660 Ext. 217 Fax (305) 594-0907

Visit us online: www.jalrw.com<http://www.jalrw.com/>

[JALRW Logo]

HVAC - Electrical - Plumbing - Fire Protection
Sustainable Development - Commissioning

This email and any files transmitted with it are confidential and are intended solely for the use of the individual or entity to which they are addressed. If you are not the intended recipient or the person responsible for delivering the email to the intended recipient, be advised that you have received this email in error and that any use, dissemination, forwarding, printing, or copying of this email is strictly prohibited.

From: Scott Parker [mailto:sparker at aeieng.com]
Sent: Thursday, January 24, 2013 9:15 AM
To: Caballero, Catalina; trace-users at lists.onebuilding.org<mailto:trace-users at lists.onebuilding.org>
Subject: RE: Part load conditions

Catalina,

I would guess that you are working on a LEED project.  From my experience the LEED reviewer will not accept the automatic fan calculation within Trace.  You need to manually calculate the maximum break HP for each fan for the baseline systems.  I recommend putting them in units of kW/CFM.  You will need to manually do the fan power calculations according to 90.1 and adjust for any "allowances" per 90.1.  Please don't use the Full Load Energy Rate numbers I have used.  You'll need to calculate these for your specific conditions per 90.1 requirements.
[cid:image002.png at 01CDFA3A.C7EBD0E0]
Scott

From: Caballero, Catalina [mailto:ccaballero at jalrw.com]
Sent: Thursday, January 24, 2013 9:03 AM
To: Scott Parker; trace-users at lists.onebuilding.org<mailto:trace-users at lists.onebuilding.org>
Subject: RE: Part load conditions

Can the software calculate it automatically with the following feature on?

[cid:image003.png at 01CDFA3A.C7EBD0E0]

Regards,

Catalina

From: Scott Parker [mailto:sparker at aeieng.com]
Sent: Thursday, January 24, 2013 9:01 AM
To: Caballero, Catalina; trace-users at lists.onebuilding.org<mailto:trace-users at lists.onebuilding.org>
Subject: RE: Part load conditions

Catalina,

You can define a custom fan curve based on the 90.1 cubic equation, but I would recommend that you use the 90.1 fan curve library member that comes with the program.  The curve is the same for 2004 and 2007 versions of 90.1.

[cid:image004.png at 01CDFA3A.C7EBD0E0][cid:image005.jpg at 01CDFA3A.C7EBD0E0]
Scott

From: trace-users-bounces at lists.onebuilding.org<mailto:trace-users-bounces at lists.onebuilding.org> [mailto:trace-users-bounces at lists.onebuilding.org] On Behalf Of Caballero, Catalina
Sent: Thursday, January 24, 2013 8:53 AM
To: trace-users at lists.onebuilding.org<mailto:trace-users at lists.onebuilding.org>
Subject: [Trace-users] Part load conditions

Hi all,

How do you show this method on Trace 700 for System 6?

[cid:image006.png at 01CDFA3A.C7EBD0E0]

Thanks,

Catalina Caballero, AIA. Assoc., LEED GA.
Johnson, Avedano, Lopez, Rodriguez & Walewski
Engineering Group, Inc.

2510 NW 97th Avenue, Suite 220, Miami, Florida 33172
Tel. (305) 594-0660 Ext. 217 Fax (305) 594-0907

Visit us online: www.jalrw.com<http://www.jalrw.com/>

[JALRW Logo]

HVAC - Electrical - Plumbing - Fire Protection
Sustainable Development - Commissioning

This email and any files transmitted with it are confidential and are intended solely for the use of the individual or entity to which they are addressed. If you are not the intended recipient or the person responsible for delivering the email to the intended recipient, be advised that you have received this email in error and that any use, dissemination, forwarding, printing, or copying of this email is strictly prohibited.

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