[Equest-users] Modulating furnace

[Aaron Smith]

Michael,

 

You could create a custom efficiency curve for the burner using manufacturer
data - Engineered Air has an efficiency curve for its 15:1 turndown burner,
refer to the attached.

 

Alternatively in Canada, our EE4 software uses the following curve fit data
which could be used to create a custom curve for modulating burners; I'm not
sure where they got this from though.

 

MODCURVE = CURVE-FIT TYPE = QUADRATIC

DATA =  (1,1) (0.9,0.901) (0.8,0.802)

        (0.7,0.704) (0.6,0.605) (0.5,0.506)

        (0.4,0.407) (0.3,0.308) (0.2,0.209)

        (0.1,0.11)  ..

 

Regards, 

Aaron

 

 

Aaron Smith, P.Eng 

M&R Engineering 

  _____  

From: Michael Campbell [mailto:mike at sustainablesolutionscorporation.com] 
Sent: Wednesday, March 12, 2014 4:49 PM
To: Hall, Brendan; equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] Modulating furnace

 

Thanks for the reply.  However, to clarify, this is an AHU with gas furnace
heat, so there is no boiler.

 

Mike Campbell, E.I.T., LEED AP O+M
Sustainability Specialist
Sustainable Solutions Corporation
Office: 610-569-1047 <http://610-569-1047/> 

Mobile: 609-923-1743 <http://610-569-1047/> 
www.SustainableSolutionsCorporation.com
<http://www.sustainablesolutionscorporation.com/> 
Sustainable Solutions Corporation is WBENC and BCorp Certified.

This email message and any attachments are for the sole use of the intended
recipient(s) and may contain confidential and privileged information. Any
unauthorized review, use, disclosure or distribution is prohibited. If you
are not the intended recipient, please contact the sender by reply email and
destroy all copies of the original message and any attachments.

 

From: Hall, Brendan [mailto:BHall at karpinskieng.com] 
Sent: Wednesday, March 12, 2014 3:45 PM
To: Michael Campbell; equest-users at lists.onebuilding.org
Subject: RE: [Equest-users] Modulating furnace

 

Under the boiler, set the min ratio = .06. 

 

Brendan Hall,  PE, LEED AP BD+C

Engineer, Mechanical

karpinski
ENGINEERING
3135 Euclid Avenue
Cleveland, OH  44115
P  216.391.3700 Ext 3111
E  bhall at karpinskieng.com
W www.karpinskieng.com <http://www.karpinskieng.com/> 

 

From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Michael
Campbell
Sent: Wednesday, March 12, 2014 3:41 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Modulating furnace

 

What is the appropriate way to model a gas furnace that modulates with a
16:1 turndown?

 

Thank you,

 

Mike Campbell, E.I.T., LEED AP O+M
Sustainability Specialist
Sustainable Solutions Corporation
Office: 610-569-1047 <http://610-569-1047/> 

Mobile: 609-923-1743 <http://610-569-1047/> 
www.SustainableSolutionsCorporation.com
<http://www.sustainablesolutionscorporation.com/> 
Sustainable Solutions Corporation is WBENC and BCorp Certified.

This email message and any attachments are for the sole use of the intended
recipient(s) and may contain confidential and privileged information. Any
unauthorized review, use, disclosure or distribution is prohibited. If you
are not the intended recipient, please contact the sender by reply email and
destroy all copies of the original message and any attachments.

 

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