[Equest-users] [Bldg-sim] Low heating consumption in Equest

[Gal, Amandine]

Thanks Luka for your information. 
I don't have high unmet heating loads. It is my problem. It seems that everything is ok but I have as you said around 10% heating consumption of the total energy consumption (really not normal in Montreal). 
 
I really thank the persons who answered me. I will follow searching what happen. 
Regards
 

Amandine Gal 

Spécialiste en ingénierie

Division Transport, Infrastructures et Bâtiment

 

SNC-Lavalin inc.

8000 boul. Décarie, 3e étage 

Montréal (Québec)

Canada  H4P 2S4

Téléphone:  514-735-5651 poste 2346

Télécopieur:  514-737-7988

Courriel:  amandine.gal at snclavalin.com <blocked::mailto:amandine.gal at snclavalin.com> 

www.snclavalin.com <blocked::http://www.snclavalin.com/> 

 

________________________________

De : Matutinovic, Luka [mailto:LMatutinovic at halsall.com] 
Envoyé : 1 octobre 2009 14:18
À : Gal, Amandine; James Hansen; bldg-sim at lists.onebuilding.org
Objet : RE: [Bldg-sim] Low heating consumption in Equest


Amandine,
 
I haven't ran the file and looked into possible issues so I'm afraid I can't offer any concrete solutions, but something seemed a little odd with the results.  Based on the screenshot of the end use breakdown it appears that heating represents approx. 10% of the total energy use, which I think is too low for a building in Montreal.  My experience with buildings in a "comparable" Toronto climate is that heating typically represents between 40-60% of the total energy, depending on the efficiency measures.  Are you getting significant unmet heating loads?
 
Also, when simulating buildings with VAV systems I've often seen reheat energy show up in the shoulder seasons and even in the summer, depending on the controls.  However it may be that due to the details of your system and controls, you don't have this issue. 
 
Cheers,
 

Luka Matutinovic, B.A.Sc., LEED® AP

Green Building Consultant / Energy Specialist
 
T. 416.644.0649

F. 416.487.9766  
Toll Free 1.888.425.7255
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From: bldg-sim-bounces at lists.onebuilding.org [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Gal, Amandine
Sent: Thursday, October 01, 2009 1:29 PM
To: James Hansen; bldg-sim at lists.onebuilding.org
Subject: Re: [Bldg-sim] Low heating consumption in Equest


I have a delta T of 10°C only, because condensing boiler will be installed. 
 
I forgot to tell you that the building is located in Montreal. So, do you still think that the heating consumption is not too low?
 
Thank you very much for your time.
 
regards
 

Amandine Gal 

Spécialiste en ingénierie

Division Transport, Infrastructures et Bâtiment

 

SNC-Lavalin inc.

8000 boul. Décarie, 3e étage 

Montréal (Québec)

Canada  H4P 2S4

Téléphone:  514-735-5651 poste 2346

Télécopieur:  514-737-7988

Courriel:  amandine.gal at snclavalin.com <blocked::mailto:amandine.gal at snclavalin.com> 

www.snclavalin.com <blocked::http://www.snclavalin.com/> 

 

________________________________

De : James Hansen [mailto:JHANSEN at ghtltd.com] 
Envoyé : 1 octobre 2009 12:20
À : Gal, Amandine; bldg-sim at lists.onebuilding.org
Objet : RE: [Bldg-sim] Low heating consumption in Equest



I just ran it and got the following outputs.

 

1250 therms in January seems about right for a 70,000 square foot building with a 59 degree setback temperature and a boiler heating input ratio of 1.0 and wall/roof U-values approaching 0.03.  

 

By the way, your delta T on your hot water loop is only 10 degrees, which seems low unless you're doing this for a reason. 

 

 

 

 

 

 

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James Hansen, PE, LEED AP

Senior Associate

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From: bldg-sim-bounces at lists.onebuilding.org [mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Gal, Amandine
Sent: Thursday, October 01, 2009 11:38 AM
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] Low heating consumption in Equest

 

Hello, 

 

I send few days ago a query concerning a model of a building with DDS and VAV system. 

 

I am sorry to insist but it is crucial for the LEED certification process of this building to manage good results of the Proposed building. 

 

I didn't have so much problem to model the Baseline building model. But concerning the Proposeb building model, it gives me a heating consumption so low that it is impossible that my model is right. 

 

So, I send you the files and I hope someone will find what happen. I check in the Bldg-sim]archives but DDS is not an usual system (because of its price) and I could'nt find any answer. 

 

I really need you help...

 

Thank you 

Regards

 

 

 

Amandine Gal 

Spécialiste en ingénierie

Division Transport, Infrastructures et Bâtiment

 

SNC-Lavalin inc.

8000 boul. Décarie, 3e étage 

Montréal (Québec)

Canada  H4P 2S4

Téléphone:  514-735-5651 poste 2346

Télécopieur:  514-737-7988

Courriel:  amandine.gal at snclavalin.com

www.snclavalin.com

 

 

________________________________

De : Gal, Amandine 
Envoyé : 24 septembre 2009 14:41
À : bldg-sim at lists.onebuilding.org
Objet : [Bldg-sim] DDS too low gas consumption in Equest

 

Hi, 

 

I am modelling a new building with a DDS system  for the peripheric zones and a VAV for the internal zones and I have a too low gas consumption for heating.

I tried almost everything but I didn't find what happen.

 

I send you the file. 

 

Thank you for your help.

 

Regards

 

Amandine Gal 

Spécialiste en ingénierie

Division Transport, Infrastructures et Bâtiment

 

SNC-Lavalin inc.

8000 boul. Décarie, 3e étage 

Montréal (Québec)

Canada  H4P 2S4

Téléphone:  514-735-5651 poste 2346

Télécopieur:  514-737-7988

Courriel:  amandine.gal at snclavalin.com

www.snclavalin.com

 

________________________________

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