[Bldg-sim] Modelling oil-fired systems with different COPs in Designbuilder (Simple HVAC)

[David Cocking]

Apeksha,

 

It might just be a case of misinterpreting the results...I would advise
checking the "simulation detailed results" descriptions in the help file.
The zone heating is the heat input to the zone from the zone emitters, not
the energy consumed by the plant. You should find that your energy
consumption at building level changes with a change in plant efficiency
(providing all else remains equal).

 

Hope that helps,

 

Dave

 

David Cocking 

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From: Gupta, Apeksha [mailto:GuptaA at bre.co.uk] 
Sent: 11 September 2012 14:35
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] Modelling oil-fired systems with different COPs in
Designbuilder (Simple HVAC)

 

Hello All,

I'm trying to compare two oil boilers with different COPs. One is 55%
efficient and the other 82% efficient. I'm using the Simple HVAC model,
however the results for Zone heating (kWh) do not change for the two
boilers. All other parameters of the building remain the same. One would
expect the lower efficiency boiler to perform more leading to a higher
energy consumption to a higher efficiency boiler. Has anyone come across
this in simulations? Can't understand what I am doing incorrectly.

 

Regards,

Apeksha

 

Apeksha Gupta MSc

Renewable Energy KTP Associate

BRE Wales & South West

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