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

Gupta, Apeksha GuptaA at bre.co.uk
Tue Sep 11 06:34:44 PDT 2012


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
Ethos, Kings Road,
Swansea- SA1 8AS
T +44 1792 630 109 M +44 (0) 754 894 3314 E Guptaa at bre.co.uk<mailto:Guptaa at bre.co.uk>   W www.bre.co.uk<http://www.bre.co.uk/>
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