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Normalized Boiler Efficiency Curve for gas fired and biomass boilers

asked 2015-09-22 11:18:09 -0500

Waseem gravatar image

updated 2015-11-12 15:29:11 -0500

I am trying to model two different boilers (gas fired and biomass boilers). I have following data and was wondering if it is enough to model the normalized boiler efficiency curve. The models that I have installed are Hamworthy Fleet F350v700 (Gas boiler) and BioMatic 500 of RuralEnergy (Biomass boiler). Could anyone please throw some light on how to model efficiency curves with this amount of data?

Gas boiler

Biomass boiler

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answered 2015-09-22 12:06:27 -0500

You can't derive a boiler part load efficiency curve with just the nominal rated data for the boiler. Some boiler manufacturers do provide either graphs or tables that show the efficiency as a function of firing rate. Since the efficiency is above 82%, it is likely to be a condensing boiler. Unlike atmospheric boilers, condensing boilers are likely to be more efficient at part load. If more digging with that manufacturer won't provide more information, I would suggest you try to find something comparable from another manufacturer. With similar specs, boilers are not likely to be that different from each other.

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@JasonGlazer: Thanks for your answer. That's what I have got from manufacturer :( Do you know or anyone else has worked with something comparable so that I can use please? Also, for biomass boiler?

Waseem gravatar image Waseem  ( 2015-09-22 12:50:49 -0500 )edit

Sorry, I don't have anything at that efficiency point.

JasonGlazer gravatar image JasonGlazer  ( 2015-09-22 13:23:04 -0500 )edit

Thanks Jason. @Jamie Bull: May be you can have some information regarding curves for biomass and gas boilers or can guide me?

Waseem gravatar image Waseem  ( 2015-09-23 11:33:10 -0500 )edit

Have you seen this document? http://www.integratedheating.co.uk/re...

rraustad gravatar image rraustad  ( 2015-09-23 12:08:53 -0500 )edit

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Asked: 2015-09-22 11:18:09 -0500

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Last updated: Sep 22 '15