Re: [EnergyPlus_Support] CONDENSING BOILER: IS IT POSSIBLE?

["Michael J. Witte" <mjwitte@xxxxxxxx>]

If you use the higher heating value (HHV) for natural gas, then a condensing 
boiler would never have an efficiency greater than 1.0.  Here in the USA, 
natural gas is purchased based on HHV, so the maximum of 1.0 is appropriate 
here.  All of the EnergyPlus example files assume HHV.  

If you wish to work with lower heating value (LHV), then you can edit the 
Energy+.idd file to change the maximum for the theoretical boiler efficiency.  
The IDD file should only be edited with caution.  

Mike


On 15 Dec 2003, at 14:41, meig81 wrote:

> How can I simulate a condensing boiler?
> I tried by putting an efficiency of 1,1 in the field "BOILER:SIMPLE" 
> but it must be contained  between 0 an 1.
> tell me....
> thanks a lot 
> Alessandro D'Amico
> 
> 
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========================================================
Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support      
EnergyPlus-Support@xxxxxxxx


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