AW: [TRNSYS-users] condensing boiler model

[michel.haller at solarenergy.ch]

Dear Mr. Peeters
 
Just recently we developed such a model for TRNSYS16, we finished programming on it last week and it is under test now. The advantages of the models are:
 
-freedom to choose any fuel by means of mass weight of the elements and the lower heating value
-predefined fuels with standard mass weights and lower heating values for oil, natural gas and biomass
-possibility to simulate condensing technology
-consideration of heat losses to ambient (thermal mass of the boiler and delta-T to ambient)
 
Although the model can do all this, it is still quite simple and has therefore also some limits (one-node approach for the thermal mass of the boiler). At the moment, we are fitting measured data with the model and the results look quite good. We have not done all-year-simulations in a TRNSYS-environment yet. The model is not able to heat the boiler mass without mass flow of water (may be we'll include this later).
 
We can send you the model if you will communicate your experience with the model - especially if you run into troubles or don't find information you need in the description of the inputs and outputs.
 
Please tell us if you found any other TRNSYS-types that can do these things...
 
Sincerely
 
Michel Haller
 
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Michel Haller
Systemtechnik / System Division
Institut für Solartechnik SPF: Adresse <http://www.solarenergy.ch/spf.php?lang=de&fam=44&tab=3>  / Website <http://www.solarenergy.ch/spf.php?lang=de&fam=41&tab=1> 
Hochschule für Technik Rapperswil HSR
Tel. +41 55 222 48 29
Fax +41 55 222 48 44 
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________________________________

Von: Leen Peeters [mailto:leen.peeters at mech.kuleuven.ac.be] 
Gesendet: Donnerstag, 1. Dezember 2005 15:01
An: trnsys-users at engr.wisc.edu
Betreff: [TRNSYS-users] condensing boiler model


Dear all,
 
does someone have a 'simple' model of a condensing boiler that he/she could share? We're looking for a 'gray box' model. We want as inputs the inlet temperature, the desired outlet temperature and as output at least the effective outlet temperature and the gas consumption.
 
thanks,
 
Leen Peeters
Applied Mechanics and Energy
University of Leuven
Celestijnenlaan 300A
3001 Heverlee
Belgium
Phone +32-16-322.518


Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm <ttp://www.kuleuven.be/cwis/email_disclaimer.htm">  for more information. 


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