[en] The structure of the model is similar to the model of a conventional boiler model with a main counterflow gas-water heat exchanger (HX1), at which a condensing heat exchanger is added (HX2). The case losses to the ambient is neglected. Prior to the second heat exchanger (HX2), the exhaust gas are converted to equivalent wet air as the wet heat exchanger is simulated by a cooling coil used in air treatment. The model has been validated experimentally on gas- and oil-fired boilers. Calculated thermal efficiencies agree very well with experimental results.
Disciplines :
Energy
Author, co-author :
Makaire, Danielle ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Thermotechnique
Ngendakumana, Philippe ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Thermotechnique
Language :
English
Title :
Modelling the thermal efficiency of condensing boilers working in steady-state conditions
Publication date :
May 2010
Number of pages :
2
Event name :
21st "journées d'études" of the Belgian Section of the Combustion Institute
Event organizer :
Thermotechnique, Université de Liège
Event place :
Liège, Belgium
Event date :
from 10 to 11 May 2010
Audience :
International
Name of the research project :
COMBU-III-Ulg
Funders :
DGTRE - Région wallonne. Direction générale des Technologies, de la Recherche et de l'Énergie
