Commenced in January 2007
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Edition: International
Paper Count: 31172
Numerical Calculation of Heat Transfer in Water Heater

Authors: Michal Spilacek, Martin Lisy, Marek Balas, Zdenek Skala


This article is trying to determine the status of flue gas that is entering the KWH heat exchanger from combustion chamber in order to calculate the heat transfer ratio of the heat exchanger. Combination of measurement, calculation and computer simulation was used to create a useful way to approximate the heat transfer rate. The measurements were taken by a number of sensors that are mounted on the experimental device and by a thermal imaging camera. The results of the numerical calculation are in a good correspondence with the real power output of the experimental device. That result shows that the research has a good direction and can be used to propose changes in the construction of the heat exchanger, but still needs enhancements.

Keywords: heat exchanger, heat transfer rate, thermal images, numerical calculation

Digital Object Identifier (DOI):

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[1] M. Spilacek, “Experimental Device for Multi-Stage Combustion of Very Wet Biomass”, ANNALS of Faculty Engineering Hunedoara – International Journal of Engineering, 2014, available on-line: (
[2] J. Kois,“Computational Model of Kwh Boiler” available online: e_id=86875
[3] T. Dlouhý, “Výpočtykotlů a spalovacíchvýměníků (Calculations of Boilers and Heat Exchangers)”, Praha, ČVUT, 2002. ISBN: 80-01- 02591-8.
[4] A. Demirbas, “CombustionCharacteristics of DifferentBiomassFuels“, Progress in Energy and Combustion Science, 2004, Volume 30, p. 219- 230.
[5] F. Incropera et al, “Fundamentals of Heat and Mass Transfer”, New York: John Wiley, 2007, ISBN: 04-714-5728-0.