TITLE:
Steady-State Modeling of Heat Transfer on the Recovery System of Condensing Boiler
AUTHORS:
Joachim Ntonda, Frederic Lontsi, Francois Njock Bayock
KEYWORDS:
Heat Recovery, Steady-State, Numerical Discrete Model
JOURNAL NAME:
Journal of Power and Energy Engineering,
Vol.9 No.7,
July
20,
2021
ABSTRACT: The increase of energy production is very important
nowadays. It is necessary to improve the performance and efficiency of heat
production facilities. The objective is to reduce pollutant emissions and
regulate investment costs. One of the solutions is to
control fuel and electricity consumption. This article develops a new model of
simulation heat diffusion on the recovery system of condensing boiler. The
method is based on the first and second thermodynamic systems. The Numerical
discrete Model (NDM) was applied using MATLAB to simulate different
characteristics of heat transfer in the recovery system. The result shows that
the recovery unit can absorb the following temperatures; the range from 88°C
to 90.7°C when the length of the tube is between respectively 110 and
111 m. the energy efficiency was between 0.55 and 0.57 which allowed confirming
the model. This new model has some advantages such as; the use of an
instantaneous calculation time. The heat recovered by the water tank can also
serve as preheating different systems. One part of the heat recovered will be
accumulated to be used as domestic hot water.