Numerical Modelling of Compact High Temperature Heat Exchanger
For the numeric investigations of the high temperature compact heat exchanger two numeric models with and without the regards of the velocity field development were used. The results of the comparison of the numeric and experimental data confirm the necessity of regarding the velocity field development for the compact heat exchangers.
The two-dimensional simulation task with the regard of the inlet and outlet volume before and after the heat exchanger, which were calculated on the base of the second model, shows an inhomogeneous distribution of the hydraulic and thermal fields in the heat exchanger. The obtained results show a significant influence of the channel sizes change on the hydraulic and thermal characteristics of the researched heat exchanger.
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