TY - NEWS
TI - Thermohydraulic and Economic Evaluation of a New Design for Printed Circuit Heat Exchangers in Supercritical CO2 Brayton Cycle
AU - Villada Castillo, Dora Clemencia
AU - Valencia, Guillermo
AU - Duarte Forero, Jorge
AB - The present study focused on the analysis of a new geometrical modification of the
conventional zig-zag channel for Printed Circuit Heat Exchangers. The research was carried out
using OpenFOAM and Salome software, which were used for the CFD analysis and the construction
of the computational domain. For the development of the study, three types of channel geometries
were defined: a modified zig-zag channel, a conventional zig-zag channel, and a straight channel.
The results show that the modified zig-zag channel achieves better thermal hydraulic performance
compared to that of the conventional zig-zag channel, evidenced by a 7.6% increase in the thermal
performance factor. The modified zig-zag channel proposed in the research caused a 1.5% reduction
of the power consumption of supercritical Brayton cycle compressors. Additionally, the modified
zig-zag channel achieves a maximum efficiency of 49.1%, which is 1.5% higher compared to that
of the conventional zig-zag channel. The above results caused a 20.9% reduction of the operating
costs of the supercritical Brayton cycle. This leads to a 5.9% decrease in the cost associated with
using the PCHE compared to that of the conventional zig-zag channel. In general, the new geometric
characteristics proposed for the conventional zig-zag channel minimize the high loss of the hydraulic
performance without significantly compromising its heat transfer capacity. The geometric analysis
of the proposed new zig-zag channel geometry was limited to evaluating the influence of the bend
angle of 20–30◦
. Therefore, a more detailed geometric optimization process involving other geometric
parameters of the channel is still needed. Future research will be focused on addressing this approach
DA - 2023-02-28
KW - CFD
KW - cost design analysis
KW - printed circuit heat exchanger
KW - thermal hydraulic performance
PB - Energies
UR - https://repositorio.ufps.edu.co/handle/ufps/6783
ER -