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Title | Applying the concepts of efficiency and effectiveness to analyze the influence of the number of passes in the shell and tubes condenser thermal performance |
Authors |
Nogueira, E.
|
ORCID | |
Keywords |
heat exchange refrigerant tube condenser thermal performance |
Type | Article |
Date of Issue | 2021 |
URI | https://essuir.sumdu.edu.ua/handle/123456789/84256 |
Publisher | Sumy State University |
License | Creative Commons Attribution - NonCommercial 4.0 International |
Citation | Nogueira E. (2020). Applying the concepts of efficiency and effectiveness to analyze the influence of the number of passes in the shell and tubes condenser thermal performance. Journal of Engineering Sciences, Vol. 8(1), pp. F1–F10, doi: 10.21272/jes.2021.8(1).f1 |
Abstract |
The work analyzes the influence of the number of passes in a shell and tubes condenser heat
exchanger, with an inlet pressure of R134a refrigerant in the shell equal to 1.2 MPa. The fluid that circulates
in the tubes is water or water-based nanofluid with a fraction of aluminum oxide nanoparticles (Al2O3), and
the methodology used subdivides the heat exchanger into three distinct regions: the overheated region, the
saturated region, and the subcooled region. The main parameters used to analyze the thermal performance
of the heat exchanger were efficiency and effectiveness. Efficiency in the superheated steam region is close
to 1.0. There is scope for increasing thermal effectiveness, which can be improved with more significant
passes in the tube. The saturated steam region process is efficient for lower mass flow rates of the fluid in
the tube, but it is ineffective. However, it is highly effective for high mass flow rates. There is ample scope
for increasing effectiveness in the subcooled region. Still, the fluid inlet temperature in the pipe and the
work refrigerant pressure are the limiting factors for greater heat exchange in the subcooled region. |
Appears in Collections: |
Journal of Engineering Sciences / Журнал інженерних наук |
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