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

Applying the Concepts of Efficiency and Effectiveness to Analyze the Influence of the Number of Passes in the Shell and Tubes Condenser Thermal Performance

Author(s): Nogueira E.

Affiliation(s): Department of Mechanics and Energy, State University of Rio de Janeiro, R. São Francisco Xavier, 524 Maracanã, Rio de Janeiro, 20550-013 Brazil.

*Corresponding Author’s Address:

Issue: Volume 8, Issue 1 (2021)

Received: December 9, 2020
The final version received: April 24, 2021
Accepted for publication: May 1, 2021

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

DOI: 10.21272/jes.2021.8(1).f1

Research Area:  CHEMICAL ENGINEERING: Processes in Machines and Devices

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.

Keywords: heat exchange, refrigerant, tube condenser, thermal performance.


  1. Lee, T.-S., and Mai, J.-W. (2011). Modeling and Simulation of the Heat Transfer Behavior of a Shell-and-Tube Condenser for a Moderately High-Temperature Heat Pump. In: Ahsan, A., Ed., Two-Phase Flow, Phase Change and Numerical Modeling, InTech, Department of Energy and Refrigerating Air-Conditioning Engineering, National Taipei University of Technology, Chinese Taipei.
  2. Nogueira, E. (2020). Theoretical Analysis of a Shell and Tubes Condenser with R134a Working Refrigerant and Water-Based Oxide of Aluminum Nanofluid (Al2O3). Journal of Materials Science and Chemical Engineering, Vol. 8, pp. 1–22,
  3. Bejan, A. (1987). The Thermodynamic Design of Heat and Mass Transfer Processes and Devices. Heat and Fluid Flow, Vol. 8, pp. 258–276,
  4. Fakheri, A. (2007). Heat Exchanger Efficiency. Transactions of the ASME, Vol. 129, pp. 1268–1276.
  5. Tiwari, R., Maheshwari, G. (2017). Effectiveness and Efficiency Analysis of Parallel Flow and Counter Flow Heat Exchangers. IJAIEM, Vol. 6, pp. 314–319.
  6. Hermes, C.J. L. (2012). Thermodynamic Design of Condensers and Evaporators: Formulation and Applications. International Refrigeration and Air Conditioning Conference at Purdue, July 16–19, pp. 1–9.
  7. Nogueira, E. (2020) Thermal Performance in Heat Exchangers by the Irreversibility, Effectiveness, and Efficiency Concepts Using Nanofluids. Journal of Engineering Sciences, 7, F1-F7.
  8. Nogueira, E. (2020). Efficiency and Effectiveness Concepts Applied in Shell and Tube Heat Exchanger Using Ethylene Glycol-Water Based Fluid in the Shell with Nanoparticles of Copper Oxide (CuO). Journal of Materials Science and Chemical Engineering, Vol. 8, pp. 1–12, https//
  9. Dalkilic, A. S., Wongwises, S. (2011). Two-Phase Heat Transfer Coefficients of R134a Condensation in Vertical Downward Flow at High Mass Flux, Heat Transfer – Theoretical Analysis, Experimental Investigations, and Industrial Systems. In: Prof. Aziz Belmiloudi (Ed.), ISBN: 978-953-307-226-5, InTech, Available from:
  10. Roy, R., and Mandal, B.K. (2014). Computer-Based Thermodynamic Properties of Alternative Refrigerant R-134a. Engineering Sciences International Research Journal, Vol. 2, pp. 163–169.
  11. Wen, J., Gu, X., Wang, S., Li, Y., Tu, J. (2017). Numerical investigation on condensation heat transfer and pressure drop characteristics of R134a in horizontal flattened tubes. International Journal of Refrigeration,
  12. Kaew-On, J., Naphattharanun, N., Binmud, R., Wongwises, S. (2016). Condensation heat transfer characteristics of R134a flowing inside mini circular and flattened tubes. International Journal of Heat and Mass Transfer, Vol. 102, pp. 86–97,
  13. Albadr, J., Tayal, S., Alasadi, M. (2013). Heat transfer through heat exchanger using Al2O3 nanofluid at different concentrations. Case Studies in Thermal Engineering, Vol. 1(1), pp. 38–44,
  14. Almurtaji, S., Ali, N., Teixeira, J. A., Addali, A. (2020). On the Role of Nanofluids in Thermal-Hydraulic Performance of Heat Exchangers – A Review. Nanomaterials, Vol. 10, pp. 2–43,

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