Theoretical Analysis of a Shell and Tubes Condenser with R134a Working Refrigerant and Water-Based Oxide of Aluminum Nanofluid (Al<sub>2</sub>O<sub>3</sub>)
- 1 Department of Mechanical and Energy of State University of Rio de Janeiro, FAT/UERJ, Resende, Brazil
Abstract
The article analyzes a shell and tube type condenser’s thermal performance using concepts of efficiency and effectiveness. Freon 134a is used as a coolant flowing through the shell. Water or water-based aluminum oxide nanoparticles are at relatively low saturation pressure in the tube. The condenser consists of 36 tubes divided into three central regions for analysis: superheated steam, saturated steam, and subcooled liquid. The three regions contain four tubes with three steps each, that is, 12 tubes. Region I, superheated steam, includes three horizontal baffles. Profiles of temperature, efficiency, and effectiveness are presented graphically for the three regions, with fixed refrigerant flow equal to 0.20 kg/s and fluid flow rate in the tube ranging from 0.05 kg/s to 0.40 kg/s. The experimental result for vapor pressure equal to 1.2 MPa and water flow equal to 0.41 kg/s was used as one of the references for the model’s physical compatibility.
- 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.
- Abd, A.A., Kareem, M.Q. and Naji, S.Z. (2018) Performance Analysis of Shell and Tube Heat Exchanger: Parametric Study. Case Studies in Thermal Engineering, 12, 563-568. https://doi.org/10.1016/j.csite.2018.07.009
- Saffarian, M.R., Fazelpour, F. and Sham, M. (2019) Numerical Study of Shell and Tube Heat Exchanger with Different Cross-Section Tubes and Combined Tubes. International Journal of Energy and Environmental Engineering, 10, 33-46. https://doi.org/10.1007/s40095-019-0297-9
- Syed, N.H., Qurat-ul-Ain, Habib, M., Khan, N.A. and Ali, S. (2018) A Systematic Study of the Influence of Process Variables on the Overall Heat Transfer Coefficient in a Shell and Tube Heat Exchanger. Journal of Engineering and Applied Sciences, 37, 53-60.
- Laskowski, R., Smyk, A., Rusowicz, A. and Grzebielec, A. (2016) Determining the Optimum Inner Diameter of Condenser Tubes Based on Thermodynamic Objective Functions and an Economic Analysis. Entropy, 18, 2-20. https://doi.org/10.3390/e18120444
- Nogueira, é. (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, 8, 1-12. https://doi.org/10.4236/msce.2020.88001
- Nogueira, E. (2020) Thermal Performance in Heat Exchangers by the Irreversibility, Effectiveness, and Efficiency Concepts Using Nanofluids. Journal of Engineering Sciences, 7, F1-F7.
- Roy, R. and Mandal, B.K. (2014) Computer Based Thermodynamic Properties of Alternative Refrigerant R-134a. Engineering Sciences International Research Journal, 2, 163-169.
- Oliveira, C.M.B.P. and Wakeham, W.A. (1999) Viscosity of R134a, R32, and R125 at Saturation. International Journal of Thermophysics, 20, 365-373. https://doi.org/10.1023/A:1022640617694
- Shankland, I.R., Basu, R.S. and Wilson, D.P. (1988) Thermal Conductivity and Viscosity of a New Stratospherically Safe Refrigerant-1, 1, 1, 2-Tetrafluoroethane (R-134A). International Refrigeration and Air Conditioning Conference, Paper 41, 56-64.