Simplified analysis of heat transfer through a finned tube bundle in air cooled condenser

Simplified analysis of heat transfer through a finned tube bundle in air cooled condenser

Yanán Camaraza-MedinaÁngel M. Rubio-Gonzales Oscar M. Cruz-Fonticiella Osvaldo F. García-Morales 

Center of Energy Studies and Environmental Technology, Universidad Central de Las Villas, Santa Clara 54440, Cuba

Technical Sciences Faculty. Universidad de Matanzas.Matanzas 44440, Cuba

Corresponding Author Email: 
ycamaraza1980@yahoo.com
Page: 
237-242
|
DOI: 
https://doi.org/10.18280/mmep.050316
Received: 
11 July 2018
|
Accepted: 
27 July 2018
|
Published: 
30 September 2018
| Citation

OPEN ACCESS

Abstract: 

In this paper. is present a new model for heat transfer calculations during airflow through the finned tubes bank in air cooled condenser systems (ACC). The model was correlated with a total of 736 sets of available experimental data provided by ten authors of recognized prestige in the research area. The air flow bathes a package of finned tubes with an inclination of 450 to 600 with respect to the horizontal line. The studies were performed for ST/SL intervals between 0.4 and 2, air flow velocity of 0.1 to 20 m/s, an ambient temperature of 15 to 43 °C, the incident wind speed over the installation between 0 and 45 km/h, the outer equivalent diameter of the bare tubes between 0.019 and 0.035 m, a height of the fins between 2.7 and 7.5 mm. thicknesses of the fins ranging between 2.3 and 3 mm and a number of fins per unit tube length between 315 and 394. The mean deviation found was 6.5% in 84.8% of the correlated experimental data.

Keywords: 

airflow, heat transfer coefficient, fins tube bank

1. Introduction
2. Methods and Validation
3. Conclusions
Acknowledgment

This work was supported by Doctoral Research Program of Universidad Central “Marta Abreu” de las Villas, Cuba.

Nomenclature
  References

[1] Dorao CA, Fernandhino M. (2017). Dominant dimensionless groups controlling heat transfer coefficient during flow condensation inside pipes. International Journal of Heat and Mass Transfer 112: 465-479. https://doi.org/10.1016/j.ijheatmasstransfer.2017.04.104

[2] Boyko LD, Kruzhilin GN. (1967). Heat transfer and hydraulic resistance during condensation of Steam in a horizontal tube and in a bundle of tubes. International Journal of Heat and Mass Transfer 10(3): 361-373. https://doi.org/10.1016/0017-9310(67)90152-4

[3] Kim SM, Mudawar I. (2013). Universal approach to predicting heat transfer coefficient for condensing mini/micro-channel flow. International Journal of Heat and Mass Transfer 56(1–2): 238–250. http://dx.doi.org/10.1016/j.ijheatmasstransfer.2012.09.032 

[4] Medina YC, Khandy NH, Carlson KM, Fonticiella OMC, Morales OFG. (2018). Mathematical modeling of two-phase media heat transfer coefficient in air cooled condenser system. International Journal of Heat and Technology 36(1): 319-324. https://doi.org/10.18280/ijht.360142

[5] Medina YC, Khandy NH, Fonticiella OMC, Morales OFG. (2017). Abstract of heat transfer coefficient modelation in single-phase systems inside pipes. Mathematical Modelling of Engineering Problems 4(3): 126-131. https://doi.org/10.18280/mmep.040303

[6] Rifert VG, Sereda VV. (2015). Condensation inside Smooth horizontal tubes: Part 1. Survey of the methods of heat-exchange prediction. Thermal Science 19(5): 1769-1789. https://doi.org/10.2298/TSCI140522036R

[7] Thome JR. (2005). Condensation in plain horizontal tubes: Recent advances in modelling of heat transfer to pure fluids and mixtures. Journal of the Brazilian Society of Mechanical Sciences and Engineering 27(1): 23-30. http://dx.doi.org/10.1590/S1678-58782005000100002

[8] Cttani L, Bozzoli F, Raineri S. (2017). Experimental study of the transitional flow regime in coiled tubes by the estimation of local convective heat transfer coefficient. Intl Journal of Heat and Mass Transfer 112: 825-836. https://doi.org/10.1016/j.ijheatmasstransfer.2017.05.003 

[9] Bhagwat SM, Ghajar AJ. (2016). Experimental investigation of non-boiling gas-liquid two phase flow in upward inclined tubes. Exp Thermal and Fluid Science 79: 301–318. https://doi.org/10.1016/j.expthermflusci.2016.08.004

[10] Derby M, Joon H, Peles Y, Jensen MK. (2011). Condensation heat transfer in square, triangular, and semi-circular mini-channels. International Journal of Heat and Mass Transfer 55(1-3): 187–197. https://doi.org/10.1016/j.ijheatmasstransfer.2011.09.002

[11] Borishanskiy VM, Volkov DI, Ivashenko NI, Makarova GA, Illarionov T, Yu LA, Vorontsova LA, Alekseyev NI, Kretunov IOP. (1978). Heat transfer in steam condensing inside vertical pipes and coils. Heat Transfer Soviet Research 10(4): 44–58.

[12] Medina YC, Fonticiella OMC, Morales OFG. (2017). Design and modelation of piping systems by means of use friction factor in the transition turbulent zone. Mathematical Modelling of Engineering Problems 4(4): 162-167. https://doi.org/10.18280/mmep.040404

[13] Kezzar M. Tabet I. Chieul M. Nafir N. Khentout A. (2018). Analytical investigation of heat transfer of solar air collector by Adomian decomposition method. Mathematical Modelling of Engineering Problems 5(1): 40-45. https://doi.org /10.18280/mmep.050106

[14] Zhang W, Du X, Yang L, Yang Y. (2016). Research on performance of finned tube bundles of indirect air-cooled heat exchangers. Mathematical Modelling of Engineering Problems 3(1): 47-51. https://doi.org /10.18280/mmep.030108

[15] Camaraza Y. (2017). Introducción a la termotransferencia. Ed. Universitaria, La Habana, Cube. ISBN: 978-959-16-3286-9

[16] Camaraza-Medina Y, Khandy NH, Carlson KM, Cruz-Fonticiella OM, García-Morales OF, Reyes-Cabrera D. (2018). Evaluation of condensation heat transfer in air-cooled condenser by dominant flow criteria. Mathematical Modelling of Engineering Problems 5(2): 76-82. https://doi.org /10.18280/mmep.050204

[17] Rahim NA, Azudin NY, Shukor SRA. (2017). Computational fluid dynamic simulation of mixing in circular cross sectional microchannel. Chemical Engineering Transactions 56: 79-84. https://doi.org/10.3303/CET1756014

[18] Koh j ZZ, Veerasamy D. (2017). Overview of the use of hydrocarbon refrigerants in air conditioning systems. Chemical Engineering Transactions 56: 1849-1854. https://doi.org/10.3303/CET1756309