Numerical Investigation of the Concave-Cut Baffles Effect in Shell-and-Tube Heat Exchanger

Author(s): Petinrin M. O.*, Dare A. A.

Affiliation(s): University of Ibadan, Oduduwa Rd, 200284 Ibadan, Oyo State, Nigeria

*Corresponding Author’s Address: [email protected]

Issue: Volume 6; Issue 1 (2019)

Paper received: August 5, 2018
The final version of the paper received: December 24, 2018
Paper accepted online: December 29, 2018

Petinrin, M. O., Dare, A. A. (2019). Numerical investigation of the concave-cut baffles effect in shell-and-tube heat exchanger. Journal of Engineering Sciences, Vol. 6(1), pp. E1-E9, doi: 10.21272/jes.2019.6(1).e1

DOI: 10.21272/jes.2019.6(1).e1

Research Area:  MECHANICAL ENGINEERING: Computational Mechanics

Abstract. In this paper, the performance of shell-and-tube heat exchangers with single-segmental baffle and varying configurations of concave-cut baffles (10, 15 and 20 %) was investigated. The study was carried out for a heat exchanger having either engine oil, water and air as shell-side fluid. For each configuration of the baffles, the results of both the the k-ε and RNG k-ε turbulent models were in very close agreement. The heat exchangers with concave-cut baffles had higher pressure drops and lower performance factors than that of single-segmental baffle at the same range of mass flow rates for all fluid cases. Also, the concave-cut baffle heat exchangers had lower shell-side heat transfer coefficients at the same pressure drop against that of single-segmental baffles. Thus, the use of concave-cut baffles did not exhibit desirable performance in heat exchanger as compared with the segmental baffles.

Keywords: shell-and-tube heat exchanger, pressure drop, weighted performance factor, weighted heat transfer coefficient, concave-cut baffle.


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