https://doi.org/10.1051/epjap/2020200192
Regular Article
Experimental study of thermohydraulic characteristics and irreversibility analysis of novel axial corrugated tube with spring tape inserts★
1
Center for Renewable Energy and Environment Development, Department of Mechanical Engineering, Birla Institute of Technology and Science Pilani, Pilani Campus, Vidhya Vihar, Pilani 333031, RJ, India
2
Department of Textile Technology, Government College of Engineering and Textile Technology, Berhampore, Murshidabad 742101, West Bengal, India
3
Department of Mathematics, Davangere University, Shivagangotri, Davangere 577 007, India
4
Department of Mechanical Engineering, Hindusthan College of Engineering and Technology, Coimbatore 641 032, Tamil Nadu, 14 India
* e-mail: suvanjan.bhattacharyya@pilani.bits-pilani.ac.in
Received:
19
June
2020
Received in final form:
10
September
2020
Accepted:
16
September
2020
Published online: 27 November 2020
The current study experimentally investigates the heat transfer augmentation on the novel axial corrugated heat exchanger tube in which the spring tape is introduced. Air (Pr = 0.707) is used as a working fluid. In order to augment the thermohydraulic performance, a corrugated tube with inserts is offered. The experimental study is further extended by varying the important parameters like spring ratio (y = 1.5, 2.0, 2.5) and Reynolds number (Re = 10 000–52 000). The angular pitch between the two neighboring corrugations and the angle of the corrugation is kept constant through the experiments at β = 1200 and α = 600 respectively, while two different corrugations heights (h) are analyzed. While increasing the corrugation height and decreasing the spring ratio, the impact of the swirling effect improves the thermal performance of the system. The maximum thermal performance is obtained when the corrugation height is h = 0.2 and spring ratio y = 1.5. Eventually, correlations for predicting friction factor (f) and Nusselt number (Nu) are developed.
© EDP Sciences, 2020
