Affiliation:
1. School of Mechanical and Electrical Engineering, Shaanxi University of Science and Technology, Xi'an, China
2. Key Laboratory of Optical System Advanced Manufacturing Technology, Chinese Academy of Sciences, Changchun, China + State Key Laboratory of Applied Optics, Chinese Academy of Sciences, Changchun, China
Abstract
In order to investigate the influence mechanism of various corrugated
structures on the heat transfer of continuous annular concave-convex
corrugated pipes, this paper examines the influence of corrugation height
(Ch=1, 1.5 and 2 mm) and corrugation width (Cw=1, 1.5 and 2 mm) on the flow
pattern, turbulent kinetic energy(TKE), Nusselt number (Nu), friction
coefficient (f), and performance evaluation factor (PEF). Then, the
correlation equations for Nu and f are established with different corrugated
structural parameters. The results show that with the increase of Ch, the
vortex number, TKE, and fin the pipe increase while Nude creases. The maximum
PEF is 0.90 at Ch=1 mm. However, with the increase of Cw, the vortex
number and Nuin the pipe increase, while TKE and fin the pipe do not change
much. The maximum PEF is 0.87 at Cw=2 mm. Therefore, for this type of
corrugated pipe, one should choose a small Chand a large Cw.
Publisher
National Library of Serbia
Subject
Renewable Energy, Sustainability and the Environment