Next Article in Journal
Research on Resonance Mechanism and Suppression Technology of Photovoltaic Cluster Inverter
Next Article in Special Issue
An Optimisation Study on Integrating and Incentivising Thermal Energy Storage (TES) in a Dwelling Energy System
Previous Article in Journal
Investigation of In-Cylinder Steam Injection in a Turbocharged Diesel Engine for Waste Heat Recovery and NOx Emission Control
Previous Article in Special Issue
From Problems to Potentials—The Urban Energy Transition of Gruž, Dubrovnik
Article Menu
Issue 4 (April) cover image

Export Article

Open AccessFeature PaperArticle
Energies 2018, 11(4), 937; https://doi.org/10.3390/en11040937

Numerical Simulation of Flow and Heat Transfer in Structured Packed Beds with Smooth or Dimpled Spheres at Low Channel to Particle Diameter Ratio

Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education, School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China
*
Author to whom correspondence should be addressed.
Received: 1 March 2018 / Revised: 4 April 2018 / Accepted: 10 April 2018 / Published: 15 April 2018
Full-Text   |   PDF [19094 KB, uploaded 3 May 2018]   |  

Abstract

Packed beds are widely used in catalytic reactors or nuclear reactors. Reducing the pressure drop and improving the heat transfer performance of a packed bed is a common research aim. The dimpled structure has a complex influence on the flow and heat transfer characteristics. In the present study, the flow and heat transfer characteristics in structured packed beds with smooth or dimpled spheres are numerically investigated, where two different low channel to particle diameter ratios (N = 1.00 and N = 1.15) are considered. The pressure drop and the Nusselt number are obtained. The results show that, for N = 1.00, compared with the structured packed bed with smooth spheres, the structured packed bed with dimpled spheres has a lower pressure drop and little higher Nusselt number at 1500 < ReH < 14,000, exhibiting an improved overall heat transfer performance. However, for N = 1.15, the structured packed bed with dimpled spheres shows a much higher pressure drop, which dominantly affects the overall heat transfer performance, causing it to be weaker. Comparing the different channel to particle diameter ratios, we find that different configurations can result in: (i) completely different drag reduction effect; and (ii) relatively less influence on heat transfer enhancement. View Full-Text
Keywords: dimpled sphere; structured packed bed; low channel to particle diameter ratio; numerical simulation; pressure drop; Nusselt number dimpled sphere; structured packed bed; low channel to particle diameter ratio; numerical simulation; pressure drop; Nusselt number
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Li, S.; Zhou, L.; Yang, J.; Wang, Q. Numerical Simulation of Flow and Heat Transfer in Structured Packed Beds with Smooth or Dimpled Spheres at Low Channel to Particle Diameter Ratio. Energies 2018, 11, 937.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Energies EISSN 1996-1073 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top