Impact of Nano Additives in Heat Exchangers with Twisted Tapes and Rings to Increase Efficiency: A Review

Younus Hamoudi Assaf, Abdulrazzak Akroot (), Hasanain A. Abdul Wahhab (), Wadah Talal, Mothana Bdaiwi and Mohammed Y. Nawaf
Additional contact information
Younus Hamoudi Assaf: Department of Mechanical Engineering, Faculty of Engineering, Karabük University, 78050 Karabük, Turkey
Abdulrazzak Akroot: Department of Mechanical Engineering, Faculty of Engineering, Karabük University, 78050 Karabük, Turkey
Hasanain A. Abdul Wahhab: Training and Workshop Center, University of Technology-Iraq, Ministry of Higher Education & Scientific Research, Baghdad 10066, Iraq
Wadah Talal: Department of Mechanical Engineering, Faculty of Engineering, Karabük University, 78050 Karabük, Turkey
Mothana Bdaiwi: Department of Mechanical Engineering, Faculty of Engineering, Karabük University, 78050 Karabük, Turkey
Mohammed Y. Nawaf: Department of Mechanical Engineering, Faculty of Engineering, Karabük University, 78050 Karabük, Turkey

Sustainability, 2023, vol. 15, issue 10, 1-17

Abstract: The heat exchanger is crucial to all systems and applications that use it. Researchers are primarily focused on improving this component’s thermal conductivity to improve its efficiency. This was achieved by using one or more of the following strategies: inserting tapes with various shapes and numbers, inserting rings of various shapes and spacing between each, and transforming a basic liquid into a nanoliquid by adding nanomaterials with high conductivity and ultra-small particle sizes. Different types of nanomaterials were added in varying concentrations. In earlier studies, it was found that every increase in heat transfer was accompanied by a pressure drop at both ends of the exchanger. The amount of heat transferred and the pressure drop are affected by many factors, such as the torsion tape ratio, the pitch of the ring, and whether the pitch faces the direction of flow or not. Heat transfer rates can also be impacted by factors such as the length and angle of the wings, how many rings and tapes there are, and whether the rings and tapes contain holes or wings. In addition, the Reynolds number, the type, conductivity, and size of nanomaterials, and the base fluid used in the nanofluid affect this. It is possible for the shape of the exchanger tube, as well as varying rates of rise, to introduce such impacts. In this study, the factors, costs, and benefits of using any technology to increase the efficiency of the heat exchanger are reviewed so that the user can make an informed decision about the technology to use.

Keywords: heat exchanger; twisted tape; insert rings; Nusselt number; nanofluid (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/2071-1050/15/10/7867/pdf (application/pdf)
https://www.mdpi.com/2071-1050/15/10/7867/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jsusta:v:15:y:2023:i:10:p:7867-:d:1144501

Access Statistics for this article

Sustainability is currently edited by Ms. Alexandra Wu

More articles in Sustainability from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().