Experimental Study on the Factors Influencing the Heat Transfer Coefficient of Vertical Tube Indirect Evaporative Coolers

Tiezhu Sun (), Guangyu Tian, Peixuan Li, Wenkang Li and Huan Sun
Additional contact information
Tiezhu Sun: School of Urban Planning and Municipal Engineering, Xi’an Polytechnic University, Xi’an 710048, China
Guangyu Tian: School of Urban Planning and Municipal Engineering, Xi’an Polytechnic University, Xi’an 710048, China
Peixuan Li: School of Urban Planning and Municipal Engineering, Xi’an Polytechnic University, Xi’an 710048, China
Wenkang Li: School of Urban Planning and Municipal Engineering, Xi’an Polytechnic University, Xi’an 710048, China
Huan Sun: School of Urban Planning and Municipal Engineering, Xi’an Polytechnic University, Xi’an 710048, China

Energies, 2025, vol. 18, issue 22, 1-19

Abstract: This study looks into the parameters that affect the heat transfer coefficient ( h 2 ) on the wet surfaces of vertical tube indirect evaporative coolers (VTIEC). An experimental platform was used to investigate the impact of secondary-to-primary airflow ratios (AFR) and spray water density on the HTC. The findings show that raising the primary air temperature drop, expanding the outside dry-bulb and wet-bulb temperature differences, and decreasing the air-to-water ratio improve heat transmission. The HTC of the wet sides ranged from 34.79 to 924.5 W/(m 2 ·°C) throughout testing. To achieve optimal performance, aim for a spray water density of 2.07 to 3.46 m 3 /(m 2 ·h), an AFR of 0.5 to 0.6, and a primary air temperature drop of at least 6 °C. These factors help keep the h 2 above 350 W/(m 2 ·°C).

Keywords: vertical tube indirect evaporative cooler; heat transfer coefficient; airflow ratio; water flow rate; water spraying density (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
References: Add references at CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/18/22/5967/pdf (application/pdf)
https://www.mdpi.com/1996-1073/18/22/5967/ (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:jeners:v:18:y:2025:i:22:p:5967-:d:1793847

Access Statistics for this article

Energies is currently edited by Ms. Cassie Shen

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