The Possibility of Intermittent Water Spray Implementation in a Non-Porous Indirect Evaporative Cooler

Łukasz Stefaniak (), Juliusz Walaszczyk, Michał Karpuk, Krzysztof Rajski and Jan Danielewicz
Additional contact information
Łukasz Stefaniak: Faculty of Environmental Engineering, Wrocław University of Science and Technology, 50377 Wrocław, Poland
Juliusz Walaszczyk: Faculty of Environmental Engineering, Wrocław University of Science and Technology, 50377 Wrocław, Poland
Michał Karpuk: Faculty of Environmental Engineering, Wrocław University of Science and Technology, 50377 Wrocław, Poland
Krzysztof Rajski: Faculty of Environmental Engineering, Wrocław University of Science and Technology, 50377 Wrocław, Poland
Jan Danielewicz: Faculty of Environmental Engineering, Wrocław University of Science and Technology, 50377 Wrocław, Poland

Energies, 2025, vol. 18, issue 4, 1-18

Abstract: Evaporative cooling is a sustainable and energy-efficient technology based on water evaporation to achieve cooling. It uses air (R-729) and water (R-718) as refrigerants, so its effect on global warming is limited. Recent research focuses development of porous heat exchanger surfaces to be used in evaporative cooling technology with intermittent water spray. However, non-porous surfaces were not investigated. Here, we present the possibility of implementing intermittent water spray in a non-porous indirect evaporative cooler. The experimental results show that it increases the cooling capacity when compared to the constant water spray for chosen outdoor air parameters (20–30 °C and 40–50% relative humidity). Also, the time after the outlet air temperature achieves minimum value (4–6 min) is presented for a certain non-porous heat exchanger. The maximum cooling capacity obtained without spraying is 25–64% higher than the cooling capacity in steady-state conditions under constant water spraying. The regression model approach is employed to describe the observation. The results introduce a new path in evaporative cooling technology development. They also create the possibility of improving the effectiveness of existing systems by modifying only the water system management, without any changes in construction or replacing the heat exchanger.

Keywords: air conditioning; natural refrigerants; sustainable cooling; cooling performance; energy efficiency (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: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/18/4/882/pdf (application/pdf)
https://www.mdpi.com/1996-1073/18/4/882/ (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:4:p:882-:d:1589844

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

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