Spray Angle on the Performance of Split-Type AC Condenser Installed on Concrete Rooftop in Tropical Climate
| Dublin Core | PKP Metadata Items | Metadata for this Document | |
| 1. | Title | Title of document | Spray Angle on the Performance of Split-Type AC Condenser Installed on Concrete Rooftop in Tropical Climate |
| 2. | Creator | Author's name, affiliation, country | Kennedy Kennedy; Tadulako University; Indonesia |
| 2. | Creator | Author's name, affiliation, country | I N Frenki Aryana; Tadulako University; Indonesia |
| 2. | Creator | Author's name, affiliation, country | Basri Basri; Tadulako University; Indonesia |
| 3. | Subject | Discipline(s) | Mechanical Engineering; Thermal Engineering |
| 3. | Subject | Keyword(s) | spray cooling, nozzle angle, air-cooled condenser, rooftop AC unit, COP, energy efficiency, tropical climate |
| 3. | Subject | Subject classification | Air-cooled condenser, COP, intermittent cooling, nozzle angle, spray cooling, tropical climate |
| 4. | Description | Abstract | This study investigated the influence of different water spray angles (0°, 15°, and 30°) on the thermal and energy performance of a split-type air-conditioning (AC) condenser installed on a concrete rooftop in a tropical climate. An experimental setup was designed to replicate actual concrete rooftop conditions, focusing on the condenser inlet temperature, compressor power consumption, and system coefficient of performance (COP). A 6-minute ON and 6-minute OFF intermittent spray cycle was employed to optimise water usage and minimise excessive humidity. Experimental measurements were conducted on a 9,000 Btu/h split-type unit equipped with a nozzle system connected to a 200 L water tank. The results demonstrated that the 0° spray angle achieved the most significant improvement, reducing the condenser inlet air temperature by up to 22.5% and decreasing the compressor power consumption by 7.7% compared with the baseline. This configuration also enhanced the COP from 2.77 to 2.93, representing a 5.8% improvement in performance. Wider spray angles (15° and 30°) yielded moderate improvements but were less effective because of droplet dispersion and reduced surface wetting. Thermal imaging confirmed that the 0° angle produced the most uniform cooling distribution on the condenser surface. These findings underscore that spray cooling with an optimised nozzle orientation is a cost-effective and sustainable retrofit solution for rooftop AC condensers in tropical environments, offering improved energy efficiency and reduced environmental impact. |
| 5. | Publisher | Organizing agency, location | Universitas Negeri Malang |
| 6. | Contributor | Sponsor(s) | Tadulako University; Thermofluids Lab, Department of Mechanical Engineering |
| 7. | Date | (YYYY-MM-DD) | 2025-10-17 |
| 8. | Type | Status & genre | Peer-reviewed Article |
| 8. | Type | Type | |
| 9. | Format | File format | |
| 10. | Identifier | Uniform Resource Identifier | https://journal2.um.ac.id/index.php/jmest/article/view/62475 |
| 10. | Identifier | Digital Object Identifier (DOI) | http://dx.doi.org/10.17977/um016v9i22025p451 |
| 11. | Source | Title; vol., no. (year) | Journal of Mechanical Engineering Science and Technology (JMEST); Vol 9, No 2 (2025) |
| 12. | Language | English=en | en |
| 13. | Relation | Supp. Files | |
| 14. | Coverage | Geo-spatial location, chronological period, research sample (gender, age, etc.) | |
| 15. | Rights | Copyright and permissions |
Copyright (c) 2025 Journal of Mechanical Engineering Science and Technology (JMEST) This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License. |