Approaches to energy efficiency in air conditioning: A comparative study on purge configurations for indirect evaporative cooling. (1st February 2019)

• Record Type: Journal Article
• Authors: Oh, Seung Jin; Shahzad, Muhammad Wakil; Burhan, Muhammad; Chun, Wongee; Kian Jon, Chua; KumJa, M.; Ng, Kim Choon
• Is Part Of: Energy. Volume 168(2019)
• Page Start: 505
• Page End: 515
• Publication Date: 2019-02-01
• Subjects: Indirect evaporative cooler -- Dew-point evaporative cooler -- Cooling capacity -- Purge configuration -- Numerical simulation; Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Energy consumption -- Periodicals; 333.7905
• DOI: 10.1016/j.energy.2018.11.077
• Languages: English
• ISSNs: 0360-5442

Abstract

Abstract: This paper presents a mathematical model to enable a more in-depth understanding of the combined heat and mass transfer processes of a counter-flow indirect evaporative cooler operating in semi-arid regions. A series of simulation was conducted to compare the performances between a single-purge and four-purge configurations. Furthermore, the effect of several parameters on the performance of the single-purge configuration was investigated under the baseline condition. The developed model was validated against experimental data from literature to within 2% discrepancy. Key results revealed that the single-purge configuration produced higher cooling capacity (around 20% higher), as well as higher dew-point effectiveness under the same operating conditions. A parametric study was also made on the single-purge configuration. The results revealed that lower product air temperature and higher dew-point effectiveness were achieved with longer channel length and larger purge ratio. However, the maximum cooling capacity approached its maximum with longer channel length and 35% purge ratio.