An experimental study to investigate the effect of air velocities on the performance of an air water harvester machine with two coil evaporators was conducted under the natural conditions of the room. The machine comprised an evaporator, a condenser, a compressor, a capillary tube and a bucket. The air flowed into the machine at velocities of 4m/s, 5m/s and 6m/s. Each evaporator had a dimension of 80mm of the coil diameter, 6.35mm of the pipe diameter and 26 coil numbers. The results show that the highest water mass of 1.457kg is obtained at an air velocity of 5m/s and the highest total heat transfer rate of 240W is obtained at the air velocity of 6m/s.

air water harvester, air velocity, coil evaporation, water mass, heat transfer rate.

Received: April 2, 2024; Accepted: May 3, 2024; Published: June 3, 2024

How to cite this article: Mirmanto Mirmanto, Syahrul Syahrul and Ahsani Insan Sutrisno, Improved performance of an air water harvester with two coil evaporators at various inlet air velocities, JP Journal of Heat and Mass Transfer 37(3) (2024), 389-400. https://doi.org/10.17654/0973576324027

This Open Access Article is Licensed under Creative Commons Attribution 4.0 International License

References:

[1] M. Mirmanto, S. Syahrul and A. T. Wijayanta, Improvement of the performance of an air-water harvester with different evaporator shapes, Case Studies in Chemical and Environmental Engineering 8 (2023), 100157.
[2] M. Mirmanto, M. Wirawan and F. Sunaryo, Performance of air water harvester machine with spiral condensing unit at various intake air velocities, JP Heat and Mass Transfer 36(1) (2023), 59-69.
[3] M. Mirmanto and A. Pangestu, Experimental heat transfer rate on vertical pipes of a simple water harvester, JP Journal of Heat and Mass Transfer 33 (2023), 41-50. http://dx.doi.org/10.17654/0973576323022.
[4] O. M. Harb, M. Sh. Salem, G. H. Abd EL-Hay and Kh. M. Makled, Fog water harvesting providing stability for small Bedwe communities lives on the North coast of Egypt, Ann. Agric. Sci. 61 (2016), 105-110.
https://doi.org/10.1016/j.aoas.2016.01.001.
[5] H. Jarimi, R. Powel and S. Riffat, Review of sustainable methods for atmospheric water harvesting, Int. J. Low Carbon Technol. 15 (2020), 253-276.
https://doi.org/10.1093/ijlct/ctz072.
[6] Y. Tu, R. Wang, Y. Zhang and J. Wang, Progress and expectation of atmospheric water harvesting, Joule 2 (2018), 1452-1475.
https://doi.org/10.1016/j.joule.2018.07.015.
[7] M. Mirmanto, M. Wirawan, A. Mulyanto and I. W. Joniarta, Mesin air-water harvester menggunakan sistem refrigerasi, Pustaka Bangsa, Mataram, Indonesia, 2024.
[8] A. A. Najib, The effect of varying the length of the capillary tube on the water produced by the vapor compression system, Thesis, University of Mataram, Indonesia, 2021.
[9] L. Firdaus, Performance of the air-water harvester machine with a shell-spiral condensing unit at various input air speed, Thesis, University of Mataram, Indonesia, 2022.
[10] A. Faroni, The influence of the diameter of the condensing unit pipe on the mass of water produced from the air-water harvester. The influence of the diameter of the condensing unit pipe on the mass of water produced from the air-water harvester, Thesis, University of Mataram, Indonesia, 2022.
[11] G. Irhami, The effect of entry air velocity on the mass of water produced in a water harvester machine with a fan on the inlet side, Thesis, University of Mataram, Indonesia, 2023.
[12] Z. T. Handaru, Effect of evaporator coil position on forced convection water harvester engine performance, Thesis, University of Mataram, Indonesia, 2023.
[13] Y. A. Cengel, Heat Transfer a Practical Approach, 2nd ed., McGraw Hill, New York, 2002.
[14] F. P. Incropera, D. P. Dewitt, T. L. Bergman and A. S. Lavine, Fundamental of heat and mass transfer, Sixth Edition, John Wiley and Sons, USA, 2006.
[15] http://www.hvac-calculator.net/index.php?v=2.
[16] A. I. Sutrisno, The effect of air speed on the performance of a water harvester machine with two coil evaporators, Thesis, University of Mataram, Indonesia, 2023.
[17] F. R. Khatami, Performance of air-water harvester machines at various intake air RH, Thesis, University of Mataram, 2022.