Optimization of Air Distribution in A Non-Ducted Concealed Type Fancoil Unit Heat Exchanger

Öz

In this study, increasing efficiency of a heat exchanger as a sub part of concealed ceiling type fan coil unit is aimed. Accordingly, by determining rotational speed of fans based on actual design; generated air distribution in dry condition on heat exchanger is investigated via computational fluid dynamics software. Significant low air distribution is detected in lower and higher sides of the heat exchanger. In order to create solution to this issue and to increase efficiency, by designed air distributor, homogenized air distribution is targeted. As a conclusion, differentiation of air velocities and air distribution is investigated based on various angles. By means of the distributor with an optimum design angle, air distribution is improved and more homogenous air distribution is achieved.

Anahtar Kelimeler

• Fancoil,Air distribution,Computational fluid dynamics

Kaynakça

1. [1] N. Kim, D. Kim, Y. Choi, H. Byun, J. Hwang, "Effect of Inclination Angle on the Air-side Performance of Aluminum Parallel Flow Heat Exchangers Under Wet Conditions", International Refrigeration and Air Conditioning Conference, 2008.
2. [2] P. Karthik, V. Kumaresan, R. Velraj, "Experimental and Parametric Studies of A Louvred Fin and Flat Tube Compact Heat Exchanger Using Computational Fluid Dynamics", Alexandria Engineering Journal, vol. 54, no. 4, pp. 905–915, 2015, https://doi.org/10.1016/j.aej.2015.08.003
3. [3] A. Vaisi, M. Esmaeilpour, H. Taherian, "Experimental Investigation of Geometry Effects on the Performance of A Compact Louvred Heat Exchanger", Applied Thermal Engineering, vol. 31, no. 16, pp. 3337–3346, 2011, https://doi.org/10.1016/j.applthermaleng.2011.06.014
4. [4] W. J. Lee, J. H. Jeong, "Heat Transfer Performance Variations of Condensers Due to Non-Uniform Air Velocity Distributions", International Journal of Refrigeration, vol. 69, p. 85–95, 2016,https://doi.org/10.1016/j.ijrefrig.2016.05.009
5. [5] A. Firouzar, "Bir Fan-Coil Ünitesinin Performansının Deneysel ve Sayısal Olarak Analizi", Gazi University, Science Institue, Mechanical Engineering Department, MSc Thesis, 2014.
6. [6] Eurovent RS 6/C/002-2017, "Rating Standard for The Certification of Non-Ducted Fan-coil Ünits", Paris: Eurovent Certita Certification, p. 4–7.