vol26no4pa2

TJES: Zaidan MH, Abed FM, Farhad AS, .The Effect of Dry and Wet Bulb Temperature Variation on the Performance of the Indirect Evaporative Cooler. Tikrit Journal of Engineering Sciences 2019; vol(4): 8- 15.

APA: Zaidan MH, Abed FM, Farhad AS, . (2019). The Effect of Dry and Wet Bulb Temperature Variation on the Performance of the Indirect Evaporative Cooler. Tikrit Journal of Engineering Sciences, 26 (4), 8- 15.

References

Zhao, X., Duan, Z., Zhan, C. and Riffat, S.B.( 2009). Dynamic performance of a novel dew point air conditioning system for the UK climate. International Journal of Low Carbon Technology. 4(1): 27-35. [2] Han, J. C. (2013). Fundamental gas turbine heat transfer. Journal of thermal science and engineering applications, 5(2), 021007. [3] Ackermann, M. (2013). Cool comfort: America\\\’s romance with air-conditioning. Washington DC, USA: Smithsonian Institution. [4] Xuan, Y. M., Xiao, F., Niu, X. F., Huang, X., & Wang, S. W. (2012). Research and application of evaporative cooling in China: A review (I)–Research. Renewable and Sustainable Energy Reviews, 16(5): 3535- 3546.

Kim, M. H., & Jeong, J. W. (2013). Cooling performance of a 100% outdoor air system integrated with indirect and direct evaporative coolers. Energy, 52(April): 245- 257. [6] Yousif, A. A. (2014). Effect of heat exchanger as a pre cooler on an evaporative cooling system. (M. Sc. Thesis), Sudan University of Science and Technology, Sudan. [7] Zhao, X., Li, J., & Riffat, S. (2008). Numerical study of a novel counter-flow heat and mass exchanger for dew point evaporative cooling. Applied Thermal Engineering, 28(14-15), 1942-1951. [8] [8] Shallcross, D. (2012). Handbook of Psychrometric Charts: Humidity diagrams for engineers. Springer Science & Business Media. [9] Gilani, N., & Poshtiri, A. H. (2017). Thermal design of two-stage evaporative cooler based on thermal comfort criterion. Heat and Mass Transfer, 53(4): 1355-1374. [10] Pescod, D. (1968). Unit air cooler using plastic heat exchanger with evaporatively cooled plates. Australian Refrigeration, Air Conditioning and Heating. 22(9): 22-26. [11] Shah, R. K. and Sekulic, D. P. (2003). Fundamentals of heat exchanger design. New Jersey, USA: John Wiley & Sons, Inc. [12] Internet Source, https://www. Engineering toolbox. com/evaporation-water-surfaced_690. html. الجودي, رالد أحمدت ء1986ئت مبادئ هندسة تكييف [13[ الهواخ والتلليجت العراق: دار الجامعة للطباعة والنهر .والترجمة لجامعة البصرة [14] Porumb, B., Ungureşan, P., Tutunaru, L. F., Şerban, A., & Bălan, M. (2016). A review of indirect evaporative cooling operating conditions and performances. Energy Procedia, 85(Jan.): 452-460. [15] Chen, P. L., Qin, G., Huang, Y. J., & Wu, H. (1989). A heat and mass transfer model for thermal and hydraulic calculations of indirect evaporative cooler performance. [16] Kulkarni, R. K. and Rajput, S.P.S.(2011). Theoretical performance analysis of indirectdirect evaporative cooler in hot and dry climates. International Journal of Engineering Science and Technology. 3(2): 1239-1251.

 

Tikrit Journal of Engineering Sciences (2019) vol(4.) 8.- 15.

The Effect of Dry and Wet Bulb Temperature Variation on the Performance of the Indirect Evaporative Cooler

Maki H..Zaidan *1 Fayadh M..Abed 2 Ali S..Farhad 3

0 Mechanical Engineering Department, Tikrit University, Salahuddin, Iraq

* Corresponding author: makihajzaidan@tu.edu.iq  

DOI: http://dx.doi.org/10.25130/tjes.26.4.02

Abstract

The research is about designing and building up an evaporative cooling system, working by two- stages evaporative cooling system using outer air (pure air). The system is founded by designing and making a heat exchanger of orthogonal flow from Aluminum sheets of (30*60*40) cm, which represents the first stage of the system (indirect stage). The second stage (direct stage) of the system is represented by making an equipment of air washing (cylindrical) with (45 height, 60 width, 3 thickness) cm. The cooling system pulls outer air by a Centrifugal fan. The air passes through the heat exchanger pipes to be cooled tangibly (without moistening). Then it goes over the equipment of air washing to be cooled and cools the specified space. Computer software was designed by FORTRAN Language (FORTRAN 90) to predict the evaporative air cooler performance to know the proper environmental and design conditions of the system. Some variables were made to study their effect on the thermal performance of the system. The studied variable is to change the volumetric flow rate of air from (750 cfm) to (2000 cfm) of the dry side, and from (750 cfm) to (2500 cfm) of the wet side. The pipe length was changed from (20 cm) to (45 cm), and its diameter from (0.5 cm) to (3 cm). Those were the design changes. On the environmental changes, we studied the effect of changing the temperature on the dry or wet bulb of the system. The study is taken place in Tikrit University (34. 35N; 43.37 E), to determine the suitability of the weather conditions of the region for the work of the system. It was taken place in the late August for two consecutive days, with readings of 24 hours. The results show that the best quantity of the air supplied, which represent the best performance of the system (750 cfm) and (1000 cfm) for the wet side when the diameter (1-1.5 cm) and length is (45 cm). The results show also the possibility of the work of this system for the region mentioned because it is characterized by its hot and dry climate in the summer, as the efficiency of evaporative evaporator increases the hot and dry environment by 80%.

Download Full-Text PDF

Keywords: Cooling System Dry bulb Temperature Evaporative Cooler Indirect Evaporative Wet Pad

Related Articles

 

Loader Loading...
EAD Logo Taking too long?
Reload Reload document
| Open Open in new tab

Download [1.21 MB]