Volume 20, Issue 8 (August 2020)                   Modares Mechanical Engineering 2020, 20(8): 2113-2120 | Back to browse issues page

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1- Mechanical Engineering Department, Engineering Faculty, University of Bojnord, Bojnord, Iran , amin.jodat@yahoo.com
2- Department of Research and Development, Technology Development Company, University of Bojnord, Bojnord, Iran
Abstract:   (1841 Views)
In this experimental study, the condensed water in the evaporator coil was injected using the nebulizer technology into the condenser inlet air and its effect on the performance coefficient was studied. The testing equipment employed in the present study consisted of an air conditioner tunnel with the dimensions of 200×35×35cm, which had the compression refrigeration cycle of 1-ton refrigeration with R404a refrigerant. A data logger with pressure and temperature sensors installed at various points of the unit accurately recorded the measured data. The results indicated that the use of a nebulizer would reduce the compressor outlet pressure and compressor power consumption and also increase the performance coefficient. By increasing the air temperature to the condenser from 21 to 36°C, the use of a nebulizer reduced compressor outlet pressure by more than 27%, decreased compressor power consumption by more than 8%, and increased the performance coefficient more than 64%. The results demonstrate the nebulizer technology could be used on hot days of the year by recycling wastewater from air conditioning systems, as a practical and low-cost method to increase the efficiency of direct expansion air conditioning systems.
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Article Type: Original Research | Subject: Heat & Mass Transfer
Received: 2019/12/1 | Accepted: 2020/06/2 | Published: 2020/08/15

References
1. Chua KJ, Chou SK, Yang WM. Advances in heat pump systems: A review. Applied Energy. 2010;87(12):3611-3624. [Link] [DOI:10.1016/j.apenergy.2010.06.014]
2. Jiang H, Jiang Y, Wang Y, Ma Z, Yao Y. An experimental study on a modified air conditioner with a domestic hot water supply (ACDHWS). Energy. 2006;31(12):1789-1803. [Link] [DOI:10.1016/j.energy.2005.07.004]
3. Wang Y, You Y, Zhang Z. Experimental investigations on a conventional air-conditioner working as air-water heat pump. Procedia Engineering. 2011;23:493-497. [Link] [DOI:10.1016/j.proeng.2011.11.2536]
4. Chaiwongsa P, Duangthongsuk W. Hot water making potential using of a conventional air-conditioner as an air-water heat pump. Procedia Engineering. 2011;8:165-170. [Link] [DOI:10.1016/j.proeng.2011.03.030]
5. Jia J, Lee WL. Applying storage-enhanced heat recovery room air-conditioner (SEHRAC) for domestic water heating in residential buildings in Hong Kong. Energy and Buildings. 2014;78:132-142. [Link] [DOI:10.1016/j.enbuild.2014.03.020]
6. Jadhav PJ, Sapkal ND, Kale MR, Bhandigare VV. Heat recovery from refrigerator using water heater and hot box. International Journal of Engineering Research and Technology. 2014;3(5):349-358. [Link]
7. Aziz A, Satria AB, Mainil RI. Experimental study of split air conditioner with and without trombone coil condenser as air conditioning water heater. International Journal of Automotive and Mechanical Engineering. 2015;12(1):2229-8649. [Link] [DOI:10.15282/ijame.12.2015.18.0253]
8. Vaisi F, Hajidavallo E. Modeling and simulation of vapor compression efrigeration cycle. Modares Mechanical Engineering. 2012;12(1):85-97. [Persian] [Link]
9. Jaber S, Ezzat AW. Investigation of energy recovery with exhaust air evaporative cooling in ventilation system. Energy and Buildings. 2017;139:439-448. [Link] [DOI:10.1016/j.enbuild.2017.01.019]
10. Ram NK, Soni N. Performance enhancement of vapour compression refrigeration system with utilization of condenser waste heat in water heater. IJSRSET. 2017;3(8):210-214. [Link]
11. Zhang ZY, Zhang CL, Ge MC, Yu Y. A frost-free dedicated outdoor air system with exhaust air heat recovery. Applied Thermal Engineering. 2018;128:1041-1050. [Link] [DOI:10.1016/j.applthermaleng.2017.09.091]
12. Nakkaew S, Chitipalungsri T, Ahn HS, Jerng DW, Asirvatham LG, Dalkılıç AS. Application of the heat pipe to enhance the performance of the vapor compression refrigeration system. Case Studies in Thermal Engineering. 2019;15:100531. [Link] [DOI:10.1016/j.csite.2019.100531]
13. Anand B, Murugavelh S. Performance analysis of a novel augmented desalination and cooling system using modified vapor compression refrigeration integrated with humidification-dehumidification desalination. Journal of Cleaner Production. 2020;255:120224. [Link] [DOI:10.1016/j.jclepro.2020.120224]
14. Wood RW, Loomis AL. The physical and biological effects of high-frequency sound-waves of great intensity. The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science. 1927;4(22):417-436. [Link] [DOI:10.1080/14786440908564348]
15. Giovannini A, Guyomar D, Gschwind M, Fonzes G. Evaluation and design of new piezoelectrical droplets generator. 1994 Proceedings of IEEE Ultrasonics Symposium, 31-3 October-November 1994, Cannes, France. Piscataway: IEEE; 1994. [Link] [DOI:10.1109/ULTSYM.1994.401661]
16. Sabarez H, Gallego-Juarez J, Riera E. Ultrasonic-assisted convective drying of apple slices. Drying Technology. 2012;30(9):989-997. [Link] [DOI:10.1080/07373937.2012.677083]
17. García-Pérez JV, Ozuna C, Ortuño C, Cárcel JA, Mulet A. Modeling ultrasonically assisted convective drying of eggplant. Drying Technology. 2011;29(13):1499-1509. [Link] [DOI:10.1080/07373937.2011.576321]
18. Gamboa-Santos J, Montilla A, Cárcel JA, Villamiel M, Garcia-Perez JV. Air-borne ultrasound application in the convective drying of strawberry. Journal of Food Engineering. 2014;128:132-139. [Link] [DOI:10.1016/j.jfoodeng.2013.12.021]
19. Cárcel J, García-Pérez J, Riera E, Mulet A. Influence of high-intensity ultrasound on drying kinetics of persimmon. Drying Technology. 2007;25(1):185-193. [Link] [DOI:10.1080/07373930601161070]
20. Jodat A, Najafian M, Mohammadi A. Experimental study of injecting water vapor and oil compounds by nebulizer on the efficiency and natural gas flame pollution. Amirkabir Journal of Mechanical Engineering. 2019;52:11. [Persian] [Link]
21. Jónsson BL, Garðarsson GO, Petursson O, Hlynsson SB, Foley JT. Ultrasonic gasoline evaporation transducer-reduction of internal combustion engine fuel consumption using axiomatic design. Procedia CIRP. 2015;34:168-173 [Link] [DOI:10.1016/j.procir.2015.07.061]
22. Yao Y. Using power ultrasound for the regeneration of dehumidizers in desiccant air-conditioning systems: A review of prospective studies and unexplored issues. Renewable and Sustainable Energy Reviews. 2010;14(7):1860-1873. [Link] [DOI:10.1016/j.rser.2010.03.042]

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