Development of Direct Water Purification System
AUTHORS
Doo-Sung Baik,Dept. of Mechanical Engineering, Daejin University, Korea
ABSTRACT
After the mid-1980s, a membrane-based drinking water supply device was first studied in Korea, and recently, a reverse osmosis pressure drinking supply device and UF hollow fiber membrane drinking water supply device are the main types. The cooling method of water purifier is largely divided into two. There is a direct cooling method that cools the water by installing an evaporator inside the water purifier cold water tank, and the indirect cooling method that cools the water inside the reservoir by cooling the entire cold water container by placing the evaporator outside the cold water container. However, since water is always stored in the cold water tank, it is necessary to clean the water bottle due to bacteria growth. In addition, the cooling water tank must operate the cooling system frequently regardless of the use of drinking water to maintain a constant temperature at all times, and unnecessary power required for standby is consumed. On the other hand, the direct water purifier cooling system has a lower continuous discharge rate compared to the storage type. In this study, by improving the existing instantaneous cooling system, the cooling coil is directly in contact with the cold water pipe so that heat is directly transferred by the heat conduction method that occurs between the cooling coil and the cold water pipe, thereby contributing to the energy saving.
KEYWORDS
Water purifier, Cooling system, Refrigerants, Filter, Cooling coil
REFERENCES
[1] Y. S. Jeon, H. H. Park, J. S. Lee, “Analytical study on the performance characteristics of an instant cooling type water purifier with the design parameters of the cooling tank,” Korean J. of Air-conditioning and Refrigeration Engineering, vol.24, no.7, pp.545-552, (2012)
[2] K. J. Park, Y. H. Lee, D. S. Jung, and K. K. Kim, “Performance of G430A on refrigeration system of domestic water purifiers,” Korean J. of Air-conditioning and Refrigeration Engineering, vol.21, no.2, pp.109-117, (2009)
[3] J. W. Jung, C. W. Jung, S. S. Kim, and Y. T. Kang, “Performance comparison between the conventional air cooled type condenser and the water cooled type condenser using drain water of the reverse osmosis type cold and hot water purifier,” Proceedings of SAREK Summer Annual Conference, pp.1165-1170, Sept. 7-10, (2015)
[4] D. W. Lee, and C. B. Kim, “Characteristic analysis of the cooling system using ice slurry type heat storage system,” J. of Energy Engineering, vol.20, no.1, pp.30-35, (2011)
[5] F. P. Incropera and D. P. Dewitt, “Heat and mass transfer,” John Wiley Publishers, (2017)
[6] K. B. Kim, “A design compact size direct feed water purifier through the redesign of cooling module part,” Thesis, Pusan National University, Korea, (2015)
[7] J. H. Lee, “A study on factors of agitator of cooling module in direct water stream type of water purifier that influence continuous cooled water outlet temperature,” Thesis, Pusan National University, Korea, (2014)
[8] J. S. Kim, “Experimental study on cooling performance of instant cooling unit for drinking water,” Thesis, Seoul National University of Science and Technology, (2017)
[9] Yunus A. Cengel and Michael A. Boles, “Thermodynamics,” McGraw Hill, (2016)
[10] D. H. Kim and S. H. Lee, “Evolution of water purifier technology due to social environment changes,” Journal of Korean Society for Environment Technology, vol.2, no.5, pp.240-248, (2020)
[11] K. H. Ko and Y. W. Hwang, “Life cycle water footprint analysis of an water purifier product,” Korea Society for life cycle assessment, vol.19, no.1, pp.41-43, (2018)