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http://dx.doi.org/10.17664/ksgee.2015.11.3.013

Study on Thermal Performance of the Electric Boiler according to Screw Rotation Speed in Heating Tank  

Kum, Jong-Soo (Department of Refrigeration & Air-conditioning Engineering, Pukyong National University)
Kim, Dong-Gyu (Specialized Graduate School Science & Technology Convergence, Pukyong National University)
Park, Jong-Il (Department of Building Systems Engineering, Dong-Eui University)
Publication Information
Journal of the Korean Society for Geothermal and Hydrothermal Energy / v.11, no.3, 2015 , pp. 13-19 More about this Journal
Abstract
This study was aimed at the heating tank with a screw-rotation device for improving the thermal efficiency of electric boiler. In the proposed system, analysis items were the heater rod surface temperature variation, reaching time for set temperature and thermal efficiency. The following conclusions are obtained from this experimental study. (1) When screw speed increases, the time reaching for set temperature tended to be shorter. (2) When the rotation speed becomes 300 rpm, the surface temperature difference between the right and left heater rod decreases by 49%, from $19.7^{\circ}C$ to $9.7^{\circ}C$ in average. (3) When the rotation speed is over 250 rpm, proposed heating tank structure appeared to be effective in terms of thermal efficiency. Thermal efficiency with the rotation speed 300 rpm is improved by 3.8% compared to the case of rotation speed 0 rpm.
Keywords
Electric boiler; Heater rod; Heating tank; Screw; rpm; Thermal Efficiency;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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