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전기히터의 설계 변수에 따른 순간온수기 열유동 특성 해석

Analysis of heat and fluid flows in an instant water heater according to design parameters of an electric heat device

  • Hui Sun (SeoulTech, Graduate School) ;
  • Joon Hyun Kim (SeoulTech, NDT Research Center) ;
  • Jaeyong Sung (SeoulTech, Dept. of Mechanical and Automotive Engineering)
  • 투고 : 2023.10.06
  • 심사 : 2023.11.01
  • 발행 : 2023.11.30

초록

This study aims to explore the heat transfer and flow phenomena inside an instant water heater and the influence of the design parameters of the water heater on the heating performance was investigated by 3-D numerical simulations considering heat convection. The design parameters are the heating ceramic dimension, the power of the heating device, and the water flow rate. The results show that a reasonable space for the heating device is required to optimize the heating performance. It is desirable to design higher heating device as possible for a given electric power. There exists a critical water flow rate that best meets the heating performance. The change in electric power has no impact on the flow phenomena and heating performance.

키워드

참고문헌

  1. Ibrahim, O., Fardoun, F., Younes, R. and Louahlia-Gualous, H., 2014, "Review of water-heating systems: General selection approach based on energy and environmental aspects," Building and Environment, Vol.72, pp. 259-286. https://doi.org/10.1016/j.buildenv.2013.09.006
  2. Li, G. and Du, Y., 2018, "Performance investigation and economic benefits of new control strategies for heat pump-gas fired water heater hybrid system," Applied Energy, Vol.232, pp. 101-118. https://doi.org/10.1016/j.apenergy.2018.09.065
  3. Perez-Lombard, L., Ortiz, J., Pout, C., 2008, "A review on buildings energy consumption information," Energy and Buildings, Vol.40(3), pp. 394-398. https://doi.org/10.1016/j.enbuild.2007.03.007
  4. Fan, J. F., Ding, W. K., Zhang, J. F., He, Y. L. and Tao, W. Q., 2009, "A performance evaluation plot of enhanced heat transfer techniques oriented for energy-saving," International Journal of Heat and Mass Transfer, Vol.52(1-2), pp. 33-44. https://doi.org/10.1016/j.ijheatmasstransfer.2008.07.006
  5. Duff, C. A. and Bradnum, C., 2013, "Design of a domestic water heating system to save water and electricity," Proceedings of the 21st Domestic Use of Energy Conference, pp. 1-6.
  6. Sedeh, M. M. and Khodadadi, J. M., 2013, "Energy efficiency improvement and fuel savings in water heaters using baffles," Applied energy, Vol.102, pp. 520-533. https://doi.org/10.1016/j.apenergy.2012.08.034
  7. Ahn, S. S. and Kim, W. H., 2016, "Design and verification of ceramic heating element-based tankless instant electric water heater," Journal of the Institute of Electronics and Information Engineers, Vol.53(11), pp. 151-159. https://doi.org/10.5573/ieie.2016.53.11.151
  8. Nicoara, M., Raduta, A., Cucuruz, L. R. and Locovei, C.,2010, "Numerical simulation of fluid flow and heat transfer in a water heater," Proceedings of the 3rd WSEAS International Conference on Finite Differences-Finite Elements-Finite Volumes-Boundary Elements, pp. 98-105.
  9. Liu, Z., Xu, K., Qi, L., Pan, H., Zhang, Z., Pan, Y. and Zeng, Y., 2019, "A high efficiency electric heater based on dual-helical tube and screw-tape for instant water heating," Applied Thermal Engineering, Vol.160, 114018.
  10. Sezai, I., Aldabbagh, L. B. Y., Atikol, U. and Hacisevki, H., 2005, "Performance improvement by using dual heaters in a storage-type domestic electric water-heater," Applied Energy, Vol.81(3), pp. 291-305 https://doi.org/10.1016/j.apenergy.2004.07.011
  11. Hegazy, A. A. and Diab, M. R., 2002, "Performance of an improved design for storage-type domestic electrical water-heaters," Applied Energy, Vol.71(4), pp. 287-306. https://doi.org/10.1016/S0306-2619(02)00006-5