DOI QR코드

DOI QR Code

Analysis of Efficiency of Solar Hot Water System based on Energy Demand

에너지 수요처의 사용특성에 따른 태양열 급탕시스템의 효율분석

  • Jun, Yong-Joon (Department of Architectural Engineering, Dong-Eui University) ;
  • Park, Kyung-Soon (Architectural Engineering Major, Division of Urban, Architecture and Civil Engineering, Dong-Eui University)
  • 전용준 (동의대학교 건축공학과 대학원) ;
  • 박경순 (동의대학교 건설공학부 건축공학전공)
  • Received : 2017.09.12
  • Accepted : 2017.10.24
  • Published : 2017.10.30

Abstract

In a hot water system using solar energy, solar heat is not simply collected by the heat collecting plate, but by heat exchange between the solar collector (flat or vacuum type) and the hot water storage tank. Therefore, the amount of collected solar energy depends on the hot water usage patterns that determine the temperature of the thermal storage tank. Also, if the temperature of the hot water stored in the storage tank exceeds the dangerous temperature during the summer, the heat must be released for safety. If the temperature of the hot water in the storage tank is low, it is necessary to heat by the auxiliary heat source. In this study, three buildings are defined as hotel, swimming pool, and school facilities. And we calculated the released heat energy, auxiliary heat source, and pure storage heat energy based on different hot water usage patterns and installation angle of the solar collectors.

Keywords

References

  1. Bai, S. E., Bai, C. H., Nam, H. K., and Shin, K. Y., A Study on Reducing Temperature Rise of Twin-glass Evacuated Tube Solar Collector During Summer Time, Journal of the Korean Solar Energy Society Vol. 33, No. 3, pp. 36-41, 2013. https://doi.org/10.7836/kses.2013.33.3.036
  2. Jo, D. K., Yun, C. Y., Kim, K. D., and Kang, Y.H., A Study on the Estimating Solar Radiation Using Hours of Bright Sunshine for the Installation of Photovoltaic System in Korea, Journal of the Korean Solar Energy Society, Vol. 31, No. 4, pp. 72-79, 2011. https://doi.org/10.7836/kses.2011.31.4.072
  3. Khorasanizadeh, H., Mohammadi, K., and Mostafaeipour, A., Establishing a Diffuse Solar Radiation Model for Determining the Optimum Tilt Angle of Solar Surfaces in Tabass, Iran. Energy Conversion and Management, Vol. 78, pp. 805-814, 2014. https://doi.org/10.1016/j.enconman.2013.11.048
  4. Loutzenhiser, P. G., Manz, H., Felsmann, C., Strachan, P. A., Frank, T. H., and Maxwell, G. M., Empirical Validation of Models to Compute Solar Irradiance on Inclined Surfaces for Building Energy Simulation, Solar Energy, Vol. 81, No. 2, pp. 254-267, 2007. https://doi.org/10.1016/j.solener.2006.03.009
  5. Zhang, Q., Joe, H., Lang, S., Development of Typical Year Weather Data for Chinese Locations/Discussion. ASHRAE transactions, 108: 1063, 2002.
  6. Kim, H. Y. and Kim, J., Correlation to Predict Global Solar Insolation and Evaluation of that Correlation for Korea (I), New & Renewable Energy, Vol. 10, No. 12, pp. 30-35, 2016.
  7. Yoon, K., Yun, G., Jeon, J., and Kim, K.S., Evaluation of Hourly Solar Radiation on Inclined Surfaces at Seoul by Photographical Method, Solar Energy, Vol. 100, 203-216, 2014. https://doi.org/10.1016/j.solener.2013.11.011
  8. Lee, K. H. and Baek, N. C., A Modified Efficiency Equation of Solar Collectors, Energy Procedia, Vol. 48, pp. 145-149, 2014. https://doi.org/10.1016/j.egypro.2014.02.018
  9. Jun, Y. J., Song, Y. H., and Park, K. S., A Study on the Prediction of the Optimum Performance of a Small-scale Desalination System Using Solar Heat Energy, Energies, Vol. 10, No. 9, 1274, 2017. https://doi.org/10.3390/en10091274
  10. The Society of Air-conditioning and Refrigerating Engineers of Korea. Society of Air-Conditioning and Refrigerating Engineers of Korea; SAREK: Seoul, Korea, 2011; ISBM 978-89-98049-01-0.