Journal of the Korean Society for Geothermal and Hydrothermal Energy (한국지열·수열에너지학회논문집)

Korean Society for Geothermal and Hydrothermal Energy (한국지열·수열에너지학회)
권호 표지
DOI QR코드

DOI QR Code

The Effects of Hot Water Supply Temperature on Indoor Thermal Characteristics for Floor Radiant Heating System

바닥복사 난방시스템의 공급온수온도가 실내 열환경에 미치는 영향

  • 안병천 (가천대학교 기계공학과)
  • Received : 2018.09.20
  • Accepted : 2018.11.22
  • Published : 2018.12.01
Download PDF
⟨ Previous Next ⟩

Abstract

The Effects of hot water supply temperature on indoor thermal characteristics for floor radiant heating system in residential apartment were researched by computer simulation. The parametric study on hot water supply temperatures with different outdoor air temperatures was done with regard to energy performance and control characteristics, respectively. As a result, the maximum overshoot of indoor air temperature and energy consumption were reduced by adjusting the hot water supply temperatures with outdoor air temperatures.

Keywords

JOOJBH_2018_v14n4_13_f0001.png 이미지

Fig. 1. A Schematic diagram for heat transfer analysis in room.

JOOJBH_2018_v14n4_13_f0002.png 이미지

Fig. 2. A equivalent R-C circuit for unsteady energy analysis.

JOOJBH_2018_v14n4_13_f0003.png 이미지

Fig. 3. Floor pipe networks in household.

JOOJBH_2018_v14n4_13_f0004.png 이미지

Fig. 4. Application of lead time for indoor air temperature change.

JOOJBH_2018_v14n4_13_f0005.png 이미지

Fig. 5. Indoor air temperature responses with supply water temperatures.

JOOJBH_2018_v14n4_13_f0006.png 이미지

Fig. 6. Energy consumptions with supply water temperature.

JOOJBH_2018_v14n4_13_f0007.png 이미지

Fig. 7. Indoor air temperature responses with supply water and outdoor air temperatures.

JOOJBH_2018_v14n4_13_f0008.png 이미지

Fig. 8. Indoor air temperature responses with supply water and outdoor air temperatures.

JOOJBH_2018_v14n4_13_f0009.png 이미지

Fig. 9. Indoor air temperature responses of supply water and outdoor air temperature.

JOOJBH_2018_v14n4_13_f0010.png 이미지

Fig. 10. Indoor air temperature responses with calibration of supply lead time.

JOOJBH_2018_v14n4_13_f0011.png 이미지

Fig. 11. The comparison of energy consumptions with calibration of supply lead time for supply water temper-ature.

Table 1. Simulation model data for Room 2

JOOJBH_2018_v14n4_13_t0001.png 이미지

Table 2. Operation conditions of simulation

JOOJBH_2018_v14n4_13_t0002.png 이미지

Table 3. Operation conditions of simulation

JOOJBH_2018_v14n4_13_t0003.png 이미지

References

  1. Song, J. Y. and Ahn, B. C., 2016, Simulation study for control strategies of indoor air temperature in floor radiant heating system, Korea Society of Geothermal Energy Engineers, Vol. 12, No. 4, pp. 21-26. https://doi.org/10.17664/ksgee.2016.12.4.021
  2. Yeo, M. S., Kim, K. W., Rhie, M. K., and Wu, F. J., 2004, A study on the individual room control of radiant floor heating system in apartment buildings, Journal of Air-Conditioning and Refrigeration Engineering, Vol. 16, No. 5, pp. 421-429.
  3. Song, J. Y. and Ahn, B. C., 2012, A study on GRNN control strategies for floor radiant heating system in residential apartments, Journal of Air-Conditioning and Refrigeration Engineering, Vol. 24, No. 12, pp. 830-836. https://doi.org/10.6110/KJACR.2012.24.12.830
  4. Ahn, B. C. and Song, J. Y., 2013, A study on the operational strategies for outdoor air temperature change characteristics in a radiant floor heating system, Journal of Air-Conditioning and Refrigeration Engineering, Vol. 25, No. 12, pp. 685-692. https://doi.org/10.6110/KJACR.2013.25.12.685
  5. Ahn, B. C. and Song, J. Y., 2010, Control characteristics and heating performance analysis of automatic thermostatic valves for floor radiant heating system in residential apartment, Energy 35, pp. 1615-1624. https://doi.org/10.1016/j.energy.2009.11.007