Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
권호 표지

Performance Test of Pressure and Flow Rate in a Hot-Water Heating System with 3-Way Valves for Flow Bypass

바이패스용 3-Way 밸브를 장착한 온수 난방시스템의 압력 및 유량 특성 평가

  • Hur, Jurn (Graduate School of Energy & Environment, Seoul National University of Technology) ;
  • Lee, Suk-Jong (Graduate School of Energy & Environment, Seoul National University of Technology) ;
  • Sung, Jae-Yong (Department of Mechanical Engineering, Seoul National University of Technology) ;
  • Lee, Myeong-Ho (Department of Mechanical Engineering, Seoul National University of Technology) ;
  • Yoon, Jai-Dong (Graduate School, Seoul National University of Technology)
  • 허전 (서울산업대학교 에너지환경대학원) ;
  • 이석종 (서울산업대학교 에너지환경대학원) ;
  • 성재용 (서울산업대학교 기계공학과) ;
  • 이명호 (서울산업대학교 기계공학과) ;
  • 윤재동 (서울산업대학교 산업대학원)
  • Published : 2007.03.10
Download PDF
⟨ Previous Next ⟩

Abstract

A 3-way valve has been applied to a distributor in a hot-water heating system and the performance of the system was evaluated in view of the variations of pressure drop and flow rate. The 3-way valve has been designed to bypass overplus hot-water when a control valve is closed. Note that the flow goes through heating pipeline in normal operation. In the present study, the measured pressure drops in each part of the flow paths show that the contribution to the total pressure drop is in the order of the supply header with control valves, piping system of each room and return header of the distributor, even though the amount of it is different according to the flow paths. As a result of performance test by sequential closing of the control valves, the variations of pressure drop and flow rate in the distributor with 3-way valves is much lower than those with previous 2-way valves, which prevent noises induced by pressure fluctuations.

Keywords

References

  1. Jung, W. H., 2005, Necessity of differential by-pass valve in heating system, Korean Journal of Air-Conditioning and Refrigeration Engineering, Vol. 34, No.8, pp.58-62
  2. Yoon, W. K., 2005, Flow rate balancing method in variable flow system, Korean Journal of Air-Conditioning and Refrigeration Engineering, Vol. 31, No.9, pp.39-45
  3. Kim, K. W. and Lee, G. N., 2005, Configuration and key technology in floor heating-system, Korean Journal of Air-Conditioning and Refrigeration Engineering, Vol. 34, No.8, pp.16-27
  4. Pollet, G., 1993, Balancing heating systems -design and operation -, Korean Journal of Air-Conditioning and Refrigeration Engineering, Vol. 22, No.3, pp.193-206