• The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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• v.20 no.1
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• pp.39-45
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• 1991

건축물(建築物)의 설비(設備)를 관리(管理)하는 과정에서 향후(向後) 심각히 검토될 관심사로는 소음(騷音)과 진동(振動)을 들 수 있다. 배관계통(配管系統)에서 발생하는 워터햄머는 소음(騷音)과 진동(振動)의 주된 원인이 되고 있으므로 본(本) 고(稿)에서는 특히 주택부문(住宅部門)에서의 워터햄머에 대한 발생원인(發生原因)과 대책(對策)을 제시(提示)하였다.

• 월간 기계설비
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• s.24
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• pp.76-79
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• 1992

• 월간 기계설비
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• s.16
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• pp.166-168
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• 1991

• The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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• v.25 no.5
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• pp.387-393
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• 1996

• The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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• v.26 no.5
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• pp.345-353
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• 1997

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.12 no.12
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• pp.1066-1072
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• 2000

This study is to investigate the pressure wave characteristics and the absorption of maximum and minimum pressure generated by instantaneous valve closure at the end of the straightening copper piping system with and without a water hammer arrester. Experiments were conducted under the following conditions : initial pressure 1~5 bar, flow velocity 0.6~3.0 m/s, water temperature $20^{\circ}C$ and air volume of water hammer arrester $80~180^cm^3$. Experimental results show that the optimum air volume of water hammer arrester is 110㎤.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.14 no.4
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• pp.269-277
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• 2002

Dynamic characteristics of water hammer arresters installed in a building water supply system have been investigated numerically by utilizing a commercial rode that employs the method of characteristics. Some preliminary results with those arresters produced in this study agree well with the previously reported. Then, the arresters have been incorporated into a water supply pipe system of a $59m^2$ apartment unit constructed by a leading construction company, and their dynamic characteristics, especially on the reduction in the water hammer pressure, are investigated. It is found that the setting of the arresters in the pipe system, which is recommended by the company, may not be proper for reducing the pressure to less than 1082.0 kPa when buick-closure valves in the pipe system are closed within 30 ms at the static pressure of 542.6 kPa. More arresters in the system may be required to meet a pressure criteria.

• Water for future
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• v.12 no.2
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• pp.49-55
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• 1979

The purpose of this study is to develope the computer program to compute the unsteady, transient flow conditions in a hydraulic system. The unstready flow condition may be brought about due to power failure to pump motors, pump start-up or modulation of control valve. The program was written specially for analyzing the water-hammer in the pumping system. The pumping system which can be simulated by the program can contain pipelines, tunnel, surge tanks, branched lines, reservoirs, dead end pipes and valve controls. The use of a computer program to analyze haydranlic transients is of great benifit to the designers of transmission main and distribution systems. Advantages include time savings, the ability to analyze complex piping systems, and increased accuracy. The author outlines a pogram developed for the above system.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.12 no.7
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• pp.697-702
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• 2000

This study is to investigate the pressure wave characteristics and the maximum pressure rise generated by instantaneous valve closure at the end of the straightening copper piping system. Experiments were conducted under the following conditions : initial pressure 1~5 bar, flow velocity 0.6~3.0 m/s and water temperature $20^{\circ}C$ . Results indicated that the peak pressure generated by quick valve closure reached Joukowsky's value. And we also found that the maximum pressure rise and the pressure history were depended on not only closing time but also flow velocity.

• Proceedings of the SAREK Conference
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• 2005.11a
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• pp.511-516
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• 2005

This study is to investigate the pressure wave characteristics and the maximum pressure rise generated by instantaneous valve closure at the end of the straightening polybutylene double piping system with header. Experiments were conducted under the following conditions: initial pressure $1{\sim}5$ bar, flow velocity $0.5{\sim}3.0$ m/s and water temperature $25^{\circ}C$.