2 edition of Diagnosis of condensation-induced waterhammer found in the catalog.
Diagnosis of condensation-induced waterhammer
M. G. Izenson
by Division of Systems Research, Office of Nuclear Regulatory Research, U.S. Nuclear Regulatory Commission in Washington, DC
|Other titles||Diagnosis of condensation induced waterhammer.|
|Statement||prepared by M.G. Izenson, P.H. Rothe, G.B. Wallis.|
|Series||Creare TM -- 1189.|
|Contributions||Rothe, Paul H., Wallis, Graham B., 1936-, U.S. Nuclear Regulatory Commission. Office of Nuclear Regulatory Research. Division of Systems Research., Creare, inc.|
|The Physical Object|
|Pagination||2 v. (various pagings) :|
Water Hammer caused by the sudden condensation of steam. When steam loses its heat, it turns into condensate, whose specific volume is more than times smaller than that of steam. So when steam comes into contact with colder condensate and condenses, its volume is . Do you have any experiences regarding numerical simulation of condensation induced water hammer (CIWH) in steam pipelines using the Fluent code? I have googled this but didn't found any results regarding numerical simulation of CIWH using Fluent, CFX .
Banging pipes & water hammer noise diagnosis, cure: Water hammer noises in plumbing is also called hydrostatic shock. Our page top photo shows a water hammer noise suppression device produced by Oatey and available at building suppliers. Careful experiments have been conducted for the purpose of investigating the phenomenon of condensation-induced waterhammer in an ammonia refrigeration system. To initiate a waterhammer event warm ammonia gas was introduced over static subcooled ammonia liquid placed in a horizontal mm diameter carbon steel pipe m in length.
condensation-induced waterhammer when certain criteria have been met. The licensee reasoned that since the VCSNS situation satisfied the EPRI criteria in this regard, the impact of the worst-case column-closure waterhammer is considered bounding and further analyses of condensation-induced waterhammer scenarios should not be necessary. 47 works Search for books with subject Water hammer. Search. Pressurized water-reactor feedwater piping response to water hammer Read. El golpe de ariete en impulsiones Enrique Mendiluce Rosich Not In Library. Read. Diagnosis of condensation-induced waterhammer M. G. Izenson Not In Library. Two-phase flow and waterhammer loads in vessels.
Condensation-induced waterhammer is the most damaging form of waterhammer, and its diagnosis is complicated by the complex nature of the underlying phenomena. In Volume 1, the guidebook groups condensation-induced waterhammers into five event classes which have similar phenomena and. Get this from a library.
Diagnosis of condensation-induced waterhammer. [M G Izenson; Paul H Rothe; Graham B Wallis; U.S. Nuclear Regulatory Commission. Office of Nuclear Regulatory Research. Division of Systems Research.; Creare, inc.]. The occurrence of condensation-induced waterhammer depended upon three major variables; namely, (1) initial liquid depth, (2) liquid temperature, and (3) mass flow rate of warm gas.
With regard to waterhammer, addressees may find Volumes 1 and 2 of NUREG/CR-"Diagnosis of Condensation-Induced Waterhammer," dated Octoberinformative and useful in evaluating potential waterhammer conditions. Many times the system design and operation can lead to unknown or unexpected conditions occurring that may allow a waterhammer to occur.
A recent event at a nuclear power plant is analyzed and the cause of failure and the root cause have been determined. The cause of the failure was a condensation induced waterhammer. The waterhammer concerns discussed in GL are primarily associated with low pressure systems.
While the analytical methodology contained in NUREG/CR, "Diagnosis of Condensation-Induced Waterhammer" 12J is considered by NRC to be acceptable for analyzing. Introduction Condensation-induced waterhammer (CIWH) is the most damaging form of waterharnmer and its diagnosis is extremely difficult because of the complex nature of the underlying phenomena that occur at the steam-water interface.
The condensation induced water hammer (CIWH) phenomenon may cause serious damage to the pipes and related system, which often occurs during the. The conclusion of the incident investigation was that the pump was destroyed by a condensation induced water hammer (CIWH) generated in the condensate return line; in this phenomenon, a volume of hot steam can get trapped by subcooled liquid, generating high-pressure shock waves when it rapidly collapses due to condensation.
Condensate-induced water hammer is an extremely dangerous phenomenon and operators should be trained to ensure they fully understand. Water hammer occurs when water in a pipe is brought to a stop or a change in direction that sends a shockwave through the system and produces a knocking or hammering noise.
Abstract Experiments were conducted for the purpose of investigating the phenomenon of condensation-induced waterhammer in an ammonia refrigeration system.
Waterhammer was initiated by introducing hot ammonia gas over static subcooled ammonia liquid placed in a horizontal mm diameter carbon steel pipe approximately m long. By means of fast response piezoelectric. Condensation-induced waterhammer is the most damaging form of waterhammer, and its diagnosis is complicated by the complex nature of the underlying phenomena.
In Volume 1, the guidebook groups. The occurrence of condensation-induced waterhammer depended upon three major variables; namely, (1) initial liquid depth, (2) liquid temperature, and (3) mass flow rate of hot gas.
Waterhammer accidents in district steam systems which kill operators are, in my experience, always due to Condensation-Induced Waterhammer. The other classifications of waterhammer that can occur in steam systems: Column-Closure, Sudden Choking at an Orifice due to flashing hot water, sudden valve closure, and steam-blown slug flow (which is not, technically, waterhammer) don’t generally.
Condensation induced waterhammer occurrence and prevention. Full Record; Other Related Research; Abstract. Waterhammer in piping systems can occur for a variety of operating, design, and maintenance reasons. Many times the system design and operation can lead to unknown or unexpected conditions to exist in a plant, such as unexpected.
Condensation Induced Waterhammer is a different animal. The pressure pulse generated by a Condensation Induced Waterhammer is due to the compression of water by a piston formed by a moving plug of water.
This is the same phenomena which generates waterhammer in a hydronic single phase system (i.e. plumbing). condensation induced water hammer risks and issues associated with sagd operations jeff dancey, p. eng. baker engineering and risk consultants, inc. outline • condensation induced water hammer (ciwh) - explanation • steam assisted gravity drainage (sagd) operations – overview.
The condensation induced water hammer (CIWH) phenomenon may cause serious damage to the pipes and related system, which often occurs during the steam-water direct contact condensation process. In this paper, an experimental investigation was performed to study CIWH phenomenon caused by steam-water direct contact condensation in a horizontal pipe.
Improved analytical models have been proposed that can predict the lower and upper limits of the waterhammer region for given flow conditions by incorporation of recent advances made in the understanding of phenomena associated with the condensation-induced waterhammer into.
Journal Article: Condensation-induced waterhammer in a vertical upfill pipe Title: Condensation-induced waterhammer in a vertical upfill pipe Full Record. Singh et al. () carried out a study to analyse the condensation induced water hammer phenomena caused by steam-water interaction in an Integrated Test Loop (ITL) facility and captured the shock pulses, pressure, temperature, flow rate and fluid levels in the loop after the onset of water hammer.
Safe practice of operating the loop without.Water hammer may be defined as an extreme fluid transient, occasionally recognized by loud banging, or hammering sounds, sometimes associated with fluid transients, which are caused by flow rate changes and resultant pressure surges, where the terms fluid transient and water hammer .A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text.