scholarly journals Developments towards 1MW Gyrotron Test Facility at ITER-India

2019 ◽  
Vol 203 ◽  
pp. 04013 ◽  
Author(s):  
Vipal Rathod ◽  
E. Sharan Dilip ◽  
Ronak Shah ◽  
Deepak Mandge ◽  
Amit Yadav ◽  
...  
Keyword(s):  
High Power ◽  
Distribution System ◽  
System Integration ◽  
System Performance ◽  
Water Distribution ◽  
Cooling Water ◽  
Current Drive ◽  
Integrated System ◽  
Test Facility ◽  
Industrial Grade

ITER-India, the Indian domestic agency for the ITER project, has the responsibility to supply a set of two high power Gyrotron sources (1 MW, 170 GHz, 3600 s) along with the auxiliary systems for Electron Cyclotron Heating & Current Drive applications. For such high power Gyrotron systems, one of the challenging areas is the system integration and establishment of reliable integrated system performance. ITER-India plans to establish the integrated Gyrotron system performance that essentially meets the ITER requirements in a Gyrotron Test Facility which is specifically being developed at ITER-India. This paper discusses about the recent updates towards the Test Facility development which includes, development of cost effective & modular Body Power Supply (BPS), Industrial grade prototype interlock & protection modules, a Gyrotron field simulator and cooling water distribution system.

Water Distribution System Modeling and Simulation

2011 ◽  
Vol 213 ◽  
pp. 196-200 ◽  
Author(s):  
Shi Hu Shu ◽  
Dong Zhang
Keyword(s):  
Emergency Response ◽  
Financial Planning ◽  
Distribution System ◽  
Water Distribution ◽  
Water Distribution System ◽  
System Modeling ◽  
Integrated System ◽  
Chemical Contaminants ◽  
Decision Making Processes ◽  
Asset Inventory

This paper describes a project to integrate EPANET, Giris and SCADA to assist water engineers in assessing the water distribution system in city S. The integrated system simulates the flow and concentration of chemical contaminants in municipality's water distribution system. The integrated model is a powerful tool for routine planning and emergency response. The capabilities of the model can greatly assist in the decision making processes for network asset inventory, rehabilitation requirements, and financial planning. The system was tested using the S City database composed of approximately 13219 junctions and 14832 pipes whose diameter not less than 300 mm.

scholarly journals Evaluation of Hydraulic Performance of Water Distribution System for Sustainable Management

2021 ◽  
Author(s):  
Tarekegn Kuma ◽  
Brook Abate Getahun
Keyword(s):  
Distribution System ◽  
Field Data ◽  
Water Distribution ◽  
Water Distribution System ◽  
Simulated Data ◽  
Water Distribution Network ◽  
Hydraulic Performance ◽  
Hydraulic Model ◽  
Integrated System

Abstract Understanding water distribution system hydraulic performance is crucial for a water supply system management. A case study was conducted evaluating the hydraulic performance of water distribution system of Tulu Bolo town. The hydraulic model of water distribution network was developed using GIS integrated with WaterGEMS hydraulic model. The implementation of the integrated system verified that water to regulate the pressure and velocity in order to sustain. According to the analysis, about 92.6% of nodes have optimized pressure ranged between 15m to 70m and about 1.27% is under permissible pressure. Model calibration was performed by comparing simulated data with field data, the result of pressure calibration has a linear correlation coefficient of 0.93 and the hydraulic model in WaterGEMS was calibrated and optimized with a field data.

scholarly journals Robustness and Water Distribution System: State-of-the-Art Review

Water ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 974 ◽  
Author(s):  
Donghwi Jung ◽  
Seungyub Lee ◽  
Joong Hoon Kim
Keyword(s):  
Distribution System ◽  
System Performance ◽  
Water Distribution ◽  
Water Distribution System ◽  
State Of The Art ◽  
Point Of View ◽  
New Paradigm ◽  
Performance Variation ◽  
Failure Event ◽  
Operation And Management

The resilience of a water distribution system (WDS) is defined as its ability to prepare, respond to, and recover from a catastrophic failure event such as an earthquake or intentional contamination. Robustness (ROB), one of the components of resilience, is the ability to maintain functionality to meet customer demands. Recently, the traditional probability-based system performance perspective has begun to shift toward the ROB and system performance variation point of view. This paper provides a state-of-the-art review of WDS ROB-based approaches proposed in three research categories: Design, operation, and management. While few pioneering works have been published in the latter two areas, an ROB indicator was proposed and thoroughly investigated for WDS design. Then, some future works are recommended in each of the three domains to promote developments in WDS ROB. Finally, a brief summary of this paper is presented, from which the final conclusions of the state-of-the-art review and recommendations are drawn. The new paradigm of WDS ROB-based design, operation, and management is in its infant stage and should be carved out in future studies.

scholarly journals Rapid Testing and Interventions to Control Legionella Proliferation following a Legionnaires’ Disease Outbreak Associated with Cooling Towers

2021 ◽  
Vol 9 (3) ◽  
pp. 615
Author(s):  
Charlotte Young ◽  
Duncan Smith ◽  
Tim Wafer ◽  
Brian Crook
Keyword(s):  
Distribution System ◽  
Water Distribution ◽  
Cooling Tower ◽  
Quantitative Polymerase Chain Reaction ◽  
Cooling Water ◽  
Analytical Techniques ◽  
Remedial Action ◽  
Sampling Locations ◽  
Routine Monitoring ◽  
History Of

Most literature to date on the use of rapid Legionella tests have compared different sampling and analytical techniques, with few studies on real-world experiences using such methods. Rapid tests offer a significantly shorter feedback loop on the effectiveness of the controls. This study involved a complex of five factories, three of which had a history of Legionella contamination in their cooling water distribution system. Multiple sampling locations were utilised to take monthly water samples over 39 months to analyse for Legionella by both culture and quantitative polymerase chain reaction (qPCR). Routine monitoring gave no positive Legionella results by culture (n = 330); however, samples were frequently (68%) positive by qPCR for Legionella spp. (n = 1564). Legionella spp. qPCR assay was thus found to be a good indicator of cooling tower system health and suitable as a routine monitoring tool. An in-house qPCR limit of 5000 genomic units (GU)/L Legionella spp. was established to trigger investigation and remedial action. This approach facilitated swift remedial action to prevent Legionella proliferation to levels that may represent a public health risk. Cooling tower operators may have to set their own action levels for their own systems; however, in this study, 5000 GU/L was deemed appropriate and pragmatic.

Water Distribution System Modeling and Smart Grid Technology

2011 ◽  
Vol 243-249 ◽  
pp. 4846-4849 ◽  
Author(s):  
Shi Hu Shu
Keyword(s):  
Smart Grid ◽  
Distribution System ◽  
Water Distribution ◽  
Water Distribution System ◽  
System Modeling ◽  
Integrated System ◽  
Chemical Contaminants ◽  
Pipe Burst ◽  
Decision Making Processes ◽  
Asset Inventory

In order to study how information and technology can be used to improve water management, smart grid technologies were introduced into the water industry. This paper describes a project to integrate GIS, SCADA and online hydraulic model to assist water engineers in assessing the water distribution system. The integrated system simulates the flow and concentration of chemical contaminants online in municipality's water distribution system. The integrated system is a powerful tool for routine planning and emergency response and also for remote leakage detection and prediction of pipe burst. The capabilities of the integrated system can greatly assist in the decision making processes for network asset inventory, rehabilitation requirements, and financial planning.

scholarly journals Operating experience and ways to improve the performance of the service water supply system at the Novovoronezh NPP II (Units 1 and 2)

2020 ◽  
Vol 6 (4) ◽  
pp. 253-260
Author(s):  
Vladimir P. Povarov ◽  
Dmitry B. Statsura ◽  
Dmitry Ye. Usachev
Keyword(s):  
Distribution System ◽  
Water Distribution ◽  
Cooling Tower ◽  
Water Distribution System ◽  
Cooling System ◽  
Cooling Water ◽  
Operating Experience ◽  
Supply System ◽  
Summer Period ◽  
Service Water

The operating experience of Novovoronezh NPP II-1 shows that, in the summer period, the temperature of the cooling water exceeds the design value: this indicates the insufficient performance of the service water supply system. The main factor that has a negative impact on the performance of this system is the formation of carbonate deposits on the cooling tower filler. At Novovoronezh NPP II-1, the cooling tower water distribution system was cleaned from carbonate deposits by the method of combined vibration and aerohydraulic impact. The tested method of cleaning the filler cannot be considered optimal, since the main stage that determines the entire cleaning duration is the assembly/disassembly of the cooling tower filler. It is necessary to continue research on the choice of a strategy for controlling the carbonate deposition rate, taking into account the revealed influence of the design features of the main cooling water pipelines and pipelines of the cooling tower water distribution system on the mechanism of deposit formation in the peripheral spraying area. As compensating measures to ensure the required temperature regime of the turbine plant equipment at Novovoronezh NPP II-1, it is practiced during the summer period to put the standby heat exchangers of the lubrication system and the standby pump of the nonessential services cooling water system into parallel operation. This solution is fraught with the risk of an unplanned decrease in the electrical load if this equipment is turned off in the event of a malfunction. To increase the operating stability of Novovoronezh NPP II-1 and -2 in the summer period, it is proposed to carry out a number of measures aimed at mitigating the negative consequences caused by the elevated service water temperature. Equipment upgrade options are evaluated, e.g., by installing an additional pump for the turbine building services cooling system and (or) laying an additional pipeline to supply part of the makeup water from the Don River directly to the suction pipelines of the pumps of the turbine building services cooling system.

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