scholarly journals A numerical study on high-pressure water-spray cleaning for CSP reflectors

2016 ◽  
Author(s):  
Francesco Anglani ◽  
John Barry ◽  
Willem Dekkers
Keyword(s):  
High Pressure ◽  
Numerical Study ◽  
Water Spray ◽  
Pressure Water

scholarly journals Development of Hard Secondary Cooling by High-pressure Water Spray in Continuous Casting

2011 ◽  
Vol 51 (9) ◽  
pp. 1454-1460 ◽  
Author(s):  
Yoichi Ito ◽  
Takeshi Murai ◽  
Yuji Miki ◽  
Masayuki Mitsuzono ◽  
Takatoshi Goto
Keyword(s):  
High Pressure ◽  
Continuous Casting ◽  
Water Spray ◽  
Secondary Cooling ◽  
Pressure Water

Experimental and numerical study of high-pressure water-mist nozzle sprays

2016 ◽  
Vol 81 ◽  
pp. 109-117 ◽  
Author(s):  
H.M. Iqbal Mahmud ◽  
Khalid A.M. Moinuddin ◽  
Graham R. Thorpe
Keyword(s):  
High Pressure ◽  
Numerical Study ◽  
Water Mist ◽  
Pressure Water

Precision Cleaning in a Production Environment with High-Pressure Water

1992 ◽  
Vol 35 (4) ◽  
pp. 34-44
Author(s):  
R. Nagarajan ◽  
R. Welker
Keyword(s):  
High Pressure ◽  
Chlorinated Solvents ◽  
Disk Drive ◽  
Water Spray ◽  
Production Environment ◽  
Cleaning Efficiency ◽  
Contamination Control ◽  
Advantages And Disadvantages ◽  
Production Run ◽  
Pressure Water

The increasing contamination control requirements for disk drives, and the prevailing mandate to climinate chlorinated solvents in cleaning applications have allowed high-pressure water spray to emerge as an effective and environmentally sound method for cleaning. Certain substrates, such as machined metals and alloys, can be cleaned using high-pressure water to state-of-the-art cleanliness levels. Following developmental investigations in the laboratory, two cleaners utilizing high-pressure (up to 3000 psig), high-flow (up to 50 gpm) water have been procured for use at suppliers of critical disk-drive components. Acceptance-runoff, certification, and production-run cleanliness data pertaining two the two high-pressure cleaners are presented here in terms of liquid-born particle counts on contaminants extracted from substrates ultrasonically, or by means of a low-pressure water spray. Results indicate that residual particulate contamination levels on high-pressure sprayed parts may be lower by more than two orders of magnitude compared with those obtained by more conventional cleaning methods. The cleaning efficiency increases significantly with particle size. The importance of nozzle manifold design and placement, for both cleaning and drying, is demonstrated quantitatively with examples of the deleterious consequences of not optimizing them. The underlying cleaning mechanism is explained briefly. Potential advantages and disadvantages associated with high-pressure water spray cleaning are fully discussed, and recommendations are offered for utilizing this technology most effectively.

scholarly journals An outbreak of psittacosis in a bird park in Japan

2007 ◽  
Vol 136 (4) ◽  
pp. 492-495 ◽  
Author(s):  
T. MATSUI ◽  
K. NAKASHIMA ◽  
T. OHYAMA ◽  
J. KOBAYASHI ◽  
Y. ARIMA ◽  
...  
Keyword(s):  
Risk Factors ◽  
High Pressure ◽  
Cohort Study ◽  
Water Spray ◽  
Increased Risk ◽  
Chlamydophila Psittaci ◽  
Pressure Water ◽  
Student Interns

SUMMARYAn outbreak of psittacosis related to a bird park occurred in Matsue City, Shimane Prefecture, Japan, during winter 2001. Seventeen cases of psittacosis (12 visitors, three staff, and two student interns) were confirmed. A cohort study was conducted among the park staff and students to determine the risk factors for the development of acute serologically confirmed psittacosis (SCP) infection. Being ‘bird staff’ had an increased risk of SCP infection (RR 3·96, 95% CI 1·48–10·58). Entering the staff building, where ill birds were maintained without proper isolation, was also associated with an increased risk of SCP infection (RR 3·61, 95% CI 1·03–12·6). Isolation of ill birds and quarantine measures were found to be insufficient. Dehumidifiers and a high-pressure water spray under a closed ventilation environment may have raised the concentration of Chlamydophila psittaci in the hothouses. Bird park staff and visitors should be educated about psittacosis.

High-Pressure Water Spray Research Based on Neural Network

2010 ◽  
Vol 29-32 ◽  
pp. 138-142
Author(s):  
Rui Li ◽  
Zi Ming Kou
Keyword(s):  
Neural Network ◽  
High Pressure ◽  
Influencing Factors ◽  
Back Propagation ◽  
Back Propagation Neural Network ◽  
Industrial Processes ◽  
Water Spray ◽  
Key Factors ◽  
Pressure Water ◽  
The Relationship

The spray cleaning method is important and universal in many industrial processes and other occasion. Because the size of the waterdrop is one of key factors for cleaning, this paper not only studied the relationship between the size of waterdrop and other influencing factors, but also researched the forecasted method for the size of waterdrop. In lab, by measuring the size of the waterdrop, jetted by one kind of nozzle, data were acquired and were used to train the Back Propagation Neural Network ( BPNN ). Through comparing those diameters, between measured in lab and calculated by BPNN after trained. It was acquired that the maximum errors was smaller than 1.62%, between the computed results and the factual measured ones. The experimental results showed that BPNN is an effective tool to predict the variation of the non-linear waterdrop diameter.

scholarly journals Numerical study on laminar free convection heat transfer between sphere particle and high pressure water in pseudo-critical zone

2014 ◽  
Vol 18 (4) ◽  
pp. 1293-1303 ◽  
Author(s):  
Liping Wei ◽  
Youjun Lu ◽  
Jinjia Wei
Keyword(s):  
Heat Transfer ◽  
High Pressure ◽  
Free Convection ◽  
Fluidized Bed ◽  
Numerical Study ◽  
Convection Heat Transfer ◽  
Boussinesq Approximation ◽  
Convection Heat ◽  
Pressure Water ◽  
Free Convection Heat

Supercritical water fluidized bed reactor (SCWFBR) is a promising new reaction vessel which can effectively gasify wet biomass and efficiently produce hydrogen. Free convection heat transfer from particle in supercritical water (SCW) is a major basic heat transfer mechanism in a fixed bed or fluidized bed with low superficial velocity. In this paper, numerical study on the steady free convection heat transfer around single sphere particle in high pressure water of pseudo-critical zone was carried out. Both the Boussinesq approximation method and real properties model (considering variable specific heat, density, viscosity, and conductivity of SCW) were incorporated to simulate the flow and temperature field. With respect to Boussinesq approximation, real properties model shows higher vorticity and temperature gradients in the vicinity of the sphere surface, which shows variation of thermo-physical property has remarkable effect on the free convection heat transfer process. High local Nusselt number and high heat transfer rate were observed with real properties model.

Effect of washing with a high pressure water spray on removal of Listeria innocua from Gorgonzola cheese rind

Food Control ◽  
2008 ◽  
Vol 19 (5) ◽  
pp. 521-525 ◽  
Author(s):  
Germano Mucchetti ◽  
Barbara Bonvini ◽  
Salvatore Francolino ◽  
Erasmo Neviani ◽  
Domenico Carminati
Keyword(s):  
High Pressure ◽  
Listeria Innocua ◽  
Water Spray ◽  
Pressure Water

scholarly journals HIGH-PRESSURE WATER SPRAY APPLICATION FOR AUTOMATIC FIRE EXTINCTION IN THE UNDERGROUND

Vestnik MGSU ◽  
2017 ◽  
pp. 669-673
Author(s):  
V.P. Prokhorov ◽  
E.S. Vagner
Keyword(s):  
High Pressure ◽  
Cost Effectiveness ◽  
Water Spray ◽  
Spray Application ◽  
Fire Extinguishing ◽  
Production Processes ◽  
Pressure Water ◽  
Hazardous Production ◽  
Important Object ◽  
Fire Extinction

The paper is devoted to ensuring the fire safety of an important object for the majority of megacities as the underground. The author examines in detail the fire-hazardous production processes and talks about the use of high-pressure water spray (WS) for extinguishing fires at underground facilities as the most effective firefighting measures. The paper describes the advantages of using of high-pressure water spray for automatic fire extinguishing in terms of safety and cost-effectiveness.

Sign in / Sign up

Export Citation Format

Share Document