Showing posts with label operation. Show all posts
Showing posts with label operation. Show all posts

1 Sept 2014

Hi Whitepaper Week's Choice! Hi Cold Chain: Best Practices & Innovations.

Hi Whitepaper Week's Choice! Hi Cold Chain: Best Practices & Innovations.


With technological and operational advancements, supply chain professionals are more equipped to efficiently manage their operations.
Evolving the Cold Chain: Best Practices and Innovations explores these developments, details the recent evolution of the REFRIGERATED supply chain, and discusses how supply chain professionals benefit by implementing these practices.
Across warehousing, transportation, container technology, and other areas, learn how to progress your operation to better address the sensitivities and complexities of handling and transporting temperature-sensitive freight.
Download this free white paper to learn more. 
Click the following link here or view & save below;


4 Aug 2014

Hi Industrial Shape! Hi Miners! Special Feature! You & The Mines!

Hi Industrial Shape! Hi Miners! Special Feature! You & The Mines!

Miners Download Booth!


*Special Report On Mining Innovation, Click The Following Link Here To Download Report!.

Increasing productivity by improving collaboration across and beyond organisational boundaries, Click The Following Link Here To Download Whitepaper!.

* Business Risk Facing Mines & Metals Report 2014-2015, Click The Following Link Here To Download Report!. 


* Article Choice A Below;  Digital Tools for Mines Help Maintain a Competitive Edge!. 

!Digital Tools for Mines Help Maintain a Competitive Edge!


Many mining executives are convinced there’s really no alternative: either join the industry’s quickening interest in digital technology or risk losing ground;



By Russell A. Carter, Managing Editor E&MJ
The array of digital products and service choices available to mining companies is growing—as information technology (IT) consultants like to say—at the “speed of business.” For an industry that has traditionally viewed disruptive technologies with suspicion, generally espousing a “you try it first” approach, this can be an uncomfortable environment, particularly when commodity markets are soft and shareholders are closely watching how companies spend their money.
Recent survey results show that the industry realizes the demand for digital tools extends literally from its grass roots—exploration-data management—to daily operational and human-resource activities, and to the sophisticated enterprise resource planning (ERP) systems needed to make strategic business decisions. A company’s move toward higher operational efficiency based on effective use of data may no longer be defined, or confined, by what can be gained travelling the narrow lanes of a digital “highway.” In the future, it’s more likely to take the form of a digital immersion affecting almost every factor of mining activity, from the way projects are designed and managed to the tools and devices mine personnel will use—and wear—while on the job.
Surveys also indicate that many mining executives realize there’s really no alternative; either participate in the industry’s gradual embrace of digital technology or risk losing a competitive edge.

Maintaining an Edge;

In North America, for example, mining sector corporate investment in digital technology has increased over the past three years, and will continue to rise as companies seek to disrupt traditional business models to maintain their competitive position, control costs and stay viable, according to an Accenture survey of mining executives in Canada and the United States.

One-quarter of mining executives surveyed by Accenture — a management consulting, technology services and outsourcing company—said their overall digital investment in the past three years has doubled or more. Almost all companies surveyed (93%) are satisfied with their digital investment and the associated business outcomes. In the next three years, 33% said they will significantly increase their digital investment, 63% will increase their spending modestly, while only 5% will keep spending the same. No companies surveyed are planning to cut back on digital investments in the next three years.
Nine out of 10 executives surveyed said a business strategy that incorporates digital technology will revolutionize the way they do business to a degree similar to the advent of the Internet in the 1990s, and will provide a significant source of value to the business. Companies that do not embrace digital will lose their competitive position and may face extinction, according to 88% of respondents.
“Now more than ever, North American metals and mining companies are turning to digital, a new frontier for metals and mining companies to improve operations, productivity and identify growth opportunities,” said Jose J. Suarez, managing director, mining (North America), at Accenture. “We know that mobility devices can be used to track maintenance and reliability— and provide miners with better status updates that result in faster decision-making. Also, with analytic and Big Data, the integration of resource modelling data and operation status can help metals and mining companies to better control operational costs.”
Even so, the survey shows there is more work to be done for digital adoption within the metals and mining sector. While some North American mining executives are investing in digital to gain a competitive advantage (58%), some said they are just trying to keep pace with their competitors (42%). Whether they are trying to stay ahead or keep pace with the competition, almost all mining executives surveyed (96%) are projecting an increase in their digital investment in the next three years. Three-quarters said they feel they are ahead of their peers when it comes to digital.
Currently, digital programs are driving strategic decision-making and commanding support from senior executives (83%), according to the Accenture survey. Four out of five executives surveyed are using digital technologies across IT, business operations, finance and human resources. Looking ahead to the next five years, mining executives believe digital will improve company productivity (73%), reorganize operations (65%) and optimize the supply chain (58%).

As they invest in digital technologies, metals and mining companies are hiring more digital talent (88%) and adopting new digital technologies (95%). When looking at overall company return on investment, analytic s and Big Data are believed to hold the most potential (65%), followed by cloud (48%) and mobility (43%).
Accenture conducted the on line survey in February, involving executives at 40 metals and mining companies from medium to large organizations across Canada and the U.S. The company said the survey’s margin of error is 12% with a 95% confidence interval.
Maintaining Control
Managing data has become a critical concern in the exploration community, according to a report released by Geosoft following a January 2013 survey.

When Geosoft conducted a similar survey in 2011, only 18% of respondents identified managing exploration data a matter of “critical importance.” Now, 44% of them do, with another 38% regarding it as a “top five issue.”
Geosoft, which provides software and services for visualizing and managing geoscientific data, said it collected information from 415 organizations around the globe. The 693 respondents represented a cross section of roles within resource and energy exploration companies, industry service providers, government, and educational institutions. More than 60% were from the mineral resources industry, with the remainder coming from energy (11%), government (9%), educational organizations (5%) and other sectors.
Some key findings:
  • Organizations are shifting data out of the hands of individuals and onto centralized servers. Forty percent of respondents now manage their drill-hole and geological data on a centralized server with a folder or file structure, while 51% manage geophysical and other survey data this way.
  • Respondents want tighter control over their exploration data and a more efficient workflow. About two out of three would prefer a single commercially available platform or an in-house solution as opposed to outsourcing their data management, hiring consultants, or allowing users to manage their own data.
  • Search tools, complicated workflows, data duplication and dependency on knowledge experts remain the biggest obstacles to data management.
  • Most organizations spend four to eight hours on data management per week, with some spending much longer.
  • The two most important outcomes associated with better data management were increased visibility and transparency for reporting and attracting investors (38%) and improved discovery rates (25%). Few (7%) considered a quick return on investment to be the most important outcome.
In summary, the report found that there is a growing need for effective data management in the exploration community in order to attract investors and improve discovery rates. Although organizations are getting better at centralizing their data on a single platform, more work needs to be done to increase data accessibility, reduce duplication, smooth workflows and lessen dependency on experts.
Software developers seem to understand that many of the data-related problems cited in the Geosoft survey are applicable to the entire scope of mining, and beyond. For example, to help drive greater collaboration at mining operations and with off-site offices and consultants, Dassault Systèmes GEOVIA recently noted that its Surpac underground mine design package and Minex coal geology and mine planning software are now directly integrated with GEOVIA Hub and its data-sharing capabilities. This ensures users have access to the right data, so that:
  • Project files are published into Hub, enabling users to easily verify they have the most up-to-date data.
  • Repetitive verifications on data are eliminated since version confusion no longer exists.
  • Auditing of a file’s version history shows who made changes to it and when.
  • Fast roll back to previous versions of data is available if required.
  • By facilitating simpler and more effective means of sharing data on site or with remote locations, personal and cross-functional productivity and confidence in data is increased.
GEOVIA noted that with under-performing mining assets impacting share prices, mining CEOs are looking to improve financial returns and boost free cash flow by driving growth through better management across the mining value chain. By making better and faster decisions from the rock face to the port, processes can be made more efficient, mineral resources used more effectively, and wasteful practices eliminated. The end result is a healthier bottom line and increased sustainability.

The ability to meet those desired results, according to IBM and other suppliers of Big Data solutions, is to recognize that a company’s IT resources can be buried under mountains of data from continuously flowing streams of monitoring and metric data from networks, servers, storage, databases, mobile infrastructure, applications running in external and internal clouds, events and operation logs, to name just a few. In fact, it’s estimated that 90% of the data that exists in the world today has been created in just the past two years.
Based on the results from the Accenture survey, it appears that mining executives are willing to spend money on information technology to meet this problem, but whether the investment reaps all the prospective benefits expected, or even achieves basic project objectives, is not always assured.
Maintaining Excellence:


One approach larger corporations are taking to ensure their IT-related investment goals will be achieved is through centres of excellence. According to The Hackett Group, a global business consulting company, leading businesses are increasingly implementing centres of excellence as a means of efficiently and effectively managing specific complex business tasks. Centres of excellence are teams of people with specialized expertise who work together to develop and promote best practices in their area of responsibility. Centres of excellence may provide subject matter guidance to the rest of the enterprise, or may deliver tangible business services. Examples of business tasks around which centres of excellence may be created include project management, quality assurance, regulatory compliance, business analysis, continuous process improvement, and enterprise performance management.


The most recent example of this trend is Rio Tinto’s launch of its Processing Excellence Centre (PEC) in Brisbane, Australia, the latest phase of its Mine of the Future technology and innovation program that, according to the company, is driving greater value by optimizing the performance of key international copper and coal operations. The Brisbane centre, said Rio Tinto, is a world-first, state-of-the-art facility that enhances monitoring and operational performance by examining processing data from seven of its operations spread across the globe.
An expert mineral processing team operating out of the PEC shares technical initiatives and solutions to colleagues on mine sites in Mongolia, the United States and Australia about how to maximize productivity and improve performance.
With the aid of a giant interactive screen, technical data is monitored and analysed in real time, allowing processing improvements to be immediately introduced and operational performance to be optimized. The company said a trial phase of the PEC has already led to various procedural enhancements, such as adjusting the flotation process, which increased the recovery of copper and gold at Oyu Tolgoi in Mongolia.
The PEC is also linked to copper processing at Rio Tinto’s Kennecott Utah copper operation in the United States, as well as five coal sites in Australia. Rio Tinto worked with JKTech, Schneider Electric, Metso CISA, iGATE and the University of Queensland through the Rio Tinto Centre for Advanced Mineral Sorting to develop the PEC.
Among these partners, Metso CISA has developed a number of Advanced Process Control (APC) tools that include OCS and OCS-4D software with embedded expert system, fuzzy logic, modelling and optimizing modules, MPC, neural networks, vision and acoustics analysis algorithms. Among its more well-known systems are VisioRock for rock/particle size measurement, and VisioFroth, for flotation froth velocity control. These and other CISA systems have been used at some of the world’s largest mines, including Escondida in Chile and Antamina in Peru.
Schneider Electric said its services support the analytics for the centre, and also provide regulatory control on instrumentation and data management for the seven mine sites.

Phil Barrett, Schneider’s global account director for Rio Tinto, said, “The PEC is really pushing the boundaries of technology in terms of communication architectures, virtual environments and remote connections. As a result, it has become a truly collaborative environment that centralizes many varied and complementary skills, leverage the vast experience and expertise of its people, to work as one team delivering significant savings to Rio Tinto.”
Schneider also announced in February the release of StruxureWare for Mining, Minerals and Metals, a suite of applications aimed at optimizing production operations. The StruxureWare suite integrates process control, operations management and energy management to “allow customers to gain actionable insight into their entire operation,” according to the company, which noted that with the ability to manage and analyze data generated in real-time, customers are able to reduce operation costs and waste and increase safety.
According to Schneider, the suite can improve energy efficiency by combining energy and production data to allow operations and energy managers to work together to optimize operational demands and energy and water consumption to reduce costs. In addition, it provides visibility into enterprise and supply chain performance and analyses results over time to identify areas for improvement.

The StruxureWare mining suite consists of:
  • Resource Advisor: tracks and manages energy and carbon costs;
  • Energy Operation: transforms data into essential energy information;
  • Plant Operation: combines energy and process data for visibility into asset performance;
  • Supply Chain Operation: optimizes the supply chain;
  • Power Monitoring Expert: collects and organizes data from the electrical network;
  • PowerSCADA Expert: manages the power network based on telemetry systems that transform data into useful information; and
  • Process Expert: integrates application control and supervision into a single environment.
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Maintaining Machine Productivity:

As an example of a solution focused on a somewhat smaller-scale application—but with important implications for producers of all sizes—IBM announced in February a new collaboration with Thiess, one of the world’s largest contract miners, to use Big Data to improve machine availability and operational productivity utilizing predictive analytic s and modelling technologies. This initial collaboration focuses on Thiess’ haul trucks and excavators to help unify asset management and business operations.

Many fleet operators still rely heavily on either a “fix-it-when-it-breaks” approach or time-based scheduled maintenance techniques. These methods often result in unnecessary downtime, premature component replacements, extra expense and lost production. They also do not explicitly factor in an individual piece of equipment’s actual condition and performance capability.
However, this trend is changing. Increased deployment of machine and environmental sensors combined with new data collection methods is enabling the development of predictive machine maintenance analytic s, which can help increase equipment availability, lower production costs and provide greater operational flexibility.
The IBM and Thiess collaboration integrates current and historical machine sensor data, along with maintenance and repair, operational, and environmental data to use as a basis for data-driven operational optimization. Factors such as repair and inspection history, payload size, sensorbased component alerts, operator variability, weather, and ground conditions are being used to construct models, which assess and predict the life of discrete components and the overall health of a piece of equipment. This information will enable decision makers to co-optimize maintenance and production decisions, resulting in better operational performance.
“Analytic s and modelling can offer great opportunities to improve our business, but we need to integrate them with our current processes in order to have a real bottom-line impact. Working with IBM to build a platform that feeds the models with the data we collect and then presents decision support information to our team in the field will allow us to increase machine reliability, lower energy costs and emissions, and improve the overall efficiency and effectiveness of our business,” said Michael Wright, executive general manager–Australian mining, at Thiess.
Early detection of even minor anomaly and malfunction patterns can be used to predict the likelihood of component failures and other areas of risk. This will dramatically increase the uptime of the equipment and improve Thiess’ ability to manage the full life of discrete components, overall machine health and the deployment of limited maintenance resources.
Matthew Denesuk, manager of Smarter Planet Modelling and Analytic s at IBM Research, said, “By combining knowledge of the physical health of the equipment with information about how it needs to be used, we are able to know when something is going to go wrong and what can be done to fix the root problem before that occurs.”
IBM said developing a unified predictive equipment and operational management system requires finding common connection between physical and computer scientists, who often operate with different skill sets and goals. The models used in this project bring together the physical and digital worlds by supplementing datadriven modeling that computer scientists tend to employ with information from engineers who have first-hand expertise about the mechanics of the equipment.
Predictive machine management bases decisions about a machine’s maintenance and operation on the actual condition or health at that given time. It also has the ability to predict the health of a given machine far enough in the future to enable decision makers to execute correct actions such as adjusting production plans or ordering spare parts.
As an example, IBM posited a mining scenario in which several haul trucks may be reported to need maintenance, while at the same time a substantial order of product is due for delivery in 11 days. The predictive machine management system will be able to look at a variety of options for addressing this problem, and provide a decision maker with a model-based prediction that if the trucks are loaded no more than 85% of normal capacity and driven at no more than 80% of normal speed, the failure probability over the next 11 days would be minimal. This allows companies to avoid costly downtime at the sacrifice of only a minor, temporary decrease in throughput.
Business analytic s is also at the heart of MineSight Performance Manager software, released in 2013 by Mintec. “MineSight Performance Manager is designed to fill a need for coordinated, actionable reporting, analytic s and decision support at mine sites,” said Mintec President John Davies. “Right now, this need is largely being filled by spreadsheets at many sites. Data for those spreadsheets is often cobbled together from multiple third-party sources, a time-consuming process, which brings with it the risk of error and misunderstanding.”
Mintec said the launch of Performance Manager builds on the functionality of MineSight Axis. Operators use MineSight Axis for real-time reporting of production data and dynamic design of blast patterns. MineSight Performance Manager adds improved data integration tools and a focus on business intelligence and analytic s via dashboards that offer streamlined displays. It supports data gathered with MineSight Axis Drill and Blast tools, and according to Mintec, includes model-to model reconciliation, fleet management system production data to model reconciliation, and mill to model reconciliation with data gathered by the MineSight Axis Grade Control tools.
Maintaining Mobility
Although getting control of the Big Data dilemma is likely a primary concern in corporate executive suites, rapidly advancing mobile digital technology offers an avenue for getting appropriate data and interactive capabilities to personnel on the ground.

MicroStrategy Inc., a provider of enterprise software platforms, announced earlier this year that Kinross Gold Crop. has deployed an iPad application using Micro-Strategy Mobile for its global mining operations. Kinross, the fifth largest gold producer in the world, has mines and projects in Brazil, Canada, Chile, Ghana, Mauritania, Russia and the United States.
MicroStrategy said Kinross sought a mobile solution that could address its diverse workforce, provide near real-time feedback on mining operations, and give regional supervisors the ability to input data directly from the mines without the need for PCs. According to Alexis Ricordi, director of project management, Kinross’ analysis of the available analytic s vendors included considerations for platform speed, ease of use, mobile functionality, speed to development, and total cost of ownership.
Kinross has taken the approach to develop once and deploy everywhere. “When developing dashboards at Kinross, we make sure that we design them to run on PCs as well as on mobile equipment,” said Ricordi. “One of the biggest advantages of MicroStrategy is that we can develop them once and they can be available to the users on multiple platforms.”
MicroStrategy said having a mobile application has benefited Kinross’ fleet management supervisors. The Kinross iPad application is used across multiple sites in different countries, and automatically changes based on the language needed. Additionally, with transaction services, the supervisors are able to input data directly from the field, which speeds up decision-making.
Last year, MicroStrategy conducted a survey on dashboard use among a diverse group of participants. Predictably, 78% of respondents said they would prefer to access their dashboards via a mobile device. In fact, mobile dashboard delivery was ranked as the most preferred method for receiving, viewing and interacting with dashboards. Yet, only 28% of respondents have mobilized dashboards; the majority still use desktop machines. Despite the rise of self-service analytic s and the increased adoption of mobile devices at large enterprises, users at most organizations remain tethered to desktop machines for their analytic s.
MicroStrategy maintains that today’s users are accustomed to on-the-go information in their personal lives, so it no longer makes sense to expect them to be restricted to a desktop. Having analytic s deployed as a native app on smartphones or tablets not only allows for mobility, said the company, but it also enhances the capabilities of information-driven apps by making full use of all of the sensor inputs available on mobile devices.
It’s a trend that seems to be gathering momentum, with many major industry vendors offering mobile apps that provide product catalogues, dealer contact information and more. A good example is Caterpillar’s Product Link, a remote monitoring and asset management solution, and its VisionLink interface, which the company says makes it easy for a manager to monitor data from a whole fleet and then zoom in for a detailed look at individual assets.
Fleet managers’ ability to monitor equipment remotely has been improved with the latest release of VisionLink, providing customers with a mobile optimized Web application, the ability to schedule automated delivery of VisionLink reports, and remote access to on-board payload system information.
The mobile application is available on iOS, BlackBerry, Android/Chrome and Windows operating systems. Introductory functionality enables viewing the location of assets on a map, tracking scheduled services, viewing fault codes and open alerts, and accessing idle, working and runtime data through a smartphone.
New productivity functionality leverage's existing on-board payload systems for wheel loaders and off-highway trucks equipped with such systems. Managers can remotely monitor information such as total payload moved per day and total payload per hour and per unit of fuel.
On the stationary-asset side, AVEVA, which provides engineering design and information management solutions for several industrial sectors, announced that its Everything3D (E3D) Insight application is now commercially available for project managers in the mining industry. This Windows 8.1 app enables mobile users to comment and approve E3D designs from a tablet device. Developed in collaboration with Microsoft, it provides the ability to inspect, comment upon, and approve designs at any time, from anywhere around the world, according to the company.

“Over the years, we have seen how many companies struggle to effectively collaborate across their supply chain,” said Bruce Douglas, senior vice president—product strategy and marketing at AVEVA. “AVEVA E3D Insight overcomes this challenge by providing an innovative and intuitive mobile platform on touch-enabled tablets and laptops connecting directly to the design model and its community of designers. The improved reach and efficiency of collaboration that AVEVA E3D Insight brings is an important component of AVEVA’s revolutionary Design for Lean Construction initiative. Initial feedback from customer evaluations, including WorleyParsons and Technip, as well as user meetings has demonstrated strong alignment with industry requirements.”

Hi Understanding the basics of amorphous-iron motors!.

Hi Understanding the basics of amorphous-iron motors!.

Understanding the basics of amorphous-iron motors;

' Motors made with amorphous iron have a niche in jobs calling for high-frequency operation and energy efficiency.


Most engineers think amorphous iron is an exotic material that is hard to come by. But the interest level in this metal is rising because its magnetic properties can promote energy efficiency in electrical machinery and power distribution equipment. So it is timely to review the properties of amorphous iron that make it useful as a component in electrical equipment.
Despite what many engineers think, amorphous iron is actually made in large quantities. Two firms now supply the entire world’s amorphous iron: Metglas in Conway, S.C., and Tokyo (a division of Hitachi Metals), and Advanced Technology & Materials Co. Ltd.(AT&M) in China. About 100,000 tons of amorphous iron is produced annually, with Hitachi Metals supplying the vast majority.
Typical amorphous iron is an alloy of iron with boron and silicon. Amorphous iron comes from these suppliers in the form of a thin (25-microns thick) ribbon or foil. This form factor arises directly from the process used to manufacture the iron:  Molten iron drips onto a wheel comprised of pure molybdenum. The molybdenum wheel is kept at a controlled temperature so iron hitting the wheel quenches quickly. The molten iron temperature drops at a rate of about 1 million°C/sec. This extra-fast quench freezes the iron molecules before they have a chance to form crystals, resulting in an amorphous structure that is much less orderly than that of crystalline iron.
 Click Image Here To Download .PDF Article.

Environmental Value Creation; Hitachi Metals;

Download this article in .PDF format click the following link here.
This file type includes high resolution graphics and schematics when applicable.
The amorphous iron harvested from the molybdenum wheel is necessarily thin. At thickness's exceeding about 25 microns, the temperature doesn't drop as quickly for the internal iron molecules. These internal molecules would have time to form crystals so the resulting metal would lose its uniform amorphous quality.
The disorderly structure of the amorphous iron lets it respond to changes in magnetic fields more readily than is the case for ordinary crystalline iron. The magnetic field change also causes eddy currents in the iron that are an additional source of loss, and the super thin nature of the amorphous iron limits these as well. Thus amorphous iron exhibits much less power loss, typically measured in units of Watts-per-pound or Watts-per-kilogram, for a given magnetic field strength than does crystalline iron.

26 Mar 2014

Hi VOD Systems.! Hi Building a Ventilation on Demand system? 4 things you need to know!.

Hi Building a Ventilation on Demand system? 4 things you need to know!.

Ventilation on Demand (VOD) is a whole-of-mine ventilation system, which is enhanced by coordinating the ventilation equipment settings for the needs of the mine on a real-time basis.


Ahead of Hard Rock Mine Ventilation 2014, Allison Golsby, CEO of ConsultMine discusses the impact of VOD systems and how they are offering new opportunities to reduce operational costs, improve efficiency and health & safety.

View & Read Furthur More Below; Click Here To Download Scope Of Information Document as below;

Visit Hi Wise Products Blog To View Our HARD ROCK MINE VENTILATION 2014 Publication Post & View Or Download The Event Agenda & Explore More Related Information By Clicking The Post Link Here.


Visit Hi Wise Products Blog & Other Related Hi E Community Blogs For More Mining Industry Ventilation Posts Of Useful Links, Information & Downloads, Click Here. To Visit Hi E Community Blog Click Here & View Table Of Blogger Contents For All Blogs Published & The  Blog Accessible Links. 

 Click Here To Visit Hi E Community.


30 Nov 2013

Hi Considerations for Choosing an Industrial Ventilation System!.

Hi Your Choices for Consideration of an industrial ventilation system!!!
 Email Hammam Sales Engineering Team

Industrial Ventilation Fan Systems can be a necessary component to any commercial or industrial operating company.  These ventilation systems benefit not only the productivity of your employees and machines, but can affect your company’s bottom line as well.  When considering ventilation systems for your building, there are five key factors to consider:

1.  Objectives of the Ventilation Fan System;
These are generally multi-faceted, from personnel comfort and employee health to increased production efficiency and more.  For example, are you looking to provide general ventilation for fume or odor removal, or are you looking for personnel cooling because of heat stress on employees? Ensure your objectives are overcoming the biggest problems and accomplishing the most important benefits.

2.  Budget;
Availability of money to finance the system is a key factor that must be considered early in the planning stage. The funds available will affect the objectives you set and influence the system of ventilation selected. Expenses include equipment, as well as mechanical and electrical installation costs.  In some cases you may set out a ventilation plan that takes two or more years to complete due to limited funding. 

3.  Practical Limitations within the Building;
There are certain limitations in any production environment. The location of heat-generating equipment, partitions such as pallet racks or machinery within the building, or large cross-sectional areas are a few. Other circumstances may be air circulation obstructions such as machinery, raw materials, or finished goods.  We see a lot of what we call “short circuits,” where ventilation fans are placed next to wall openings or loading dock doors.  Thus, air is brought in thru the openings and then discharged by the fan before it's had a chance to provide cooling within the structure.

4.  Common Sense Factors;
In planning a ventilation system, taking advantage of the location of exhaust fans and prevailing wind direction will aid the system’s efficiency.  Economy of “long dimension” is helpful in reducing the cross-sectional area of a building, thus minimizing needed air velocity. Significance of noise production of a ventilation system must be taken into account. Additionally, you will always want to use the cleanest, coolest air source to circulate through the building. Other considerations include other production equipment that depends on airflow to perform its intended purpose such as paint booths, dust and fume extraction systems, make-up air systems, etc.  

5.  Benefits of a Ventilation Fan System;
All companies want to realize economies from good planning.  The greatest benefit that can come from a well-designed ventilation system is that it achieves its basic purpose and design.  A system where all components work together is essential. Replacement of exhaust air with “make-up air” fans may be necessary. Good planning will also recognize the necessity for proper air distribution and circulation through an occupied building, not just exhausting bad air.

These five considerations, when accounted and planned for properly, will ensure a unified industrial ventilation system that accomplishes tangible benefits for a company’s productivity and profitability. There are many industrial ventilation fan system design manufacturers including Hammam Industries & Co. in Egypt who supply, install, maintain & service the fan system design equipment. Visit the web site click link here. Hammam Industries & Co. also specialize in providing all needs for air pollution & climate control projects & solutions.
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16 Oct 2012

Hi My Mechanic Re-visited!.

Hi My Mechanic Cooling Tower Revisited:


System Calculations

To properly operate and maintain a cooling tower, there needs to be a basic understanding of the system water’s use. Water use of the cooling tower is the relationship between make-up, evapora- tion, and blowdown rates. There are a couple simple mathematical relationships between the blowdown rate, evaporation rate, make-up rate, and cycles of concentration of a cooling tower that are very useful to understand the principal flow rates. 

The first relationship illustrates the overall mass balance consideration around a given cooling tower:

(1) Make-up = Blowdown Evaporation
In this case, the blowdown accounts for all system losses including leaks and drift, except for evaporation.
The second principal relationship defines cycles of concentration in terms of make- up flow and blowdown flow:
(2) Cycles of Concentration = Make-up ÷ Blowdown
This equation can be rearranged to either of the following to solve for the make-up rate or blowdown rate:
(3) Blowdown = Make-up ÷ Cycles of Concentration
(4) Make-up = Cycles of Concentration × Blowdown

If the evaporation rate and cycles of concentration are known, the blowdown rate can then be determined by substitut- ing equation 4 into equation 1: 


(5) Cycles of Concentration × Blowdown = Blowdown + Evaporation
Solving for blowdown:
(6) Blowdown = Evaporation ÷
(Cycles of Concentration -1)

Also, if the blowdown rate and cycles of concentration are known, the make-up rate can be determined by solving equation 4, and then the evaporation rate can be determined by solving equation 6 for evaporation:

(7) Evaporation = Blowdown × (Cycles of Concentration – 1) 


System Concerns

Cooling towers are dynamic systems because of the nature of their operation and the environment they function within. Tower systems sit outside, open to the elements, which makes them susceptible to dirt and debris carried by the wind. Their structure is also popular for birds and bugs to live in or around, because of the warm, wet environment. These factors present a wide range of operational concerns that must be understood and managed to ensure optimal thermal performance and asset reliability. Below is a brief discussion on the four primary cooling system treatment concerns encountered in most open-recirculating cooling systems.


Corrosion:
Corrosion is an electrochemical or chemical process that leads to the destruction of the system metal- lurgy. Figure 7 illustrates the nature of a corrosion cell that may be encountered throughout the cooling system metal- lurgy. Metal is lost at the anode(3) and deposited at the cathode.(4) The process is enhanced by elevated dissolved mineral content in the water and the presence of oxygen, both of which are typical of most cooling tower systems. 



Figure 7. Example of a Corrosion Cell.




There are different types of corrosion encountered in cooling tower systems including pitting, galvanic, microbiologically influenced (Figure 8), and erosion corrosion, among others (expanded


discussion is available at www.gewater. com/handbook/cooling_water_systems/ ch_24_corrosion.jsp). Loss of system metallurgy, if pervasive enough, can result in failed heat exchangers, piping, or portions of the cooling tower itself.


Figure 8. Microbiologically Influenced Corrosion (Source: Taprogge GmbH).





Scaling;

Scaling is the precipitation of dissolved minerals components that have become saturated in solution. Figure 9 illustrates calcium carbonate scale collecting on a faucet head. Factors that contribute to scaling tendencies include water quality, pH, and temperature. Scale formation reduces the heat exchange ability of the system because of the insulating properties of scale, making the entire system work harder to meet the cooling demand. An expanded discussion for scaling is available at the following link; click here.






Figure 9. Calcium Carbonate Scale (Source: Hustvedt).






Fouling;


Fouling occurs when suspended particles fall out of solution forming deposits. Common foulants include organic matter, process oils, and silt (fine dirt particles that blow into the tower system, or enter in the make-up water supply). Factors that lead to fouling are low water velocities(5), corrosion, and process leaks. Fouling deposits, similar to scale deposits, impede the heat exchange capabilities of the system by providing an insulating barrier to the system metallurgy. Fouling in the tower fill can plug film fill reducing the evaporative surface area, leading to lower thermal efficiency of the system.

Microbiological Activity;
 

Microbiological activity is micro-organisms that live and grow in the cooling tower and cooling system. Cooling towers present the perfect environment for biological activity due to the warm, moist environment. There are two distinct categories of biological activity in the tower system. The first being planktonic, which is bioactivity suspended, or floating in solution. The other is sessile biogrowth, which is the category given to all biological activity, biofilms, or biofouling that stick to a surface in the cooling system. Biofilms are problematic for multiple reasons. They have strong insulating properties, they contribute to fouling and corrosion, and the bi-products they create that contribute to further micro-biological activity. They can be found in and around the tower structure, or they can be found in chiller bundles, on heat exchangers surfaces, (see Figure 10), and in the system piping. Additionally, biofilms and algae mats are problematic because they are difficult to kill. Careful monitoring of biocide treatments, along with routine measurements of biological activity are important to ensure bio-activity is controlled and limited throughout the cooling system.(6)

Figure 10. Biofouled Heat Exchanger (Source: Taprogge GmbH).
(3) The anode in a corrosion cell is defined as the site where metal is lost from the system structure and goes into solution.
(4) The cathode in a corrosion cell is defined as the site where the metal lost at the anode is deposited.
(5) Low water velocities may occur in poorly designed or improperly operated heat exchangers, in the cooling system piping, or in locations across the tower fill where uniform distribution is not maintained.

(6) Beyond the operational and mechanical problems bioactivity causes in cooling tower systems, there is a human health issue if the system develops a specific bacterium known as Legionella. For more information regarding Legionella and Legionnaires’ disease go to www.cdc.gov/legionella/patient_facts.htm.


DECSA INSTALLATIONS REVIEW:

Closed circuit coolers
RIKSHOSPITALET HOSPITAL
VERONA GENERAL WAREHOUSE
ENI OIL COMPANY
BANCO DE ESPANA
ABB POWER SYSTEM

Centrifugal cooling towers
PRINCIPESSA SOFIA
INTESABCI BANK
NOYFIL TEXTILE FIBERS
TAMPEY SUBWAY
FERRARI
AGIP OIL CO.

Axial Decsaplast
MOPLEFAN
ELEOURGIKI OIL CO.
ZAMBELLETTI PHARMACEUTICAL CO.
FORD MOTOR CO.
BOEHRINGER PHARMACEUTICAL CO.
CROW CORK CO.

Metal axial towers
INTESABCI BANK
LEONARDO DA VINCI AIRPORT
SSAB STEEL MILL
UNDERGROUND SHOPPING CENTER
ST MICROELECTRONICS
FERRERO CHOCOLATES






 Hi MiMechanic Fans Revisted:

Fan Efficiency, An Increasingly Important Selection Criteria:

The Importance of Fan Efficiency:

Why is fan efficiency so important? As a general rule, successive generations of electronic enclosures such as personal computers, telecommunications cabinets, as well as system routers, pack increasing functionality into smaller and smaller spaces. Accompanying this trend is the need to remove ever higher levels of heat energy from within those enclosures. Thermal engineers will often force air through a system using fans to regulate the internal temperatures; however as the aerodynamic performance increases so will input power.
In modern day equipment racks it's not uncommon for the total fan load to be a significant factor in the system's power budget. Coupled with the advent of equipment efficiency legislation and a growing awareness of cost of ownership, fan efficiency is becoming a critical selection parameter. Engineers now need to gain an understanding of fan efficiency, balancing it against more familiar metrics such as airflow and noise.

Understanding Fan Static Efficiency:

Fan manufacturers typically provide static efficiency as the value of efficiency, while total efficiency includes the outlet velocity term. Fan total efficiency is calculated using total pressure. Static efficiency is calculated using only static pressure.
Positive static pressure is created as a fan moves air through a system. Negative static pressure is what all other components in the airflow path create as they resist air movement. Different fan types will generate different airflow values while creating a positive static pressure to balance the negative static pressure caused by system obstructions. The fan performance curve (see Fig 1) is a representation of the airflow (X axis) that a particular fan type produces to overcome given static pressure values (Y axis).
Total pressure is the summation of static pressure and outlet velocity pressure. Outlet velocity pressure does not contribute to a fans ability to remove system heat energy; therefore it's not normally included in fan efficiency calculations.

Calculating Fan Efficiency:

As with any energy converter, efficiency is the ratio of input and output power:-

Fan efficiency = Pout / Pin
Fan input power (Pin) is:-
Pin (Watts) = V <Volts> x I <Amps>

Fan output power (Pout) or airpower using Metric units is:-
Pout (Watts) = Air pressure <m3/sec> x Air flow <Pascal's>

Using standard units the formula becomes:-
Pout (Watts) = (Air pressure <inch H2O> x Air flow <cfm>) / 8.5

Example:-
A 48V fan drawing 1A working at an operating point of 200 cfm and 0.5 inch H2O
Pin = 48 x 1 = 48 W
Pout = (200 x 0.5) / 8.5 = 11.76 W
Fan efficiency = 11.76 / 48 = 0.245 or 24.5 %

The Fan Efficiency Curve:

Fan efficiency varies dramatically as a function of aerodynamic loading. Because airpower is the product of flow and pressure, a fan working in the free air condition (no backflow pressure) has zero pressure and thus is producing no airpower and by definition has zero efficiency. Similarly, a fan in the fully shut off condition (no flow) has zero flow and is also producing no airpower and zero efficiency. The peak efficiency of an axial fan typically occurs at a pressure point of 1/3rd the maximum pressure.

Figure 1 below represents a performance plot of a 120mm size axial fan with curves for both airflow and efficiency.

Figure 1: Pressure vs. Flow Curve - 120mm Axial Fan

As a general rule, fan efficiency increases with blade diameter and speed. Fan manufacturers are now focusing on higher efficiency fans, resulting in new designs with significantly increased peak efficiency compared to older designs. Table 1 provides an indication of peak efficiency values for different standard axial fan sizes and the comparative improvement with newer generation designs.


Table 1: Axial Fans Typical Peak Efficiency;


Form FactorOldNew
40 x 4010%25%
60 x 6014%30%
80 x 8016%33%
92 x 9218%35%
120 x 12024%40%
172 round35%45%

Fan Selection Taking Account of Efficiency:

Historically, fans were chosen by finding a standard form factor to occupy the available space and then matching airflow performance against system requirement; typically using free flow as a figure of merit. This approach has the potential for missing significant power savings which could be realized by carefully matching fan efficiency to the system operating point.
In the example shown below, (Fig. 2), selecting the fan based upon free air performance would favor the high flow fan option. Overlaying the system resistance line on the performance curve shows the high flow fan would achieve the required performance of 110cfm at 0.48 inch H2O.
However, comparing this fan efficiency at the operating point against an alternative lower free air flow fan design, it can be seen the second design would actually provide higher efficiency while still meeting the duty point.
Figure 2: Pressure Vs. Flow Curve with Fan Efficiency and System impedance

Benefits of Selecting High Efficiency Fans:

Higher levels of power are required to cool the large amount of heat generated by today's high end servers. As a result, more electrical power will be needed to be allocated to the system's cooling components. In some instances, 25% or more of the total power budget for a high end rack system is allocated to the cooling fans.
Using high efficiency fans has a cascade effect on system design. Power supplies can be down sized saving weight and space and the fans power distribution network can be minimized.
The long term benefit of specifying high efficiency fans is a reduction of ownership costs. Large data centers can contain tens of thousands of servers with anywhere between 10 and 50 fans in each.
A few percentage points improvement in the efficiency of every fan installed can quickly represent many thousands of dollars in annual energy savings.
High efficiency fans can be more costly than older fan types, and this can be seen as a deterrent. Engineers and purchasing managers should understand the wider implications of using these newer fan designs.
System level savings can result from the lower power requirements and substantial energy savings can be realized by the end user.

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