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- Events at Kurukshetra 2011
- Condensate Polishers at Power Plant
- Philips EnduraLED
- Toshiba Libretto W100 - Review
- code to record data in csv file from gui matlab
- what is a cookie? and how it is useful in scripting languages?
- Intel now come up with its new CPUs - "Sandy Bridge"
- Generator Overvoltage Relay (59 G)
- CommuniGate Systems Nominated for Prestigious SPIFFY Award by Telecom Council
- CEoM December 2010 Title Winner is...
- *Quick Heal* CEan Of The Month December 2010 is...
- how electrical layout design is done in thermal power plant or industrial plant?
- G-Force
| Posted: 04 Jan 2011 09:34 AM PST A brief line-up of events:Coding:Engineering:Fun:Management:Miscellaneous:Online Events: Quizzing: Robotics: Workshops Engineering General Management Robotics School Workshop
Lectures Guest Lectures Video Conferences For more details, visit http://kurukshetra.org.in/ K++ K++ is Kurukshetra's very own tribute to the Open Source gurus. This is an online event which can bring delight to the hard core open source geeks as well as the dilettantes.
If you can answer 'yes' to any of the above questions, then the arena is for you. Here, one of the fiercest battles is fought to bring out software that would be available for use for the public, which is only one of the incentives, coupled with the fantastic cash prize and the sheer glory of being the best. The rules will be put up on the K++ website. The event has been launched! Visit http://www.kpp.kurukshetra.org.in/ for details regarding the event.. Happy coding :-). CONTRAPTIONS The battle of brains would be deficient without RUBE GOLDBERG.Yes!!! We are talking about Contraptions were KISS is strictly prohibited. Contraptions for K'11 getsBIGGER this time with an incredible task at hand. CONTRAPTIONS is one of its kind event which puts your basic engineering skills like mechanics, electronics and physics to test. Here you need to prove your mettle by unlocking your imagination and building the most complex structures on the foundation of elementary engineering principles to perform a task.Keeping in line with the past editions, present Contraptions guarantees the participants to characterize brilliance also take it a step further into the future. Enough of holding your fire .Let your multifaceted brains to fly out like a FALCON in the sky of Engineering. Check out the link for more details: http://kurukshetra.org.in/events/contra GOD SPEED Pulses racing, in tempo with the revving engines, the frenzy of the cheering spectators and the photo finish to crossing the checkered flag, Godspeed is Kurukshetra's answer to all the racing aficionados out there. This flagship event at Kurukshetra is the ultimate destination for the builders of Internal Combustion based roadsters. The prodigious event offers the best platform for the builders to showcase their work and win astounding cash prizes! And of course, as they say, there's that adrenalin rush that makes the race quite what it is. Check out the website for more details: http://kurukshetra.org.in/events/godspeed DALAL BULL The market goes up one day and goes down the next,yet can you consistently make profits irrespective of ups and downs? Do you have the zeal within you to foray into the share market and emerge as the ultimate victor? Then here is the perfect ambo to make it viable in an impressive way..! Dalal Bull is a simulated stock market for beginners to give them a shot at risk-free stock trading.The event simulates the ever-fluctuating mart and the judicious investor is awarded at the end of the forty-day ordeal. Kurukshetra's tryst with innovations goes on and this time its spread to virtual stock market. With change of schedule as 5 p.m. to 11 p.m, we hope to bring in a humongous number of participants from all over the world to dally with bulls and bears Event started at 5:00PM on 23/12/2010. Log on to dalalbull.kurukshetra.org.in. ATHENA Are you a programmer who is fine with math conceptually, but just don't like doing calculations by hand? Are you skilled to tell a computer what the math problem is and let it do the calculations for you? Throw your talent of solving mathematical problems using your coding knowledge at Athena - the math-coding contest of Kurukshetra'11. You don't need your Math Skills to be A Good Programmer but You Do Need Them To Be A Great One. Registrations open and Practice contest has started !! Visit www.athena.kurukshetra.org.in XCEED Xceed, the nationwide robotics and quiz challenge, is back, this time bigger than ever. The event, which has transcended geopolitical boundaries to bridge the knowledge gap by reaching out to the participants across the country, will be conducted this time in four cities - Bangalore, Hyderabad and Trichy. Xceed Robotics will happen in all four venues and the Xceed Biz-Quiz will be conducted in Bangalore and Hyderabad. Apart from winning tens of thousands of rupees as prize money at each venue, the winners will get a chance to face off against some of the best minds in the nation at the grand finale held during Kurukshetra! Get ready! We are coming to give you a taste of what Kurukshetra has to offer. Visit http://kurukshetra.org.in/events/xceed for more details. PAPER PRESENTATION: Ever eager to provide solutions for the world's problems? A firm believer that modern technology is the cure-all for all the world's ills? In the Paper Presentation of Kurukshetra '10 we test just how deeply your belief and expertise run. A list of topics have been given from which you can chose one and present your solution. Bewitch us with your brilliance and earn the appreciation of your peers. Visit http://kurukshetra.org.in/events/paper for more details WORKSHOPS: An interesting thing about engineering is the concept of practical training. At Kurukshetra, we swear by the principle that when you get your hands on it, you\'re mind will get it too. Workshops provide exactly this kind of teaching. Workshops, here, are dynamic, moving with the pace of the crowd, a fantastic place to meet other enthusiasts and yeah, you guessed it, FUN! Here expert guidance can be sought and found, to start off on a hobby or an idea or even progress across many levels of expertise. With a wide range of workshops spanning different fields of engineering, management, science and other hobby areas, there truly is something for everyone here. |
| Condensate Polishers at Power Plant Posted: 04 Jan 2011 08:39 AM PST Condensate Polishers at Power Plant "This article is talking about the functions of Condensate Polishers at Power Plants , and Their Types according to their Functionality , .. " Condensate polishers add operating reliability and flexibility -Condensate polishers are resin-based ion exchange systems that are commonly used in power plant condensate systems to remove dissolved contaminants (chlorides and silica) and suspended contaminants (iron or copper oxide particulates). Polishers maintain cycle purity and efficiency by controlling the effects of corrosion transport, condenser cooling water leaks, and condenser air in-leakage. Polishers do not make a system immune to chemistry issues, but they do lessen the impact of chemistry problems and often allow a plant to continue operating with a minor condenser tube leak or air in-leakage problem that might otherwise require an immediate outage. -In addition, condensate polishers are suitable for operation with high-performance chemistry programs such as all-volatile treatment (AVT) and oxygenated treatment (OT), they may accelerate plant start-up by minimizing chemistry holds, and they may allow a more orderly plant shutdown in the case of a significant water contamination. -Two basic types of condensate polishers are commercially available: deep- or mixed-bed and precoat condensate polishers. The two types have very different designs and are intended to address site-specific water quality issues found in the power industry. Option 1: Deep-bed condensate polishers -A deep-bed polisher is typically employed in applications requiring very pure condensate, where it's vital to remove every trace of contamination. This polisher contains a mixture of cation and anion resin beads in a bed about 3 to 4 feet deep. The resin mixture can consist of varying cation-to-anion resin ratios, depending on the amount of dissolved contaminants expected, with 2-to-1 and 1-to-1 resin ratios being the most common. -Due to the large volume of resin present, the ion exchange capacity of this type of polisher is high; however, its filtering capability is limited. Large quantities of total suspended solids can cause plugging and high pressure drop issues in deep-bed condensate polishers. Filtered particles may also cause fouling of the resin, particularly the anion resin beads, and loss of polisher efficiency -Deep-bed condensate polishers are favored in applications where high levels of total dissolved solids (TDS) are present (such as those using sea or brackish waters), where the plant must continue operation with small condenser leaks, and at plants that have minor air in-leakage control problems. -Nuclear power plants normally require deep-bed condensate polishers because their steam systems are sensitive to even minimal levels of contamination. The extremely low cation conductivity limits (<0.15 µS/cm) associated with operation on OT chemistry also call for deep-bed condensate polishers in supercritical and ultrasupercritical plants. Also, EPRI's latest AVT guidelines recommend condensate polishers on most high-pressure units, advocating that they maintain steam cation conductivity of <0.15 µS/cm. -When the ion exchange capability of a deep-bed condensate polisher is exhausted, the resin beads are cleaned and regenerated with sulfuric or hydrochloric acid and sodium hydroxide. The regeneration process may be external to the service vessels in an on-site regeneration station, in-situ in the service vessels, or off-site at a subcontractor's regeneration facility, depending on site-specific issues. -On-site external regeneration is the most common technique used today for deep-bed condensate polishers. The resin is sluiced out of the service vessel using water or water and air before being transferred to an on-site regeneration station. The cation and anion resin beads are separated into different regeneration vessels, dosed with dilute acid and caustic to restore the resin's ion exchange capability, rinsed to remove the residual chemicals, and then recombined. -Resin can also be regenerated in-situ by segregating the cation and anion resins right in the vessels, although the resulting level of polisher performance is usually lower due to cross-contamination of the resins. For instance, externally regenerated polishers typically have a sodium leakage of 3 µg/l or less, whereas an in-situ regenerated polisher may have a sodium leakage as high as 10 µg/l. Option 2: Precoat condensate polishers -Precoat condensate polishers use a thin coat of powdered ion exchange resin applied to specially designed retaining elements called septa to treat the condensate stream. To create the powdered resin mixture, resin beads are ground to about 200 mesh and mixed with a fibrous fill media. The powdered resin mixture is blended with water to create slurry that is applied to the septa to form a ⅛- to ¼-inch precoat layer -This thin coat of resin will remove some dissolved contaminants from the condensate, but its capacity is quite limited due to the small quantity of resin used. However, the elements do extremely well at filtering suspended particles from the condensate. Once the precoat condensate polisher is loaded with suspended solids or the ion exchange capacity is exhausted, the spent material is backwashed off the septa to waste and is replaced with a fresh layer. -This filtration approach is relatively inexpensive but quite effective when the suspended solids loading in the condensate is low. These filters are also able to remove oil and other insoluble organics from the condensate stream in addition to particulates. Because precoat filters must be recoated each time the differential pressure limit is reached, high particulate loadings can make this type of filter expensive. Effectiveness of the filter can also vary depending on the success of the precoat application. Filter early and often -A condensate polisher can also be invaluable on combined-cycle plants where the steam turbine original equipment manufacturer (OEM) includes a warranty limit (commonly around 0.2 µS/cm) for the cation conductivity of the low-pressure steam. The cation conductivity of this stream is typically 0.5 to 0.6 µS/cm due to carbon dioxide absorption in the water, which makes the OEM-imposed limit very challenging to meet. A condensate polisher will remove carbon dioxide in the form of carbonates and bicarbonates from the cycle. -Combined cycles used as cycling units have special water treatment challenges: They must balance the EPRI- and OEM-recommended chemistry action levels against guaranteed start-up times. A condensate polisher can be used on these units to reduce the level of contaminants in the steam/water cycle and ensure that chemistry limits do not play a major role in delaying unit start-up times. -Also, any steam plant with a drum pressure greater than 2,400 psia will easily vaporize boiler water contaminants such as sodium and chloride and carry them over to the steam turbine system, rather than leaving them in the boiler drum. This tendency will limit the effectiveness of blowdown as an easy chemistry control practice on drum units and lower the amount of condenser in-leakage that can be tolerated without rapidly increasing blowdown or shutting down the unit. Once-through boiler designs with main steam throttle pressures in excess of 3,600 psia must also use a polisher to maintain system cleanliness. -Air-cooled condensers (ACC) also present unique challenges for the water treatment plant designer. An ACC features a very large surface area to efficiently condense turbine exhaust steam, but the surface area can also upset the steam/water cycle chemistry balance. New ACCs are difficult to thoroughly clean and tend to contribute high levels of contaminates into the condensate during initial commissioning. -Condensate filters are usually included to remove oil and suspended solids from the condensate before the polisher to prevent the loss of efficiency and bed fouling problems. Filters are also recommended when high levels of iron are expected in the condensate return of an export steam system. -Finally, reclaimed wastewater is an attractive option for power plant cooling water systems in regions with limited freshwater for power plant use. The most commonly encountered reclaimed or graywater source is municipal sewage that is treated via a secondary and/or tertiary process. Though the TDS content of graywater is not as high as that of brackish or seawater, the risk of contaminating the steam/water cycle remains significant. A polisher provides protection to allow the unit to initiate a safe and orderly shutdown in case of a leak. "This article for , Colleen M.Layman is manager of water treatment engineering" |
| Posted: 04 Jan 2011 07:13 AM PST Philips' Master LED bulbs i.e. the company's new bulbs, dubbed EnduraLED, are four times as bright. Due in the fourth quarter of the year, the 60W equivalent at left sucks down only 12 watts of electricity but emits a reported 806 lumens of soft white light a ratio green enough to save the world, Philips claims, if only you'll buy in. Watch this: |
| Toshiba Libretto W100 - Review Posted: 04 Jan 2011 07:08 AM PST This is the official promotion video of the new Toshiba Libretto W100 7-inch dual-screen netbook. Share your views and opinions about this. |
| code to record data in csv file from gui matlab Posted: 04 Jan 2011 06:58 AM PST Hi, i'm new to Matlab. i have this code that extract image feature using gui. i have problem creating a code that can record data extracted into csv and txt file. i want the data extracted from image are recorded into a single csv file each time an image is load into the gui. the data will be use to train a neural network. can some one help me? tq Code: [filename, pathname] = uigetfile( ... |
| what is a cookie? and how it is useful in scripting languages? Posted: 04 Jan 2011 05:35 AM PST i need to know what extacly are cookies? and in javascript file untill you dont delete cookies, you wont get any changes reflected on screen.why? |
| Intel now come up with its new CPUs - "Sandy Bridge" Posted: 04 Jan 2011 04:58 AM PST Intel Brought all total 29 new CPUs in its 2nd generation of Core processors called Sandy Bridge. And the feature of which combine CPU and GPU in a single die and a big challenge for the AMD's fusion. And the best of this sandy Bridge is that it is based on 32 nm fabrication process and also incorporates both microcontroller and the processor graphics in a same die as a result of which it gives the better performance and also give the better power efficiency .Both CPU and GPU share on board last level cache(L3) of 1MB. The main aim of Intel behind this new generation processor is to give the better visual performance and smarter performance. |
| Generator Overvoltage Relay (59 G) Posted: 04 Jan 2011 04:17 AM PST Generator Overvoltage Relay (59 G) Overvoltage shouldn't occur on a generator fitted with an automatic voltage regulator. Overvoltage may be caused by defective operation of the voltage regulator under isolated operation of the generator. The relay detects the over excitation of generators and transformers by measuring the over voltage. Data for setting calculation Generator Voltage------------------------------------19000 V VT turns ratio ----------------------------------------19000 / 100 V = 190 The max. permissible voltage for continuous load operation --- 105 % The max. permissible voltage for no-load operation -------------- 110 % The max. permissible transient overvoltage ------------------------ 120 % Relay Setting 1- Setting Conditions The trip pickup is intended for moderate overvoltage of long duration. Pickup < The max. Permissible transient overvoltage . = 19000 / 190 * 1.20 = 120 V 2- Settings Channel Pickup Delay Function #1 106 % 2.5 Sec. Alarm #2 110 % 40 Sec. Trip #3 120 % 3 Sec. Trip |
| CommuniGate Systems Nominated for Prestigious SPIFFY Award by Telecom Council Posted: 04 Jan 2011 02:27 AM PST San Francisco: 4th January, 2011 CommuniGate Systems, the leader in super efficient, massively scalable Unified Communication multi-tenant hosting technology, has been nominated for the Telecom Council's coveted Graham Bell SPIFFY Award. Judged by 20 global carriers, this award "recognizes the company that advanced the noble cause of improving telecommunications." CommuniGate Systems develops the only fully unified communications solution for the multi-tenant carrier environment. Combining virtually all forms of communication including HD Voice & video, mVoIP, conferencing, PBX, collaboration, SMS, IM, e-mail and more into one platform with a universal client application called Pronto!, CommuniGate Systems delivers massive scalability, with exceptional features and unparalleled cost-effectiveness. "Being nominated for this award is truly exciting." commented Jon Doyle, Vice President CommuniGate Systems, "These awards are taken seriously through the telecoms industry, and being nominated for the Best Communication Solution is an honor that reflects our passion in providing exceptional communication solutions for our service providers partners as they build out their cloud environment for business and residential subscribers." "After reviewing over 100 other startups in 2010, our carrier members selected CommuniGate Systems as a company with the technology worthy of attention." stated Liz Kerton, President of Telecom Council. "Their attempt to advance the state of telecommunications by changing the way carriers deliver applications is high commendable." CommuniGate Systems will be announcing the 4th generation Pronto product portfolio with mobile clients for Android & iOS4 at Mobile World Congress in Barcelona this coming February. Visit us at Stand 7E40, for a live demonstration. Find out more about how CommuniGate Systems are driving innovation across the industry with our executive summits www.communigate.com/Bodrum/2010 End About CommuniGate Systems CommuniGate Systems develops carrier-grade unified communications software for fixed-line, cable and mobile operators to deliver value-added voice and multimedia services over their IP-based networks. The Company's software solutions enable service providers to deliver hosted, SaaS, or cloud-based communications, including Voice over IP (VoIP), Mobile Voice over IP (mVoIP), Unified Communications and converged mobile and fixed-line services cost-effectively at massive scale. The Company's software comprises of the industry acclaimed CommuniGate Pro, and the application suites Pronto, MobileOffice, UC Centrex, VoicePlus and MessagePlus. For more information visit www.communigate.com. Press Contacts: Scott Stonham CommuniGate Systems +49 30 2589 5018 public-relations[at]communigate[dot]com Distributed on behalf of CommuniGate Systems by NeonDrum news distribution service (http://www.neondrum.com) |
| CEoM December 2010 Title Winner is... Posted: 04 Jan 2011 12:12 AM PST Official announcement here: http://www.crazyengineers.com/forum/...er-2010-a.html |
| *Quick Heal* CEan Of The Month December 2010 is... Posted: 04 Jan 2011 12:10 AM PST *Quick Heal* CEan Of The Month December 2010 Is... *Quick Heal* CEan of the month September 2010 is... |
| how electrical layout design is done in thermal power plant or industrial plant? Posted: 03 Jan 2011 11:18 PM PST how electrical layout design is done in thermal power plant or industrial plant? |
| Posted: 03 Jan 2011 04:59 PM PST Hi guys, i'm trying to make a g force simulator. i trying to recreate the g force that occurs in a fighter jet during its flying. I'm doing design only i want a mechanism for that. |
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