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How do variable speed drives achieve energy saving

Variable speed drives regulate the speed of motors and in turn the speed of the fan or pump by controlling the energy that goes into the motor rather than restricting the flow of a process running constantly at full speed. A variable speed drive can save over 60% of the energy as it controls the energy at source, only using as much as is necessary to run the motor with the minimum speed and torque. Large amounts of energy can be saved on fan and pump systems, because of the affinity laws for pressure and flow rates. The Affinity laws state -Flow is directly proportional to speed Torque is directly proportional to speed squared Power required is proportional to speed cubed Therefore, this means that if 100% flow requires full power 75% flow requires 0.753= 42% of full power 50% flow requires 0.53= 12.5% of the power. Mechanical control methods such as inlet guide vanes, throttling valves, discharge dampers do not take advantage of the affinity laws. With mechanical flow control methods the motor always runs at full speed and the flow is mechanically restricted. The variable speed drive wholesale saves energy by reducing the actual speed of the motor when full flow is not required. A variable speed drive is fitted to the system and the discharge damper removed so there is no restriction to airflow. The speed of the motor is reduced to 40Hz which gives the same airflow as before when the motor was run at full speed and a discharge damper used. Now the input power is typically 50% of full load power. Therefore by using a variable speed drive, the power being consumed is reduced by typically 45%. Centrifugal Fans Massive potential energy savings using a variable speed drive compared to the two most common methods of flow control for fans: - Inlet guide vanes require about 60% power to give a flow rate of 50% - A discharge damper requires a huge 90% power to give 50% flow. The following table shows the typical input power to a motor when run at full speed with flow rate is restricted by an outlet damper compared to the typical input power when the same motor is run at reduced speed from a variable speed drive, achieving the same air flow rate as with the outlet damper. It can be seen that if an outlet damper reducing the air flow rate to 80% uses 95% input power, a variable speed drive achieving the same air flow rate uses 50% input power. The variable speed drive supplier make variable speed drives that can also stop a motor completely when it is not required as re- starting with a variable speed drive causes far less stress than starting direct on line - soft start is an inherent feature of the drive. Regulating the motor speed has the added benefit of easily accommodating capacity rises without extra investment, as speed increases of 5-20% is no problem with an AC variable speed drive as long as there is enough spare capacity in the system. If the variable speed drive has an internal PID loop, it will be possible to automatically control flow or pressure based on feedback from a sensor within the system. This can make further energy savings as the motor can slow right down if very little flow or pressure is required.

Knowledge of select Network Video Managment

The operating system Network video surveillance systems are generally used for long-distance, large-scale monitoring, continuous monitoring equipment takes a long time to run, which the proposed front-end equipment, particularly high stability requirements, stable network cameras need a stable operating system, no doubt embedded linux operating system is an excellent choice. Network camera on the market today are mostly embedded operating system, using more than Linux2.6 kernel, because Linux is free software and open source, low cost, safe, portable and strong, has served as the first online video operating system choice, is currently the judge the merits of one aspect of the network camera. Network Video Management System Services Modules, the product-rich external interface, and improve product features Rich network camera also requires external interface, to provide more value-added features, such as providing external alarm input and output interfaces; two-way audio interface; analog video output interface; supports MiniSD card memory; support POE power supply; RS485 PTZ control interface . Rich user interface to meet the special needs of the industry, giving system integrators and users is an unexpected surprise to meet specific functions.

Dynamic Network Factory subsidiary DNF Security, which is one of the pioneers in presenting best in class video storage solutions, offers Falcon DL VME & Falcon DL VME Cluster which are diskless video recording and management servers, having the ability to boot directly from the Seahawk 6GS Class IP SAN. This not only simplifies the deployment technique of video recording but also eliminates downtime, in case of failures, due to the single storage pool backup. So, the administrators can get some ease in the work functions and at the same time, reduction in the infrastructure costs can also be observed. DVRs typically utilize a computer operating system such as Windows or Linux along with Network Video Management Software.Analog CCTV recording systems have been the basis surveillance and monitoring for the past twenty years .Falcon DL VME is based on 64-bit quad core architecture and is having a 6GB high speed cache which ensures faster IO rates. There are dual copper gigabit Ethernet ports, which enable faster connectivity to internet via router. There is an integrated DVD R/W which makes it easy for disk based backup and addition of software applications. The whole system is based on a 64-bit operating system.

Digital video recorders are great devices which can help us to capture a memory at anytime. However, one thing which often deters people from purchasing one is the high price. If this describes you, the Coby Snapp camcorder can be a great choice. Going into the technical aspects of Falcon DL VME, it is having 5 cooling fans, in order to keep the temperature under control. This whole one unit 19 inches Rack mount chassis is offered with a dual redundant power supply. There are indicators, which indicate about hard drive activity, network activity, system overheat and power failure. Two RJ45 LAN ports and 2 USB rear end ports, simplify the management of connectivity interface. The temperature of this system must be maintained in between 10 degrees Celsius to 35 degrees Celsius or 50 degrees Fahrenheit to 95 degrees Fahrenheit. These highly versatile camcorders only cost around $30-40, which is an affordable option for nearly any budget.HDTV video at a network video recorder pricethat is affordable enough for homeowners.In addition, Lifeline Tamperguard is also available exclusively to those, who are using Falcon Diskless VME Cluster, where it offers alerts, when it is improperly configured and supports data continuity.

Various Types of standalone dvrs

Standalone DVR recorders give you the ability to pause and rewind live television. Many DVRs are set to record whatever is currently playing on the TV (sometimes in half-hour to one-hour bursts, before redubbing takes place). This allows users to pause the broadcast through their DVR if they need to leave the program for a moment or rewind it to replay something they may have missed. Some DVRs allow up to 300 hours of stored programming at a time. Dual channel DVRs allow the user to record two different programs at the same time. Many standalone dvrseven provide the ability to remotely view multiple standalone DVRs simultaneously like our DVR-2644S 4-Channel, DVR-2649S 9-Channel and DVR-26416S 16-Channel Standalone DVRs. The remote viewing of these 3 Standalone DVRs even permits you to view cameras from up to 4 different DVRs are taking the next step in technological capabilities. Even now, there are DVRs on the market that can be hooked into the Internet, allowing the user to record media from the Web for playback on the television.

In the early days, video from multiple security cameras were recorded using time-lapse VCRs and multiplexers. Due to recent advancements in recording technology, digital video recorders (DVRs) have started replacing many VCRs and multiplexers. DVR security camera systems record video on a hard drive-based medium, eliminating the need for a videotape. These sophisticated systems have the ability to manage multiple cameras as well as record and playback video locally or through the Internet.These units are available as kits which you install on your PC. You can also buy systems pre-configured with all the functionality you need for your Surveillance system. Use the link: PC based standalone dvr cctv Security to find out more.Before choosing a DVR, decide how many cameras you want to connect to it. The video recording rate, which is calculated in frames per second (fps), should also play a major role in your buying decision. For high-end security systems, opt for a DVR that has a high recording rate; however, a camera with a low recording rate would be sufficient to meet most security needs.

Advantages of embedded standalone DVRs Older models of embedded standalone DVRs were incapable of providing users with access via the Internet, a feature that PC-based DVRs were equipped with. This greatly limited the extent of use of this type of DVR, especially if multiple locations were involved. These days, though, standalone DVRs can be used in several locations, handling feeds coming from several units of security camera systems. This meant that embedded standalone DVRs could allow users to remotely monitor and track activities from several different locations at once.Let us see how setting up a multi channel standalone DVR can help you with both trends.As most stores already have 4- or 8- standalone digital video recorder systems installed, Another advantage of the embedded standalone DVR is that the operating system being used is not accessible to non-users, even if the system uses the Internet. This is an important feature in terms of security and safety because an operating system that is closed to other users helps prevent the threat of hacking attempts, worms, spyware and viruses. This also means that there is no need to obtain new security patches from the operating system manufacturer on a regular basis.

What about tar filter

No points for guessing, cigarette filters are made to reduce harms from tar and nicotine. We can hardly talk about the efficiencies of cigarette filters without first knowing the types of them and why are they chosen differently by different brands. Cigarettes, whether you bought them at superstore or from a neighborhood cheap cigarettes shop or a sale, remember the fact type of filters not withstanding, smoking cigarettes is always a cause of health hazards.In theory, tar filter are designed to reduce the toxic chemicals found in cigarette smoke. While these dangerous chemicals are not removed entirely, they are supposedly minimized with the help of a filter which can make smoking less dangerous. Regardless of smokers, cheap cigarettes or discount cigarettes, filters mean just the ends of cigarettes to quite a few of them. It is only those that are informed at least basically, might recognize filters as some sort of filtering unit that removes the dangerous nicotine and tar out of their enjoyment.

Cigarette smoking is hobbies for many people and a good quality filtered cigarette is perfect choice for millions of ardent smokers. Although there are many premium quality filtered cigarettes available throughout the globe, however cheap filtered cigarettes such as cheap Marlboro cigarettes, cheap menthol cigarettes, cheap camel cigarettes, cheap Winston cigarettes, cheap Virginia slims and cheap LM cigarettes are available at many online and offline cigarette stores. Using a tar bar filtersthat contains an ingredient such as salicylic acid may also help to not only moisturize the skin but to remove the scales that are associated with psoriasis flare-ups.The use of filter in cigarettes started during 1950s. The growing perception of unfiltered cigarettes as harmful substance initiated the research in the area and subsequently the filter cigarettes were made available in large quantities. A lot of amount was spent on the research and advertising during the period.

Filtered cigarette absorbs the various materials that can harm our body and therefore these filtered cigarettes should be preferred. The quality of filter is also an important factor that decides the cost and other aspects of filtered cigarettes. The main ingredients to be reduced by the filter were tar, combustion gases and nicotine. Actually people are addicted to nicotine and by the use of these filters, the intake of nicotine, combustion gases and tar in human body is reduced and therefore the quantum of cigarettes sometimes increases so that the requirement of nicotine in smoker's body is fulfilled. tar filters are usually made from cellulose acetate, and studies have shown that smokers commonly ingest and/or inhale some of these fibres. This happens because small fragments of cellulose acetate become separated from the filter at the end face. The cut surface of the filter of nearly all cigarettes has these fragments. Cellulose is the raw material used for manufacturing filters and it is obtained from wood pulp. It is first reacted with a substance so that the substituted diacetate of cellulose is formed and subsequently it is spun to obtain synthetic fibers.

The bathtub shower faucet for our bedroom

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IWhen designing a luxury bathroom, the first element that comes to mind as a necessity is space. Bathrooms are no longer just functional. Part of being beautiful is having plenty of room to show off the new features of your new bathroom. Unused floor space in the middle of an open design is a popular feature to make bathrooms feel more luxurious and upscale. wholesale waterfall bathtub Faucetwith an Asian design will also go along well with a Zen inspired bathroom. Vintage themes are also popular. You can add vintage glass fixtures for bathroom or look for modern floor mount bathtub faucets if you want a contemporary, modern look.Especially if you live in a cooler climate, you may want to consider installing floor heating pads under your tile, ceramic, laminate or floating wood floors to create a pleasant experience as soon as you step into your bathroom. This feature can be especially nice on cold mornings so that you don"t have to run from the cushy comfort of the carpet in your bedroom to the shower, traversing frigid floors in the process. While this may sound unsafe or difficult to install, it is actually becoming a more common feature in luxury bathrooms. A professional contractor can install the heating pads during the renovation process.