In a M-mode representation in Fig b, pixels along the white vertical line in (a) are repeated parallel to each other over time. Figure 13b shows 5 s of repeated scans. For each heart beat a pulsatile wave travels through the arterial blood pool locally expanding the blood vessels. This expansion can be seen in B-mode as well as in M-mode representation. However, in B-mode (x ray protection) it is an event in time occurring over several image frames, whereas in M-mode this event is plotted as the horizontal axis and therefore easy to detect. White arrows in Fig. 13b indicate the temporal expansion of the blood vessel. Figure 13c shows a much more pronounced motion. The transducer was pointed toward the heart and is therefore either imaging the heart wall or one of the heart valves, showing the typical cardiac pattern.
M-Mode Ultrasound M-mode (also called motion-mode imaging) does not yield full frame images per se, but rather one selected image line is rendered as a function of time.This is used for displaying motion of, for example, the periodic movement of heart valves (medical equipment). Any abnormalities or temporal variations can be directly seen as an image on the screen. The B-mode cross-section of a carotid artery is shown in Fig a. Proximal and distal vessel wall delineates the dark vessel interior, as indicated by the arrows to the right. In a M-mode representation in Fig b, pixels along the white vertical line in (a) are repeated parallel to each other over time. Figure 13b shows 5 s of repeated scans. For each heart beat a pulsatile wave travels through the arterial blood pool locally expanding the blood vessels. This expansion can be seen in B-mode as well as in M-mode representation. However, in B-mode (x ray protection) it is an event in time occurring over several image frames, whereas in M-mode this event is plotted as the horizontal axis and therefore easy to detect. White arrows in Fig. 13b indicate the temporal expansion of the blood vessel. Figure 13c shows a much more pronounced motion. The transducer was pointed toward the heart and is therefore either imaging the heart wall or one of the heart valves, showing the typical cardiac pattern.
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Eleven useful methods
1, the air conditioning has been used for more than five years; 2, Move the machine for several times (the air conditioning units may consume part of Freon when emptying air during the process of removing); 3, the exposed crude pipe at the connection point (ie, low-pressure pipe) of the machine does not condense or is not cool in summer; 4, the wind come from the summer exhaust fan outside the machine is not hot; 5, the gas pressure (thick tube) in summer back should be not less than 0.4 MPa; 6, the operating current of compressor is less than the normal value in the nameplate; 7, the high-pressure pipe (thin tube) is frosting in summer; 8, the machine inside of the air conditioning in summer is icing or blowing fog (sometimes accompanied by leaking inside the machine); 9, the brass interface thick pipe outside the machine is not hot in winter; 10, there are leak points in the air conditioning; 11, the air conditioning is stopped after ten minutes of starting up (low-voltage protection, overheat protection). How to add Freon in the air conditioning? First, turn on the air conditioning; When adding Freon in summer, we can allow the air conditioning to run directly in the cooling mode. Because it is impossible to add Freon in the state of the heating operation, fluoride in winter, use a heating method to pull valve line, forcing air into the refrigeration state. Second, connect the fluoridation equipment; After the normal starting of air conditioning, such as ceiling air conditioner, connect the craft port side of the low pressure valve of the outdoor unit is connected fluoridation equipment. This process must drain fluoride tube of air and dirt. Third, manometry and fluoridation; Summer to observe low pressure and an ambient temperature of 32 degrees Celsius, the pressure control about 0.45MP; Winter observed when the high pressure in the heating, the pressure is stabilized controlled at about 1.7MP. Fourth, remove the equipment which is used to add Freon; To remove fluoridation equipment in the state of refrigeration, tighten the sealed cover in the machine outside, while removing the device in the heating state may cause the leaking of a lot of Freon. Fifth, finish the process of adding Freon. Check the air conditioning which is be suspected to be with leak points with bubbles produced by washing fine. www.airconditionings.cn has also constructed four state-level product performance- testing centers for packaged air conditioners, high-temperature-use air conditioners, air and water- cooled chillers and FCU & AHU. Moreover, a joint laboratory named Shenling-Siemens network-based professional lab for air-conditioning operating & monitoring system was set up in Shenling, which was the first lab of this kind co-constructed with Siemens in HVAC industry in china. Overview of Metal NozzleMetal nozzle occupies an important position in the field of industrial nozzles, and there are extremely extensive applications in various industries. Among them, the metal nozzle occupies a relatively large market share in the nozzle market. Currently, the number of domestic production of nozzle manufacturers is increasing, but the domestic technology is far less than the foreign technology, most of them are nozzles imported from foreign countries. The shortcomings of domestic production nozzle is the backwardness of technology R & D in the field and it is not enough to break the traditional mode of deficiencies, it can only start from a technical field, work hard to develop a more sophisticated industrial nozzle. The metal fog nozzle, due to its hardness, there are great difficulties in production. Metal Nozzle ClassificationNozzle has a wide application in every industry, in accordance with the different shapes and functions, it can be divided into the following categories: precision nozzles, fan nozzles, atomizing nozzle, spiral nozzle, desulfurization nozzle diameter nozzle, a conical nozzle, a rosin nozzle, dust atomizing nozzle,humidifier system nozzle cooling nozzle, dusting nozzle, fan nozzle, fine atomizing nozzles, and spray gun nozzles. The advantages of spray equipment and other metal nozzles are: good sealing, high hardness, high wear resistance, corrosion resistance, welding and the common advantages of other metal. Spray Nozzle ApplicationsCleaning series: metal nozzle in cleaning fields widely take advantages of the strong tightness of metal nozzle, high wear resistance, and corrosion resistance. In the field of cleaning mainly have: food processing plants, metal cans, and cover cleaning; cleaning metal hanging chain items, washing car; washing metal sieve sand; strainer and filter, pre-treatment of the metal surface; conveyor belt on iron ore cleaning; cleaning of fruits and vegetables; bottles cleaning; mills blankets, cleaning of the mesh; high-pressure cleaning; disinfection equipment in food processing plants; metal tanks and cleaning of the inner wall of the vessel; glass mirror industry cleaning; cleaning of electronic circuit boards; industrial equipment cleaning. Metallurgy Series: the metal nozzles in the metallurgical industry also particularly take advantages of the important metal nozzle corrosion resistance, and weldability, etc., and in the field of metallurgy it mainly has: billet casting cleaning, pickling; plant, sinter plant flue gas desulfurization; thin slab casting, coil cleaning; belt transfer stations handling dust control; mixer dust gray rolling mill outlet pressure; high temperature dust, cold rolled blowing emulsion; cooling of steel and steel pipe, converter dust removal; steel quenching, and high pressure. www.spray-nozzle.net is a high tech company which combined R & D, sales and production together. It has become one of the biggest manufacturers of spray nozzle in China after a development of more than 11 years. If you are interested in our products, welcome to have a look at our website! The article come from:http://www.game-dice.net/common-classification-and-application-of-metal-nozzle-2/ More about my article, you also can read:http://industrialgoods.bravesites.com The SMD adhesive refers to the adhesives of hardening agents, pigments and solvents which are evenly distributed in the red paste, which is mainly used to fix the component on the printed board, and generally it is assigned by the method of point coated.smt adhesive should have the following characteristics: 1, connection strength: adhesive patch must have a strong connecting strength, after being hardened, and it is not peeled even at the solder melting temperature. 2, the feature of dispensing: the allocation of the printed circuit board uses the method of dispensing frequently, thus the plastic patch is required the following properties: (1), the several of mount technologies (2), it is easy to set the supply amount of each component. (3), simple adaptation replacement parts varieties (4), the amount of dispensing is stabile Heatsink Compound 3, adapt to the high-speed machine: now the SMD adhesive must meet the high-speed dispensing and high-speed mounter, specifically, high-speed dispensing without drawing. Furthermore, in the process of high-speed mount and in the transmission of the printed circuit board, the plastic patches viscous have to ensure that the components do not move. 4, no drawing and no slump: Once the patch glue stick on the pad, components cannot be achieved with the electrical connection of the printed circuit board,adhesive sealant must have no drawing, no slump in the coating to avoid polluting the pad. 5, Low temperature curing: in the process of curing, with wave soldering and welding good does not have to go through the reflow furnace heat-resistant cartridge components, so they request that the hardening conditions must meet the features of low-temperature and short time. 6, the feature of adjustment: reflow soldering, pre-coating process, the plastic patch is cured first before the solder is melted, the fixed component, and it will hinder the components sank solder and self-adjustment. Therefore, the SMD adhesive should have a certain degree of self-adjustment. www.zscnr.com provide the following electronic adhesives and technology service: Flame retardant RTV silicone, yellow glue, white glue thermal conductive silicone (silicon) , thermal silicon grease (thermal paste), SMT placement glue, the screw glue, LED module potting glue, circuit board 3 –resisting glue, fast drying, two-component sealing glue, epoxy AB glue, lead-free solder paste, lead-free reducing slag, lead-free disposable flux and other electronic industrial adhesives and dispensing equipments. The article come from:http://www.chinahotelsupply.com.cn/index.php/the-features-of-smd-adhesive.htm More about my article, you also can read:http://chemicalrawmaterials.weebly.com
With the function diversification of smart phones, tablet PCs, digital cameras and other mobile digital devices, more and more people start to take advantage of these digital devices for work and entertainment on various occasions. Power consumption of mobile games, entertainment, Internet surfing, video etc. is great, and the attached battery is unable to meet the normal use of these devices due to low battery capacity, so the mobile power is popular in recent years, and there are also different mobile powers in the market. To really enjoy the powerful features of the mobile communications and entertainment, to choose a safe, stable, easy-to-use mobile power is necessary. Here's a brief look at how to choose the right mobile Power Bank:
First, see what storage media mobile power uses. According to the battery cells of the mobile power, it can be divided into four types basically: nickel metal hydride battery cells, lithium iron phosphate battery cells, liquid lithium-ion battery cells, and lithium polymer battery cells. Nickel-metal hydride battery cells and lithium iron phosphate battery cells has low voltage and big nominal capacity, but the actual output efficiency is low. Compared with the lithium-ion battery cell and lithium polymer battery cell, they have no advantage. If the product description indicates this kind of battery cell, don’t choose that. The lithium-ion battery cells can be divided into liquid lithium-ion cell and polymer cell. Compared with liquid lithium-ion cell, the polymer battery cell is relatively safer, no explosion, light weight, and mostly it is used in high-end digital devices, but currently the available polymer cell mobile power is very few. If consumers want to purchase an economical mobile power with quality assurance, LIJIE magic battery, and fashion wing series products are good choices. LIJIE has the most professional circuit and battery cell R & D team, it uses lithium-ion batteries of international standards and the international-leading intelligent circuit protection system, and new technology research and development in the field of mobile power is far ahead. And it strives to create the industry's most outstanding quality, which is a trusted professional brand for consumers. Second, check the safety performance of the mobile power Phone explosion is not nothing new, and we can imagine its harm. In fact, the mobile phone explosions happen because of the use of shoddy battery. Many mobile power in the market are assembled by using the poor quality battery and low-tech chips, the current output is unstable, and when charging for digital products, it will generate a lot of heat, not only the charging efficiency is low, but it is prone to short-circuit to burn out the expensive digital products. More importantly, the capacity of the built-in battery of the mobile power is bigger than the mobile phone battery capacity, once there is explosion, the consequences will be very serious. Therefore, I am here to remind consumers that when you are buying a mobile power, be sure to choose the product from professional and reliable factory, such as the LIJIE magic battery U50 series is a good choice. It uses the international-leading high-capacity amplitude core, which is safe, environmentally friendly, non-toxic, durable electricity, the chargeable and dischargeable cycles are more than 500, the service life is up to 5 years; and at the same time, it uses the MCU intelligent circuit design, and it has super strong protection function such as the cell intelligent protection, overcharge protection, over-discharge protection, short circuit protection, leakage protection, and many other protection features, consumers can be assured to buy and use it. Third, see the actual conversion efficiency of the mobile power Mobile power is a portable device integrates electrical storage, pressure rise with charge management in one. We know that electricity storage media commonly use lithium batteries in the market, lithium voltage is between 2.7-4.2V, the 2.7-4 .2 V voltage cannot directly charge other digital, because the lithium voltage of digital products is 2.7-4.2 V, the voltages of the same electric potential are not rechargeable. So the mobile power external output power must have boost system and boost the 2.7-4.2V lithium voltage to 5V, so that it can charge other digital products. As shown in the picture: But the problem has emerged: the conversion efficiency of some mobile power is quite low, even less than 50%, in this case, even if the nominal capacity of the mobile power itself is 10Wh, the actually output is only 5 Wh. So you should also pay attention to the conversion efficiency, but 99% of the mobile power manufacturers or distributors avoid this problem. As mentioned this parameter, the seeming high capacity mobile power actually has no application value, since its actual output capacity is too small, this affects the sales of the product! The LIJIE battery mobile power, such as the magic battery U50 series and the fashion wing M60 series have a high conversion efficiency, under rated power, its conversion is up to 90%, which is far higher than similar products, and more energy saving and environmental protection. Fourth, see the heating condition of mobile power under normal use The reason that mobile power gives out is that in the process of using, part of the battery energy cannot 100% output, part of it will be consumed in the form of heat in the internal circuitry of the mobile power, the higher the efficiency, the lower the heat will be, because of the energy losses in the circuit is less. Of course, the fever will also bring some serious problems, such as: thermal short-circuit combustion, high temperature accelerates aging of components. Fifth, choose the shape of mobile power At the same time to ensure mobile power quality, the fashionable and beautiful appearance cannot be ignored. This, of course, depends on your own personal preferences. Sixth, see the accessories and its additional features of mobile power When choose a mobile power, consumers can also making a comparison between different brands of mobile power accessories. This article come from:http://www.external-battery.net/News/14.htm More about my article, you also can read:http://industrialgoods.blog.fc2blog.net/ Spirally welded steel pipes and pipe fittings to attach and set up the norm," the introduction of further control the sector for stainless-steel pipe fittings, such as metal pipe joints from departments anxious that: stainless-steel pipe fittings compression-type pipe fittings and stainless-steel pipe fittings to attach using the thin-walled stainless-steel tube will have a brand new nation normal to attach the two things and construction specs will also have national requirements. The most effective spirally welded metal pipes for Day.
Contrary to what a great volume of folks think, Spiral welded pipe suppliers is mainly coil-shaped, being an option of getting cylindrical or spherical. It may be processed into quite a few varied styles. Several the main attributes of stainless steel tubes are, how thick they're able to be, and also the way a lot pressure they may withstand. The thicker the outside diameter and also the wall in the tube, the larger the stress it may take with out bending. Should you be getting tubes, you could obtain unique factors you need to search out for. Many of these are the grade with the metal, the thickness within the wall, and also the diameter from the tubing. You will need to also verify the combination of metals which have been utilized while creating the tubing. Need to you have to have the tubing for becoming personalized, lots of suppliers will get it done with a few additional payment. Industrial Pre-Galvanized Steel abs coated pipe are created to resist corrosion and as a result final for extended and shine like if it was by no means used. Although stainless metal will not be completely resistant to rusting specially beneath reduce oxygen or larger amount of salinity, it really is significantly greater than regular metal that is susceptible to rusting really very easily below any situation. Stain-less steel pipes are applied where there's a need of higher performance for any extended time. Stainless pipes are extra tough than typical pipes and therefore can prove to be a reliable part of fluid technologies. You'll be able to avail steel pipes in both seamless and welded sorts, according to your certain needs. To have personalized product, it is possible to now sketch the designs and specify the exact proportions to help the makers cater for you far better. In order to avail the top bargains, you are able to also opt for considerably greater particulars like completed proportions, nation of origin, mill check reviews, finished lengths, and warmth taken care of or annealed, etc. Then you will discover an exclusive variety of seamless pipes that come in large diameters for general support industries like petrochemical, aerospace, fluid transportation, nuclear vegetation, heat exchanger, structural, oil and fuel support etc. In addition, the participating pros on the drafting using the national prevalent - "stainless steel pipe fittings and pipe fittings to connect and install the standard" was discussed and decided around the thin-walled stainless-steel pipe fittings and pipe fittings to attach amongst the 3 principal suggests(card pressure-type, threaded, welded) for unique installation desires and specs to the building unit in accordance with widespread building, in line with national requirements for the relevant units to provide favorable circumstances for inspection and acceptance. www.szyms.net is the professional manufacturer specializes in materials of Pipe and Joint system, roller track and their related accessories. Your target products can be the combinations of our materials(pipes, roller tracks, metal joints .etc) flexibly, such as office facilities, warehouse and storage racking equipments, production lines, containers, display racks, furnitures and other house appliances etc, the aboved workable and practical products can be recycled nimbly according to the specific requirements. The article is come from:http://www.szyms.net/news/3.htm More about my article, you also can read:http://industrialaterials.blog.fc2blog.net Why call it Flip-flops?
Flip-flops are a simple type of footwear in which there is a band between the big toe and the other toes. Flip-flops (also called zōri, thongs, jandals, or a variety of other names throughout the world) are a type of open-toed sandal typically worn in casual situations, such as outside or at the beach. They consist of a flat sole held loosely on the foot by a Y-shaped strap that passes between the first and second toes and around either side of the foot. Massaging Flip Flops Advantages The massage shoe is a kind of the common widely used eva flip flops. It has many great advantages that other ordinary slippers don’t have. First,massage flip flops are suitable for different ages. The use of young people can play a certain role to promote growth; for the regulation of the endocrine system in the elderly, to alleviate all kinds of chronic diseases, anti-aging; as for young women there is a certain anti-obesity, and at the same time, it has a more significant role to alleviate the mental stress of the office workers, promote sleep, enhance memory, it is a necessity for many mode. Massage slippers wearing Tips The start wearing time of customized flip flops should not be too long, it is recommended that initially once a day, every 15 minutes to start a gradual extension of the general body and feet will adapt to a week or so, and then the time to wear every 40-50 minutes is appropriate. As for the frail people, that can be reduced to every 10 - 20 minutes, 1-2 times a day, proved no side effects. Temperatures above freezing can be worn after five minutes of walking legs, feet will feel back fever blood to speed up the cycle. When wearing for the first time, some people will have soles like acupuncture-like feel, from a medical point of view, the more powerful reaction of an acupuncture point, indicating that the corresponding acupuncture points related to parts of the body have more serious problem. Prolonged wear can open up the blood vessels pass through the sparse network, promote metabolism, mediation body balance, enhance the physiological function of the internal organs and improve sleep quality. www.flipflop8.com/ is a professional manufacturer engaged in the production and R & D of flip flop. Our flip flop contains beach slippers, EVA flip fop, rubber flip flop, massage flip flops, DIY flip flops, etc. We accept to produce custom design slippers with our excellent workmanship. OEM /ODM service is one of our distinct characteristics. Our years of endeavor and development make our company a leading flip flop supplier in the world market. The article is come from:http://www.chinahotelsupply.com.cn/index.php/you-should-known-about-massaging-flip-flops.htm More about my article, you also can read:http://industrialrawmaterials.techmaza.in 1.
Cucumber mung bean flour oil control filmMaterial: 1-3 cucumber, mung bean flour 20g Specific methods: 1. Peel the cucumber and place into the juicer to stir and then put into the refrigerator for use. 2. Mix the minced cucumber puree with mung bean flour into paste. 3. Evenly coat the film in the face and wash after lying and waiting for 15 minutes. Expert Tip: This Oil Control film is most suitable for some girls whose skin oil secretion excess in summer, even have blain, because the mung bean has anti-inflammatory anti-bacterial and deep cleansing effect, which also has heat detoxification function. So the oily skin girls can often use this method. The dry and hot weather is a hotbed of oil and blain, have cucumber green bean mask twice a week can clean up the pores and let the skin develop to oil. Natural ingredients, there will be no sense of irritation and sticky. 2. Strawberry yogurt oil control film Materials: 2 strawberries, 30 grams of yogurt Specific methods: 1. Wash the strawberries and cut in half, directly press with a spoon or place in the juicer to make into muddy. 2. Pour in the mask bowl and mix with yogurt, reconcile into easily deposited paste. 3. Evenly coat avoiding the eye & lip skin around, static dressing and wash thoroughly with water after the mask is eighty percent dry. 1 or 2 times a week. Expert Tip: The principle of the oil control film produced by reliabale face mask manufacturers is to stable the over-active sebaceous glands of the skin, supple oily skin to conditioning healthy state. The yogurt contains a large amount of lactic acid, the mild is relatively nature, which allows the skin to become soft and delicate. The strawberries are rich in vitamin C, but also can remove T District horny with the strawberry particles, and skin can restore a natural pale glossy, various skin types can use. 3. Apple cider vinegar mask Material: 10 ml apple cider vinegar, distilled water 100ml Specific methods: 1. Dilute apple cider vinegar with distilled water and place in the refrigerator for use. The proportion is preferably about 1:10. 2. Put the mask or mask paper into the prepared apple cider vinegar and fully immerse in water. 3. Affix to the face for 10-15 minutes and then wash with water. The number of times is indefinite. Expert Tip: To select the natural ferment preservative-free apple cider vinegar. Apple cider vinegar has very high VC content, which can rapidly remove aging skin, improve oily and yellow skin. Dry skin can also add honey to improve the moisturizing power. Apple cider vinegar can balance the skin's PH value, regulating water and oil, and thus play an oil control effect. The rich variety of vitamins can make your skin soft and delicate whether taken orally or applied externally. www.hknbc.com is specialized in OEM & ODM services. It mainly produces nonwoven fabric and its downstream products, wet wipes(adult wet wipes, feminine wet wipes, baby wet wipes, household wet wipes, etc.), cosmetics, and anti-bacterial products. There are four main categories: wet tissue line; facial mask; anti-bacterial products; skin care products. First, the economy affecting the commercial air conditionerCommercial air conditioning has a close association with the development of the economy, and therefore, the commercial air conditioner market in 2013 will change with the changes in the overall economic environment and show the new features. China's mission and direction are to expand domestic demand and protect the livelihood of the people, in addition, the core driving force for the development is rural urbanization. This analysis will undoubtedly give a strong confidence for the market, and as the world's largest commercial air conditioning producer and a huge potential consumer market, China will usher in a new round of development. The industry believes that the current economic crisis is in the continuous deepening of the stage with a wide range and huge impact. Second, the changes in the real estate marketDespite the global economic downturn make the pace of growth of commercial air conditioning slow down, while compared with the home air conditioning, commercial air conditioning receive relatively weak overall economic impact. The rapid development of domestic economy spawn the rise of a large modern commercial office buildings, hotels, shopping malls and supermarkets, which hold up a huge market space for commercial central air conditioning. Third, the industry undertakes the new hot spotWith the attention of the countries of central and western regions, central China and the western development strategy continued to implement the country's industrial transfer, the central and western regions to become the country's industrial base. With the improvement of the Midwest construction, industrial and commercial facilities, development and quality of life, the demand for central air conditioner products, widening the range of needs and demand levels have shown a complex and diversified development trend. The central and western regions of basic industries and real estate as the infrastructure equipment will usher in growth, central air conditioning, also expanded their needs. Fourth, the new trend of energy saving and environmental protection policies The development of commercial air conditioning industry is inseparable from the policy. Recently, the State Council approved again to increase the unit of energy efficient air conditioning products in the field of consumer goods, new fans, pumps, compressors, transformers, four categories of products to promote the upgrading of the consumption of energy-saving products in the industrial field. According to reliable sources, the research subsidies of relevant government departments in the commercial air conditioning chillers, multi-line have ended, and the related subsidies implementation details are being developed. Once this subsidy policies are carried out not only play a positive role in promoting the prosperity of the whole commercial air conditioning. www.airconditionings.cn has established a national postdoctoral scientific research workstation and two provincial technical centers. Shenling has also constructed four state-level product performance-testing centers for packaged air conditioners, high-temperature-use air conditioners, air and water-cooled chillers and FCU & AHU. The Green Grid recently announced public availability of a white paper that touches on a subject that is near and dear to us at Schneider Electric: energy efficiency with respect to uninterrupted power supply. The paper, titled “Evaluation of Eco Mode in Uninterruptible Power Supply Systems,” provides an extensive look at how using eco mode can improve data center efficiency and overall Power Usage Effectiveness (PUE) – saving significant sums of money in the process. Schneider Electric, of course, is on the forefront of energy efficient UPSs, having been the first company to achieve Energy Star qualification for a UPS.
The white paper, previously available only to Green Grid members, explains in great detail how best to employ eco mode and some of the key considerations. Chief among those considerations are understanding the quality of the power you’re getting from the local utility and the ride-through requirements of your IT power supplies, meaning the length of time that the IT equipment can continue to function during a complete loss of power. The power supply units (PSUs) of IT equipment (ITE) are designed to store a small amount of electricity in capacitors, providing ride-through time in the event of a power failure. We’re only talking milliseconds here, however, typically 10 ms to 50 ms. Here’s why ride-through time is important to eco-mode operation, according to the white paper: As stated above, every PSU will have a different supported ride-through time. Prior to implementation, it is imperative to know the ride-through capabilities of every ITE PSU that will be powered by the UPS and to know the transfer time of the UPS operating in Eco Mode. For example, if an Eco Mode UPS has a transfer time of greater than 10 ms, and it is paired with IT equipment that has ride-through capabilities of only 10 ms, the UPS may not be able to support the IT equipment. Therefore, Eco Mode is not a solution that should be implemented in that data center. With respect to utility power quality, the issue is whether power is within the voltage tolerance of the ITE power supplies and the UPS eco mode voltage settings. Again quoting from the white paper: When the utility power quality is outside the voltage tolerance, the ups backup power will transition to a more protective mode (VFI or VI) and the efficiency could be lower than expected. Understanding the quality of the utility power is important for deploying UPS Eco Mode in such a way that the data center will realize the expected energy efficiency improvements. When the stars align, however, those energy efficiency improvements can provide significant savings, and the paper goes into some detail on how to estimate what they might be. While warning that results will vary depending on various factors, The Green Grid provides an estimate of savings as a function of IT load, in kW or MW). The savings ranged from less than $100,000/year savings for 1 megawatt (MW) IT load to almost $500,000 per year for 5 MW load in a legacy data center. The paper details the assumptions behind those estimates. It also gives a long-term view of how those savings add up over the typical 10-year operating life of a UPS, using a net present value calculation. The savings range from more than $20,000 for a 100kW IT load to almost $1.2 million for a 5MW IT load. Figures like that should grab the attention of any data center operator. Check out The Green Grid white paper for all the details. While you’re at it you may also want to read a white paper APC by Schneider Electric published a while back on the same topic, no. 157, “Eco-mode: Benefits and Risks of Energy-saving Modes of UPS Operation.” www.everexceedcorp.com develop, design, and manufacture products to provide safe, reliable power solutions worldwide. EverExceed has operations on six continents including three manufacturing plants and two research & development centers, allowing our products be available and enjoy technical support all over the world. EverExceed now offers a full range of lead acid batteries (network & motive power) and Nickel Cadmium batteries covering a wide range of applications from sophisticated telecommunications, uninterruptible power supplies, AGV to emergency lighting and security applications, and offers a full range of Monocrystalline, Polycrystalline Solar Modules combined with PWM/MPPT solar controllers, Grid-off/Grid-tied inverter covering a wide range of applications from sophisticated telecommunications, Power Electricity, Remote Area Electricity applications. The article is come from:http://www.chinaphoneparts.com/index.php/ups-delivers-big-savings.htm More about my article, you also can read:http://industrialrawmaterials.webnode.cn/ |
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