http://danfoss.ipapercms.dk/refrigerationandairconditioning/RA/Solutions/US/Solutionsv232003/RSS.ashxRA PagesTue, 03 Jul 2007 12:28:35 +0200http://danfoss.ipapercms.dk/refrigerationandairconditioning/RA/Solutions/US/Solutionsv232003/http://danfoss.ipapercms.dk/refrigerationandairconditioning/RA/Solutions/US/Solutionsv232003/?Page=1http://danfoss.ipapercms.dk/refrigerationandairconditioning/RA/Solutions/US/Solutionsv232003/?Page=12007-07-03T12:28:35+02:00http://danfoss.ipapercms.dk/refrigerationandairconditioning/RA/Solutions/US/Solutionsv232003/?Page=2http://danfoss.ipapercms.dk/refrigerationandairconditioning/RA/Solutions/US/Solutionsv232003/?Page=27HO2007-07-03T12:28:35+02:00http://danfoss.ipapercms.dk/refrigerationandairconditioning/RA/Solutions/US/Solutionsv232003/?Page=3http://danfoss.ipapercms.dk/refrigerationandairconditioning/RA/Solutions/US/Solutionsv232003/?Page=3Vol. 2 Issue31Danfoss Dependable. CONTENTS Volume 2, Issue 3 Leadership is action, not position. This quote from Donald H. Mc Gannon, former CEO of Westinghouse Broadcasting, states perfectly the attitude that takes individuals and companies to the forefront. In this issue of Solutionswe feature the theme Leadership because it is something we think about every single day. Danfoss has established a goal to be in a top position in each of its core business areas, which means the entire company must stay tightly focused and act as a leader. Keeping a leading position is not only about creating an organization that pioneers product technology and market development. It requires working together with cus tomers to develop solutions that help them achieve a leading position. In this issue youll read about precisely that type of collaborative leadership. We welcome your comments. THE EDITORS, solutionsdanfoss. com www. northamerica. danfoss. com Leadership Reaching for the Stars . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Leading Medical Center in Florida Goes for Smart Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Components for Cool Control in Chillers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Pumping It Up with Drives Technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Bi Metal Connections for Performance and Protability . . . . . . 8 Breakthroughs in Used Oil Cut Environmental Damage and Disposal Costs . . . . . . . . . . . . . . . . . . . . . . . . 10 Variable Frequency Drives for Supermarket Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Product News . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Jeff Duncan North America Motion Controls Nick Farrara Danfoss Flomatic Jennifer Hutchins Corporate Communications Aneta Stephens North America Heating Lisa Tryson North America Air Conditioning and Refrigeration DANFOSS SOLUTIONSis published for the benet of Danfoss customers. Information in the DANFOSS SOLUTIONS may be republished only with permission of editorial and always with credit to DANFOSS SOLUTIONS. Comments, suggestions, and contributions are welcome. This publication should not take the place of appropriate technical or legal advice related to companyspecic circumstances. DANFOSS SOLUTIONSdoes not assume any liability of any kind whatsoever for the use or reliance upon the information contained in this publication. Design by Arista Advertising, Inc. www. Arista Advertising. com Dear Readers, 2007-07-03T12:28:35+02:00http://danfoss.ipapercms.dk/refrigerationandairconditioning/RA/Solutions/US/Solutionsv232003/?Page=4http://danfoss.ipapercms.dk/refrigerationandairconditioning/RA/Solutions/US/Solutionsv232003/?Page=4Vol. 2 Issue32Danfoss Dependable. 2007-07-03T12:28:35+02:00http://danfoss.ipapercms.dk/refrigerationandairconditioning/RA/Solutions/US/Solutionsv232003/?Page=5http://danfoss.ipapercms.dk/refrigerationandairconditioning/RA/Solutions/US/Solutionsv232003/?Page=5Vol. 2 Issue33Danfoss Dependable. I n the summer of 1969, the whole world watched as the United States demonstrated its leadership in space technology. Neil Armstrong stepping from Apollo 11 to the moons surface with his famous words, Thats one small step for a man, one giant leap for mankind, remains one of the most indelible images of leadership in history. Leading up to Armstrongs momentous step, it took many people and many years of work and ingenuity to build a spacecraft that could reach the lunar surface. The point is that leadership does not happen in a vacuum. This is also true in the business world, where being a leader means being innovative, building strong partnerships, and never falling into complacency. Size, earnings and market dominance are measurable ways to gauge business leadership. But in the end, strong values, productive relationships, and focused strategies keep a company at the forefront. The challenge is that the front line is always being pushed forward market changes, increased competition, and rapid technological development turn top positions into moving targets. It is essential not only to constantly develop products but also to implement those developments adeptly in a competitive marketplace. TECHNOLOGICAL EXPERTISE Working with companies that are at the lead ing edge of their industries leads to new devel opments in product technology. By partnering with customers and vendors, trendsetters gain stronger footholds in their respective industries and are better able to keep up with that constantly moving frontline of leadership. This type of teamwork often leads to technological breakthroughs. Danfoss has had the opportunity to work with the leaders in, for example, the fast food and soft drink industries to help develop advanced ef cient and environmentally friendly systems. In motion controls and heating business areas, the company is also working with leading companies to advance the state of art in areas such as industrial control and indoor comfort. In addition, intense research and development activities that involve cooperation with other industries and educational institutions have led to inventions in areas such as electronic control, water quality measurement, and alternative cooling technologies. True industry leaders know that combining strengths is the best way to achieve and main tain a top spot. In the meantime, that unfor gettable image of Astronaut Armstrongs rst step on the lunar surface continues to offer inspiration for leaders everywhere. COVER STORY LEADERSHIP2007-07-03T12:28:35+02:00http://danfoss.ipapercms.dk/refrigerationandairconditioning/RA/Solutions/US/Solutionsv232003/?Page=6http://danfoss.ipapercms.dk/refrigerationandairconditioning/RA/Solutions/US/Solutionsv232003/?Page=6Vol. 2 Issue 34Danfoss Dependable. M. D. Anderson Orlando is impressive both in ability to provide medical care and in its size. This new ten story stateoftheart facility contains over 220, 000 square feet, housing treatment areas and 10 specialty clinics. The center, itself serving 4, 000 people each year, is part of the sprawling downtown campus of Orlando Regional Healthcare ORH system, the largest medical center in central Florida and one of the top cancer care centers in the nation. In 2003, the M. D. Anderson Orlando opened a new 63milliondollar facility combin ing inpatient and outpatient services under a single roof. Previously the cancer treat ment facilities had been spread out among ve buildings in different locations. In addition to installing the latest technology in cancer diagnostics and care, the center emphasized creating a comfortable environment for patients and staff while being energy smart. An important part of that was developing an efcient indoor comfort system. The healthcare complex has a 1, 576bed capacity and annually serves 545, 000 patients, which means there are a lot of medical workers, patients and visitors who depend on the cooling system. THE BIG CHILL The central energy plant building houses ve centrifugal chillers with a gross total capacity of 5900 tons, producing chilled water that is pumped throughout the campus to multiple medical facility buildings. Prior to project design, the plant was operating four of the ve chillers at maximum capacity. The plant operates with one chiller out of rotation for redundancy. Several system anomalies prevented the plant from operating at its true potential. The big challenge posed by the design of M. D. Anderson Orlando was to retrot the central energy plant HVAC system and correct deciencies, so that the tenmillion squarefoot Center could be served without adding chillers. The additional chilled water capacity had to be delivered within the limitations of the existing underground water pipe sizes. Capacity had to be sustainable and the system had to comply with current Standards of the American Society of Heating, Refrigeration and Air Conditioning Engineers ASHRAE for energy efciency. The problem with the existing traditional primarysecondary pumping system was improper mixing of the chilled water primary supply and secondary system chilled return water in the decouplerbypass. The mixing had resulted in a net plant capacity loss and the chilled water generated was signicantly greater that the amount transmit ted to the terminal loads. To compensate for the loss, plant operators routinely increased secondary water ow, creating a temperature differential delta T lower than design, and expending tremendous amounts of excess energy. The plant capacity loss consumed approximately 20 to 25 of the gross chiller capac ity in a day, which means up to 1200 tons cooling deciency. Then there were the exist ing underground piping issues the piping could not be increased in size to carry the additional capacity necessary for the M. D. Anderson Orlando expansion. LLeeaaddiinngg MMeeddiiccaall CCeenntteerr in Florida Goes for Smart Cooling One challenge was to serve the new, expansive cancer center without adding chillers. The piping could not be increased in size to carry the additional capacity necessary for the M. D. Anderson Orlando Expansion. 2007-07-03T12:28:35+02:00http://danfoss.ipapercms.dk/refrigerationandairconditioning/RA/Solutions/US/Solutionsv232003/?Page=7http://danfoss.ipapercms.dk/refrigerationandairconditioning/RA/Solutions/US/Solutionsv232003/?Page=75Danfoss Dependable. Danfoss Dependable. Vol. 2 Issue35Danfoss Dependable. Prior to the addition of the cancer treatment center, four of the ve chillers had to run at almost 100 capacity during hot weather condi tions, which equates to most of the year in Florida. This translated into utility costs for the ORH in excess of 200, 000 dollars annually. VARIABLE PUMPING DOES THE TRICK The solution involved an engineered conversion to a Systecon Vari Prime TM variable volume primary water management system provided by Carroll Air Systems Inc. The applica tion involved outtting each of the constant volume primary pumps serv ing each of the chillers using Danfoss Graham VLT 6000 HVAC Series adjustable frequency drives for pump speed control with the Systecon Vari Prime software that controls the variable ow through the water chillers. This responds to the buildings chilled water ow demands and virtu ally eliminates waterow through the decouplerbypass. The secondary pump distribution loop is programmed by wiretowater efciency control, which operates the most ef cient number of pumps at all loads on the main chilled water system loop. As part of the construction project, the new M. D. Anderson Orlando facility med ical building was outtted with a Systecon tertiary variable volume pump ing system using Danfoss adjustable fre quency drives for pump control. With this system, there is no ow in the chiller bypass except to meet chiller evaporator minimum ow requirements at low loads with variable system ow ranging from 1, 000 GPM gallons per minute to the maximum ow of 11, 600 GPM. Closing the existing bypass and tying the variable primary and variable secondary pumps it added about 45 feet of head pressure capabil ity to the secondary pump system, allowing operation at lower speeds. Current campus planning includes a new Hospital for Women and Infant Care features, and an additional chilled water plant to supplement the existing system. These buildings are presently planned to receive this type of equipment. COOL RESULTS The pumping system now effectively responds to variable volume control, explains Mark Yankech, Mechanical designer with the architecture rm of Rogers, Lovelock and Fritz Inc. , which designed the M. D. Anderson Orlando facility and other large structures on the Orlando Health System campus. Last summer we were running four machines during peak periods at near 100 percent, and now four machines operate at 8085 of full load. The effect of the pumping system modica tions are most evident in the secondary water delta T. Prior to construction, the delta T was approximately 8 degrees Farenheit, the number now exceeds 13 degrees Farenheit. This translates directly into energy savings. The combination of the Vari Prime software with VLT 6000 HVAC Series drives reduces chiller startstop operations, and results in optimal chiller operation at partload and full load efciency increases the system temperature differential by allowing more cooling tons to be circulated per gallon of water. It also reduces the overall power input to the chiller plant. With the HVAC adjustable fre quency drives controlling pump speed under all load conditions, the system is highly energy efcient. The software sequences the chillers and pumps so they operate at their minimum kilo watt points. So far the owner has realized an imme diate signicant reduction in elec trical energy con sumed, increased system delta T, improved chiller capacity output, and runs fewer chillers even with the additional cooling load of M. D. Anderson Orlando. Chris Mills, man ager of Carroll Air Systems, Inc. says, Closing the bypass and increasing the water temperature differential equated to a signicant return on investment for the owner increasing delta T is return on investment. Historically engineers have been wary of systems that vary ow through water chillers for fear of equipment failure and evaporator bundle freezing. But the Systecon Vari Prime software avoids this by re2007-07-03T12:28:35+02:00http://danfoss.ipapercms.dk/refrigerationandairconditioning/RA/Solutions/US/Solutionsv232003/?Page=8http://danfoss.ipapercms.dk/refrigerationandairconditioning/RA/Solutions/US/Solutionsv232003/?Page=86Danfoss Dependable. Vol. 2 Issue3 A large central mechanical unit aptly called a chiller provides chilled water for these largest of airconditioning applications. Circulating chilled water through insulated pipe makes for a much more economical installation, especially in multistory buildings, and takes up much less potentially productive space than air ducts. Also the chiller systems refrigerant is localized to the machine room and condenser rather than being piped to each oor of the building. Not only is less refrigerant required, but also the exposure to leaks is greatly reduced. Regulating, conditioning, and monitoring the ow of refrigerant in chiller packages are an array of components that are basically the same as for commercial refrigera tion systems expansion valves, solenoid valves, pressure regulating valves, hot gas bypass valves, and check valves lter dryers and sight glasses and pressure controls. CRITICAL PRESSURE CONTROL Pressure controls do a critical job in chiller applications. Three types of control devices are required 1 a low pressure control to turn compressors on and off and maintain correct refrigerant suction pressure downstream of the evaporator and to stop the compressors if the system pressure goes too low, 2 a high pressure control to stop compressors that exceed the allowable head pressure, 3 an oil pressure control, again to stop compressors, in this case if there is insufcient oil pressure. Historically these controls have been mechanical, with pressure measured by a bel lows that in turn operates a mechanical switch. The control is connected to the system by a capillary tube. Often the low pressure and high pressure controls are combined in one housing, but three mechanical switches, and three capillary tubes are required. Electronic control of chiller systems has been in use for more than 25 years, with the computer controllers becoming predictably more sophisticated, so that now comfort and energy efciency can be regulated with a literally innite array of strategies to choose from. ELECTRONIC CONTROL FOR BETTER OPERATION, LOWER COSTS Some chiller manufacturers, in a more recent trend in chiller control, have begun to use electronic pressure sensors instead of mechanical pressure controls. Danfoss has led the way in development of electronic transducers and transmitters that are reliable, durable, and costefcient to meet the needs of these manufacturers and their customers. Electronic sensors supply a constant stream of information about refrigerant and oil pressure to the electronic chiller controller, which in turn controls the compressors and ow control valves. The control system is easier to install, requires less mainte nance, makes leaks much less likely, and provides accurate and driftfree control over the life of the installation. From a nancial standpoint, two pressure transducers can replace three mechanical controls for a savings in material as well as labor. Information provided by the electronic controls can be readily recorded and easily analyzed by computer in order to more effectively plan maintenance and do remote troubleshooting for the entire chiller system. Components for Cool Control in Chillers Forced air cooling is the norm for homes that use central systems and for small ofce buildings, supermarkets and retail stores, which often have multiple rooftop HVAC systems. But in truly large cooling applications like ofce and apartment buildings, malls, hospitals and civic structures, circulating chilled water is the usual method to remove heat and to cool the enclosed areas. AKS 32 Pressure transmitters used in chiller applications2007-07-03T12:28:35+02:00http://danfoss.ipapercms.dk/refrigerationandairconditioning/RA/Solutions/US/Solutionsv232003/?Page=9http://danfoss.ipapercms.dk/refrigerationandairconditioning/RA/Solutions/US/Solutionsv232003/?Page=9Vol. 2 Issue37Danfoss Dependable. PPuummppiinngg IItt UUppwith Drives Technology T o maximize the amount of natural gas that an oil well can produce, it is important to lower the water table in the well so that gas can more easily migrate upward. There are two types of pumps typically used to accomplish this task. One is a sub mersible pump and the other is a progressive cavity pump. Regardless of which pump type is used, the pump itself can quickly burn out if the well is pumped dry. Underpumping will allow a higher water table and the well will not produce as much natural gas as it can. This situation becomes a perfect application for a pump variable frequency drive VFD. Slowing the pump motor down provides added benets of energy savings and less wear and tear on the equipment. Today gas well operators typically use a manual method to measure the water column in the well and then adjust the speed of the motor drive accordingly. This method has several pitfalls. The well pump must be stopped in order to measure the level. More impor tantly, the water column in the well takes quite a long time to change when the pump speed is changed. It is necessary for the operators to repeat this process several times over the course of sev eral days to weeks, and then periodically recheck the level there after. Since these wells are often remotely located in patches of one Continued on page 8 Slowing the pump motor down provides added benets of energy savings and less wear and tear on equipment. The Wilson VFD system regulates water levels in oil pump systems. by Sanford Burris, President, New Wave Technology2007-07-03T12:28:35+02:00http://danfoss.ipapercms.dk/refrigerationandairconditioning/RA/Solutions/US/Solutionsv232003/?Page=10http://danfoss.ipapercms.dk/refrigerationandairconditioning/RA/Solutions/US/Solutionsv232003/?Page=108Danfoss Dependable. Vol. 2 Issue3 Refrigeration systems all require a precisely controlled means of admit ting liquid refrigerant into the systems evaporator, where the work of removing heat occurs. The evaporators ef ciency depends mostly on the expansion of refrigerant and its transition from liquid to gas. In many commercial systems, refriger ant metering at the evaporator inlet is the job of an expansion valve. In most cases, the valve is thermostaticthe valve opening is controlled to maintain a xed temperature differential between the inlet of the evaporator to its outlet. There are also automatic and electronic expansion valves. The expansion valve is a key to system efciency. Proper selection and setting of the valve are critical to system per formance. One of the jobs of Danfoss application engineers is to assist cus tomers in proper design and mainte nance of their systems. Danfoss has a history of innovation in valve technology dating to the com panys origin in 1933, when a new expansion valve was the rst Danfoss product. The companys leadership in research and innovation in valve tech nology continues today. TU Valve Advantages Traditionally, refrigeration and aircon ditioning valves have had bodies made Continued from page 7 to 50 or more wells at a sight, you can imagine the time and man power it takes to maximize production. The Wilson VFD System eliminates these problems by combining a Danfoss VLT variable frequency drive with a patented method that fully automates the process. The FM1100 sensing unit meas ures the water column in the well while the pump is operating. It then controls the speed of the VFD in order to control that level. Now you simply need only to start up the system one time through a single userfriendly operator display that both programs the drive and the level monitoring system. Over time the level of the water column will be maximized to allow each well to run at peak ef ciency while maximizing its natural gas production. The Wilson VFD System is fully operatorprogrammable and self tuning for maximum pump efciency. Basic features of every VFD System are two pulse inputs for ow rates four 4 to 20 m A sensor inputs two 0 to 5, 5 to 10 volt inputs data logging 1 to 60 minute intervals, user programmable MMC Card Technology for data storage 2 years of storage at 10 minutes rod speed and rod torque displays selftuning for motor selection automatic restart ability delay time and number of restart tries programmable. With two standard pulse inputs for ow rates, no additional ow equipment is needed, therefore reducing overall site cost. The Wilson VFD System is a costeffective solution to rising energy and labor cost, equipment maintenance costs and overall well efciency management. Maximizing the level of the water column allows each well to run at peak efciency. 2007-07-03T12:28:35+02:00http://danfoss.ipapercms.dk/refrigerationandairconditioning/RA/Solutions/US/Solutionsv232003/?Page=11http://danfoss.ipapercms.dk/refrigerationandairconditioning/RA/Solutions/US/Solutionsv232003/?Page=11Vol. 2 Issue39Danfoss Dependable. of brass, with copper tubing connec tions extending from the body so that a valve can be brazed to the copper piping of a refrigeration system. Flare connections, which require no solder, are rarely used today because of the danger of refrigerant leakage a brazed connection is completely tight and will not vibrate loose. In 1997 Danfoss introduced the rst stainless steel expansion valve. The TU valve was substantially lighter and much more compact than traditional brassbodied expansion valves. Stainless steel had numerous advan tages. It was easier to install in the often awkwardly placed small spaces where expansion valves have to t. Lightness meant that the valve was not as subject to vibration damage. Since stainless steel cannot be brazed, Danfoss developed bimetal connec tions for the TU valve. Rolling a sheet of stainless steel together with a sheet of copper under extremely high pres sure until the metals fuse forms the connection bimetal. The connections are seamlessly formed by another inno vative process called deep drawing. Bimetal connections have proved to make connecting valves faster, easier, and less costly for customers. Brazing requires raising the temperature of the copper to the level where solder will melt. Traditionally, that required so much heat that mechanical means large heat sinks or wet cloth wrap pings had to be used to keep the heat from being conducted to the precision parts inside the valve body. But since only the inner surface of a bimetal connection is copper, and since stain less steel conducts heat much less read ily than brass, the heat stays in the bimetal connection. Much less heat input is required, and no external means has to be used to keep the heat in the connection, so the brazing process takes less than half as long. With the industrys enthusiasm for bi metal connections on the TU expan sion valve family, Danfoss has begun to offer bimetal connections on larger brassbodied expansion valves used in airconditioning, and on a range of solenoid valves. Cost Comparison of Solid Copper Connections and Bimetal Connections Even though care is taken to cool the valve body during brazing, about 1 of traditional expansion valves using solid copper connections suffer unseen damage during the brazing process and require eld replacement. Manufacturers using Danfoss valves with bimetal connections have reported a reduction from 1 eld replacements to 0. 03. Since replace ments in the eld can cost as much as 900, a manufacturer shipping, for example, 100, 000 units per year can save 873, 000 by tting them with Danfoss valves with bimetal connections. What a Solenoid Valve Does. . . Solenoid valves are used wherever the ow of a uid liquid or gas must be inter rupted. Unlike expansion valves, which are modulating valves and can be fully open, fully closed, or anywhere in between, solenoid valves are either open or closed, and activated by a toroidal donutshaped solenoid coil around the valve armature being externally energized. Bimetal connections, used on expansion and solenoid valves, reduce brazing time in half and no wetwrap is required. 2007-07-03T12:28:35+02:00http://danfoss.ipapercms.dk/refrigerationandairconditioning/RA/Solutions/US/Solutionsv232003/?Page=12http://danfoss.ipapercms.dk/refrigerationandairconditioning/RA/Solutions/US/Solutionsv232003/?Page=1210Danfoss Dependable. Vol. 2 Issue3 D isposed petroleum and synthetic oil comprise a major source of pollution. A single gallon of used oil can contaminate over a mil lion gallons of drinking water, which poses hazards to human, plant and animal health. In 1980 Congress established the Used Oil Recycle Act and in 1992 developed a codied policy that assumes all used oil will be recycled. For industries that use large amounts of oil, turning the used product into energy not only makes environmental sense but is also good business. Energylogic, formerly Black Gold, is a pioneer in developing technology for burning used oil. The company, based in Nashville, Tennessee, offers usedoil water boilers and heaters, and its patented system is being embraced by industries across the nation. This includes transportation eets, transmission shops, car washes, manufacturers, and others. Danfoss Burner Components engineering team has worked closely with Energylogic on developing technology for usedoil systems. Businesses that consume an average of 1500 to 2000 gallons per furnace per year have achieved a return on their investment within two years. The savings comes through lower energy and disposal bills and diminished Superfund liability. The fuel ow rate on the smaller boiler model is 1. 4 gallons per hour, which saves up to 1, 100 dollars per month, on the larger boiler model 3. 5 gallons per hour, saving up to 3, 000 dollars per month. FUEL PUMPING PRECISION Energylogics system is based on pumping waste oil volume reliably and accurately. Unlike fresh oil, the viscosity of waste oil varies and during use also acquires impurities such as dirt, metal scraps, water, or chemicals. This means the fuelburning mechanism has to adjust to differences in composition. In Energylogic boilers and heaters, waste oil is preheated to 160 degrees Fahrenheit, ows to the burner assembly, turns to ne mist and is ignited. The system, which is suitable for used crankcase oils, ATF or no. 2 fuel oil, is as reliable and consistent as one run with only virgin oil. Our expertise is focused on knowing how to pump and combust the fuel efciently with very low emissions and the design of our furnace itself, in Used Oil Cut Environmental Damage and Disposal Costs BBRREEAAKKTTHHRROOUUGGHHSS2007-07-03T12:28:35+02:00http://danfoss.ipapercms.dk/refrigerationandairconditioning/RA/Solutions/US/Solutionsv232003/?Page=13http://danfoss.ipapercms.dk/refrigerationandairconditioning/RA/Solutions/US/Solutionsv232003/?Page=13Vol. 2 Issue311Danfoss Dependable. 11Danfoss Dependable. explains Robert Stevens, President of Energylogic. To achieve pump meter ing precision, the company ts its equipment with Danfoss fuel pumps, which Stevens says, gives an edge over competitors. The system runs as ef ciently and reliably as a traditional furnace and uses the same thermostat control. The pump requires no manual adjustment to maintain the proper fuel ow to the burner when the fuels viscosity changes. This elim inates the possibility of fuellean or fuelrich conditions that can cause incomplete combustion and harmful emissions in any combustion process. Energylogic worked with Danfoss to design the pump to include features that meet customers performance demands. The companies continue to work closely together as requirements change. Energylogic works with companies to ensure they meet the following Environmental Protection Agency stipulations that businesses burn only used oil that they generated or received from household oil genera tors that air or water heater has no more than a maximum 0. 5 million BTU input per hour and that com bustion gases from the heater are vented to the outside air. The system also meets UL and National Fire Protection Association standards. Stevens says usedoil burning technol ogy has come a long way in the past fteen years. The demand is consumer driven, he says. The regulations set a baseline threshold and then its our cus tomers who want the most efcient sys tems to benet their businesses. Danfoss type BFPW Fuel Unit Precision pumping is behind the effectiveness of the system. 2007-07-03T12:28:35+02:00http://danfoss.ipapercms.dk/refrigerationandairconditioning/RA/Solutions/US/Solutionsv232003/?Page=14http://danfoss.ipapercms.dk/refrigerationandairconditioning/RA/Solutions/US/Solutionsv232003/?Page=14PRODUCT HIGHLIGHTS 12Danfoss Dependable. Vol. 2 Issue3 VVaarriiaabbllee FFrreeqquueennccyy DDrriivveess for Supermarket Applications N ow available in the market is a new series of variable frequency drives specically designed for supermarket applica tions. The new models, type AKD, are part of the new second generation of Danfoss ADAPKOOL controls. The drives are easier to congure than earlier drives, and can automatically adapt to the motor they are working with. Danfoss Drive Pro array of serv ices support the new products. In supermarkets, VFDs are used with refrigeration compressors, condenser fan motors, and on HVAC fan motors. In all three applications, operating efciencies and signicant energy savings result. When used to vary the speed of a refrigeration compressor and net worked to a Danfoss AKC 55 rack controller, an AKD drive can act to offer a nearly innite range of capaci ties from the rack. This means that rack capacity can be controlled to exactly match the load on the refrig eration system with considerably less onoff cycling of compressors. Without the use of a VFD the only way to vary the racks capacity is to turn compressors on in different com binations. Each time a compressor is turned on, considerable energy is expended to overcome inertia and bring the motor up to speed. With a VFD on one of the racks compressors, and with the rack sized properly, the speed variation on that one compressor will provide all the capacity change necessary to meet 90 of the load variations the rack has to deal with. There is much less cycling, and considerable energy is saved. Wear on the compressors is also lessened, extending their useful life and reducing service calls. VFDs also nd applications control ling the speed of condenser fans. Here again, AKD drives function with an AKC 55 controller in most supermar ket installations. Although there are several choices for the control strat egy, one of the best is to use the vari able speed drive to raise and lower the speed of the fans, thus regulating the airow through the condenser to maintain a constant temperature dif ferential delta T between the outside air and the outlet of the condenser. This allows the head pressure the pressure on the discharge side of the compressor rack to oat between limits in order to provide greatest ef ciency at any heat load. The function of the condenser is to transfer to the atmosphere the heat removed from the refrigerated xtures as well as the heat generated by the compressors. All of the heat is carried away by the refrigerant, and any not reclaimed to heat the air in the store or the water used in the prep rooms and lavatories must be disposed of. The adaptive control algorithms used in the AKD drive are optimized for use with the AKC 55 rack controllers adaptive algorithms. On a rack, the combination allows both oating suction pressure and oating head pressure, with the AKC 55 continu ously balancing the two for best overall performance and efciency. The third way AKD variable frequency drives are used in supermarkets is to regulate the speed of the motors that power the stores HVAC fans. Since ASHRAE standards do not allow these fans to be shut off, they have traditionally been run whenever the store is open. Sometimes twospeed fans are used, but with a variable fre quency drive, the fan speed and the energy consumption can be reduced to a minimum whenever cooling or heating is not required. When called for by the intelligent HVAC program, the fan runs at exactly the speed needed to maintain correct supply air temperature for a comfortable shop ping environment. The number of conguration settings on the AKD drive has been reduced by more than 50. In addition, Auto Motor Adaption AMA can be selected, and the drive will test its controlled motor automatically, making a necessary but tedious part of getting the installation started a simple and troublefree process. AKD Variable frequency drives offer operating efciency and energy savings2007-07-03T12:28:35+02:00http://danfoss.ipapercms.dk/refrigerationandairconditioning/RA/Solutions/US/Solutionsv232003/?Page=15http://danfoss.ipapercms.dk/refrigerationandairconditioning/RA/Solutions/US/Solutionsv232003/?Page=15PRODUCT NEWS Vol. 2 Issue 313Danfoss Dependable. Gauge, Purge, Shutoff Applications Danfoss has introduced a new range of angle needle valves for gauge, purge, and shutoff applications. Designated type SNVST, the new valves have been designed for industrial refrigeration, as service valves used for pumpout, iso lating pressure gauges, and metering liquid or gas. The housing, bonnet, and the gasketed seal cap are made from low temperature steel with a zinc chro mate coating. SNVST valves provide favorable ow characteristics in either direction and are rated for high pres sures over a wide temperature range. A stainless steel spindle, that cannot be inadvertently removed, ensures safety and prevents blowouts. Danfoss industrial needle valves are approved for use with R717 and R744 CO2 as well as R22, R507, R404A, and other noncorrosive gasesliquids. Maximum operating pressure for the valves is 725 psig, and the full temperature range for the valves are 76 to 302F. Angle models are available in 14FPT x 14MPT and in 38FPT x 38MPT. For more information call 410 9318250. Externally Operated Angle Seat Valve for Industrial Applications At this years Clean Show in Las Vegas Danfoss introduced a new family of externally operated or airoperated angleseat solenoid valves that are insensitive to variations in media pres sures and operate over a wide tempera ture range. Externally operated valves are often chosen as a troublefree solution when a standard solenoid valve will not do the job. Externally operated valves allow very large ow rates and can operate at even zero differential pres sure and with high media temperatures in high viscosity and dirty media. They can operate in Eex areas by placing the pilot valve outside the area. The new Danfoss valves, designated type AV210, have high ow capacity and a unique servicefriendly design. Applications for Danfoss AV210 valves include commercial laundry, sterilizers and autoclaves, injection molding, and many others using water, steam, and noncorrosive media. The valve has no diaphragm and no small orice, so that there is no pressure drop across the valve even when used on laundry machines. The design allows for very high ow rates, with Kvvalues from 1, 110 to 17, 700 gallons per hour 4. 2 m3h to 67 m3h. The valves are available in AISI316 stainless steel or RG5 bronze, for a media temperature range from 22F to 356F 30C to 180C. Connection sizes are from 38to 2. SNVST AV210 100 ES 80 ES Valve Products A unique piston design in the AV210 enables high lift off the valve seat and ensures high ow capacity with little pressure loss. Extensive computer mod eling helped provide an internal path way design, that with the high piston lift, provides ideal internal media dynamics. The piston is attached to the armature with a wrist pin that allows tight seating even when dirty media might otherwise prevent. Manual capacity control is provided to regulate the valves opening percent age. A local visual open indicator is built into the actuator assembly, and an optional electrical position indicator can sense piston opening, closing, or both. For more information call 410 9318250. Danfoss Flomatic Releases Product Bulletin Danfoss Flomatic Corporation intro duces a new condensed catalog cover ing their check and foot vales. The new product bulletin includes valve product models ranging from 14 through 10, such as Series 80E, 100E and 60SE. The Unleaded Enviro Check valves in these series comply with California Proposition 65, the most stringent of state and proposed EPA guidelines for reduced lead content and leaching. The catalog also covers new valve products 100 ES 80ES, which feature durable internals for more aggressive applica tions. More products are also featured in the catalog. For more information call 518 7619797. 2007-07-03T12:28:35+02:00http://danfoss.ipapercms.dk/refrigerationandairconditioning/RA/Solutions/US/Solutionsv232003/?Page=16http://danfoss.ipapercms.dk/refrigerationandairconditioning/RA/Solutions/US/Solutionsv232003/?Page=16October ISH North America October 13, 2003, Las Vegas, NV. Danfoss booth 3442, For more information, call 9056766000 RSES Annual Conference and Exposition October 2, 2003, Sheraton, Nashville, TN. For more information contact www. successexpressmp. com 94th Annual RETA National Convention October 710, 2003, Hilton, Costa Mesa, CA. For more information, contact www. reta. com WEFTEC Annual Show October 1215, 2003, Los Angeles, CA. For more information www. weftec. org November AKC Supermarket Electronic System Training November 1819, 2003 Baltimore, MD. For more information call 4109318250 23rd Annual ABCO Tradeshow November 5, 2003 Terrace on the Park, Flushing, N. Y. December The International Work Boat Show December 35, 2003, Ernest N. Morial Convention Center, New Orleans, LA. For more information contact www. workboat. com First Annual HARDI Conference Heating, Air Conditioning Refrigeration Distributors International December 710, 2003, San Francisco Marriott, San Francisco, CA. For more information contact www. hardinet. org CALENDAR OF EVENTS Please mention that you read about the event in Danfoss Solutions HOW TO CONTACT DANFOSS BALTIMORE, MD 7941 Corporate Drive Baltimore, MD 21236 4109318250 Fax 4109318256 www. acr. danfoss. com, www. danfoss. comusic Refrigeration Air Conditioning Industrial Controls Components for Oil Burners GLENS FALLS, NY Flomatic Corporation 145 Murray Street Glens Falls, NY 12801 5187619797 Fax 5187619798 EMail omaticomatic. com www. omatic. com Water Controls LOVES PARK, IL Danfoss Drives 4401 N. Bell School Road Loves Park, IL 61111 8156398600 Fax 8156398000 www. namc. danfoss. com Drives Industrial Sales MILWAUKEE, WI 8800 W. Bradley Road Milwaukee, WI 53224 4143558800 Fax 4143556117 www. namc. danfoss. com, www. na. water. danfoss. com Danfoss Graham HVAC Danfoss Water Wastewater Nessie Water Hydraulics MISSISSAUGA, ONT 7880 Tranmere Drive Mississauga, ON L5S 1L9 Canada 9056766000 Fax 9056760279 www. danfoss. ca Heating Controls Motion Controls SOMERSET, NJ Danfoss Bauer 31 Schoolhouse Road Somerset, NJ 08873 1212 7324698770 Fax 7324698773 www. danfoss. comdrivesus Gearmotors2007-07-03T12:28:35+02:00