Buys Ballot s law


Backward-Curved Blades. In the backward-curved design (Fig. 3b), the blades incline backward (opposite to rotation direction) from the point of heel attachment on the wheel. The single-thickness blades may be either straight or curved, usually 12—16 blades to a wheel. Air leaves the blade at a velocity less than wheel-tip speed because the increasing flow passage through the blade provides for expansion of the air. This feature improves the mechanical efficiency over that of the forward-curved blade. The deep blades lend themselves to developing a high static pressure. Wheel diameter and speed are generally higher for a given performance than the forward-curved blade. Close clearance and alignment of the wheel with the inlet beU are important aspects of this design to obtain maximum efficiency, especially at high static pressures. Inaccurate clearances allow leakage of compressed air back to the suction side of the wheel. The pressure curve rises somewhat from shutoff with increase in flow until a maximum pressure is reached. The maximum efficiency is reached at 50—65% of wide-open volume. The power curve reaches a maximum near the point of peak efficiency and then tends to drop off slightly with increased flow resulting in a non overloading design from the standpoint of motor sizing.  [c.105]

Propeller Fa.ns, Propeller fans may have from 2 to 6 blades mounted on a central shaft and revolving within a narrow mounting ting, either driven by belt drive or directiy coimected. The form of the blade ia commercial units varies from a basic airfoil to simple flat or curved plates of many shapes. The wheel hub is small ia diameter compared to the wheel. The blades may even be mounted to a spider frame or tube without any hub. The housiag surrounding the blades can range from a simple plate or flat ring to a streamlined or curved beU—mouth orifice.  [c.111]

The pin Brinell tester takes the form of a large C clamp with the baU indenter on the end of the screw. Load is controUed by a built-in shear pin. A modification of this device employs impact loading by a hammer to achieve similar results.  [c.464]

The taphole is built into the refractory lining of the blast furnace. The taphole drill is used to drill a hole through the taphole material. At the end of the cast, a mud gun is used to plug the hole with a quick-hardening clay. An alternative technique (hot bar) rehes on hardening the refractory around a metal bar, which is pulled out for tapping. Hot metal is tapped (cast) every three to five hours into refractory-lined railcars for transportation to nearby steelmaking faciUties or to a pigging machine. The largest blast furnaces have up to four tapholes which are used alternately as the trough and mnners are repaired. Slag is either transferred as a Hquid in inverted beU-shaped rail cars, or poured directly into a slag pit adjacent to the blast furnace. After solidification, the slag is cmshed and sized and sold for road ballast. In addition, the slag maybe granulated using a water spray to make a by-product  [c.419]

Two-BIa.de Coaters. In order to coat both sides of a web simultaneously, two flexible blade coaters can be used back-to-back, ie, with both blades pressing against each other and the web between them. The web usually travels vertically upward. Different coatings can be appHed on each side of the web. The blades tend to be thinner and more flexible than the standard blades and the angle to the web is lower. The web has to have sufficient tensile strength to be pulled through the nip.  [c.306]

Pests and Insecticides. The most destmctive pests of the cotton plant are the boU weevil and the boUworm/budworm complex. They are serious threats to the cotton industry in countries around the world. The boU weevil migrated from Mexico around 1892 and spread over the entire cotton belt within 30 years. The domestic cotton crop lost to the weevil is worth 200 million a year. In addition, about 75 million a year is spent for pesticides to control this destmctive pest (8). Unfortunately, some insecticides used to control the weevil kill many beneficial insects. Among the undesired casualties are insects that help to control the boUworm and the tobacco budworm, pests that cause another 200 million loss in cotton.  [c.309]

Industrial Waste Secondary Clarifiers Many plants which formerly discharged organic wastes to the sewer have turned to using their own treatment facihties in order to reduce municipal treatment plant charges. For organic wastes, the waste-ac tivated sludge process is a preferred approach, using an aeration basin for the bio-oxidation step and a secondary clarifier to produce a clear effluent and to concentrate the biomass for recycling to the basin. To produce an acceptable effluent and achieve sufficient concentration of the low-density solids that make up the biomass, certain design criteria must be followed. If pilot-plant data are unavailable, the design procedures proposed by Albertson (op. cit.) can be used to specify tank diameter, depth, feedwell dimensions, feed inlet configuration, and rake-blade design for a unit which will meet the specifications for many waste-activated sludge plants. Typical design parameters recommended by Albertson include the following  [c.1684]

In frames of the present work the problems of elemental analysis of human bio-substrates (blood semm, hair and bones) are diseussed. Sample pretreatment proeedures using ash and mineral aeids digestion were developed. The main sourees of systematie errors were studied and their elimination ways were suggested.  [c.226]

Forces generated by rotor motion. These forces can be classified into two categories (1) forces due to mechanical and material properties, and (2) forces caused by various loadings of the system. The forces from mechanical and material properties are unbalanced and are caused by a lack of homogeneity in materials, rotor bow, and elastic hysterisis of the rotor. The forces caused by loadings of the system are viscous and hydrodynamic forces in the rotor-bearing system, and various blade loading forces, which vary in the operational range of the unit.  [c.201]

Women of child-bearing potential, whose blood Pb exceeds 10 pg/dl are at risk of delivering a child with a blood Pb over the current Centres for Disease Control guidelines of 10 g/dl. If the blood Pb of such children remains elevated, they may be at increased risk of cognitive deficits. The blood Pb of these children should be closely monitored and appropriate steps should be taken to minimize the child s exposure to environmental lead. (CDC Preventing Lead Poisoning in Young Children, October 1991 see BEI and TLV documentation for lead.)  [c.89]

Born in Greenville, South Carolina, Charles Townes early in his life showed the characteristics of both a highly intelligent individual and a scientist. As a boy, Townes studied continuously, covering daunting subjects such as Greek, Latin, and Old English. Tie also read every issue of Popular Mechanics. Not limiting himself as a book scholar, however, Townes plunged into the hands-on work of technical subjects. Townes s father owned a shop that he rented to a clock and watch dealer. Townes reveled in disassembling the old, broken clocks. In high school, he took shop and mechanical drawing and developed a special interest in electricity and radio. He even attempted (unsuccessfully) to build his own ciystal radio.  [c.1141]

Figure 12-46F. Open radial blade impeller, Type R. (Used by permission Bui. Centrifugal Compressors Single Stage. A C Compressor Corporation.) Figure 12-46F. Open radial blade impeller, Type R. (Used by permission Bui. Centrifugal Compressors Single Stage. A C Compressor Corporation.)
World Class People Build World Class Motors, Bui. E-7, Lincoln Electric Co., May (1993).  [c.688]

Lorbeer, m, laurel, bay, -blatt, n, laurel leaf, bay leaf,  [c.280]

Not surprisingly, costs are several times higher than conventional wells. Nevertheless, overall project economics may favour ERD over other development options. For example, BP developed the offshore part of the Wytch Farm Oilfield (which is located under Poole Harbour in Dorset, UK) from an onshore location. The wells targeted the reservoir at a vertical depth of 1,500 meters with a lateral displacement of over 8,000 meters (Fig. 3.20). The alternative was to build a drilling location on an artificial island in Poole Bay. ERD probably saved a considerable amount of money and advanced first oil by several years.  [c.51]

Naphthalene from alcohol (crystallisation from an inflammable solvent). Weigh out 5 0 g. of commercial naphthalene into a 150 ml. conical or bolt-head flask. Add 25 ml. of rectified spirit (or of methylated spirit), 2-3 fragments of porous poreelain, and fit a reflux eondenser into the mouth of the flask by means of a sound cork (compare Fig. 11, 13, 7 the guard tube is not required here). Heat the mixture on a water or steam bath or in an air bath until the solvent boils. Add successive small volumes (each of 2-3 ml.) of the solvent, and boU gently after each addition, until the naphthalene has dissolved (apart from insoluble impurities). [If the solution is coloured, remove it from the bath, and when it has cooled somewhat, add 0 -2-0-3 g. of decolourising charcoal and shake thoroughly. Boil the mixture for several minutes.] FUter the hot solution through a fluted filter paper or through a hot water funnel (CAUTION all flames in the vicinity must be extinguished), and collect the filtrate in a conical flask or in a lipped beaker. Cover the receiver with a watch or clock glass, and cool it in cold water. Stir or shake the solution as cooling proceeds. After 30 minutes, filter off the crystals through a small Buchner funnel at the pump wash all the crystals into the funnel by rinsing the flask or beaker with some of the filtrate. Discontinue the suction and wash the crystals with two 5 ml. portions of rectified or methylated spirit. Continue the suction and press the crystals down firmly with a flat glass stopper. Dry the crystals on filter paper as in 7. When dry, determine the weight and also the m.p. of the purified naphthalene. Pure naphthalene has m.p. 80°.  [c.233]

Place 84 g. of iron filings and 340 ml. of water in a 1 - 5 or 2-litre bolt-head flask equipped with a mechanical stirrer. Heat the mixture to boiling, stir mechanically, and add the sodium m-nitrobenzenesulphonate in small portions during 1 hour. After each addition the mixture foams extensively a wet cloth should be applied to the neck of the flask if the mixture tends to froth over the sides. Replace from time to time the water which has evaporated so that the volume is approximately constant. When all the sodium salt has been introduced, boU the mixture for 20 minutes. Place a small drop of the suspension upon filter paper and observe the colour of the spot it should be a pale brown but not deep brown or deep yellow. If it is not appreciably coloured, add anhydrous sodium carbonate cautiously, stirring the mixture, until red litmus paper is turned blue and a test drop upon filter paper is not blackened by sodium sulphide solution. Filter at the pump and wash well with hot water. Concentrate the filtrate to about 200 ml., acidify with concentrated hydrochloric acid to Congo red, and allow to cool. Filter off the metanilic acid and dry upon filter paper. A further small quantity may be obtained by concentrating the mother liquid. The yield is 55 g.  [c.589]

Prospects. Despite the slow development of renewable biomass as a primary source of energy, the large research effort in progress on feedstock production and conversion is expected to lead to greater commerciali2ation of advanced energy and organic chemical processes based on biomass. Small-scale systems for the individual farmer are being designed and marketed to make it possible to install and operate complete on-site total energy packages that will supply all of the farm s energy requirements. These systems will be fueled with captive sources of biomass and wastes generated on the farm. It is likely that large building complexes such as schools, apartments, shopping malls, and theme parks in urban areas will be able to incorporate similar systems using captive wastes and deUvered biomass. Individual, small-scale, farmers cooperative and industrial-scale fuel ethanol plants will continue to be built and operated as long as government tax incentives are provided. Tax subsidies for fuel ethanol are expected to become uimecessary as the technologies for use of low grade lignoceUulosic feedstocks for fuel ethanol are perfected. New, larger scale, biomass-fueled and waste-to-energy power plants, especially those that incorporate cogeneration, will continue to show modest growth as the technology advances and the disposal of waste biomass in an environmentally acceptable manner is implemented. The development of improved methane fermentation processes for waste biomass such as municipal bio-soHds, industrial wastes from food-processing and beverage alcohol plants, and refuse-derived fuel, is expected to result in more efficient waste treatment and disposal and increased methane recovery and utili2ation.  [c.48]

AT T BeU Laboratories has built RightPages, a prototype electronic Hbrary, as a current awareness alerting tool. This pilot project illustrates many of the copyright problems encountered in the use of advanced technologies. Identified issues include time and cost involved in securing permissions from individual pubHshers, pricing issues, complexity of licensing agreements and the restrictions they impose, and adrninistrative costs incurred in obtaining and managing all such licensing agreements (12).  [c.113]

Microscopy as a field follows only astronomy in the history of science and technology. SteUuti in 1630 pubUshed the oldest known microscopical observations which were on the microstmcture of the bee and the weevil. The compound microscope (based on a two-lens, two-step magnification by objective and ocular) was proposed by Zacharias Jansen in 1590. However, because of spherical and chromatic aberrations and other faults of the compound microscope, most microscopists preferred the simple microscope, ie, a one-lens magnifying glass, for the next 200 years. Even so, Antoni van Leeuwenhoek (1632—1723) in the late seventeenth and early eighteenth centuries developed simple lenses capable of magnifications nearly as high as 300x. The resolution was adequate for the detection and identification of blood cells, spermatozoa, and even bacteria, all reported by Leeuwenhoek in a long succession of letters to the Royal Society in London. Robert Hooke (1635—1703) made similar studies in England, principally on biological materials.  [c.328]

The next faciUty in the evolution of the BWR was the experimental boiling water reactor (EBWR), built at Argonne National Laboratory (51). This reactor went critical in 1956 and eventually reached a power of 100 MWt. Operating at a power twice that of BORAX, it was more stable. Another BWR having still higher pressure, the VaHecitos boiling water reactor (VBWR), was operated in California by General Electric Company. A succession of central station power reactors appeared 200 MWe Dresden (Tllinois) in 1960, 63 MWe Humboldt Bay (California) in 1963, and 610 MWe Oyster Creek (New Jersey) in 1969.  [c.218]

Table 4 shows the size of CPI and of its 12 sections. The aimual input has more than doubled over the span of 20 years, and shifts in activity are evident. Thus Section L accounted for just over 11% of CPI references in 1973 but over 26% in 1993 Section D grew from 10 to 16%, and Section G from 6.6 to 11.5%. The largest relative declines occurred in Sections E and E, while Section A, the largest of all chemical sections, remained relatively constant at about 33% of the CPI. The sectional breakdown of CPI has been important for the marketing of the service. The cost of purchasing coverage for all technologies is substantial, and few organizations have interests sufftcientiy broad to buy the complete service. By packaging the product in segments, Derwent has been able to build up a worldwide cHentele. As of 1995, however, Derwent is engaged in reconsideration of its pricing and marketing practices. It is highly likely that shifts away from prices based on section groupings will take place, particularly when Sections K and L have been priced as if they were the same size.  [c.52]

Trans-Alaska Pipeline. The design and constmction of the Trans-Alaska Pipeline was one of the most difficult and ambitious pipeline projects ever attempted. Its 1316-km length extends from the producing fields at Pmdhoe Bay across three mountain ranges, where up to 12 m of winter snow and wind chills of —73° C can be expected, to the Valde2 Marine Terminal on the southern coast of Alaska. Thirteen bridges were built to carry the pipeline across rivers and difficult terrain. To avoid localized melting of the permafrost by the 32—49°C cmde oil and possible instabiHty of the soil, a significant portion of the pipeline was installed above ground, supported by 78,000 vertical support members embedded in permafrost to depths ranging from 4.5 to 18 m. The pipeline is insulated and jacketed to reduce heat losses, and passive refrigeration is used to keep the soil frozen around the vertical support members which can move up or down, thus allowing a 0.6-m vertical movement of the pipeline. The pipeline is laid out in a zigzag fashion to allow a 3.6-m horizontal movement for pipe expansion and contraction and possible seismic disturbances. The buried portion of the pipeline is 611 -km  [c.47]

Although a BINSERT blender often requites more recinculation to achieve an acceptable blend than a multitube blender, it has a number of potential advantages including ease of cleaning siace all of the internal parts ate exposed and accessible blending cohesive, ie, nonfree-flowing materials siace the outlet can be sized as large as necessary for flow blending materials with high angles of internal friction and materials which ate highly segregating, eg, containing a wide range of particle sizes low headroom requirements siace the walls of the outer hopper can be made relatively shallow no mechanical moving parts other than perhaps a feeder, eg, belt, screw, or rotary valve used at the outlet to control the discharge rate, and a recinculation system and it can often be retrofitted to an existing storage bia causiag it to act as an ia-bia blender.  [c.562]

Foster-Wheeler has two pyrolysis plants operating in Germany other European countries and Japan also pyrolyze scrap mbber. Tyrolysis built a 122 t/d pyrolysis plant in the United Kingdom (24), employing vertical cross-bow reactors (25). Intennco (Houston, Texas) shut down a 40 t/d scrap tire pilot plant. In the Intennco process, the shredded tires were pyrolyzed by two reactors in series by indirect heat at ca 540°C in a reducing atmosphere. The process yielded ca 0.5 m (3 bbl) of aromatic (30—40% light) oil per ton of scrap mbber. Contaminants in the pyrolytic char were removed by several proprietary processing steps (26). In the United States, tire pyrolysis has been studied as a method for recovering pyrolytic tiller however, production of virgin carbon black from petroleum oils is less expensive, easier to control, and gives better quaUty.  [c.14]

Ultrasonic mills produce dispersions by causing the slurry to impinge against a stainless steel blade at high velocity. These mills are fast and effective but have a disadvantage of being easUy shut down by coarse slurry particles or large particles of foreign matter. An attrition mill functions by means of a reciprocating paddle, which violentiy agitates a mixture of the slurry, and a grinding medium usuaUy consisting of pebbles. A pump also accelerates grinding by circulating the slurry. As with mechanically osciUated fixed baU mills, attrition mills rapidly produce high concentrations of fine particles.  [c.257]

The KRW (Kellogg-Rust-Westinghouse) gasification process uses an agglomerating-ash fluidized-bea gasifier in which crushed hme-stone can be injected with the coal for sulfur capture. The Pinon Pine 100-MW IGCC plant built near Reno, Nevada, uses the KRW gasifier. This IGCC plant, scheduled to begin commercial operation in 1997, is being built with U.S. DOE sponsorship under the Clean Coal Technology Program.  [c.2371]

The fact that after a storm or the passage of a frontal system the air becomes crystal clear and one can see for many kilometers does not give a true measure of year-round visibility under unpolluted conditions. Between storms, even in unpolluted air, natural sources build up enough particulate matter in the air so that on many days of the year there is less than ideal visibility. In many parts of the world, mountains are called "Smoky or "Blue" or some other name to designate the prevalence of a natural haze, which gives them a smoky or bluish color and impedes visibility. When the Spanish first explored the area that is now Los Angeles, California, they gave it the name "Bay of the Smokes." The Los Angeles definition of air quality before the advent of smog was that "You could see Catalina Island on a clear day." The part of the definition that is lacking is some indication of how many clear days there were before the advent of smog.  [c.375]

Shock in rotor losses. This loss is due to shock occurring at the rotor inlet. The inlet of the rotor blades should be wedgelike to sustain a weak oblique shock, and then gradually expanded to the blade thickness to avoid another shock. If the blades are blunt, a bow shock will result, causing the flow to detach from the blade wall and the loss to be higher.  [c.250]

After the estimates are made, process design has taken shape, and the funds to build the plant are authorized, it s time to buy the equipment. To the uninitiated, the task can appear quite formidable. Even to the veteran, the chore is great with a multitude of details to remember. Note, the title of the chapter is not how to, because that is left to each engineer and his client or company to decide. What will be presented here can be more nearly described as a checklist and outline to help the purchaser recall all the details and avoid as many surprises as possible.  [c.438]

The understanding of the fundamentals of solidification is primarily the creation of Bruce Chalmers and his research school, first at Toronto University and from 1953 at Harvard. As it happens, I have an inside view of how this research came about. In 1947-1948, Chalmers (1907-1990 an English physicist turned metallurgist who had taken his doctorate with an eminent grower and exploiter of metal crystals, Neville Andrade in London) was head of metallurgy at the recently established Atomic Energy Research Establishment in Harwell, England, where I was a new boy . In his tiny office he built a simple meccano contraption with which he studied the freezing of tin crystals, a conveniently low-melting metal, whenever he had a spare moment from his administrative duties. (I recall exploiting this obsession of his by getting him to sign, without even glancing at it, a purchase order for some hardware I needed.) He would suddenly decant the residual melt from a partly frozen crystal and examine what had been the solid/liquid interface. Its appearance was typically as shown in Figure 9.1 - a cellular pattern - and when at his request I prepared an etched section from just behind the interface, its appearance was similar this suggested that impurities might be concentrated at the cell boundaries. He was determined to get a proper understanding of what was going on, for which he needed more help, and so in 1948 he accepted an invitation to join the University of Toronto in Canada. Two famous papers in 1953 (Rutter and Chalmers 1953, Tiller ct al. 1953) established what was happening. The second of these papers appeared in the first volume of Aeta Metallurgical a new journal of fundamental metallurgy which Chalmers himself had helped to create and was to edit for many years (see Section 14.3.2).  [c.344]

Biological monitoring has several other limitations, in addition to those presented above. Biological monitoring is not suitable for agents which do not need to enter blood, such as irritating gases and many dusts. Neither is it very useful for substances with high acute toxicity (in fact occupational hygiene surveys are not very practical in such cases, but the working area should be provided with some kind of continuous monitoring equipped with an automatic alarm system). Another limitation is the small number of compounds for which there are biological exposure limits or indices (BEl) compared to those for occupational exposure limits (only ca. 10%). However, it should be noted that biological monitoring of exposure to a certain agent is often Useful even if no BEI has been established for it. Biological monitoring is especially beneficial for substances with significant skin penetration. Urine sampling may well represent the most convenient means for exposure trend analysis. Blood sampling may be slightly more difficult due to the analytical procedures and unpleasantness of blood sampling. The main limitation is, however, that biological monitoring as such does not provide any information on the causes of exposure. New technologies have become available in which cell samples can be collected, e.g., from the oral cavity, and possible protein or DNA adducts (reaction products between a reactive compound and proteins or DNA) can be quantitated, e.g., with high-pressure-liquid-chromatography. Examples of such compounds are formaldehyde and isocyanates.  [c.325]

Advantages of the biological gas purification include low operating temperatures and the possibility of treating gas streams with low organic loads. Due to the low operating costs, bio-filtration can provide significant advantages over other air pollution technologies when the waste gases contain low concentrations of readily biodegradable and water-soluble compounds. Biotreatment is not recommended for gases containing organic sulfur compounds. - It is essential that dust, oil, and grease are removed from the waste gas stream before they enter the biological treatment zone.- (see Table 13.15) Biofilters are used for the control of organic compounds, air toxics, and organic and inorganic odors. Most biofilters are built as open singlebed systems, the most common filter media being compost and soil. In biofiltration, effluent gases are vented through a biologically active material, and with sufficient residence time, the contaminants diffuse into a wet, biologically active layer (biofilm) that surrounds the filter particles. Aerobic degradation of pollutants occurs while the microorganisms metabolize them. The system consists of an effluent gas blower, a gas humidifier,  [c.1264]

In contrast to the passive protective nature of some structural proteins, another group can be more aptly classified as protective or exploitive proteins because of their biologically active role in cell defense, protection, or exploitation. Prominent among the protective proteins are the immunoglobulins or antibodies produced by the lymphocytes of vertebrates. Antibodies have the remarkable ability to ignore molecules that are an intrinsic part of the host organism, yet they can specifically recognize and neutralize foreign molecules resulting from the invasion of the organism by bacteria, viruses, or other infectious agents. Another group of protective proteins is the blood-clotting proteins, thrombin and fibrinogen, which prevent the loss of blood when the circulatory system is damaged. Arctic and Antarctic fishes have antifreeze proteins to protect their blood against freezing in the below-zero temperatures of high-latitude seas. In addition, various proteins serve defensive or exploitive roles for organisms, including the lytic and neurotoxic proteins of snake and bee venoms and toxic plant proteins, such as riein, whose apparent purpose is to thwart predation by herbivores. Another class of exploitive proteins includes the toxins produced by bacteria, such as diphtheria toxin and cholera toxin.  [c.125]

Insects use an open circulatory system to circulate hemolymph (insect blood). The blood sugar is not glucose but rather trehalose, an unusual, nonreducing disaccharide (see Figure). Trehalose is found typically in organisms that are naturally subject to temperature variations and other environmental stresses— bacterial spores, fungi, yeast, and many insects. (Interestingly, honeybees do not have trehalose in their hemolymph, perhaps because they practice a colonial, rather than solitary, lifestyle. Bee colonies maintain a rather constant temperature of 18°C, protecting the residents from large temperature changes.)  [c.223]

Tabak, m. tobacco, -asche, /. tobacco ashes, auszug, m. tobacco extract, -bau, m. tobacco cultivation, -beize, /. sauce (for tobacco). -blatt, n. tobacco leaf, tabakbraun, a. tobacco-brown.  [c.439]

Figure 10-182. Fan blade guard mounted directly below blades. Note that drive shaft connects through the opening. (Used by permission Bui. 107. SMITHCO Engineering, Inc.) Figure 10-182. Fan blade guard mounted directly below blades. Note that drive shaft connects through the opening. (Used by permission Bui. 107. SMITHCO Engineering, Inc.)
Figure 12-120D. Fan assembly with double-width wheel, inlet vane dampers, and belt drive with guard. (Used by permission Bui. 141, 1995. The New York Blower Co. For more information, contact the company at www.nyb.com.) Figure 12-120D. Fan assembly with double-width wheel, inlet vane dampers, and belt drive with guard. (Used by permission Bui. 141, 1995. The New York Blower Co. For more information, contact the company at www.nyb.com.)
Figure 12-123B-2. Wear strip construction on induced draft fan for dirty gases. The inertia of suspended dust particles carries them toward the backplate or centerplate where the wear plate withstands the abrasion normally affecting the blade. (Used by permission Bui. 2-5100. The Howden Fan Co.) Figure 12-123B-2. Wear strip construction on induced draft fan for dirty gases. The inertia of suspended dust particles carries them toward the backplate or centerplate where the wear plate withstands the abrasion normally affecting the blade. (Used by permission Bui. 2-5100. The Howden Fan Co.)
Figure 12-152. Multiwheel blower built in many aspects similarly to a centrifugal compressor—top inlet and top discharge, range to 24,000 cfm, 17 psig discharge, or 16 in. Hg. vacuum. (Used by permission Bui. 101-2-2, 9/92. Lamson Corp.) Figure 12-152. Multiwheel blower built in many aspects similarly to a centrifugal compressor—top inlet and top discharge, range to 24,000 cfm, 17 psig discharge, or 16 in. Hg. vacuum. (Used by permission Bui. 101-2-2, 9/92. Lamson Corp.)

See pages that mention the term Buys Ballot s law : [c.61]    [c.135]    [c.342]    [c.239]    [c.456]    [c.97]    [c.55]    [c.257]    [c.439]    [c.543]   
Fundamentals of air pollution (1994) -- [ c.259 ]