Document G64vR7979KRq0N4Qod5EnQ3Xx

Mire TECHNICAL CHIEFS. of over 4-million acre-feet capacity. There are two identical power houaaa, one In the U S. end the other in Maiico. Each designed for four 14,750-hp 163.6-rpm vertical-shaft Francis tur bines driving 11,667-kva 6,900-v, 60cycle 0.90-pf generators, of which thr'eo are being, installed in each plant, it Is especied that -power generation of the two plants will average about 250,000,000 kwhr annually. Practically the only difference in the two plants it In the arrangement of the Intake works and penstocks. Cenerators In both plants will be connected to oper ate on a unit system. Each generator will connect to a 6.9 to 136-kv step-up transformer that in turn connects through an oil circuit breaker to the 13A-kv bus. The high-tension switchyord is on the roof of each plonl and has a main and transfer bus, with the usual complement of `rUsconnect switches, current and poienkhl trans formers. Estimated cost of the dam and two power plants is 149,205,000 deluding certain items borne separately by each government within its own territory, such as the acquisition of lands, reloca tion of highways and utilities, construc tion camps and acceda, roads. It is ex pected that the plants will be ready for operation about April l, 1954. APC Paper, no number. An Evaluation of Our Water Sources. By A M BtuwtU, Chief, Illinois Slate Voter Survey. This paper reviews the possibilities of increasing our available water sup ply with particular reference to the State of Illinois. The author's conclu sions are: (1) present water consump tion is rapidly exceeding the capacity of developed supplies in many localities, (2) demands for water are increasing at rates which may reach the limit of our ultimate resources in the not loo distant future unless new methods for water development and use are worked out, (3) present methods of evaluating our water resources are very inadequate .and inaccurate. This is o sentiment widely expressed by today's water ex perts. In view of tha obvious need for more complete information on our develop able water resources, the Illinois State Water Survey aided by representatives of the States of Indiana, New Jersey and Ohio, undertook in 1951 water resource studies. Examining the Federal side of the picture it is interesting that the fed eral water programs over the nation cost 913,200,000 in 1949. This was divided: Weather Bureau $4,800,000, Geological Survey $8,380,000, transferred from other interested agencies $4,740,000. oreos and (ho een,ion o( . .ponding limitation, i, Ih. ,, day s progress. 1 01 The need for increased interest by public egenoies in water resource work is clearly called for. A greatly increased Thn rotor. of largo (a,bl,,, (ora, lor taomple, ara now mode ol .olid alloy ueel loral'A! t?" program is amply justified when we con sider that our developed water sup plies are valued at $7,300,000,000 per year while the amount epeni on collect ing information on this resource is only $14,000,000 or less than 0.2 of one per cent. New techniques developed to solve our water problems include: ground* water recharge, redor and statistical analysis. APC Paper, no num6er. orlgiool development ol .ha. , neceulty emphoaued the phylical"h,, ctemlica ot the lorglnga ebon .U e " it is alway. oiae,,,|,| " high physical strength ealit the rotor. Thia we. dene with thTum ol alloying elements, principally nickeL with wmo addition! el chromium, molybdenum, and occasionally dium, and an elaborate hest treatment. Electric Generators These elements are generally detrimen tal to obtaining a high intrinsic muui. tlon limit in a forging and often caused Dwign and Application of torso Steam considerable variation in the magnetic Turbino Driven Generators. By C E characteristics ol different rotors. Coe. Kilbourne and J B McClure, Generol sequenily, they tended to limit the (lvi Electric Co. carrying ability of the rotors.' Progress In the an of generator de After the problems of physical char- sign depends fundamentally on the ex acteristid had been solved, an exten tension or removal of one.or more of sive investigation was carried on to im the basic physical limitations which prove both the magnetic limit and tbs determine how these machines can be uniformity of magnetic characteristics. satisfactorily built. The problems In It was found that a careful control oi volved cover a number of areas of en * the carbon and chromium content, phi gineering including, basically: magnet a revised heat treatment, would not sol; ics--how to csrry more flux; electricity provide just as good physical properties --how to conduct current better; di as had been obtained earlier, but site electrics--how to contain voltage better; would improve both the flux carrying fluid flow and thermal dissipation--how ability and the magnetic uniformity el to convey heat; end mechanics--the the rotors. The results have been ex construction features to enable the cellent. Cases of high excitation require proper performance of the preceding ments, which occasionally occurred (unctions. Technical advances have re earlier, have been eliminated oed tbs- cently been made in several of these magnetic loadings of the rotors bsvo been increased. A similar development has taken plate' TO OBTAIN COMPLETE TEXT Material far theta abstract comet from the following sources unless otherwise stated. Order comp/ere paper from source, not Power. American Institute of electrical Engineers, winter general meet ing, Statler Hotel, New York, N. Y. Jan 19-23, 1953. Identified by initials AIRE and obtainable through AIEE, 33 KP 39th St, New York 18, N. Y. American Power Conference, annual meeting, Sherman Hotel, Chicago, IIIMarch 24-27, 1953. Identified by initials APC and ob tainable In proceedings printed and distributed by R A Budenhotser, chairman, Illinois Institute of Technology, 3300 Federal St, Chicago 16,1U. 16.00. for the magnetic porta of the armature In this case, oriented-grain strip steel has replaced non-oriented sheet steel This is advantageous for turbine geoerotors because the large, beovy core sections, back of the armature teeth, con be materially benefited by the new material. The loos In this part, which Is one of the major losses in the ma chine, eon be reduced to between 65% to 75% of Its previous amount, or row* flux may bo carried with the same lo or a compromise between loss reduction and flux carrying ability may be owe. Thus the mogneilc ports of the aim** lures can be mode smaller than U>T have been before, or, conversely, u same shed parts eon be msde to pt* duce a greater output. The ability to get more out oi given sise machine is perhaps a101* spectacular than a decrease In dta** slons of machines that have sires 1 (Confirmed on page 200) Whatever your fuel needs, we have a coal that is ^y>/ the In fact, you can write your own ticket--for the vast Bituminous fields served by the Balti more & Ohio contain excellent coals In wide variety. For centuries to come, these cools will be available--a dependable source of low-cost heal and energy. Modern mechanization at the mines as sures low costs as well as uniform size and quality. 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