Document kmwVGxvLkkVQjM70VezL83w0n

NICHOLSON TRAPS SAVE CAR OF COAL WEEKLY ioi This Large Steam User Following replacement of oil stoam traps of various makes, with Nicholson units, on Eastern college reports;--"An averoge coal saving of 1 carload per week besides much better hoot distribution". Credit It given the higher and more even temperatures which Nicholson traps effect. See why large industrial and Institutional steom users are Increasingly stand* ardizing on Nicholsons. 5 types; for hoot, power, process; sizes li" to 2"; pressures to 250 lbs. [NICHOLSONl .TRAPS VALVES 2 r L0ATS tu More technical briefs^. All Boilers at Moss Landing Steam Plant .02. They ore fleniblc u,,, ... tow application, that V,'.*'' died by them. *W 3. Their high pertorraonco molreo them on ido.1 drl.e lor^S'' OUJ industrlol proeeua. 1 4. Their hi(h epeed el remeiu. .hem WUbte (or hi,h.,S*"^ luring methods. 5. Their wide range of .Mcd ,nH horeepower eovere me,, lede.lrio) need, 6. Their overall efficiency I. ,, nr better than other drives. * 7. Beceote el .he absence el rolelln,' inechinery they require little m,lolt nance. A. Due to their flexibility and adapt, ability they can be used on mow lppu. cations at moderate coat. Those features of the electronic packaged drives put them in good poiJ. tion when compared with others. In general it has been found that the use y of an electronic drive increases, the j processing speed and improves the mao. ufactured produet. AIEB conference paper. Can be obtained from the tttfta. of the Pacific Gas and Electric Company equipped with Ohetthet tm Wcrlne pepen m p 114 Potkoged-Orive Design Problsmi. By, S // Vtdder, JFtstinghatue Eltdrit Carp, Buffalo, N. Y. *. The trend toward packaged adjnsi.. able-ipeed drives Is increasing because of the many advantages they offer to machine builders and users. A pack* aged drive is easier to install because the many parts previously shipped sep arately are now foetory assembled la s metal cabinet and tested. Drives that usd motor-generator seta for power cos- version in ratings up to 300 bp ara considered in this paper. Ratings of these drives follow the same steps as do motors. Only seven sixes of cabinets are required to package drives of 1 to 200 hp. However, the control function* which must be provided for are stag* gerlng, For example, about 1000 ddv< designs are needed to cover rating* bihe country's largest single utility expansion program, noting more than one billion dollors, Pacific Oos and Elooftrfc Company Is boosting its power capacity by more than 1500,000 kilowatts- One of the five steam power plants In Ha program is P. G. and E.'* Moss Landing Steam Plant, boiler (illustrated), designed to generate 850,000 lb of steam per hr ot I4S0 psi and 1000 F, reheated to 1000 F. Each of the boilers et Moss Lending has been designed to incorporate a Ljungstrom Air Preheater. Those now In use preheat incoming air to 575 F, and cool exit gases to 350 F. from l to 30 hp. 230, 460 and 575 *. designed and constructed by Stone IS Webster Engineering Ljungstroras will be used also for the boilers being built 60 cycles. . Ctfporotion, under the supervisioa of the P. G. and E. Engl- Moss Lending is another in a long series of new stations A few simple principles should o* followed In applying and deima* packaged drives. Tbeeo are: 1. Pockaging Is not a necessity- l* less there la an ove.nl) advantage ts the purchaser the drive should not packaged. ^ 2. Engineering design cost,cn ,l-0 higher on complex packaged drives t . tyring Deportment Three of o projected five i00,000-kw turbines are in oper- >tion now at Moss Landing. Steam for each of these throe bbtoet is supplied by two 475,000 pounds of steam per kbr Babcock fr Wilcox Radiant Boilers with superheater Wist conditions of 1405 psi and 950 K. The two turbines 1*1 to bo installed will each be powered by one BhW reheat and expansions to existing stations where Ljungstrom Air Preheaters have been specified for high-performance steam generating units. The unanimity with which the Ljungstrom has been accepted by boiter manufacturers, consulting engi neers, and power companies is demonstrated by the fact that over 285,000,000 pounds per hour of steam capacity since 194$ has been served by Ljungstrom Air Preheaters. on non-pnekoged equipment. 3. Drive designers must not w Air Preheater Corporation dicapped by the purchaser Inslstinl . a specific solution to a problem w ihe tail 42nd St., New York XJ, M.Y. POWCI tUHt **? {own 1 KV.