. Railway age gazette . r 5° T- .• > / ,y 0^ ^ ^ / : Lt *eT « a. y y y^ ^y ^ ^ 100 A ^ 1^ ^ ^ ^ /^ /■ y _^^ —a T > y> -* -^ y LCH 6TH - y 50 ^ r^ ,^ *o(r ni \im,i f 4^ -J 25000 30000 35000 40000 45000 50000 55000EVAPORATION, POUNDS PER HOUR Fig. 3—Superheat and Evaporation The superheat increases with an increase in evaporation up to 50,000 hour. Above this evaporation there appears to be a falling off insuperheat, probably due to the heavy fire that must be carried, and thefact that all of the coal fired is not being burned. them. These dummy pipes were used with this single-p
. Railway age gazette . r 5° T- .• > / ,y 0^ ^ ^ / : Lt *eT « a. y y y^ ^y ^ ^ 100 A ^ 1^ ^ ^ ^ /^ /■ y _^^ —a T > y> -* -^ y LCH 6TH - y 50 ^ r^ ,^ *o(r ni \im,i f 4^ -J 25000 30000 35000 40000 45000 50000 55000EVAPORATION, POUNDS PER HOUR Fig. 3—Superheat and Evaporation The superheat increases with an increase in evaporation up to 50,000 hour. Above this evaporation there appears to be a falling off insuperheat, probably due to the heavy fire that must be carried, and thefact that all of the coal fired is not being burned. them. These dummy pipes were used with this single-passsuperheater to make the gas passage around the elements thesame as with the standard arrangement. In Fig. 2, G is ar- May, 1914 RAILWAY AGE GAZETTE, MECHANICAL EDITION 231 ranged in the same way as the standard, except that it is 17in. longer for both passes, whereas /, K and L are similar tothe standard arrangement //, excepting the return portionwhich has a length one-quarter, one-half, and three-quarters. 25 30 35 40 CUT-OFF IN PER CENT. OF STROKE Fig. 4—Superheat and Cut-off The superheat increases with the cut-off up to 45 per cent: beyond45 per cent there is a falling off in superheat. that of the corresponding part of the standard superheater. In addition to the foregoing, the superheater of the three-quarter length arrangement of double-pass superheater hadtwisted plates inserted in the tubes of the superheater elements. \ \ 0 V k \ \ 250 A s \ ^i- \ \ A \ \ s \ Fr S0( tR< EN \ s \ \ \, s. ^ \ ^ kf ■^ s N ^ Ss SO >s N •^ ^ p-i k s. L^ ■-<s \ ^15 0 PER INDICATED HORSE-POWER HOUR. Fig. 5—Cut-off and Steam per Indicated Horse Power the object being to cause a whirling motion of the steam sothat its heat-absorbing action might be improved. One locomotive was used for all of the superheater tests;it was a class K2sa Pacific type pa
Size: 1523px × 1642px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroa, bookyear1913
