. The street railway review . he best or for tin-poorest engine. The following table shows these various quanti-ties computed for the diflferent classes of engines. The last col-umn in the table shows the sum of fuel costs and fixed charges andis one which may be taken to represent the proportional yearlycost of each class of engine. By a study of the results in ihe latter cnlnmn some interestingconclusions may be deduced. First, as to the saving due to condensing water; we have onlytwo results which can be compared to show the value of the con-denser; these results are the cost of the compoun
. The street railway review . he best or for tin-poorest engine. The following table shows these various quanti-ties computed for the diflferent classes of engines. The last col-umn in the table shows the sum of fuel costs and fixed charges andis one which may be taken to represent the proportional yearlycost of each class of engine. By a study of the results in ihe latter cnlnmn some interestingconclusions may be deduced. First, as to the saving due to condensing water; we have onlytwo results which can be compared to show the value of the con-denser; these results are the cost of the compound slide valvenon-condensing compared with the average value for the compoundslide valve condensing. The results are respectively, $ and$; the saving due to condenser is $ which is per centof the cost of running a non-condensing and per cent of thecost of running a condensing engine. The saving woidd seem tobe nearly 20 per cent and. for reasons which have been alreadymentioned, would probably be STREET RAILWAY LOAD CURVE. Second, the average yearly cost of engines of the compound con-densing type with the Corliss, Mcintosh and Seymour, or Greenevalve gear as compared with the simple slide valve engines, showa yearly saving of $ per h. p. The difference in costs of the power plant considered is $ is the excess in cost of the compound condensing corlisstype over the simple slide valve non-condensing. The saving infuel and fixed charges is thus seen to be sufficient in a single yearto pay times the difference in cost between the cheapest andbest power plant. Comparing in the same way the average yearlycosts of fuel and fixed charges for the compound slide valve con-densing engine and the compound corliss condensing type, we finda yearly saving of in favor of the better grade of engine. Thedifference in costs of the two plants is in favor of the compoundcondensing slide valve engine. Thus, in a single year the saving ont
Size: 1394px × 1792px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
