. Railway mechanical engineer . te units are forced down into the coal pile to definitedepths and at various points, and collectively furnish definitedata to the consumer as to the exact temperatures existingbeneath the surface. If an accurate record of daily readingsof these instruments is kept, the slightest rise in temperatureis at once detected, and should it become excessive, the con-sumer can remove this particular portion of fuel, thus savingthe greater part of the heating value of the coal which hasstarted to dissipate. Tests have shown that an installation of one coalometer
. Railway mechanical engineer . te units are forced down into the coal pile to definitedepths and at various points, and collectively furnish definitedata to the consumer as to the exact temperatures existingbeneath the surface. If an accurate record of daily readingsof these instruments is kept, the slightest rise in temperatureis at once detected, and should it become excessive, the con-sumer can remove this particular portion of fuel, thus savingthe greater part of the heating value of the coal which hasstarted to dissipate. Tests have shown that an installation of one coalometereach 50 ft. in both directions from its neighbor will efficientlyindicate conditions of temperature below the surface. Thusthe installation of one triple unit will protect approximately900 tons of coal if the volume is about 50 ft. by 50 ft. by16 ft. A triple unit coalometer for use in coal piles from 15 ft. to20 ft. deep is shown in Fig. 1. A galvanized steel tube, hav-ing a hardened steel diamond point drill at its lower end,. Fig. 2—Typical Installation of Coalometer carries three pressure bulbs at depths of 5, 10 and 15 ft.,respectively. Tubes from these three bulbs register tempera-tures in deg. F. on three dials, by means of pointers pro-vided for that purpose. The scale on each dial starts at 32deg. F., and is colored black. At and above 120 deg. thescale is red, indicating excessive heat at a point in this zone,,and warning the coal man to remove this portion of the depth of the hot spot is determined at a glance, for thedials are plainly marked 5 ft., 10 ft. and 15 ft., dial showing the hottest temperature thus indicates thedepth at which the heat is generating. The dials are enclosed in weathertight metal .. ases withthick crystal faces, and the set is again enclosed in a gal-vanized cast iron case. This furnishes ample protectionwhen not in use, and added protection when in service. Aslidable pipe wrench is provided on each unit to aid the
Size: 2593px × 964px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
