. Electric railway journal . asement. One Deane feed pump used with the formerstation equipment is held in reserve, and a Deane firepump is in service, the latter being piped for feed-pump work in emergencies. Water taken from the hotwell at 100 deg. Fahr. passes through a feed pump intoa 2500-hp. National closed heater, through which steamfrom the auxiliaries is passed. Leaving the heater at205-210 deg. Fahr., the water temperature is then raisedto 270 deg. Fahr. in the economizer, thence entering theboilers. A 5-in. Venturi meter, with extra 2-in. throatto measure feed water during the night
. Electric railway journal . asement. One Deane feed pump used with the formerstation equipment is held in reserve, and a Deane firepump is in service, the latter being piped for feed-pump work in emergencies. Water taken from the hotwell at 100 deg. Fahr. passes through a feed pump intoa 2500-hp. National closed heater, through which steamfrom the auxiliaries is passed. Leaving the heater at205-210 deg. Fahr., the water temperature is then raisedto 270 deg. Fahr. in the economizer, thence entering theboilers. A 5-in. Venturi meter, with extra 2-in. throatto measure feed water during the night when the loadis very light, is installed in the feed water main piping,with dials and recording mechanism in the office of thechief engineer, C. L. Sheldon. Without the mechanical stoker installation it wouldbe necessary in this plant to operate three or fourboilers, whereas with the present installation two boilersare sufficient for all the steam requirements. About 25tons of bituminous coal are burned per day in the plant. HOLYOKE POWER PLANT—ENGINE ROOM IN RECONSTRUCTEDPLANT Ashes are at present dumped from the grates upon aconcrete shelf in the boiler-room basement. A passage-way is provided at one side of this shelf and equippedwith a narrow-gage track upon which ash cars can beoperated later to a hoist for yard delivery. About 12per cent ash is obtained in the present fuel combustion,all ashes being weighed. From Boiler to Hot Well or Switchboard At the rear of the boilers and about their settingsare carried two live steam headers, one 10 in. in diam-eter for prime movers and a 5-in. auxiliary line. Thetwo headers are cross-connected at various points, andthe steam delivery lines from the boilers are 6 in. indiameter in the cases of the new units and 5 in. indiameter in the older installation. Short connectionswith a gate valve in each are carried through a fire wallbetween boiler and engine rooms through separators tothe corresponding engines, with the customary expan
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