basis, in determining the coal used per indicated horse-power per hour in the large engine.' TABLE 1A Experiments on the "Duplex" Gas Producer using Steam Coal as Fuel, and Fan-blast Date of trial. Time of trial Duration of trial Condition of weather GAS VOLUME TEST Average temperature of outside air Average temperature of gas when entering holder Pressure of gas in holder, in inches of water Average pressure of crude gas in producer delivery-pipe, in inches Density of steam coal used per cubic foot, in lbs. Weight of steam coal per inch depth of both cupolas, in lbs. 1.5 47.18 13.88 34.020 4,252.5 54.04 April 2, 1895 Time of trial Scale of indicator spring 80 Maximum possible explosions per minute. Average mean pressure, neglecting pumping stroke, in lbs. Average maximum initial pressure above atmosphere, in lbs. Maximum possible explosions per fifteen minutes Total actual explosions in fifteen minutes shown by explosion recorder Average number of actual explosions per minute Average indicated horse-power 46.35 44.92 156.8 1312.5 37.5 1,312 87.46 Indicated horse-power capacity of producer as deduced from gas production test 54.10 Gas used by engine in fifteen minutes, in cubic feet Experiments on the "Duplex" Gas Producer, using Slack as Fuel and Fan-blast GAS VOLUME TEST Date of trial. Time of trial Duration of trial Condition of weather Average temperature of outside air Average temperature of gas when entering holder Average pressure of crude gas in producer delivery pipe, in inches of water Density of slack used per cubic foot, in lbs. Total nett weight of slack fed into cupolas during trial, in lbs. Average nett weight of slack fed into cupolas during each hour, in lbs. . 542.25 67.78 Total volume of gas produced during trial in cubic feet Nett mean effective pressure, after allowing for work in lbs. per square inch Maximum possible explosions in fifteen minutes explosion recorder . Average number of actual explosions per minute 164 1,233 82.2 Average indicated horse-power 27.69 Indicated horse-power capacity of producers, as deducted Gas used per I.H.P. per hour, in cubic feet (including fan) Slack required per 1.H.P. per hour (neglecting fan), in lbs. 6 TABLE 3A Experiments on the "Simplex" Gas Producer, using Coke as fuel, and Steam-blast Average temperature of outside air Average temperature of gas when entering holder. Pressure of gas in holder, in inches of water. in inches of water. Six hours Cloudy with occasional showers 47° Fahr. 1.5 4.41 Density of coke used per cubic foot, in lbs. 27.25 Average net weight of coke fed into cupola during each hour, in lbs. 73.87 37,485 Total volume of gas produced during trial, in cubic feet cubic feet Weight of steam used for steam blower during trial, 15 Estimated equivalent weight of coke to raise steam for steam blower per hour, in lbs. Average mean pressure, neglecting pumping stroke, in lbs. per square inch . Net mean effective pressure, after allowing for work done in pumping stroke, in lbs. per square inch Average maximum initial pressure above atmosphere, in lbs. per square inch Maximum possible explosions in fifteen minutes Total actual explosions in fifteen minutes shown by the Average number of actual explosions per minute Average indicated horse-power Indicated horse-power capacity of producer, as deduced from gas-production test Gas used by engine per hour in cubic feet Gas used per 1.H.P. per hour, in cubic feet Coke required per 1.H.P. per hour (neglecting steam blower) in lbs. Coke required per I.H.P. per hour for raising steam for steam blower in lbs. Total coke required per I.H.P. per hour (including steam blower) in lbs. 10 inch 80 46.2 44.63 182 1,286 85.73 1,284 85.6 28.71 TABLE 4A 'Experiments on the " Simplex" Gas Producer, using Coke as fuel, Average pressure of crude gas in producer delivery pipe, Density of coke used per cubic foot, in lbs. Dull, but fine 46° Fahr. 59.25° Fahr. 1.5 |