Minutes of Proceedings of the Institution of Civil Engineers Volume 98, PT. 4
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1889 edition. Excerpt: ... this must be set the cost of the gas used. This will vary in different localities, and the commercial gain will be the difference of cost of the fuel saved and the gas used. Since these experiments were made a better mode of burning the gas has been adopted. Professor Dwelshauvers Dery, of the University of Liege, was much interested in this novel way of heating the cylinder, and, at his request, copies of the results were sent to him. He has carefully analyzed these results and compared them with experiments in which two other ways of reducing cylinder-condensation were used. In Mr. Willans' experiments the amount of cylinder-condensation, reckoned per indicated HP., is reduced by increasing the speed of the engine. In Mr. Hirn's experiments the condensation is diminished by superheating the steam. The comparison of the economy obtained by these three methods is instructive. Table I.--Summary of Experiments on a 6-HP. Non-condensing SteamEnqine, With and Without Gas-flame Jacket, at Bermondsey, 1888. Feed-water I.HP.. Ordinary London gas/ Temperature-Steam-pres-j' sure above) atmosphere) Speed.. Steam from diagram. / Experiment. Date, 1888.... Duration. hours Feed-water per) I.HP. per lbs. hour...) I.HP. by diagrams. Gas burnt inj cu Bunsen bur-feet ner per hour) External tem-1 perature of LFah cyl. walls at top.. J Boiler-pressure. lbs. Initial pressure in cylinder /" Revolutions per min. (by counter).. / Total revolutions. Steam per I.HP. per hour cal-culated from diagrams at Percentage of steam'j used shown on I diagrams at 1gthsll stroke....1 Chief Eesults Of The Experiments. Table I, with and without gas, non-condensing.--Comparing experiments No. 3 with No. 9, there is an economy of 24 per cent. in feed-water per indicated...
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