This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1871 Excerpt: ...the atmospheric pressure by 2i lbs, to 3 lbs. per square inch. Half a cubic foot of water evaporated per hour will in a moderately good engine give one indicated horse-power, and as 1 lb. of coals in a fair boiler will evaporate 7 lbs. of water, this corresponds to a consumption of fuel per horse-power per hour of 4571 ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1871 Excerpt: ...the atmospheric pressure by 2i lbs, to 3 lbs. per square inch. Half a cubic foot of water evaporated per hour will in a moderately good engine give one indicated horse-power, and as 1 lb. of coals in a fair boiler will evaporate 7 lbs. of water, this corresponds to a consumption of fuel per horse-power per hour of 4571 lbs. Properly to condense the waste steam from such an engine, 13 5 cubic feet of water will be required per hour for each indicated horse power. Under certain circumstances it would be possible to construct a reservoir, tank, or condenser strong enough to resist an atmospheric pressure of 11 lbs. or 12 lbs. per square inch, and large enough to contain the products of condensation for half an hour. Thus in the case of an engine working up to 100 horse power, some 1350 cubic feet of water would be required per hour, or 675 ft. in half an hour, which would be contained and something to spare in a cylinder U ft. 6 in. in diameter and 10 ft. high. If such a vessel were applied to an engine in lieu of an ordinary condenser, the steam might be condensed within it, and if no air entered a perfectly good vacuum might be maintained without any air pump whatever. When the vessel was nearly filled the injection might be shut off, a large valve opened at the bottom, and the entire contents blown out by the pressure of the exhaust steam and the gravity of the water. This operation, under proper arrangements, would not occupy more than a minute. On closing the lower valve and readmitting the injection the vacuum would be restored, and the engine would proceed as before, and the operation of blowing out might be effected automatically by a simple float arrangement. Unfortunately such a plan would not work well in practice, because of the air which would acc...
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
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Seller's Description:
PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
Choose your shipping method in Checkout. Costs may vary based on destination.
Seller's Description:
PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
