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. 1905 Excerpt: ... 300 X 294 9 X T = 22,687 B.T.U. Total 293,453 B.T.U. equivalent to about 250 lbs. of steam. A triple of such a size will have approximately 3,000 sq. ft. heating surface, and will utilise 6,000 lbs. stoain per hour. The loss then is, for an unlagged triple, about 4. By lagging with suitable material the loss can bo ...
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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. 1905 Excerpt: ... 300 X 294 9 X T = 22,687 B.T.U. Total 293,453 B.T.U. equivalent to about 250 lbs. of steam. A triple of such a size will have approximately 3,000 sq. ft. heating surface, and will utilise 6,000 lbs. stoain per hour. The loss then is, for an unlagged triple, about 4. By lagging with suitable material the loss can bo reduced to at least one-quarter of what it is with a naked pipe, so that an evaporator may roughly be estimated as losing by radiation 1 of the heat supplied. It is not only the loss of heat that is of importance in a badly-protected evaporator, but any fall in temperature of heating and vapour will tend to lower the efficiency of the apparatus as regards evaporation per unit of heating surface. The condensers which find use in forming and maintaining the vacuum in the last body of a multiple evaporator, may be classed either as jet or surface condensers, or again as dry or wet condensers. Surface condensation is now only employed when the vapour from the last body is used to heat the juice coming from the mills; in these apparatuses the juice circulates inside the tubes, the vapour being outside; in no case will the juice itself be sufficient to condense all the vapour, and the portion uncondensed is condensed by the usual method described below. By utilising the vapour from the last body in this way a certain economy is obtained, but these heaters have to be very carefully arranged so as not to obstruct the passage of the vapour and thus diminish the capacity of tho evaporator. The temperature to which the juice can be heated depends, of course, on the degree of vacuum in the last body; a 25 in. vacuum corresponds to a temperature of 133 F., and with this vacuum that is the highest temperature to which the juice can be raised. A numerical exam...
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Add this copy of Sugar and the Sugar Cane: an Elementary Treatise on the to cart. $71.00, good condition, Sold by Lawrence Jones rated 4.0 out of 5 stars, ships from Nobby Beach, QLD, AUSTRALIA, published 1905 by Norman Rodger.
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Seller's Description:
Good. 8vo. viii, 396, xix pp, ads, index, addendum, line drawings, 9 col plates, 2 bw plates. Or blue cloth. Front hinge starting, a little foxing, some minor flecking to cloth. All aspects of growing sugar cane and the extraction of sugar are covered.
