Mechanical laboratory methods; a testing of instruments and machines in the mechanical engineering laboratory and in practice (1918)
Smallwood, Julian Chase · New York, D. Van Nostrand company · leaf 162
quantity. The significance of heat quan-tities so counted enters when we take the difference betweentwo of them representing two conditions of H2O. Thus the heatper pound given up by a boiler in making steam is the differencebetween the heat content of the H2O leaving the boiler, countingfrom 32°,… … Heat added-0 ■h h-xL ^H*L =h*XL*CpCr-iO Fig. 68.—Heat Added to One Pound of H2O. To measure the heat of a given quantity of steam, it is neces-sary to know the amount in pounds and the heat content, i7, orheat added per pound; the one multiplied by the other givesthe heat of the total quantity. The…
Mechanical engineering laboratories
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