Carpentry and Contracting; a Practical Reference Work on Carpentry, Building Superintendence, Etc Volume 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. 1919 edition. Excerpt: ...coil will be much more rapid than when the surrounding water becomes warmer. The average temperature of the water during the 10-hour period is 60; but the water leaving the pipe and in contact with the upper half of its surface is at a considerably higher temperature than the main body of water in the tank; therefore, with natural circulation, it is well to make ample allowance for the effect of this skin of warm water surrounding the steam coils, and to assume that they will not give off more than as much heat as that corresponding to the difference in temperature between the steam and the water in the tank, based on 100 heat units per degree difference as stated above. In other words, allow only 66f--or, in round numbers, 70--heat units per hour per degree difference in temperature between the steam and the water in the tank. If the difference in temperature is 230-70 = 160, on the basis stated, one square foot of coil would give off 70 X 160 = 11,200 heat units per square foot per hour; and since 600,000 heat units must be supplied to the water, a 53-square foot coil or slightly larger would be required, equal to about 122 ft. of lj-inch pipe. MODERN BATHROOM SHOWING EXCELLENT ARRANGEMENT OF FIXTURES IN SMALL SPACE Courtesy of the J. L. Mott Iron Works, New York City SANITARY APPLIANCES TRAPS Object of Traps. There are endless varieties of traps marketed, and each shape and type may have some particular advantage for the purpose it is used. Broadly, we can define a trap as a device holding a quantity of water and having an upper portion which dips into the water and forms the seal. The seal should be at least inches in depth for traps up to 2 inches in diameter and may be 2 inches deep for water closets and the large...