Transactions of the Institution of Engineers and Shipbuilders in Scotland Volume 27
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. 1884 edition. Excerpt: ... heated up by the working steam, and afterwards subjected to a refrigerating influence. This striking illustration showed how a very large percentage of heat may be wasted in this way. This waste of heat, as he had before said, was in condensing engines carried to the condenser. Now, though the case given by Mr Weighton was a hypothetical one, quite as much could be lost in actual practice. He had, at a meeting of the Institution in 1879 when the discussion on the paper of Mr F. J. Rowan, "On the Use of High Pressure Steam," took place, given an account of a striking case of waste of heat to the condenser, which had come under his observation at an early period of his career as an engineer, and which he might again mention. It was in connection with the steamer "Athanasian," engined on the patent of Messrs Rowan & Horton. These engines were made after those of the "Thetis," which had obtained a great reputation for remarkable economy in fuel. The engines of the "Athanasian" were built expressly to effect a still greater saving in fuel. The " Thetis " had two cylinders, while the "Athanasian" had six, there being three attached to each connecting rod and crank. The three cylinders of each engine were placed vertically across the shaft, the high pressure cylinder in the ceutre, and the low pressure on either side. The piston rods of each were attached to a crosshead and worked simultaneously, the connecting rod having its upper joint in this crosshead, immediately below the high pressure piston rod. The high pressure cylinder was 9 J inches diameter, and the low pressure cylinders each 19 inches diameter, being a ratio of 8 to 1. The steam was intended to be worked at 100 or...
- 189 x 246 x 4mm | 154g
- 13 Sep 2013
- United States
- black & white illustrations