Pumping engine

The Stretham steam pumping engine (Fig. 16.8) was built in 1831 as part of an extensive project to drain the Fens for agricultural use. In its day it was one of the largest beam engines in the Fens, having a maximum power of 105 horsepower at 15 rpm (it could... 

Fig. 16.8. Part of tlie Stretham steam pumping engine. In the foreground are the crank and the lower end of the connecting rod. Also visible are the flywheel (with separate spokes and rim segments, all pegged together), the eccentric drive to the valve-gear and, in the background, an early treadle-driven lathe for on-the-spot repairs.

Pump Engineering Data, Economy Pumps, Inc., 1951, Philadelphia, Pa. 

Dean Brothers Pumps, Engineering Catalog Circular No. 190, Mar. 1958, Indianapolis, Ind. 

Figure 32.16 presents on the basis of the characteristic number the typical impeller profiles, velocity triangle shapes, and characteristic curves to be expected from the machine flow paths shown. This indicates the use of the number as a design tool for the pump engineer. 

Here Tc is the temperature of the cooling reservoir, i.e. the surroundings, while Th is the temperature of the process, i.e. the temperature of combustion. The Carnot efficiency is applicable for conventional heat pump engines. Efficiencies of more than 100 % correspond to converting heat from the surroundings into electricity and is only of academic interest, as is the high efficiency listed in Tab. 8.10. 

The fuel supply should have the capacity to operate the pump engine for not less than eight hours. If permitted by local regulations, the tank may be located inside the pump house, however, fill and vent lines should extend outdoors. Fuel lines should be steel. Similarly, the exhaust from the engines should... 

He perhaps saw the elevation of new continents by subterranean heat, and the lowering of the older continents by atmospheric agencies, as in some way analogous to the rise and fall of the piston in one ofWatt s early single-acting pumping engines.37... 

Robert Boyle, New Experiments (n. 33), 2-6, describes the airpump as devised by Hooke and the pumping engineer, Ralph Greatorex. Steven Shapin and Simon Schaffer, Leviathan and the Airpump Hobbes, Boyle, and the Experimental Life, Princeton University Press, 1985, discuss the philosophical questions posed by Boyle s airpump experiments. 

FIG. 5. Newcomen pumping engine operated under atmospheric pressure. Water sprayed into cylinder condensed steam, creating a vacuum. Piston descended into vacuum, to be returned to top of stroke by a new injection of steam. 

Balch, L.R. (1913). Test of a jet pump. Engineering Series Bulletin 7(4) 1-15. Univ. Wisconsin. Balch, L.R. (1914). Investigation of flow through four-inch submerged orifices and tubes. 

Cooley, M.E. (1891). Reports on the new Gaskill pumping engine, Kalamazoo Ml. Ann Arbor. Cooley, M.E. (1898). Notes on dynamics of machinery. Edwards Ann Arbor. 

Gaskill, H.F. (1882). Vertical pumping engine. US Patent Office Washington DC. 

Gaskill, H.F. (1884). Steam and hydraulic pumping engine. US Patent Office Washington DC. Gaskill, H.F. (1888). Patent of Duplex engine. Canada Patent CA 29859. 

---