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Fig. 1-1.7. Cylinder connections for. fuur- and six-cylindcr in-line double-acting Stirling The arrangements for transferring high-temperature heat available from the source combustion gas to the working fluid through the cylinder walls or heater tube walls are always of particular interest to the designer of Stirling engines. The MAN MWM heater was an elegant and functional system but it can be seen from Fig. 14.12 that the temperature distribution was by no means uniform in the tube. Hie...
Info Mys
Speed lt N c Superimposed power curves Fto. 10.1 Hypothetical power speed characteristics for a Stirling engine arid n load driven by the engine. Diagram a shows the power requirement as a function of speed for nn electric power generator, hydraulic pump, or pneumatic fan ns a function of different levels of voltage or pressuie. Diagram b shows the engine power output as a function of speed at diflerent levels of the mean pressure of the working fluid. Diagram c is the superimposed...
12 Philips Stirling Engines
Work on Stirling engines has been in progress since 1937 al the Research Laboratories of N. V. Philips Gloeilampenfabricken, Eindhoven, Netherlands, the large international company well known for electrical and electronic products. The work on Stirling engines, extending over 40 years, can be broken into distinct phases The initial phase, from 1937 to 1954, was primarily concerned with the establishment o new ideas and concepts about air engines and the development of small engines. The...
Regenerative Displacer Engines
Another model engineer interested in the Stirling engine is W. D. Urwick, of Malta, who has undertaken an extensive program of testing the regenerative displacer. In the Urwick design, the conventional displacer is replaced by a series of screen discs mounted on the displacer shaft, which act as a regenerator. Urwick 1975 reported various experiments in which the engine tested performed as well or better with this regenerative displacer than with a conventional displacer, despite the greatly...
Charles Louis Franchot
Interconnecting adjacent cylinders constitute one system. Interconnecting adjacent cylinders constitute one system. I'll . 6.1. Alternative arrangements of double-acting multiple cylinder engines. gities. Single-acting engines will doubtless continue to dominate the small-engine field. Single-acting Stirling engines were invented early in the nineteenth century, and the application in IS I 5 by Robert Stirling for his lirst engine patent may perhaps be reckoned an appropriate date. Other...
Bibliography
Agarwal, P. D., Mooney, R. J. and Toei-el, R. P. 1969 . Stirlec 1, a Stirling electric hybrid car. S.A.E. Paper No. 6900 74. Detroit. Michigan. Agio, B. 1971 . ' lie Deal ' free-piston engine. M.Sc. Tliesls, University of Calgary, Alberta, Canada. - 1973 . Theoretical and experimental performance of the Beale free-piston Stirling engine. Prac. Mth I.E.C.E.C Philadelphia. Pa Aug. 13-17. Alm, C. B. S., Carlo vist. S. Ci., Kuiilmann, P. F., Sti.vEROVisn, K. H. and Zacij arias, F. A. 1973 ....
Effects Of A Dj A Ba Hc Processes
Using the above theory Rallis, Urieli, and Berchowitz 1977 compared ideal regenerative cycles having isothermal and adiabatic processes of compression and expansion. They limited their comparison to cycles with constant volume regenerative processes. The cycle with isothermal compression and expansion was the ideal Stirling cycle. The cycle with adiabatic compression and expansion they called the pseudo-Stirling cycle. For both cycles they assumed that, in some cases, the regenerative process...
O 50
FlO. 9.13. Nitrogen oxides concentration in the exhaust of n I'lulips Stirling engine as a filiation of the inlet-air tempcrnluic after Mcijcr l970h . 1970b in presenting the data reproduced in Fig. 9.14. 1'his shows that the nitrogen oxides concentration of 110 parts per million was measured in the exhaust of a Stirling engine with no recirculation. With one third of the exhaust gas recirculated through the combustion chamber the concentration of nitrogen oxides was reduced to about one third...
Liquid Working Fluids
Closcd-cycle regenerative engines with liquid working fluids were described by John Malone 1931 . They conform in every way to the definition for a Stirling engine given in Chapter 1. However, liquid cycle regenerative engines are sufficiently different to be classified separately, perhaps as Malone-cycle engines. So far as is known. Malone presented only one account of his work. His paper was tantilizingly vague and non-technical but claimed that indicated elliciencies of 27 per cent were...
Seals
Scaling is undoubtedly the most difficult recurring problem in Stirling engines, The best way to increase the output of a Stirling engine of given size is to increase the pressure of the working fluid. Pressures therefore tend lo be high. Further, high-output engines use hydrogen or helium as the working fluid rather than the heavier gases such as air, or carbon dioxide. Seals are therefore required in the piston to contain the fluid in the working space and prevent its leaking to the...
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2 IDEAL THERMODYNAMIC CYCLES I I Some elementary considerations I I The First Law of Thermodynamics I I The Second Law of Thermodynamics 11 ' he Stirling cycle as a prime mover 20 The Stirling cycle as a refrigerating machine 20 The Stirling cycle as a heat pimip 22 'Hie Stirling cycle as a pressure generator 23 LifTects of adiabatic processes 36 The ported constant-volume regenerative cycle 38 3 PRACTICAL REGENERATIVE CYCLE 40 4 THEORETICAL ANALYSIS OF STIRLING ENGINES 47 Principal assumptions...
Robert St I Rung And His Family
A farmer of Dunblane, Perthshire, Scotland. Reputed to have invented the first rotary threshing machine in 1756 or 17.58. Built a water mill. Assistant minister at Mcthvcn in 1763, later minister at Crieff. Died in 17X7. His son, Michael, born in 1780, also entered the ministry. Peter Stirling was a farmer of Cloag, near Methven. Perthshire. He had two sons, Robert and James. Robert Stirling was born in Cloag on October 25, 1790. He studied at the University of Glasgow, as is mentioned in the...