1

For stainless steel 18% Cr. 8% Ni

Measured life

Compustion gas flow

10^1 Lifetime

Measured life

Compustion gas flow

10^1 Lifetime

Hours

Fto. 14.13. Computed creep life expectation for heater tubes of nickel-base steels (Neelen etai 1971).

Philips Stirling Engine

Etc. 14.14. Cross-section of MAN/MWM four-cylindcr Type 4-100 double-acting Stirling engine (after Zacharias 1977).

Etc. 14.14. Cross-section of MAN/MWM four-cylindcr Type 4-100 double-acting Stirling engine (after Zacharias 1977).

of various Stirling-engine programmes in progress throughout the world. The principal activity of MAN/MWM was the development, in four-cylinder versions, of the MAN/MWM Type 4-100 engine shown in Fig.

14.14. Six- and eight-cylinder versions were said to be in prospect. Another interesting machine, briefly discussed by Zacharias in the 1977 paper, was the Stirling engine hydroelectric generator shown in Fig.

14.15. This unit was the result of a cooperative development program between MAN/MWM and the Battellc Institut. Frankfurt. The unit was rated at 15kVA and operated at 3000 revolutions per minute with helium as the working fluid at 12 MN/nr (120 bar) pressure. The overall system efficiency was 25 per cent, the system envelope measured 970x 600x600 mm (38.18x23.62x23.62 in) and the total system weighed 300 kg (661.5 lb J.

11 is understood that marine applications for Stirling engines, both surface and underwater, have always been part of the MAN/MWM

Fig. 14.15, Cross-section of MAN/MWM—Battctle Institut 15kVA Stirling-cnjtinc hyd-roelcctric gcnuntior (after Zacltarias 1977).

development program. Yet none of their publications have acknowledged this. It is further understood that this work is classified and sponsored by the German Ministry of Defence. It is said that the principal emphasis of the work is the development of underwater power systems of 515 to 735 kW (700 to 1000 hp) capacity. This, of course, is simply hearsay and should be treated speculatively until independently confirmed.

Solar Stirling Engine Basics Explained

Solar Stirling Engine Basics Explained

The solar Stirling engine is progressively becoming a viable alternative to solar panels for its higher efficiency. Stirling engines might be the best way to harvest the power provided by the sun. This is an easy-to-understand explanation of how Stirling engines work, the different types, and why they are more efficient than steam engines.

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