Re: Re: Stirling Engines

[kenboak@stirlingservice.freeserve.co.uk]

Peter & Stovers

The heater head is rated at 650 C max,  but  should be alright for short times at 700C. Heat is continuously being removed from the head by the working gas so it shouldn't overheat if the engine is running.

Viebach also tried a "super-alloy" stainless steel for use at 700C.

Viebach does a set of plans for the amateur to construct his engine

Look at Bernd  Kammerich's site for details of hios wood fired Viebach configured as an alpha engine.

http://members.aol.com/BKammerich/mainengl.htm

Here is a whole page of links on Stirling Engines - too many to mention.

http://www.ucolick.org/~de/StirlingEngines.html


Technical data - translation from german

Dimensions:Height: approx. 600 mm Heating: arbitrary (prototype with propane gas) 
Surface area: approx. 350 x 300 mm
Cooling: Water cooling 
Weight, execution in aluminum casting: approx. 20 kg
Gas consumption without 225 gram/hour with 300 W mechanical  
With generator ST 05 g-g approx..30 kg 
Combustion air preheater  
Flywheel mass 7.5 kg of diameter: 280 mm Working piston diameter: 85 mm 
Idling speed: approx. 800 Umdr/min 
Displacer piston diameter: 96 mm 
Torque: 8 Nm 
Stroke: 75 mm 
Power Output - predicted: 300 - 500W 
Working medium: Air or nitrogen

Power achieved so far measured with 10 bar: 505 Watts 
Operating pressure: up to 10 bar
Achievement with generator: 450 Watts el. 
Thermomechanical efficiency(with burner) 22%
Necessary temperature at the heater head:
The engine runs starting from 200°C, for 500W max. 650°C <  
As refridgerator with air as work gas -100°C



Ken Boak


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