RE: More on Patents13 Dec 2020 09:36
phimx you know jack **** about engineering dont you the numbers below are garbage and you know it looks good to the non tech person but having a 3.6 ton item in your exhaust line is comical to say the least saying it produces x power from the HP of an engine is rubbish why would you want power to the propeller? the engine already provides that your looking at excess electricity!!!! the charger looks like its 15-30% efficent from the boiler info we have so thats where the 20% comes from and the power to weight rubbish is just that 3.6 tons more than the engine itself lollolol,ololololololololololloollolo
HIS RUBBISH BELOW (and remeber i work in marine industry and have worked actually on diesel exhuast line design so pls dont try to bullish me on this one)
Rereading my post below I realised that I haven't conveyed exactly what I was intending.
Strictly the addition of a Charger doesn't DIRECTLY increase the power of the engine, think of a D13 in a boat say – but it could ! The Charger creates electricity from the waste heat in the exhaust so its free energy so it is simply improving engine efficiency, At the same time the boat propeller is still receiving the same engine power, before and after fitting of the Charger. But if the engine alternator was removed and the Stirling electricity was substituted then the power to the propeller would increase.
Having also reread the D13 specs it looks like, typically, it produces 700 HP. Adding the 6.4 kWe of the charger increases the efficiency of the D13 by 6400/522200 = 1.2%. Hardly worth the stamp for the letter of support.
To repeat previous posts, to improve the D13 by 20%, as stated by John Gunn, requires the Charger to output 140 HP or 140 x 746 = 104.4 kW. The Charger output has to increase by 16 times. Making a big ballpark assumption i.e. scaling the output to the engine ... it has to become 16 times bigger If it weighs 500 lb now then a bigger version would weigh 3.6 tons !!!!!!!! BIGGER THAN THE D13 ITSELF. Don’t expect the Volvo project to bear fruit anytime soon.
And that has always been the problem with Stirling engines – power to weight ratio.
No wonder Mr. Volvo only sent a letter to support John Gunn
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