RE: Increased volume2 Aug 2021 22:55
Oldblue: Let us slowly work through your “answer” firstly your claim that Charger and WHR system are different entities. You also previously talked about different mediums air/water.
But I’ll let In-spirit themselves contradict your statement ! They say.
“The core development to date on the mCHP and Stirling Technology is the base technology that will be applied the marine, waste heat recovery and automotive sectors"
Now it is very clear, because In-spirit state it in black and white THE MCHP AND STIRLING TECHNOLOGY IS THE BASE THECHNOLOGY THAT WILL BE APPLIED TO THE MARINE, WHR AND AUTOMOTIVE SECTORS.
I think any sensible person would have no doubt in the interpretation that WHR is based upon the Stirling engine. At this point you may wish to dispute that conclusion but you would have no evidence whatsoever, from any In-spirit communication that some other ‘entity’ exists or is in development that does not use their Stirling engine.
So what Stirling engine ? Well again from the information at our disposal, In-spirit’s RNS statements from 2011 to the present; there is nothing that suggests there is anything but the 6.4 kW rated Stirling which has been in development for 10 years – supposedly and has cost investors millions.
The Stirling engine converts heat into electricity, For WHR we take a Stirling engine and throw the gas burner away and fit heat exchangers to the D13 exhaust and transfer that heat to the Stirling engine to produce ‘free’ electricity
We have all the data we need to perform a pathetically simple calculation. A 8.58 HP (6.4 kW) In-spirit Stirling engine can only improve a 375 HP D13 by 8.58/ 375 HP = 2.2 % efficiency gain. The gain is small compared to other theoretical systems i.e. the Rankine system you referenced and the In-spirit system is heavy and expensive.
There are no random numbers, there are just 2, both taken from manufacturers data. The calculation, if you can grace it with the term, is eminently sensible.
Your air/water mediums is bizarre. The only water is used to cool the cold end of the Stirling engine and thus a by-product is heating water, as used in the mCHP. Application.
The whole point of WHR is to create electricity from waste heat and thus improve the efficiency of the device which creates said waste heat.
If the Hoover and washing machine have the same motor then apart from different loads then it is very easy to compare their performance. As you say yourself IT IS THE SAME MOTOR
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