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Re:Nuclear-Powered Cardiac Pacemakers by mminer237 on Friday September 02, 2022 @10:49AM (#32691500)
All energy from log burners comes from the fuel, and some ashes remain unburnt. They're under 100% efficient at converting fuel to heat. You put in x fuel and <x heat.

A heat pump takes heat from outside the system. You put in x fuel and you get >x heat. Getting more energy than you put in makes the efficiency over 100%.

Re:Nuclear-Powered Cardiac Pacemakers by OJFord on Friday September 02, 2022 @11:46AM (#32692162)
I know. You can't just ignore the bulk of the input and still call it 'efficiency' though.

Even manufacturers call this 'coefficient of performance', not efficiency.

Re:Nuclear-Powered Cardiac Pacemakers by MichaelCollins on Friday September 02, 2022 @02:41PM (#32694353)
Since precise use of language is so important to you:

> "You can't [...]"

He did, so obviously he can. You mean shouldn't, not can't.

Re:Nuclear-Powered Cardiac Pacemakers by OJFord on Saturday September 03, 2022 @11:47PM (#32709628)
Sure, a slightly irritating turn of phrase, not accurate. I didn't think it would be so controversial to hold terms of art/words with actual scientific meaning to a higher standard though.

If we're willing to be so blasé with 'efficiency' then why not, say, 'functional programming'? If it works it's functional right?

Re:Nuclear-Powered Cardiac Pacemakers by marshray on Friday September 02, 2022 @03:16PM (#32694708)
An implied qualification of "you can't [while remaining logically consistent]" is common usage.
Re:Nuclear-Powered Cardiac Pacemakers by bufferoverflow on Friday September 02, 2022 @04:52PM (#32695587)
> They're under 100% efficient at converting fuel to heat

I think only matter-antimatter reaction comes close to 100%. Burning fuels isn't even 1% of that.