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#21
13th February 2017, 08:41 PM
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That 75% is really interesting but it's actually a CHP (Combined Heat and Power) unit, so yes it's 75% efficient in that only 25% is "wasted" but a lot of it is used for heating.
Quite probably heating used in the refining process.  (PS I used to work for Esso and later BP and do know a fair bit about refineries) By the way, refineries produce the mix of fuels that they are designed to produce and this can be adjusted or changed, though big changes are not necessarily easy. Producing 19 gallons of petrol from 42 gallons of crude means little or nothing in efficiency terms, it's certainly not 19/42 (45%). A better measure is how much total energy is in the output fuels vs how much is consumed in the process. That may be the 88% you mentioned.
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2003 D2 FL S8. Irish Green Pearl/Beige. Solar sunroof, auto-dim mirrors, electric rear seat functions and extended leather. Ski hatch retrofit. Aftermarket reversing camera. DVB-T and XCarlink now removed as redundant. 2016 Volvo V40 T5 Cross Country (4WD) with ALL the toys including adaptive cruise etc. etc. Osmium Grey with Blonde/Charcoal leather interior. Polestar performance "optimisation".  (Even rarer than a D2 S8!) Oh, and a brand new engine at just under 30,000 miles on the factory one!  Finally: gone, but not forgotten..... 1998 D2 PF S8. Agate Grey/Platinum. Every option (I think) except electric rear seats, Tiptronic steering wheel, ski hatch, towbar & dimming door mirrors. e.g. Cruise control, NavPlus/TV, Bose, GSM, Xenons, Solar roof, Parking sensors, Alcantara/leather everywhere of course.  (internal dimming mirror added later)1998 (very early) Ford Focus 1.8 Zetec; ABS/TCS, Heated screen/mirrors, Aircon. Added Auto-dim mirror, Leather seats, Trip computer, Cruise control, OEM Ford SatNav with CD changer. And before that a lot of Rover 800s, a few oddities, a lovely Triumph Dolomite 1850HL with Overdrive and way back in my schooldays an Austin Seven aka Mini 850! 
Last edited by HPsauce; 13th February 2017 at 09:01 PM. 
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