3 ms·
TEGs are essentially unworkable if you want to produce kilowatt-class energy in a size that can fit a car.
by semi-extrinsic 2y ago
TEGs are essentially unworkable if you want to produce kilowatt-class energy in a size that can fit a car.
- floatrock 2y agoHow about in any industrial building that has a smokestack?
- deleted 2y ago[deleted]
- calvinmorrison 2y agoYou don't want to produce... kilowatt class energy, you would want to offset the losses of running accessories directly off the driveshaft. Spinning an alternator takes energy. Spinning parts also have wear issues like bearings etc. Secondly, in the Prius approach, it's about getting the engine to optimal temperature to reduce emissions and increase efficiency
- semi-extrinsic 2y agoYeah, but all these things (even the heat transfer from exhaust toncoolant in the Prius) need to transfer many kilowatts of energy to actually work. A kilowatt-class liquid heat exchanger is the size of a large coffee cup. A kilowatt-class TEG is the size of a car engine. See for instance the paper linked below, Fig. 12, their module is 1 m x 0.3 m x 0.35 m. For comparison the Ford 1.0 Ecoboost engine is famously said to fit on an A4 sheet of paper and produces 100 kW. So adding a TEG you would more than double the size of your engine for a 1% efficiency gain. https://pangea.stanford.edu/ERE/db/WGC/papers/WGC/2015/26009.pdf https://pangea.stanford.edu/ERE/db/WGC/papers/WGC/2015/26009...