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Electric fan on tractor engine?
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<blockquote data-quote="Bloders" data-source="post: 7319691" data-attributes="member: 1111"><p>Your not going to fit a 48v alternator just to power an electric fan, and even at 48 volts, it still wants a fair old current to deliver 5hp.</p><p>However, if the machine was diesel electric, and the engine is simply powering a generator, then thats very different as the whole machine is set up for electric controls.</p><p></p><p>Powering things like water pumps and oil pumps electrically, can for the exact same reasons, increase efficiency.</p><p>Mecahnically driven pumps must provide adequate flow at tickover - great.</p><p>But when engine speed is increased, there is an excess flow of oil (in the oil pump example) which goes through the relief valve on the oil pump. This is 100% inefficiency. Also if the pump was electrically powered, you can pump engile oil at full pressure before the engine starts and after it shuts down, so improving startup lubrication and shutdown cooling (for turbos and the like)</p><p></p><p>When I was younger (about 15 or so) i was given a copy of the attached book. Id recomend it to everyone who wants to start their learning on diesel engines. This book was written for steam loco drivers to educate them to diesel </p><p>[URL unfurl="true"]https://www.amazon.co.uk/British-Railways-Diesel-Traction-Enginemen/dp/B0010ZL0MG[/URL]</p></blockquote><p></p>
[QUOTE="Bloders, post: 7319691, member: 1111"] Your not going to fit a 48v alternator just to power an electric fan, and even at 48 volts, it still wants a fair old current to deliver 5hp. However, if the machine was diesel electric, and the engine is simply powering a generator, then thats very different as the whole machine is set up for electric controls. Powering things like water pumps and oil pumps electrically, can for the exact same reasons, increase efficiency. Mecahnically driven pumps must provide adequate flow at tickover - great. But when engine speed is increased, there is an excess flow of oil (in the oil pump example) which goes through the relief valve on the oil pump. This is 100% inefficiency. Also if the pump was electrically powered, you can pump engile oil at full pressure before the engine starts and after it shuts down, so improving startup lubrication and shutdown cooling (for turbos and the like) When I was younger (about 15 or so) i was given a copy of the attached book. Id recomend it to everyone who wants to start their learning on diesel engines. This book was written for steam loco drivers to educate them to diesel [URL unfurl="true"]https://www.amazon.co.uk/British-Railways-Diesel-Traction-Enginemen/dp/B0010ZL0MG[/URL] [/QUOTE]
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Electric fan on tractor engine?
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