On Sat, 5 Dec 2009 06:06:56 -0800 (PST) LWB250 <lwb...@yahoo.com> wrote:
> Keep in mind that horsepower ratings are based on a particular point on > the torque/horsepower curve - and speed. I'm willing to bet that this > alternator is designed to run at 1800 rpm, so check the horsepower curve > on the engine at that speed - I'll bet you don't have 66hp, or even > enough to adequately power the alternator to nameplate rating. This was exactly the problem I had when I designed our Chevette engine powered, propane fired 4 kW genset. I had difficulty in finding information on engines running on gasoline at sea level let a lone on propane at 7000'. I ended up choosing the Chevette engine based on what little information I had and was concerned it wouldn't work well (the engine runs at 1720 rpm with a belt drive to the 2-pole generator turning at 3600 rpm). When I got everything together and running, I found it has more than enough power. I even thought of bolting our Kato Kamag 14 generator on the frame. > Keep this in mind when considering an engine to mate up with an > alternator: > > HP x 0.746 = kW > > Also, you need to have some reserve power for when those large loads hit > it, so you need to add some additional power on top of that.... The humongous flywheel I put in helps greatly with that and also smooths out the torque impulses from the 4-banger. And don't forget the generator isn't 100% efficient and there are bearing and other losses in the system. Craig _______________________________________ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
